CN116915559A

CN116915559A - Modulation mode blind detection method and device, electronic equipment and storage medium

Info

Publication number: CN116915559A
Application number: CN202311118097.1A
Authority: CN
Inventors: 汪博文; 朱剑驰; 佘小明; 陈鹏
Original assignee: China Telecom Technology Innovation Center; China Telecom Corp Ltd
Current assignee: China Telecom Technology Innovation Center; China Telecom Corp Ltd
Priority date: 2023-08-31
Filing date: 2023-08-31
Publication date: 2023-10-20

Abstract

The disclosure provides a modulation mode blind detection method, a device, electronic equipment and a storage medium, and relates to the technical field of wireless communication. The method comprises the following steps: receiving a downlink signal, wherein the downlink signal comprises at least one interference of co-scheduling signals, and each co-scheduling signal is applied with a phase offset corresponding to a debugging mode; acquiring a corresponding relation between a modulation mode and a phase offset value; and carrying out blind detection on the modulation modes according to the corresponding relation and the downlink signals to obtain the modulation mode of each co-scheduling signal. Compared with the method for carrying out blind detection based on a statistic method and a machine learning method, the method has the advantages that the accuracy of the modulation mode obtained by the blind detection is higher, so that the accuracy of a target signal demodulated according to a blind detection result is improved, and the communication efficiency is improved.

Description

Modulation mode blind detection method and device, electronic equipment and storage medium

Technical Field

The disclosure relates to the technical field of wireless communication, and in particular relates to a modulation mode blind detection method, a device, electronic equipment and a storage medium.

Background

In the field of communication technology, MIMO (Multiple-Input Multiple-Output) technology is one of effective methods for solving the upper limit of the capacity and the shortage of spectrum resources of a communication system.

In the MIMO system, after performing digital constellation modulation on downlink data of different UEs, the base station may send respective downlink signals to different UEs (User Equipment) at the same time, where the downlink data of different UEs are multiplexed with the same frequency resource block. In this way, the communication spectrum efficiency is improved, and meanwhile, the downlink signal received by the target UE includes, besides the own target signal, other interference of the downlink signal (co-scheduled signal) of the co-scheduled UE. However, under the condition of not increasing signaling scheduling, the target UE cannot learn the digital modulation mode of the same scheduling signal, so that the degree of similarity between the data demodulated according to the received downlink signal and the real downlink data is low, i.e. the accuracy of the demodulated data is low.

In the related art, blind detection is performed on the modulation mode of the coherent modulation signal based on a statistic method and a machine learning method, so that the UE can acquire the modulation mode of the coherent modulation signal, and the accuracy of the demodulated downlink data is improved.

However, the blind detection method based on the statistic method and the machine learning method has low accuracy of the obtained result.

It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

The disclosure provides a signal demodulation method, a device, electronic equipment and a storage medium, which at least improve the accuracy of a blind detection result of a modulation mode to a certain extent.

Other features and advantages of the present disclosure will be apparent from the following detailed description, or may be learned in part by the practice of the disclosure.

According to one aspect of the present disclosure, there is provided a modulation scheme blind detection method, including: receiving a downlink signal, wherein the downlink signal comprises at least one interference of co-scheduling signals, and each co-scheduling signal is applied with a phase offset corresponding to a debugging mode; acquiring a corresponding relation between a modulation mode and a phase offset value; and carrying out blind detection on the modulation mode according to the corresponding relation and the downlink signal to obtain the modulation mode of each co-scheduling signal.

In one embodiment of the present disclosure, after the base station performs digital constellation modulation on the signals, the base station determines and applies a phase offset value corresponding to the modulation mode of each co-scheduling signal according to the corresponding relationship.

In an embodiment of the present disclosure, the performing blind detection on the modulation mode according to the correspondence and the downlink signal to obtain a modulation mode of each co-scheduling signal includes: according to the corresponding relation and the downlink signals, calculating the negative log likelihood probability of the at least one coherent signal under various modulation mode combinations to obtain a plurality of negative log likelihood probabilities; taking a modulation mode combination corresponding to the minimum negative log-likelihood probability in the plurality of negative log-likelihood probabilities as a target modulation mode combination; and determining the modulation mode of each co-scheduling signal in the at least one co-scheduling signal according to the target modulation mode combination.

