CN103391560B - Special burst detection method and device - Google Patents
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Abstract
The invention provides a kind of special burst detection method and device.Export data from the joint-detection of present sub-frame and remove TFCI, SS identifier and TPC identifier, obtain the preprocessed data of present sub-frame; The mean value of every kc symbol in cumulative preprocessed data, obtain the judgement factor, wherein, kc represents the number of empty code channel; Obtain the higher value in the real part absolute value of the mean value of every kc symbol in preprocessed data and imaginary part absolute value, be multiplied by default decision threshold with the accumulated value of above-mentioned higher value, acquisition real part fiducial value; When the imaginary part absolute value of adjudicating the factor is less than the difference of value of real part and the real part fiducial value of adjudicating the factor, determine that present sub-frame is SB.Adopt special burst detection method provided by the invention and device, the detection to the SB that transmitting power reduces can be realized.
Description
Technical Field
The present invention relates to mobile communication technologies, and in particular, to a Special Burst (SB) detection method and apparatus.
Background
With the increasing number of users of time division multiplexing (TD), the problem of co-channel interference is more and more serious due to the finite frequency point resources, and user call drop or poor user experience caused by the problem of co-channel interference becomes a more serious problem in the existing network.
In a TD network, synchronization of the links is maintained by sending SBs when there is no traffic. On the R4 carrier, the time to transmit the SB accounts for approximately 50% of the total talk time. The SB is transmitted more than 90% of the time on the companion channel of a High Speed Packet Access (HSPA) carrier. Since the transmission power of the SB is the same as the transmission power of the data, a larger co-channel interference problem still exists in the network in a non-service scenario.
Currently, in TD network technology, in order to reduce co-channel interference, a method for reducing the transmission power of SB is proposed. After the transmission power of the SB is reduced, the receiver needs to perform a different processing method for the SB from that of the data, and can perform signal-to-noise ratio (SNR) estimation and Transmission Power Control (TPC) according to the SB. However, in the prior art, after receiving a signal, a receiving side does not distinguish whether the signal is data or SB, and the same processing method as the data is directly adopted for the received SB, so that the SB cannot be detected after the SB transmission power is reduced.
Disclosure of Invention
A first aspect of the present invention is to provide an SB detecting method, which is used to solve the defects in the prior art and achieve the detection of SB with reduced transmission power.
Another aspect of the present invention is to provide an SB detecting apparatus, which is used to solve the defects in the prior art and detect an SB with reduced transmission power.
A first aspect of the present invention provides a special burst SB detection method, including:
removing a transport format combination identifier TFCI, a synchronous control SS identifier and a transmission power control TPC identifier from the combined detection output data of the current subframe to obtain the preprocessed data of the current subframe;
accumulating the average value of every kc symbols in the preprocessed data to obtain a decision factor, wherein kc represents the number of virtual code channels;
acquiring a larger value of a real part absolute value and an imaginary part absolute value of an average value of every kc symbols in the preprocessed data, and multiplying a preset decision threshold by an accumulated value of the larger value to acquire a real part reference value;
and when the absolute value of the imaginary part of the decision factor is smaller than the difference between the real part value of the decision factor and the real part reference value, determining that the current subframe is SB.
The method as described above, wherein before removing the TFCI, the SS identifier and the TPC identifier from the joint detection output data of the current subframe and obtaining the pre-processed data of the current subframe, further comprises:
receiving the current subframe;
and performing joint detection on the current subframe to acquire joint detection output data of the current subframe.
The method as described above, wherein the accumulating the average value of every kc symbols in the preprocessed data to obtain the decision factor comprises:
calculating the average value of every kc symbols in the preprocessed data, and taking the average value of every kc symbols as a first average value;
and accumulating all the first average values to obtain a decision factor.
The method as described above, wherein the obtaining a larger value of the real absolute value and the imaginary absolute value of the average value of every kc symbols in the preprocessed data, and multiplying a preset decision threshold by an accumulated value of the larger values to obtain the real reference value comprises:
for each first average value, comparing the real part absolute value and the imaginary part absolute value of the first average value, and taking the larger value of the real part absolute value and the imaginary part absolute value as the representative value of the first average value;
accumulating the representative values of all the first average values to obtain the average amplitude of the constellation diagram;
and multiplying the average amplitude of the constellation diagram by a preset decision threshold to obtain a real part reference value.
