CN109274458A - Method and device for realizing decoding processing - Google Patents

Abstract

A method and apparatus for implementing a decoding process, comprising: a near-end user equipment (UE) selecting a limited quadrant of a received signal based on power indication information; and performing demodulation processing of the received signal based on the selected limited quadrant. The embodiment of the invention simplifies the demodulation complexity of the near-end UE and improves the efficiency of data processing.

Description

Method and device for realizing decoding processing

Technical field

This document relates to, but is not limited to, wireless transmission technology, and more particularly to a method and apparatus for implementing decoding processing.

Background technique

Non-orthogonal access has become an important access solution in the design of the new Long Term Evolution Advanced (LTE-A) system and the new air interface of the fifth generation mobile communication technology (5G). In the LTER14 version, non-orthogonal access has been identified as an important new access method. Currently, the non-orthogonal access scheme supported in LTE-A is a Multi-user Superposition Transmission (MUST) scheme. In the MUST transmission scheme, transmission data of two user equipments (UEs) are superimposed and transmitted on the same time-frequency domain resource. The superimposed data of the two UEs achieve separation of the superposed signals in the power domain (large scale fading).

FIG. 1 is a schematic diagram of data transmission using MUST in the related art. As shown in FIG. 1 , a superposed signal of two UEs is presented as a composite constellation on the UE side. For example, let (M_near, N_far) be a combination of modulation schemes of the near-end UE and the far-end UE. Then, when (M_near, N_far) is (Quadrature Phase Shift Keyin (QPSK)), the near-end UE will receive a quadrature amplitude modulation based on the superimposed irregular 16 symbols (16QAM). The signal of the constellation. Based on the MUST superposition transmission scheme, the receiving constellation of the near-end UE will increase by 4 times, that is, the demodulated search range will be expanded by 4 times, which will bring about an increase in the demodulation complexity of the receiving end. 2 is a schematic diagram of a change of a constellation diagram of a receiving end in the related art, as shown in FIG. 2, wherein a circle represents a virtual constellation point, and a black dot represents an overlapping constellation point. Due to the superimposed transmission, the signal constellation diagram of the receiving end is expanded by 4 times. Composite constellation diagram. If a conventional demodulation or decoding algorithm is employed, a significant increase in demodulation or decoding complexity will result; when each superimposed UE implements multi-layer data stream transmission, the UE's The demodulation complexity will increase exponentially. The demodulation methods in the related art mainly include joint detection and interference cancellation; the search range of the demodulation method is generally based on all constellation points. Although the use of sphere decoding in the related art can reduce the complexity, the sphere decoding is also based on algorithm optimization performed by a conventional constellation diagram. Therefore, conventional sphere decoding is still more complicated.

In summary, the decoding process has high complexity in the related art, which affects the demodulation efficiency of the transmitted data.

Summary of the invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

Embodiments of the present invention provide a method and a terminal for implementing a decoding process, which can simplify decoding processing and improve demodulation efficiency.

An embodiment of the present invention provides a method for implementing a decoding process, including:

The near-end user equipment UE selects a limited quadrant of the received signal based on the power indication information;

Demodulation processing of the received signal is performed based on the selected limited quadrant.

Optionally, the defining the quadrant of the received signal based on the power indication information includes:

Forming a virtual constellation point of the received signal based on power indication information from a transmitting end;

Performing a first level of decoding according to the formed virtual constellation points, and selecting a defined quadrant of the received signal.

Optionally, the power indication information includes: information determined by a modulation constellation of the transmitting end;

The modulation constellation of the transmitting end is: α is a power allocation coefficient less than 1, s ₁ is a signal of a near-end UE, and s ₂ is a signal of a far-end UE.

Optionally, the performing signal demodulation based on the selected limited quadrant includes:

Performing a second level decoding on the selected received signal in the defined quadrant;

The result of the first stage decoding and the result of the second stage decoding are used as decoding information obtained by demodulation; or the result of the second stage decoding is used as decoding information obtained by demodulation.

In another aspect, the embodiment of the present invention further provides a terminal, including: a first unit and a second unit;

The first unit is configured to: select a limited quadrant of the received signal based on the power indication information;

The second unit is configured to: perform demodulation processing of the received signal based on the selected limited quadrant.

