WO2015196568A1

WO2015196568A1 - Retransmission combining method, apparatus and computer storage medium

Info

Publication number: WO2015196568A1
Application number: PCT/CN2014/086230
Authority: WO
Inventors: 虎宾; 王竟宇; 姜春苗
Original assignee: 深圳市中兴微电子技术有限公司
Priority date: 2014-06-26
Filing date: 2014-09-10
Publication date: 2015-12-30
Also published as: CN105227274B; CN105227274A

Abstract

Disclosed is a retransmission combining method, comprising: separating a first system bit contained in data to be decoded and a second system bit contained in retransmission data; according to the first system bit and the second system bit, respectively determining a first occupied ratio corresponding to the first system bit and a second occupied ratio corresponding to the second system bit; and combining data obtained by multiplying the data to be decoded with the first occupied ratio and data obtained by multiplying the retransmission data with the second occupied ratio. Also disclosed at the same time is a retransmission combining apparatus. Also disclosed at the same time is a computer storage medium.

Description

Retransmission combining method, device and computer storage medium

Technical field

The present invention relates to a data transmission technology of a wireless communication system, and in particular, to a retransmission combining method, apparatus, and computer storage medium.

Background technique

The WCDMA communication system is a communication system based on wideband code division multiple access. Different terminal devices can obtain the services of the base station at the same frequency by using different scrambling codes. In the communication process, for a data service with low real-time requirements, the communication mode adopted is that the base station sends data to the terminal device, and the terminal device returns response information to the base station to feedback whether the current reception is successful, and the terminal device does not successfully receive the data. At this time, the base station needs to resend the data. When the communication transmission condition is not ideal, the error rate of the base station transmitting data to the terminal device will be greatly increased, so that the number of times the base station resends the data is increased, thereby greatly increasing the transmission delay and the throughput is low.

In order to solve the above problem, the commonly used technology is the traditional Maximum Ratio Combining (MRC) method, that is, after receiving the retransmitted data, the terminal device retransmits the last received data before decoding. The data is merged, and then the combined data is subjected to maximum ratio combining to improve the decoding success rate.

However, in the specific communication process, it is found that the existing MRC combining method is not effective in improving the hierarchical gain, and the throughput of the communication system is still low.

Summary of the invention

In view of this, the embodiment of the present invention is to provide a retransmission combining method and apparatus, which are used to solve the problem that the existing retransmission combining method is difficult to obtain an ideal diversity gain and the throughput is low.

The technical solution of the embodiment of the present invention is implemented as follows:

A first aspect of the embodiments of the present invention provides a retransmission combining method, including:

Separating the first system bit included in the data to be decoded and the second system bit included in the retransmission data;

Determining, according to the first system bit and the second system bit, a first ratio corresponding to the first system bit and a second ratio corresponding to the second system bit, respectively;

And combining the data obtained by multiplying the data to be decoded by the first ratio with the data obtained by multiplying the retransmission data by the second ratio.

Preferably, the sum of the first ratio and the second ratio is 1.

Preferably, before the separating the data to be decoded includes the first system bit and the second system bit is included in the retransmission data, the method further includes: respectively, the data to be decoded and the retransmitted data Perform an AGC inverse transformation.

Preferably, the determining, by the first system bit and the second system bit, a first ratio of the first system bit and a second ratio corresponding to the second system bit, respectively, including:

Calculating, respectively, a first system bit power corresponding to the first system bit and a second system bit power corresponding to the second system bit;

Calculating the first ratio and the second ratio according to the first system bit power and the second system bit power.

Preferably, the calculating the first system bit power corresponding to the first system bit and the second system bit power corresponding to the second system bit respectively, including:

The first system bit power is calculated by the following formula (1):

Wherein A _i represents the amplitude of the ith systematic bit in the first systematic bit, K represents the total number of systematic bits included in the first systematic bit, and powA represents the total power of the first systematic bit. Calculating the bit power of the second system by using the following formula (2):

Wherein B _i represents the amplitude of the i-th system bit in the second system bit, K represents the total number of systematic bits included in the second system bit, and powB represents the total power of the second system bit. ;

Correspondingly, the calculating the first ratio and the second ratio according to the first system bit power and the second system bit power, including:

The first ratio is calculated by the following formula (3):

Where α represents the first proportion; the second ratio is calculated using the following formula (4):

Where β represents the second ratio.

Calculating, respectively, a sum of a first amplitude corresponding to the first system bit and a sum of a second amplitude corresponding to the second system bit;

Calculating the first ratio and the second ratio according to the sum of the first magnitude and the sum of the second magnitudes.

Preferably, the sum of the first amplitude sum corresponding to the first system bit and the second amplitude value corresponding to the second system bit are respectively calculated, including:

The sum of the first amplitudes is calculated by the following formula (5):

Wherein, A _i represents the amplitude of the i th system bit in the first system bit, K represents the total number of systematic bits included in the first systematic bit, and A represents the sum of the first amplitude values; The sum of the second amplitudes is calculated by the following formula (6):

Wherein B _i represents the amplitude of the i th system bit in the second system bit, K represents the total number of systematic bits included in the second system bit, and B represents the sum of the second amplitude values;

Correspondingly, the calculating the first ratio and the second ratio according to the sum of the first magnitude and the sum of the second magnitudes, including:

The first ratio is calculated by the following formula (7):

Where α represents the first proportion; the second ratio is calculated using equation (4):

Where β represents the second ratio.

A second aspect of the embodiments of the present invention provides a retransmission combining apparatus, including:

a separating module, configured to separate the first system bit included in the data to be decoded and the second system bit included in the retransmitted data;

a determining module, configured to determine, according to the first system bit and the second system bit, a first ratio corresponding to the first system bit and a second ratio corresponding to the second system bit, respectively;

And a merging module configured to combine the data obtained by multiplying the data to be decoded by the first ratio with the data obtained by multiplying the retransmission data by the second ratio.