The method as described above, further comprising:
and when the absolute value of the imaginary part of the decision factor is greater than or equal to the difference between the real part value of the decision factor and the real part reference value, determining the current subframe as a data frame.
Another aspect of the present invention is to provide a special burst SB detection apparatus, comprising:
a preprocessing unit, configured to remove a transport format combination identifier TFCI, a synchronization control SS identifier, and a transmission power control TPC identifier from joint detection output data of a current subframe, and obtain preprocessed data of the current subframe;
the first calculating unit is used for accumulating the average value of every kc symbols in the preprocessed data to obtain a decision factor, wherein kc represents the number of virtual code channels;
the second calculation unit is used for acquiring a larger value of a real part absolute value and an imaginary part absolute value of an average value of every kc symbols in the preprocessed data, and multiplying a preset judgment threshold by an accumulated value of the larger value to acquire a real part reference value;
and the judging unit is used for determining that the current subframe is SB when the absolute value of the imaginary part of the judging factor is smaller than the difference between the real part value of the judging factor and the real part reference value.
The apparatus as described above, further comprising: a receiving unit, configured to receive the current subframe; and the joint detection unit is used for carrying out joint detection on the current subframe and acquiring joint detection output data of the current subframe.
The apparatus as described above, wherein the first calculating unit is specifically configured to calculate an average value of every kc symbols in the preprocessed data, and accumulate all the first average values by taking the average value of every kc symbols as a first average value, so as to obtain the decision factor.
The apparatus as described above, wherein the second calculating unit is specifically configured to, for each first average value, compare a real part absolute value and an imaginary part absolute value of the first average value, take a larger value of the real part absolute value and the imaginary part absolute value as a representative value of the first average value, accumulate the representative values of all the first average values to obtain a constellation diagram average amplitude, and multiply the constellation diagram average amplitude by a preset decision threshold to obtain a real part reference value.
The apparatus as above, wherein the decision unit is further configured to determine that the current subframe is a data frame when an absolute value of an imaginary part of the decision factor is greater than or equal to a difference between a real part value of the decision factor and the real part reference value.
It can be seen from the above disclosure that, by averaging every kc symbols of the joint detection output data from which the TFCI, SS identifier and TPC identifier are removed and accumulating the averages, a decision factor is obtained, by comparing the real part absolute value and the imaginary part absolute value of the average of every kc symbols, and multiplying the larger value of the values by a preset decision threshold to obtain a real part reference value, and when the imaginary part absolute value of the decision factor is smaller than the difference between the real part value and the real part reference value of the decision factor, it is determined that the current subframe is SB, so that after the transmission power of SB is reduced, the received subframe can be discriminated according to the characteristic that each symbol specific to the SB frame is modulated to 1, and the SB frame is identified therefrom, thereby realizing the detection of SB whose transmission power is reduced.
Drawings
FIG. 1 is a flowchart illustrating an SB detection method according to a first embodiment of the present invention;
FIG. 2 is a flowchart illustrating an SB detection method according to a second embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a subframe according to a second embodiment of the present invention;
fig. 4 is a schematic diagram of an SB detection constellation according to a second embodiment of the present invention;
fig. 5 is a schematic structural diagram of an SB detecting apparatus according to a third embodiment of the present invention.
Detailed Description
Fig. 1 is a flowchart of an SB detection method according to a first embodiment of the present invention. As shown in fig. 1, the method includes the following processes.
Step 101: removing a Transport Format Combination Identifier (TFCI), a synchronization control (SS) identifier and a Transmit Power Control (TPC) identifier from the joint detection output data of the current subframe, and obtaining preprocessed data of the current subframe.
Step 102: and accumulating the average value of every kc symbols in the preprocessed data to obtain a decision factor.
In this step, kc represents the number of virtual code channels.
Step 103: and obtaining the larger value of the real part absolute value and the imaginary part absolute value of the average value of every kc symbols in the preprocessed data, and multiplying the accumulated value of the larger value by a preset judgment threshold to obtain the real part reference value.
Step 104: and when the absolute value of the imaginary part of the decision factor is smaller than the difference between the real part value of the decision factor and the reference value of the real part, determining that the current subframe is SB.