Optionally, the first unit is specifically configured to:

Forming a virtual constellation point of the received signal based on power indication information from a transmitting end;

Performing a first level of decoding according to the formed virtual constellation points, and selecting a defined quadrant of the received signal.

Optionally, the power indication information includes: information determined by a modulation constellation of the transmitting end;

The modulation constellation of the transmitting end is: α is a power allocation coefficient less than 1, s ₁ is a signal of a near-end UE, and s ₂ is a signal of a far-end UE.

Optionally, the second unit is specifically configured to perform second-level decoding on the received signal in the selected limited quadrant;

The result of the first stage decoding and the result of the second stage decoding are used as decoding information obtained by demodulation; or the result of the second stage decoding is used as decoding information obtained by demodulation.

In still another aspect, an embodiment of the present invention further provides a computer storage medium. The computer storage medium stores computer executable instructions, and the computer executable instructions are used to execute the foregoing method for implementing the decoding process.

In another aspect, an embodiment of the present invention further provides a terminal that implements a decoding process, including: a memory and a processor;

The processor is configured to execute program instructions in the memory;

Program instructions perform the following operations on the processor read:

Selecting a limited quadrant of the received signal based on the power indication information;

Demodulation processing of the received signal is performed based on the selected limited quadrant.

Compared with the related art, the technical solution of the present application includes: the near-end user equipment (UE) selects a limited quadrant of the received signal based on the power indication information; and selects a demodulation process of the received signal based on the formed limited quadrant. The embodiment of the invention simplifies the demodulation complexity of the near-end UE and improves the efficiency of data processing.

Other features and advantages of the invention will be set forth in the description which follows, The objectives and other advantages of the invention may be realized and obtained by means of the structure particularly pointed in the appended claims.

DRAWINGS

The drawings are used to provide a further understanding of the technical solutions of the present invention, and constitute a part of the specification, which together with the embodiments of the present application are used to explain the technical solutions of the present invention, and do not constitute a limitation of the technical solutions of the present invention.

1 is a schematic diagram of data transmission using MUST in the related art;

2 is a schematic diagram showing changes in a constellation diagram of a receiving end in the related art;

3 is a flowchart of a method for implementing decoding processing according to an embodiment of the present invention;

4 is a schematic diagram of performing sphere decoding according to an embodiment of the present invention;

FIG. 5 is a structural block diagram of a terminal for implementing decoding processing according to an embodiment of the present invention; FIG.

6 is a structural block diagram of a system for implementing decoding processing according to an optional embodiment of the present invention;

7 is a flow chart of a method for applying an example of the present invention.

Detailed ways

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.

The steps illustrated in the flowchart of the figures may be executed in a computer system such as a set of computer executable instructions. Also, although logical sequences are shown in the flowcharts, in some cases the steps shown or described may be performed in a different order than the ones described herein.

FIG. 3 is a flowchart of a method for implementing a decoding process according to an embodiment of the present invention. As shown in FIG. 3, the method includes:

Step 300: The near end user equipment (UE) selects a limited quadrant of the received signal based on the power indication information.

Optionally, the limiting quadrant for selecting the received signal based on the power indication information in the embodiment of the present invention includes:

Forming a virtual constellation point of the received signal based on power indication information from a transmitting end;

Performing a first level of decoding according to the formed virtual constellation points, and selecting a defined quadrant of the received signal.

Optionally, the power indication information of the embodiment of the present invention is determined by a modulation constellation of the transmitting end;

The modulation constellation of the transmitting end is: α is a power allocation coefficient less than 1, s ₁ is a signal of a near-end UE, and s ₂ is a signal of a far-end UE.

It should be noted that, based on the modulation constellation of the foregoing transmitting end, determining four virtual constellation points may be:

Step 301: Perform demodulation processing of the received signal based on the selected limited quadrant.

Optionally, the performing signal demodulation based on the selected limited quadrant according to the embodiment of the present invention includes:

Performing a second level decoding on the received signal in the selected limited quadrant;

The result of the first stage decoding and the result of the second stage decoding are used as decoding information obtained by demodulation; or the result of the second stage decoding is used as decoding information obtained by demodulation.