In an embodiment of the present disclosure, the calculating, according to the correspondence and the downlink signal, a negative log likelihood probability of the at least one coherent signal under various modulation mode combinations, to obtain a plurality of negative log likelihood probabilities includes:

calculating the negative log likelihood probability corresponding to each modulation mode combination according to the following formula;

wherein m is _i The combination is the ith modulation mode; k is the number of co-scheduling signals comprised by the at least one co-scheduling signal;the modulation mode of the kth coherent modulation signal under the ith modulation mode combination is used; />For modulation mode +.>Phase offset value at time; y is _l A physical downlink shared channel, PDSCH, symbol in the downlink signal; l is the number of PDSCH symbols in the downlink signal; h is a multi-user-multi-input/multi-output MU-MIMO transmission channel matrix; s is(s) ^* For the modulation mode combination of m _i When the Euclidean distance is minimum, a symbol vector is transmitted; sigma (sigma) ² Variance of zero mean gaussian noise; m is M _i For the modulation mode combination of m _i The number of all possible values of the symbol vector is transmitted; />Is Hadamard product operation.

In an embodiment of the present disclosure, the correspondence includes a plurality of modulation modes and corresponding phase offset values, where the phase offset values corresponding to any two modulation modes are different; and the maximum phase offset value in the phase offset values corresponding to the multiple modulation modes is smaller than pi/2.

In one embodiment of the present disclosure, the phase offset values corresponding to the multiple modulation modes are arranged from small to large to form an arithmetic progression.

In one embodiment of the disclosure, the phase offset corresponding to each of the multiple modulation modes is shown in the following formula:

wherein N is an index number corresponding to a modulation scheme, N is an integer, N is the number of modulation schemes included in the plurality of modulation schemes, and Q (N) is a phase offset value of the modulation scheme corresponding to the index number N.

According to another aspect of the present disclosure, there is provided a modulation mode blind detection apparatus, including: the receiving module is used for receiving downlink signals, the downlink signals comprise interference of at least one co-scheduling signal, and each co-scheduling signal is applied with phase offset corresponding to a debugging mode; the acquisition module is used for acquiring the corresponding relation between the modulation mode and the phase offset value; and the blind detection module is used for carrying out blind detection on the modulation mode according to the corresponding relation and the downlink signals to obtain the modulation mode of each scheduling signal.

In one embodiment of the disclosure, the blind detection module is configured to calculate, according to the correspondence and the downlink signal, a negative log likelihood probability of the at least one coherent modulation signal under various modulation mode combinations, to obtain a plurality of negative log likelihood probabilities; taking a modulation mode combination corresponding to the minimum negative log-likelihood probability in the plurality of negative log-likelihood probabilities as a target modulation mode combination; and determining the modulation mode of each co-scheduling signal in the at least one co-scheduling signal according to the target modulation mode combination.

In one embodiment of the disclosure, the blind detection module is configured to calculate a negative log likelihood probability corresponding to each modulation mode combination according to the following formula;

According to still another aspect of the present disclosure, there is provided an electronic apparatus including: a processor; and a memory for storing executable instructions of the processor; wherein the processor is configured to execute any of the modulation scheme blind detection methods described above via execution of the executable instructions.

According to yet another aspect of the present disclosure, there is provided a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements any of the modulation scheme blind detection methods described above.

According to yet another aspect of the present disclosure, there is provided a computer program product comprising a computer program or computer instructions loaded and executed by a processor to cause a computer to implement any of the modulation scheme blind detection methods described above.

The technical scheme provided by the embodiment of the disclosure at least comprises the following beneficial effects:

according to the technical scheme provided by the embodiment of the disclosure, the phase offset corresponding to each modulation mode is applied to the signals corresponding to different UE, so that the phase offset is applied to each scheduling signal received by the UE. On the basis, the modulation mode blind detection is carried out by utilizing the corresponding relation between the modulation mode and the phase offset value and the downlink signal, so that the modulation mode of each co-scheduling signal is obtained. Compared with the method for carrying out blind detection based on a statistic method and a machine learning method, the method has the advantages that the accuracy of the modulation mode obtained by the blind detection is higher, so that the accuracy of a target signal demodulated according to a blind detection result is improved, and the communication efficiency is improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort.

Fig. 1 shows a schematic diagram of a modulation scheme blind detection system in one embodiment of the present disclosure;

FIG. 2 illustrates a flow diagram of a data transmission process in one embodiment of the present disclosure;

FIG. 3 illustrates a flow diagram of a data reception process in one embodiment of the present disclosure;

FIG. 4 illustrates a flow chart of modulation scheme blind detection in one embodiment of the present disclosure;

fig. 5 shows a flow chart of modulation scheme blind detection in another embodiment of the present disclosure;

fig. 6 shows a schematic diagram of a modulation mode blind detection device in an embodiment of the disclosure;

fig. 7 shows a block diagram of an electronic device in one embodiment of the present disclosure.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus a repetitive description thereof will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities. These functional entities may be implemented in software or in one or more hardware modules or integrated circuits or in different networks and/or processor devices and/or microcontroller devices.

It should be understood that the various steps recited in the method embodiments of the present disclosure may be performed in a different order and/or performed in parallel. Furthermore, method embodiments may include additional steps and/or omit performing the illustrated steps. The scope of the present disclosure is not limited in this respect.