In the first embodiment of the present invention, the mean value of every kc symbols is obtained by performing the combined detection output data from which the TFCI, SS identifier and TPC identifier are removed, and the mean value is accumulated to obtain the decision factor, and the real part absolute value and the imaginary part absolute value of the mean value of every kc symbols are compared, and a larger value of the sum is accumulated and then multiplied by a preset decision threshold to obtain the real part reference value, and when the imaginary part absolute value of the decision factor is smaller than the difference between the real part value and the real part reference value of the decision factor, the current subframe is determined to be SB, so that after the transmission power of SB is reduced, the received subframe can be discriminated according to the characteristic that each symbol specific to the SB frame is modulated to be 1, and the SB frame is identified therefrom, thereby realizing the detection of SB with reduced transmission power.
Fig. 2 is a flowchart of an SB detection method according to a second embodiment of the present invention. As shown in fig. 2, the method includes the following processes.
Step 201: and receiving the current subframe and carrying out joint detection on the current subframe to obtain output data of the joint detection of the current subframe.
In this step, the current subframe is received, and then the current subframe is jointly detected to obtain the output data of the joint detection of the current subframe, and the output data of the joint detection of the current subframe is recorded as D = [ D ]1…d44·kc]. Wherein d isiDenotes the ith symbol, and kc denotes the number of virtual code channels.
Step 202: and removing the TFCI identifier, the SS identifier and the TPC identifier from the output data of the current subframe joint detection to obtain the preprocessed data of the current subframe.
In this step, identifiers such as TFCI, SS, and TPC are removed from the output data of the current subframe joint detection. Fig. 3 is a schematic structural diagram of a subframe according to a second embodiment of the present invention. As shown in fig. 3, in a subframe, data symbols, TFCI, training sequence, SS identifier, TPC identifier, and TFCI are sequentially included, wherein each TFCI includes Ntf symbols, the training sequence includes 144 symbols, the SS identifier includes Nss symbols, the TPC identifier includes Ntpc symbols, and the rest of the subframe is data symbols. Output data D = [ D ] jointly detected according to current subframe1…d44·kc]The data before the training sequence is removed with Ntf TFCI symbols, and the data after the training sequence is removed with Nss SS identifier symbols, Ntpc identifier symbols and Ntf TFCI symbols. After the removing operation is completed, preprocessing data of the current subframe are obtained, and the preprocessing data of the current subframe are recorded as:
D′=[d1,…,d22·kc-Ntf,d22·kc+Ntpc+Nss+Ntf+1,…,d44·kc]
then, the average value of every kc symbols in the preprocessed data is accumulated to obtain a decision factor. Specifically, the method includes the following steps 203 and 204.
Step 203: and calculating the average value of every kc symbols in the preprocessed data, and taking the average value of every kc symbols as the first average value.
In this step, for the convenience of subsequent processing, preprocessed data D' = [ D ] of the current subframe obtained in step 202 is first processed1,…,d22·kc-Ntf,d22·kc+Ntpc+Nss+Ntf+1,…,d44·kc]The subscripts of the symbols are marked as consecutive values in symbol order, and the symbol arranged at the ith position in the symbol sequence is reset as d'iWhere i is 1, …,44 · kc-2 · Ntf-Ntpc-Nss, i.e., the preprocessed data of the current subframe obtained in step 202 is re-expressed as:
D'=[d′1,…,d′44·kc-2·Ntf-Ntpc-Nss]。
then, an average value of every kc symbols in the preprocessed data is calculated. The specific calculation method comprises the following steps:
wherein,represents a lower integer calculation of d'j，combRepresenting the average of every kc symbols in the pre-processed data. With the average of every kc symbols as the first average, i.e. d'j，combRepresenting the jth first average.
Step 204: and accumulating all the first average values to obtain a decision factor.
In this step, the specific calculation method is as follows:
wherein, yjudgeRepresenting a decision factor.
After step 203, obtaining the larger value of the real absolute value and the imaginary absolute value of the first average value, and multiplying the accumulated value of the larger value by a preset decision threshold to obtain the real reference value, specifically, the process includes the following steps 205 to 207, wherein the calculation result of step 203 is needed, so step 205 only needs to be executed after step 203, step 204 and step 205 may be executed at the same time, or step 204 and step 205 may be executed sequentially.