It should be noted that the demodulation result of the embodiment of the present invention may include a combination of two-level decoding results to obtain complete decoding information. It is also possible to use only the result of the second stage decoding; since the data decoded by the first stage belongs to the far end data, it can be discarded.

The first stage decoding and/or the second level decoding in the embodiment of the present invention may be a sphere decoding, or may be other decoding in the related art.

4 is a schematic diagram of performing sphere decoding according to an embodiment of the present invention. As shown in FIG. 4, after determining a limited quadrant of a received signal by first-stage decoding, the received signal in the limited quadrant is demodulated by second-level decoding. deal with.

Compared with the related art, the technical solution of the present application includes: a near-end user equipment (UE) selects a limited quadrant of a received signal based on the power indication information; and performs demodulation processing of the received signal based on the selected limited quadrant. The embodiment of the invention simplifies the demodulation complexity of the near-end UE and improves the efficiency of data processing.

5 is a structural block diagram of a terminal according to an embodiment of the present invention. As shown in FIG. 5, the method includes: a first unit and a second unit;

The first unit is configured to: select a limited quadrant of the received signal based on the power indication information;

Optionally, the first unit of the embodiment of the present invention is specifically configured to:

Forming a virtual constellation point of the received signal based on power indication information of the transmitting end;

Performing a first level of decoding according to the formed virtual constellation points, and selecting a defined quadrant of the received signal.

Optionally, the power indication information of the embodiment of the present invention is determined by a modulation constellation of the transmitting end;

The modulation constellation of the transmitting end is: α is a power allocation coefficient less than 1, s ₁ is a signal of a near-end UE, and s ₂ is a signal of a far-end UE.

It should be noted that, based on the modulation constellation of the foregoing transmitting end, determining four virtual constellation points may be:

The second unit is configured to: perform demodulation processing of the received signal based on the selected limited quadrant.

It should be noted that, in the embodiment of the present invention, the terminal is a near-end UE, and the transmitting end and the remote UE do not change during the data transmission processing. FIG. 6 is a system structure for implementing decoding processing according to an optional embodiment of the present invention. The block diagram, as shown in Figure 6, shows that the other terminals in the system have not changed except for the change of the near-end UE.

Optionally, the second unit of the embodiment of the present invention is specifically configured to: perform second-level decoding on the received signal in the selected limited quadrant.

In still another aspect, an embodiment of the present invention further provides a computer storage medium. The computer storage medium stores computer executable instructions, and the computer executable instructions are used to execute the foregoing method for implementing the decoding process.

In another aspect, an embodiment of the present invention further provides a terminal that implements a decoding process, including: a memory and a processor;

The processor is configured to execute program instructions in the memory;

Program instructions perform the following operations on the processor read:

Selecting a limited quadrant of the received signal based on the power indication information;

Demodulation processing of the received signal is performed based on the selected limited quadrant.

The method of the embodiments of the present invention is described in detail below by using the application examples. The application examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

Application example

This application example is based on the superimposed non-orthogonal access transmission mode, and the receiving end presents a composite constellation of two UE superpositions. FIG. 7 is a flowchart of a method for applying an example of the present invention. As shown in FIG. 7, the method includes:

Step 700: The base station implements matching between the remote end and the near end UE.

In step 700, the base station performs pairing of the far-end and the near-end UE according to the channel information of the multiple UEs, and performs superposition transmission.

Step 701: Form an overlay constellation by matching between the remote end and the near end UE.

The superimposed constellation is based on different power allocations of the far end and the near end UE. In general, the far-end UE allocates more power than the near-end UE, so that the moving of the near-end UE constellation can be implemented. The QPSK modulation constellations of the two superimposed UEs will be superimposed to form an unconventional "16QAM" composite constellation. The composite unconventional "16QAM" is different from the conventional 16QAM constellation. The distribution of constellation points in the composite constellation depends on the power allocation of the two UEs.

Step 702, superimposing signal transmission.

The superimposed signal is modulated into a composite constellation signal that is transmitted on the same time-frequency resource.

Step 703: The near-end UE receives the superposition signal.

Since the MUST is transparent to the far-end UE, this application example considers the reception of the near-end UE.