It should be noted that the terms "first," "second," and the like in this disclosure are merely used to distinguish between different devices, modules, or units and are not used to define an order or interdependence of functions performed by the devices, modules, or units.

It should be noted that references to "one", "a plurality" and "a plurality" in this disclosure are intended to be illustrative rather than limiting, and those of ordinary skill in the art will appreciate that "one or more" is intended to be understood as "one or more" unless the context clearly indicates otherwise.

Fig. 1 is a schematic diagram of a signal demodulation system in an embodiment of the disclosure, where the system may apply a modulation mode blind detection method or a modulation mode blind detection device in various embodiments of the disclosure.

As shown in fig. 1, the modulation mode blind detection system may include: a base station 101, a target UE 102, and at least one co-scheduling UE 103.

Wherein, the base station 101, the UE 102 and at least one co-scheduled UE 103 all apply MIMO technology, and in the presence of downlink traffic, the base station 101 needs to determine downlink data sent to the target UE 102 and downlink data sent to each co-scheduled UE 103. And then, respectively carrying out data transmission processing on the downlink data corresponding to each UE.

The process of transmitting data in the related art may be as shown in fig. 2, and the process may include S201 to S210.

S201: CRC (Cyclic Redundancy Check ) is added to the downstream data.

S202: based on the result obtained in S201, block division is performed and CRC is added.

S203: based on the result obtained in S202, encoding is performed.

S204: based on the result obtained in S203, rate matching is performed.

S205: scrambling is performed based on the result obtained in S204.

S206: based on the result obtained in S205, digital constellation modulation is performed.

S207: on the basis of the result obtained in S206, layer mapping precoding is performed.

S208: based on the result obtained in S207, resource mapping is performed.

S209: based on the result obtained in S208, an OFDM (orthogonal frequency division multiplexing ) signal is generated.

S210, framing is performed based on the result obtained in S209.

In the embodiment of the present disclosure, the procedure of the transmission data processing includes S2061 between S206 and S207 in addition to S201 to S210 described above: based on the result obtained in S206, phase shift is added. In this case, S207 is: on the basis of the result obtained in S2061, layer mapping precoding is performed.

When the phase offset is applied, the base station 101 may apply different phase offset values according to different modulation schemes.

In one embodiment, the base station 101 stores a correspondence between each modulation mode of the digital constellation modulation and the phase offset value, and according to the correspondence, the base station 101 may determine the phase offset value that needs to be applied. The phase shift values corresponding to the different modulation schemes are different.

In one embodiment, the correspondence between the modulation scheme and the phase offset value may be directly configured in the base station when the base station is established, may be generated by the core network and then configured in the base station, or may be configured in the base station based on any other scheme capable of configuring the correspondence in the base station, which is not limited in the present disclosure.

How the correspondence between the phase offset value and the modulation scheme is specific will be described in the embodiment corresponding to fig. 4, and will not be described in detail here.

After completing the data transmission processing of the downlink data, the base station 101 transmits the downlink signal obtained after the framing processing to the corresponding UE.

After receiving the downlink signal sent by the base station, the target UE 102 needs to perform received data processing to obtain downlink data that can be applied.

In an embodiment of the present disclosure, the process of receiving data processing may be as shown in fig. 3, and the process may include S301 to S311.

S301: and carrying out frame segmentation on the received downlink signal.

S302: based on the result obtained in S301, the OFDM signal is decoded.

S303: based on the result obtained in S302, a demapping is performed.

S304: based on the result obtained in S304, channel estimation is performed.

S305: based on the result obtained in S304, modulation blind detection is performed.

S306: based on the results obtained in S305 and S303, soft demodulation is performed.

S307: based on the result obtained in S306, descrambling is performed.

S308: decoding is performed based on the result obtained in S307.

S309: based on the result obtained in S308, rate matching reduction is performed.

S310: decoding is performed based on the result obtained in S309.

S311: based on the result obtained in S309, CRC check is performed.

The soft demodulation in S306 includes a process of resolving the phase shift.

It should be noted that, the specific implementation of the blind detection of the modulation method in S305 may be referred to the following embodiment corresponding to fig. 4, which is not described herein again.

In channel estimation, for the target UE 102 itself, it may perform channel estimation from the base station 101 to its own link according to the transmitted and received DMRS symbols (Demodulation Reference Signal, demodulation reference signals), in addition, the target UE 102 may also learn the DMRS transmission symbols corresponding to the co-scheduled UE 103 according to the DMRS sequence of the co-scheduled UE 103, and may acquire the channel matrix from the base station 101 to the co-scheduled UE 103 after combining with receiving the DMRS.