Step 205: for each first average value, comparing the real part absolute value and the imaginary part absolute value of the first average value, and taking the larger value as the representative value of the first average value.
In this step, the real absolute value and the imaginary absolute value of a first average value are compared, and the larger of the real absolute value and the imaginary absolute value is taken as the representative value of the first average value. And processing each first average value by adopting the method to obtain a representative value of each first average value.
Step 206: and accumulating the representative values of all the first average values to obtain the average amplitude of the constellation diagram.
The specific calculation method of step 205 and step 206 can be represented by the following formula
Wherein St represents the constellation mean amplitude, max () represents the maximum value operation, abs () represents the absolute value operation, real () represents the real part operation, and imag () represents the imaginary part operation.
Step 207: and multiplying the average amplitude of the constellation diagram by a preset decision threshold to obtain a real part reference value.
In this step, a threshold is used to represent a decision threshold, which may be preset according to a network environment of practical application or by using a simulation method, where Sherd represents a reference value of a real part, and a specific method for calculating the reference value of the real part is as follows:
Sherd=St·shreshold
step 208: and calculating the absolute value of the imaginary part of the decision factor as an imaginary part comparison value.
In this step, the imaginary absolute value of the decision factor is calculated, and the imaginary absolute value of the decision factor is used as the imaginary comparison value. With P1The imaginary part comparison value is expressed, and the specific method for calculating the imaginary part comparison value is as follows:
P1=abs(imag(yjudge))
wherein abs () represents an absolute value operation, imag () represents an imaginary component operation, yjudgeRepresenting a decision factor.
Step 209: and calculating the difference between the real part value of the decision factor and the real part reference value as a real part comparison value.
In this step, the real part value of the decision factor is calculated, the real part reference value is subtracted from the real part value of the decision factor, and the difference between the real part value of the decision factor and the real part reference value is used as the real part comparison value. With P2The real part comparison value is expressed, and the specific method for calculating the real part comparison value is as follows:
P2=real(yjudge)-Sherd
wherein real () represents the operation of the real part, yjudgeRepresenting the decision factor and Sherd the real reference value.
Step 210: and judging whether the imaginary comparison value is smaller than the real comparison value.
In this step, it is determined whether the imaginary comparison value is smaller than the real comparison value, i.e., P is determined1Whether or not less than P2. If so, i.e. P1<P2Then the current subframe is determined to be SB. Otherwise, i.e. P1≥P2Then the current sub-frame is determined to be a data frame.
Fig. 4 is a schematic diagram of an SB detection constellation according to a second embodiment of the present invention. As shown in fig. 4, ray L1 is shown in the first quadrant having an intersection with the abscissa axis of St · threshold with a slope of 1, and ray L2 is shown in the second quadrant having an intersection with the abscissa axis of St · threshold with a slope of-1. Since the bit pattern of SB is "0 x 5", the special bit pattern of SB makes the modulated data appearThe periodicity, i.e., each symbol of the SB frame, is modulated to 1. And for a data frame, the modulated symbols are located near the origin of the constellation diagram. Therefore, according to the above difference between the SB frame and the data frame, see FIG. 4, if yjudgeLocated in the region formed by the intersection of L1 and L2, i.e. yjudgeLocated in the area indicated by the hatching in fig. 4, the current subframe may be determined to be SB, otherwise, the current subframe is determined to be a data frame. As can be seen from FIG. 4, y in the above-mentioned regionjudgeSatisfy P1<P2Therefore, in this step, P is judged1Whether or not less than P2If P is1<P2Then the current sub-frame is determined to be SB, if P1≥P2Then the current sub-frame is determined to be a data frame.
In the second embodiment of the present invention, operations such as performing joint detection on subframes, removing TFCI, SS identifiers and TPC identifiers from an output result of the joint detection, averaging every kc symbols after the removal operation, accumulating the averaged values, and the like are sequentially performed to obtain a decision factor, and a real part absolute value and an imaginary part absolute value of the averaged value of every kc symbols are compared, and a larger value of the real part absolute value and the imaginary part absolute value is accumulated and then multiplied by a preset decision threshold to obtain a real part reference value, when the imaginary part absolute value of the decision factor is smaller than a difference between the real part value and the real part reference value of the decision factor, a current subframe is determined to be SB, and when the imaginary part absolute value of the decision factor is greater than or equal to a difference between the real part value and the real part reference value of the decision factor, the current. Therefore, after the transmission power of the SB is reduced, the received subframe can be distinguished according to the characteristic that each specific symbol of the SB frame is modulated to be 1, and whether the received subframe belongs to the SB frame or the data frame is identified, so that the detection of the SB with the reduced transmission power is realized.