Step 704: Form a virtual constellation point of the received signal based on the power indication information of the transmitting end. In this application example, the modulation constellation of the transmitting end is: α is a power allocation coefficient less than 1, s ₁ is a signal of a near-end UE, and s ₂ is a signal of a far-end UE. Then the four virtual constellation points are:

It should be noted that, under the premise of knowing the power indication information, the method for forming a virtual constellation point is an implementation method existing in the related art.

Step 705: Perform first-level decoding according to the formed virtual constellation point.

It should be noted that the sphere decoding according to the virtual constellation point is an implementation manner existing in the related art, and details are not described herein.

Step 706: Select a limited quadrant of the received signal based on the first level decoding.

Determining the limited quadrant of the received signal is an implementation method existing in the related art, and details are not described herein.

Step 707: Perform demodulation processing of the received signal based on the selected limited quadrant.

The application example step 707 may include performing demodulation processing on the received signal in the determined limited quadrant by the second level decoding. Specifically, it may include:

Receiving a signal in the selected limited quadrant for second level decoding;

The result of the first stage decoding and the result of the second stage decoding are used as decoding information obtained by demodulation; or, the result of the second stage decoding is used as decoding information obtained by demodulation.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be performed by a program to instruct related hardware (e.g., a processor), which may be stored in a computer readable storage medium, such as a read only memory, disk or optical disk. Wait. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the foregoing embodiment may be implemented in the form of hardware, for example, by implementing an integrated circuit to implement its corresponding function, or may be implemented in the form of a software function module, for example, being executed by a processor and stored in a memory. Programs/instructions to implement their respective functions. The invention is not limited to any specific form of combination of hardware and software.

While the embodiments of the present invention have been described above, the described embodiments are merely for the purpose of understanding the invention and are not intended to limit the invention. Any modification and variation in the form and details of the embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention. The scope defined by the appended claims shall prevail.

Claims (10)

A method for implementing a decoding process, comprising: The near-end user equipment UE selects a limited quadrant of the received signal based on the power indication information; Demodulation processing of the received signal is performed based on the selected limited quadrant. The method according to claim 1, wherein the determining the limited quadrant of the received signal based on the power indication information comprises: Forming a virtual constellation point of the received signal based on power indication information from a transmitting end; Performing a first level of decoding according to the formed virtual constellation points, and selecting a defined quadrant of the received signal. The method according to claim 1 or 2, wherein the power indication information comprises: information determined by a modulation constellation of a transmitting end; The modulation constellation of the transmitting end is: α is a power allocation coefficient less than 1, s ₁ is a signal of a near-end UE, and s ₂ is a signal of a far-end UE. 4. The method of claim 2, wherein the demodulating the received signal based on the selected defined quadrant comprises: Performing a second stage decoding on the received signal in the selected limited quadrant; The result of the first stage decoding and the result of the second stage decoding are used as decoding information obtained by demodulation; or the result of the second stage decoding is used as decoding information obtained by demodulation. A terminal, comprising: a first unit and a second unit; wherein The first unit is configured to: select a limited quadrant of the received signal based on the power indication information; The second unit is configured to: perform demodulation processing of the received signal based on the selected limited quadrant. The terminal according to claim 5, wherein the first unit is specifically configured to: Forming a virtual constellation point of the received signal based on power indication information from a transmitting end; Performing a first level of decoding according to the formed virtual constellation points, and selecting a defined quadrant of the received signal. The terminal according to claim 5 or 6, wherein The power indication information includes: information determined by a modulation constellation of the transmitting end; The modulation constellation of the transmitting end is: α is a power allocation coefficient less than 1, s ₁ is a signal of a near-end UE, and s ₂ is a signal of a far-end UE. The terminal according to claim 5 or 6, wherein the second unit is specifically configured to: Performing a second level decoding on the selected received signal in the defined quadrant; The result of the first stage decoding and the result of the second stage decoding are used as decoding information obtained by demodulation; or the result of the second stage decoding is used as decoding information obtained by demodulation. A computer storage medium storing computer executable instructions for performing the method of implementing the decoding process according to any one of claims 1 to 4. 10. A terminal for implementing a decoding process, comprising: a memory and a processor; wherein the processor is configured to execute program instructions in the memory; Program instructions perform the following operations on the processor read: Selecting a limited quadrant of the received signal based on the power indication information; Demodulation processing of the received signal is performed based on the selected limited quadrant.