In the MIMO system, the base station 101 simultaneously transmits respective downlink signals to the target UE 102 and at least one co-scheduled UE 103, where the downlink signal received by the target UE 102 includes, in addition to the target signal, interference of each co-scheduled UE 103, where the interference may be referred to as a co-scheduled signal, that is, the downlink signal received by the target UE 102 includes the target signal and at least one co-scheduled signal. However, under the condition of not increasing signaling scheduling between the base station and the UE, the target UE 102 is difficult to acquire the modulation mode of the co-scheduling signal, so that the degree of similarity between the data demodulated according to the received downlink signal and the real downlink data is low, that is, the accuracy of the demodulated data is low.

The modulation mode of the coherent modulation signal can be obtained by a blind detection mode, however, the accuracy of the obtained result is low by the blind detection mode based on a statistic method and a machine learning method in the related technology. And applying phase offset corresponding to respective modulation modes to signals corresponding to different UEs, so that each scheduling signal received by the UE is applied with the phase offset. On the basis, the modulation mode blind detection is carried out by utilizing the corresponding relation between the modulation mode and the phase offset value and the downlink signal, so that the modulation mode of each co-scheduling signal is obtained. Compared with the blind detection mode based on a statistic method and a machine learning method, the blind detection mode has higher accuracy of a modulation mode obtained by blind detection, thereby being beneficial to improving the accuracy of a target signal demodulated according to a blind detection result and further improving the communication efficiency.

The base station 101 and the target UE 102, and at least one co-scheduling UE 103 are in communication connection through a network, which may be a wired network or a wireless network.

Alternatively, the wireless network or wired network described above uses standard communication techniques and/or protocols. The network is typically the Internet, but may be any network including, but not limited to, a local area network (Local Area Network, LAN), metropolitan area network (Metropolitan Area Network, MAN), wide area network (Wide Area Network, WAN), mobile, wired or wireless network, private network, or any combination of virtual private networks. In some embodiments, data exchanged over a network is represented using techniques and/or formats including HyperText Mark-up Language (HTML), extensible markup Language (Extensible MarkupLanguage, XML), and the like. All or some of the links may also be encrypted using conventional encryption techniques such as secure sockets layer (Secure Socket Layer, SSL), transport layer security (Transport Layer Security, TLS), virtual private network (Virtual Private Network, VPN), internet protocol security (Internet ProtocolSecurity, IPsec), etc. In other embodiments, custom and/or dedicated data communication techniques may also be used in place of or in addition to the data communication techniques described above.

The target UE 102, the at least one co-scheduled UE 103, may be a variety of electronic devices including, but not limited to, smartphones, tablets, laptop portable computers, desktop computers, wearable devices, augmented reality devices, virtual reality devices, and the like.

Those skilled in the art will appreciate that the number of co-scheduled UEs 103 in fig. 1 is merely illustrative, and that any number of co-scheduled UEs 103 may be provided as desired. The embodiments of the present disclosure are not limited in this regard.

The present exemplary embodiment will be described in detail below with reference to the accompanying drawings and examples.

The embodiment of the disclosure provides a modulation mode blind detection method, which can be executed by any electronic equipment with calculation processing capability. For example, the electronic device is set as a UE.

Fig. 4 shows a flow chart of a modulation mode blind detection method in an embodiment of the present disclosure, and as shown in fig. 4, the modulation mode blind detection method provided in the embodiment of the present disclosure includes the following steps

S401, receiving a downlink signal, wherein the downlink signal comprises at least one interference of co-scheduling signals, and each co-scheduling signal is applied with a phase offset corresponding to a debugging mode.

The embodiments of the present disclosure are not limited with respect to how many co-scheduled signals the at least one co-scheduled signal specifically includes, and the at least one co-scheduled signal may include one co-scheduled signal, may include two co-scheduled signals, and may include three or more co-scheduled signals.

For example, the downlink signal may be represented by the following equation 1:

wherein S is a target signal, H ₀ For the channel matrix corresponding to S, S _t For the t-th coherent signal, H _t Is s _t Corresponding channel matrix, k is the number of coherent signals, G is zero mean and variance is sigma ² Additive of (2)White gaussian noise.

S, s by the way _t To apply the phase shifted signal.

In the MIMO system, the base station sends respective downlink signals to the target UE and at least one co-scheduled UE at the same time, and in this case, the downlink signals received by the target UE include, in addition to the target signal, interference of each co-scheduled UE, where the interference may be referred to as a co-scheduled signal.

In one embodiment, after the base station performs digital constellation modulation on the signals, the phase offset value corresponding to the modulation mode of each co-scheduling signal is determined and applied according to the corresponding relation.

Before the base station transmits respective downlink signals to each UE (for any UE, the base station is a target UE, and other UEs are co-scheduled UEs) in the same schedule, the base station needs to perform data transmission processing such as digital constellation modulation on the downlink signals, after the digital constellation modulation, the base station selects a phase offset value corresponding to each UE according to a corresponding relation between the modulation mode and the phase offset according to a modulation mode of each UE in the current time slot and the schedule; and then, applying corresponding phase offset values to the downlink signals corresponding to the UE.