Fig. 5 is a schematic structural diagram of an SB detecting apparatus according to a third embodiment of the present invention. As shown in fig. 5, the apparatus includes at least: a preprocessing unit 51, a first calculation unit 52, a second calculation unit 53 and a decision unit 54.
The preprocessing unit 51 is configured to remove the TFCI, SS identifier, and TPC identifier from the joint detection output data of the current subframe, and obtain preprocessed data of the current subframe.
The first calculating unit 52 is configured to accumulate an average value of every kc symbols in the preprocessed data to obtain a decision factor, where kc represents the number of the virtual code channels.
The second calculating unit 53 is configured to obtain a larger value of the real absolute value and the imaginary absolute value of the average value of every kc symbols in the preprocessed data, and multiply a preset decision threshold by an accumulated value of the larger value to obtain a real reference value.
The decision unit 54 is configured to determine that the current subframe is SB when the absolute value of the imaginary part of the decision factor is smaller than the difference between the real part value of the decision factor and the real part reference value.
On the basis of the above technical solution, further, the apparatus may further include: a receiving unit 55 and a joint detection unit 56. Wherein the receiving unit 55 is configured to receive the current subframe. The joint detection unit 56 is configured to perform joint detection on the current subframe, and acquire joint detection output data of the current subframe.
On the basis of the foregoing technical solution, specifically, the first calculating unit 52 is specifically configured to calculate an average value of every kc symbols in the preprocessed data, and accumulate all first average values by taking the average value of every kc symbols as a first average value, so as to obtain the decision factor.
On the basis of the foregoing technical solution, specifically, the second calculating unit 53 is specifically configured to compare, for each first average value, a real part absolute value and an imaginary part absolute value of the first average value, use a larger value of the real part absolute value and the imaginary part absolute value as a representative value of the first average value, accumulate the representative values of all the first average values to obtain a constellation diagram average amplitude, and multiply the constellation diagram average amplitude by a preset decision threshold to obtain a real part reference value.
On the basis of the above technical solution, further, the decision unit 54 is further configured to determine that the current subframe is a data frame when the absolute value of the imaginary part of the decision factor is greater than or equal to the difference between the real part value of the decision factor and the real part reference value.
In the third embodiment of the present invention, the preprocessing unit removes the TFCI, SS identifier and TPC identifier in the joint detection output data, averaging every kc symbols after the removal operation through a first computing unit and accumulating the average values to obtain a decision factor, comparing the real part absolute value and the imaginary part absolute value of the average value of every kc symbols by a second calculating unit, accumulating the larger value, and multiplying the larger value by a preset judgment threshold to obtain a real part reference value, determining the current subframe as SB by a judging unit when the imaginary part absolute value of the judgment factor is smaller than the difference between the real part value and the real part reference value of the judgment factor, therefore, after the transmission power of the SB is reduced, according to the characteristic that each symbol special for the SB frame is modulated to be 1, and judging the received sub-frame, and identifying the SB frame from the sub-frame, thereby realizing the detection of the SB with reduced transmitting power.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A special burst SB detection method, comprising:
removing a transport format combination identifier TFCI, a synchronous control SS identifier and a transmission power control TPC identifier from the combined detection output data of the current subframe to obtain the preprocessed data of the current subframe;
accumulating the average value of every kc symbols in the preprocessed data to obtain a decision factor, wherein kc represents the number of virtual code channels;
acquiring a larger value of a real part absolute value and an imaginary part absolute value of an average value of every kc symbols in the preprocessed data, and multiplying a preset decision threshold by an accumulated value of the larger value to acquire a real part reference value;
and when the imaginary absolute value of the decision factor is smaller than the value obtained by subtracting the real reference value from the real value of the decision factor, determining that the current subframe is SB.