The embodiments of the present disclosure are not limited as to how the correspondence between the modulation scheme and the phase offset is specific. In one embodiment, the phase offset values corresponding to different modulation schemes are different, and the difference between the phase offset values corresponding to any two modulations is not equal to an integer multiple of pi/2.

In one embodiment, the corresponding relation includes a plurality of modulation modes and corresponding phase offset values, and the phase offset values corresponding to any two modulation modes are different; and the maximum value phase offset value in the phase offset values corresponding to the multiple modulation modes is smaller than pi/2.

After digital constellation modulation, the phase of the downlink signal is smaller than pi/2, which is beneficial to increasing the difference degree of the downlink signal after phase deviation in different modulation modes, thereby being beneficial to improving the accuracy of blind detection in the modulation modes.

Embodiments of the present disclosure are not limited with respect to which modulation scheme is specifically included. In one embodiment, the manner of digital constellation modulation may include: pi/2-BPSK (Binary Phase Shift Keying ), BPSK, QPSK (Quadrature Phase Shift Keying, quadrature phase shift keying), 16QAM (Quadrature Amplitude Modulation ), 64QAM, 256QAM, 1024QAM, etc.

For example, pi/2-BPSK, BPSK, QPSK, 16QAM, 64QAM, 256QAM and 1024QAM respectively correspond to one phase value in [0, pi/2), and the phase values corresponding to any two modulation modes are different, and the phase values are the phase offset values corresponding to the modulation modes.

Taking the phase offset value corresponding to 16QAM as an example, if the modulation mode of the downlink signal of a UE is 16QAM, the base station will apply pi/4 phase offset to the downlink signal of the UE according to the phase offset value corresponding to 16QAM being pi/4.

In one embodiment, the phase offset values corresponding to the multiple modulation modes are arranged from small to large to form an arithmetic progression.

Taking the modulation mode including pi/2-BPSK, BPSK, QPSK, 16QAM, 64QAM, 256QAM and 1024QAM, with the tolerance pi/20 and the first term 0 as an example, the corresponding relationship between the modulation mode and the phase offset value can be represented by the following table 1.

TABLE 1

In one embodiment, the difference between the phase offset values corresponding to different modulation modes is configured to be as large as possible, so that the detection results of the blind detection of the modulation modes are correct and have larger difference between the detection results of the blind detection of the modulation modes, and the accuracy of the detection results of the blind detection of the modulation modes is improved.

Based on this, in another embodiment, the phase offset corresponding to each of the plurality of modulation schemes is shown in the following equation 2:

where N is an index number corresponding to a modulation scheme, N is an integer, N is the number of modulation schemes included in the plurality of modulation schemes, and Q (N) is a phase offset value of the modulation scheme corresponding to the index number N.

Taking the index numbers 1-7 corresponding to the modulation modes pi/2-BPSK, BPSK, QPSK, 16QAM, 64QAM, 256QAM and 1024QAM as an example, the corresponding relationship between the modulation modes and the phase offset value can be represented by the following table 2.

TABLE 2

Modulation scheme	Phase offset value
		π/2-BPSK	0
BPSK	π/14
		QPSK	π/7
16QAM	3π/14
		64QAM	2π/7
256QAM	5π/14
		1024QAM	3π/7

Since the base station applies a phase offset to the downlink signal addressed to the UE, the downlink signal received by the UE is a signal to which a phase offset is applied, both the target signal and the synchronization signal.

Taking d as an example, the channel symbol of PDSCH (Physical Downlink Shared Channel ) after digital constellation modulation, the channel symbol after phase offset is applied can be shown in the following formula 3.

d′＝de ^jα (3)

Wherein, alpha is the phase offset value corresponding to the modulation mode.

For a particular UE in a slot, it applies the same phase offset across all symbols in the PDSCH. In the different time slots, the modulation schemes of the downlink signals of the same UE may be the same or different. However, in the same time slot, the modulation scheme of the downlink signal of the same UE is the same.

S402, obtaining the corresponding relation between the modulation mode and the phase offset value.

It should be noted that, the correspondence obtained by the UE is the same as the correspondence configured in the base station.

Embodiments of the present disclosure are not limited as to how the UE obtains the correspondence. In one embodiment, the correspondence may be configured in the UE directly. In another embodiment, the correspondence may be sent to the UE by other devices.

After the UE acquires the correspondence, the UE may store the correspondence, so that when the correspondence is applied subsequently, the UE may directly schedule use from the memory.

S403, performing blind detection on the modulation modes according to the corresponding relation and the downlink signals to obtain the modulation mode of each co-scheduling signal.

In one embodiment, performing blind detection on the modulation mode according to the correspondence and the downlink signal to obtain a modulation mode of each co-scheduling signal may include: according to the corresponding relation and the downlink signals, calculating the negative log likelihood probability of at least one coherent modulation signal under various modulation mode combinations to obtain a plurality of negative log likelihood probabilities; taking a modulation mode combination corresponding to the minimum negative log-likelihood probability in the plurality of negative log-likelihood probabilities as a target modulation mode combination; and determining the modulation mode of each co-scheduling signal in at least one co-scheduling signal according to the target modulation mode combination.

The modulation mode includes pi/2-BPSK, BPSK, QPSK, 16QAM, 64QAM, 256QAM and 1024QAM, 7 kinds are taken as an example, and at least one of the synchronous modulation signals includes 3 synchronous modulation signals. Then, for each of the modulation schemes corresponding to the respective synchronous modulation signals, 7 possibilities are provided, and accordingly, the 3 modulation scheme combinations corresponding to the synchronous modulation signals have 7×7×7=343 kinds, that is, in this case, it is necessary to calculate the respective negative log likelihood probabilities for the 343 kinds of modulation scheme combinations.

Embodiments of the present disclosure are not limited with respect to how the negative log likelihood probability for each modulation scheme combination is calculated in particular.

In one embodiment, according to the correspondence and the downlink signal, calculating the negative log likelihood probability of at least one coherent modulation signal under various modulation mode combinations to obtain a plurality of negative log likelihood probabilities, including: calculating the negative log likelihood probability corresponding to each modulation mode combination according to the following formulas 4-7;

wherein m is _i The combination is the ith modulation mode; k is the number of co-scheduling signals comprised by the at least one co-scheduling signal;the modulation mode of the kth coherent modulation signal under the ith modulation mode combination is used; />For modulation mode +.>Phase offset value at time; y is _l A physical downlink shared channel, PDSCH, symbol in the downlink signal; l is the number of PDSCH symbols in the downlink signal; h is MU-MIMO transmission channel matrix; s is(s) ^* For the modulation mode combination of m _i When the Euclidean distance is minimum, a symbol vector is transmitted; sigma (sigma) ² Variance of zero mean gaussian noise; m is M _i For the modulation mode combination of m _i The number of all possible values of the symbol vector is transmitted; />Is Hadamard product operation.

When the base station transmits a downlink signal to the UE at a time, PDSCH symbols in the downlink signal are all located in the same slot.

In order to facilitate understanding of the modulation method provided by the present disclosure, the following description will be made with reference to fig. 5.

S501, the network determines the phase offset corresponding to each modulation scheme, and tabulates (the correspondence between modulation schemes and phase offsets) the transmitting base station and UE.

S502, when downlink service exists, the base station determines downlink data sent to each UE; performing data transmission processing, wherein after digital constellation modulation, corresponding phase offset values are determined according to a phase offset table according to the modulation mode of each UE in the current time slot; for each UE, applying a corresponding phase offset to all data symbols of the PDSCH channel; and after finishing the subsequent channel coding and other processes, sending downlink signals to each UE.

S503, the target UE receives the downlink signal sent by the base station, estimates the channel matrix of the UE according to the DMRS, and the channel matrix of the UE with the same scheduling.

S504, performing blind detection on the modulation mode according to all user channel matrixes, the phase offset tables and the downlink signals, and determining the modulation mode of the PDSCH channels of the same scheduling UE.

It should be noted that, in the embodiment corresponding to fig. 5, the manner of configuring the correspondence relationship by the network to the base station and the UE is merely exemplary.

Based on the same inventive concept, the embodiment of the disclosure also provides a modulation mode blind detection device, as the following embodiment. Since the principle of solving the problem of the embodiment of the device is similar to that of the embodiment of the method, the implementation of the embodiment of the device can be referred to the implementation of the embodiment of the method, and the repetition is omitted.

Fig. 6 shows a schematic diagram of a modulation mode blind detection device in an embodiment of the disclosure, as shown in fig. 6, the device includes: a receiving module 601, configured to receive a downlink signal, where the downlink signal includes at least one interference of co-scheduling signals, and each co-scheduling signal is applied with a phase offset corresponding to a debug mode; an obtaining module 602, configured to obtain a correspondence between a modulation mode and a phase offset value; the blind detection module 603 is configured to perform blind detection on the modulation mode according to the correspondence and the downlink signal, so as to obtain a modulation mode of each co-scheduling signal.

In one embodiment of the present disclosure, the blind detection module 603 is configured to calculate, according to the correspondence and the downlink signal, a negative log likelihood probability of at least one coherent signal under various modulation mode combinations, to obtain a plurality of negative log likelihood probabilities; taking a modulation mode combination corresponding to the minimum negative log-likelihood probability in the plurality of negative log-likelihood probabilities as a target modulation mode combination; and determining the modulation mode of each co-scheduling signal in at least one co-scheduling signal according to the target modulation mode combination.