2. The method of claim 1, wherein removing a Transport Format Combination Identifier (TFCI), a synchronization control (SS) identifier, and a Transmission Power Control (TPC) identifier from the joint detection output data of the current subframe, further comprises, before obtaining the pre-processed data of the current subframe:
receiving the current subframe;
and performing joint detection on the current subframe to acquire joint detection output data of the current subframe.
3. The method of claim 1, wherein accumulating an average of every kc symbols in the pre-processed data to obtain a decision factor comprises:
calculating the average value of every kc symbols in the preprocessed data, and taking the average value of every kc symbols as a first average value;
and accumulating all the first average values to obtain a decision factor.
4. The method of claim 3, wherein obtaining the larger of the real absolute value and the imaginary absolute value of the average value of every kc symbols in the preprocessed data, and multiplying the accumulated value of the larger by a preset decision threshold to obtain the real reference value comprises:
for each first average value, comparing the real part absolute value and the imaginary part absolute value of the first average value, and taking the larger value of the real part absolute value and the imaginary part absolute value as the representative value of the first average value;
accumulating the representative values of all the first average values to obtain the average amplitude of the constellation diagram;
and multiplying the average amplitude of the constellation diagram by a preset decision threshold to obtain a real part reference value.
5. The method of any one of claims 1 to 4, further comprising:
and when the absolute value of the imaginary part of the decision factor is greater than or equal to the difference between the real part value of the decision factor and the real part reference value, determining the current subframe as a data frame.
6. A special burst SB detection apparatus, comprising:
a preprocessing unit, configured to remove a transport format combination identifier TFCI, a synchronization control SS identifier, and a transmission power control TPC identifier from joint detection output data of a current subframe, and obtain preprocessed data of the current subframe;
the first calculating unit is used for accumulating the average value of every kc symbols in the preprocessed data to obtain a decision factor, wherein kc represents the number of virtual code channels;
the second calculation unit is used for acquiring a larger value of a real part absolute value and an imaginary part absolute value of an average value of every kc symbols in the preprocessed data, and multiplying a preset judgment threshold by an accumulated value of the larger value to acquire a real part reference value;
and the judging unit is used for determining that the current subframe is SB when the imaginary absolute value of the judging factor is smaller than the value obtained by subtracting the real reference value from the real value of the judging factor.
7. The apparatus of claim 6, further comprising:
a receiving unit, configured to receive the current subframe;
and the joint detection unit is used for carrying out joint detection on the current subframe and acquiring joint detection output data of the current subframe.
8. The apparatus according to claim 6, wherein the first calculating unit is specifically configured to calculate an average value of every kc symbols in the preprocessed data, and accumulate all the first average values to obtain the decision factor, with the average value of every kc symbols as the first average value.
9. The apparatus according to claim 8, wherein the second calculating unit is specifically configured to, for each of the first average values, compare the absolute real value and the absolute imaginary value of the first average value, take the larger of the absolute real value and the absolute imaginary value as a representative value of the first average value, accumulate the representative values of all the first average values to obtain a constellation average amplitude, and multiply the constellation average amplitude by a preset decision threshold to obtain a real reference value.
10. The apparatus according to any one of claims 6 to 9, wherein the decision unit is further configured to determine the current subframe as a data frame when an absolute value of an imaginary part of the decision factor is greater than or equal to a difference between a real part value of the decision factor and the real part reference value.
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|---|---|---|---|---|
| CN101106436A (en) * | 2006-07-14 | 2008-01-16 | 大唐移动通信设备有限公司 | A transmission and detection method for special burst and its device |
| CN101312350A (en) * | 2007-05-23 | 2008-11-26 | 联发科技股份有限公司 | Communication system and demodulation method for detecting burst noise and reducing influence thereof |
| WO2009106395A1 (en) * | 2008-02-25 | 2009-09-03 | Cambridge Silicon Radio Limited | Data transmission |
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2012
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101106436A (en) * | 2006-07-14 | 2008-01-16 | 大唐移动通信设备有限公司 | A transmission and detection method for special burst and its device |
| CN101312350A (en) * | 2007-05-23 | 2008-11-26 | 联发科技股份有限公司 | Communication system and demodulation method for detecting burst noise and reducing influence thereof |
| WO2009106395A1 (en) * | 2008-02-25 | 2009-09-03 | Cambridge Silicon Radio Limited | Data transmission |
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