In one embodiment of the present disclosure, the blind detection module 603 is configured to calculate a negative log likelihood probability corresponding to each modulation mode combination according to the following formula;

In one embodiment of the present disclosure, the correspondence includes a plurality of modulation modes and corresponding phase offset values, and the phase offset values corresponding to any two modulation modes are different; the maximum phase offset value in the phase offset values corresponding to the multiple modulation modes is smaller than pi/2.

In one embodiment of the present disclosure, the phase offset corresponding to each of the plurality of modulation schemes is shown in the following formula:

Those skilled in the art will appreciate that the various aspects of the present disclosure may be implemented as a system, method, or program product. Accordingly, various aspects of the disclosure may be embodied in the following forms, namely: an entirely hardware embodiment, an entirely software embodiment (including firmware, micro-code, etc.) or an embodiment combining hardware and software aspects may be referred to herein as a "circuit," module "or" system.

An electronic device 700 according to such an embodiment of the present disclosure is described below with reference to fig. 7. The electronic device 700 shown in fig. 7 is merely an example and should not be construed to limit the functionality and scope of use of embodiments of the present disclosure in any way.

As shown in fig. 7, the electronic device 700 is embodied in the form of a general purpose computing device. Components of electronic device 700 may include, but are not limited to: the at least one processing unit 710, the at least one memory unit 720, and a bus 730 connecting the different system components, including the memory unit 720 and the processing unit 710.

Wherein the storage unit stores program code that is executable by the processing unit 710 such that the processing unit 710 performs steps according to various exemplary embodiments of the present disclosure described in the section "detailed description of the invention" above.

The memory unit 720 may include readable media in the form of volatile memory units, such as Random Access Memory (RAM) 7201 and/or cache memory 7202, and may further include Read Only Memory (ROM) 7203.

The storage unit 720 may also include a program/utility 7204 having a set (at least one) of program modules 7205, such program modules 7205 including, but not limited to: an operating system, one or more application programs, other program modules, and program data, each or some combination of which may include an implementation of a network environment.

Bus 730 may be a bus representing one or more of several types of bus structures including a memory unit bus or memory unit controller, a peripheral bus, an accelerated graphics port, a processing unit, or a local bus using any of a variety of bus architectures.

The electronic device 700 may also communicate with one or more external devices 740 (e.g., keyboard, pointing device, bluetooth device, etc.), one or more devices that enable a user to interact with the electronic device 700, and/or any device (e.g., router, modem, etc.) that enables the electronic device 700 to communicate with one or more other computing devices. Such communication may occur through an input/output (I/O) interface 750. Also, electronic device 700 may communicate with one or more networks such as a Local Area Network (LAN), a Wide Area Network (WAN) and/or a public network, such as the Internet, through network adapter 760. As shown in fig. 7, network adapter 760 communicates with other modules of electronic device 700 over bus 730. It should be appreciated that although not shown, other hardware and/or software modules may be used in connection with electronic device 700, including, but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, data backup storage systems, and the like.

From the above description of embodiments, those skilled in the art will readily appreciate that the example embodiments described herein may be implemented in software, or may be implemented in software in combination with the necessary hardware. Thus, the technical solution according to the embodiments of the present disclosure may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (may be a CD-ROM, a U-disk, a mobile hard disk, etc.) or on a network, including several instructions to cause a computing device (may be a personal computer, a server, a terminal device, or a network device, etc.) to perform the method according to the embodiments of the present disclosure.

In an exemplary embodiment of the present disclosure, a computer-readable storage medium, which may be a readable signal medium or a readable storage medium, is also provided. On which a program product is stored which enables the implementation of the method described above of the present disclosure. In some possible implementations, various aspects of the disclosure may also be implemented in the form of a program product comprising program code for causing a terminal device to carry out the steps according to the various exemplary embodiments of the disclosure as described in the section "detailed description" above of the disclosure, when the program product is run on the terminal device.

More specific examples of the computer readable storage medium in the present disclosure may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

In this disclosure, a computer readable storage medium may include a data signal propagated in baseband or as part of a carrier wave, with readable program code embodied therein. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A readable signal medium may also be any readable medium that is not a readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.

Alternatively, the program code embodied on a computer readable storage medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

In particular implementations, the program code for carrying out operations of the present disclosure may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device, partly on a remote computing device, or entirely on the remote computing device or server. In the case of remote computing devices, the remote computing device may be connected to the user computing device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computing device (e.g., connected via the Internet using an Internet service provider).

In an exemplary embodiment of the present disclosure, there is also provided a computer program product including a computer program or computer instructions loaded and executed by a processor to cause the computer to carry out the steps according to the various exemplary embodiments of the present disclosure described in the section "detailed description" above.

It should be noted that although in the above detailed description several modules or units of a device for action execution are mentioned, such a division is not mandatory. Indeed, the features and functionality of two or more modules or units described above may be embodied in one module or unit in accordance with embodiments of the present disclosure. Conversely, the features and functions of one module or unit described above may be further divided into a plurality of modules or units to be embodied.

Furthermore, although the steps of the methods in the present disclosure are depicted in a particular order in the drawings, this does not require or imply that the steps must be performed in that particular order or that all illustrated steps be performed in order to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step to perform, and/or one step decomposed into multiple steps to perform, etc.

From the description of the above embodiments, those skilled in the art will readily appreciate that the example embodiments described herein may be implemented in software, or may be implemented in software in combination with the necessary hardware. Thus, the technical solution according to the embodiments of the present disclosure may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (may be a CD-ROM, a U-disk, a mobile hard disk, etc.) or on a network, including several instructions to cause a computing device (may be a personal computer, a server, a mobile terminal, or a network device, etc.) to perform the method according to the embodiments of the present disclosure.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any adaptations, uses, or adaptations of the disclosure following the general principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope of the disclosure being indicated by the following claims.

Claims

1. A modulation-scheme blind detection method, comprising:

receiving a downlink signal, wherein the downlink signal comprises at least one interference of co-scheduling signals, and each co-scheduling signal is applied with a phase offset corresponding to a debugging mode;

acquiring a corresponding relation between a modulation mode and a phase offset value;

and carrying out blind detection on the modulation mode according to the corresponding relation and the downlink signal to obtain the modulation mode of each co-scheduling signal.

2. The method of claim 1 wherein the phase offset corresponding to each co-scheduled signal is determined and applied by the base station after the digital constellation modulation of the signal according to the correspondence.

3. The method of claim 1, wherein the performing blind detection on the modulation scheme according to the correspondence and the downlink signal to obtain a modulation scheme of each co-scheduling signal includes:

according to the corresponding relation and the downlink signals, calculating the negative log likelihood probability of the at least one coherent signal under various modulation mode combinations to obtain a plurality of negative log likelihood probabilities;

taking a modulation mode combination corresponding to the minimum negative log-likelihood probability in the plurality of negative log-likelihood probabilities as a target modulation mode combination;

and determining the modulation mode of each co-scheduling signal in the at least one co-scheduling signal according to the target modulation mode combination.

4. The method of claim 3, wherein calculating the negative log likelihood probability of the at least one coherent signal under various modulation scheme combinations according to the correspondence and the downlink signal, to obtain a plurality of negative log likelihood probabilities, comprises:

wherein m is _i The combination is the ith modulation mode; k is the number of co-scheduling signals comprised by the at least one co-scheduling signal; The modulation mode of the kth coherent modulation signal under the ith modulation mode combination is used; />For modulation mode +.>Phase offset value at time; y is _l A physical downlink shared channel, PDSCH, symbol in the downlink signal; l is the number of PDSCH symbols in the downlink signal; h is a multi-user-multi-input/multi-output MU-MIMO transmission channel matrix; s is(s) ^* For the modulation mode combination of m _i When the Euclidean distance is minimum, a symbol vector is transmitted; sigma (sigma) ² Variance of zero mean gaussian noise; m is M _i For the modulation mode combination of m _i The number of all possible values of the symbol vector is transmitted; the degree is Hadamard product operation.

5. The method according to any one of claims 1-4, wherein the correspondence includes a plurality of modulation schemes and corresponding phase offset values, and the phase offset values corresponding to any two modulation schemes are different;

and the maximum phase offset value in the phase offset values corresponding to the multiple modulation modes is smaller than pi/2.

6. The method of claim 5, wherein the phase offset values corresponding to the plurality of modulation schemes are arranged from small to large to form an arithmetic progression.

7. The method of claim 6, wherein the phase offset for each of the plurality of modulation schemes is represented by the formula:

8. A modulation-scheme blind detection device, comprising:

the receiving module is used for receiving downlink signals, the downlink signals comprise interference of at least one co-scheduling signal, and each co-scheduling signal is applied with phase offset corresponding to a debugging mode;

the acquisition module is used for acquiring the corresponding relation between the modulation mode and the phase offset value;

and the blind detection module is used for carrying out blind detection on the modulation mode according to the corresponding relation and the downlink signals to obtain the modulation mode of each scheduling signal.

9. An electronic device, comprising:

a processor; and

a memory for storing executable instructions of the processor;

wherein the processor is configured to perform the modulation scheme blind detection method of any one of claims 1-7 via execution of the executable instructions.

10. A computer readable storage medium having stored thereon a computer program, wherein the computer program when executed by a processor implements the modulation scheme blind detection method of any of claims 1 to 7.