Preferably, the sum of the first ratio and the second ratio is 1.

Preferably, the device further comprises:

And a transforming module, configured to perform an AGC inverse transform on the to-be-decoded data and the retransmitted data respectively before the second system bit is included in the data to be decoded and the second system bit is included in the data to be decoded.

Preferably, the determining module is configured to separately calculate a first system bit power corresponding to the first system bit and a second system bit power corresponding to the second system bit; according to the first system bit power and The second system bit power calculates the first ratio and the second ratio.

Preferably, the determining module is configured to calculate the first system bit power by using the following formula (9):

Wherein A _i represents the amplitude of the ith systematic bit in the first systematic bit, K represents the total number of systematic bits included in the first systematic bit, and powA represents the total power of the first systematic bit. Calculating the bit power of the second system by using the following formula (10):

Wherein B _i represents the amplitude of the i-th system bit in the second system bit, K represents the total number of systematic bits included in the second system bit, and powB represents the total power of the second system bit. The first ratio is calculated by the following formula (11):

Where α represents the first proportion; the second ratio is calculated using the following formula (12):

Where β represents the second ratio.

Preferably, the determining module is configured to calculate a sum of a first amplitude corresponding to the first system bit and a second amplitude corresponding to the second system bit, respectively, according to the sum and the first amplitude The sum of the second magnitudes calculates the first ratio and the second ratio.

Preferably, the determining module is configured to calculate the sum of the first amplitudes by using the following formula (13):

Wherein, A _i represents the amplitude of the i th system bit in the first system bit, K represents the total number of systematic bits included in the first systematic bit, and A represents the sum of the first amplitude values; The sum of the second amplitudes is calculated by the following formula (14):

Wherein B _i represents the amplitude of the i th system bit in the second system bit, K represents the total number of systematic bits included in the second system bit, and B represents the sum of the second amplitude values; The first ratio is calculated by the following formula (15):

Where α represents the first proportion; the second ratio is calculated using equation (16):

Where β represents the second ratio.

A third aspect of the present invention provides a computer storage medium, where the computer storage medium stores computer executable instructions, and the computer executable instructions are used to execute at least one of the methods of the first aspect of the embodiments of the present invention. One.

The retransmission combining method and apparatus provided by the embodiments of the present invention determine the first toll ratio corresponding to the first system bit and the second proportion corresponding to the second system bit, respectively, and then calculate the to-be-decoded data and the a product of a first ratio and a product of the retransmission data and the second ratio, and then a product of the data to be decoded and the first ratio and a product of the retransmission data and the second ratio The combination is such that the importance of the system bits is fully utilized, and when the combined data is decoded, an ideal diversity gain can be obtained, and the throughput can be improved.

DRAWINGS

1 is a schematic diagram showing a distribution of system bit and parity bit amplitude corresponding to redundancy version 6 of a WCDMA communication system;

2 is a schematic diagram of system bit and parity bit amplitude distribution corresponding to redundancy version 2 of a WCDMA communication system;

FIG. 3 is a schematic flowchart of a retransmission combining method according to an embodiment of the present disclosure;

4 is a schematic flowchart of a detailed processing process of a retransmission combining method according to an embodiment of the present invention;

5 is a schematic diagram of comparing experimental results of a retransmission combining method and a conventional MRC combining method according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a retransmission combining apparatus according to an embodiment of the present invention.

detailed description

The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

In WCDMA communication, the data transmitted by the base station includes system bits and check bits, where the system bits refer to bits occupied by the original data transmitted by the transmitting device, and the check bits are bits added when transmitted by the WCDMA communication system, and used for Verify that the data is correct, and for different versions of the WCDMA communication system, the proportion of parity bits is not the same. As shown in FIG. 1 and FIG. 2, respectively, the system bit and the check bit amplitude distribution diagram corresponding to the redundancy version 6 and the redundancy version 2 of the WCDMA communication system are respectively, and in the data transmission process, the system bits are far more important. Far greater than the importance of the check bits. The existing MRC combining method does not distinguish between system bits and parity bits when merging, so it is difficult to obtain an ideal diversity gain with low throughput. In view of this, the embodiment provides a retransmission combining method and apparatus that can distinguish between system bits and parity bits to improve diversity gain and throughput.

Example

It should be noted that the executor of the embodiment is a user equipment that is a receiving end of data, and the user equipment may be various terminal devices that support WCDMA communication, for example, may be a handheld smart terminal device, including a notebook, a mobile phone, and a tablet computer. Etc.; can also be fixed terminal equipment, including computers. The data described herein may refer to the communication data sent by the base station to the user equipment, including the short-time service data such as the short message service data and the multimedia message service data.

When the communication transmission condition is not ideal, the probability that the data transmitted by the base station is wrong is higher, and the probability that the user equipment decodes the received data is lower. When the user equipment is unsuccessful in decoding, the data to be decoded is saved as the data to be decoded. In addition, the data to be decoded is the soft bit data obtained after the user equipment processes the received data. ,Here The soft bit processing method adopted by the user equipment is prior art, and will not be described in detail herein.

When the data received by the user equipment is incorrect, the user equipment sends a retransmission request to the base station. After receiving the retransmission request, the base station sends data to the user equipment again. This is called retransmission data. After the user equipment receives the retransmission data, After performing soft bit processing on it, it is combined with the data to be decoded received last time, and then the combined data is decoded. For the specific combining method, see below.

FIG. 3 is a schematic flowchart of a retransmission combining method according to an embodiment of the present invention. As shown in FIG. 3, the method includes the following steps:

Step 101: Separating the first system bit included in the to-be-decoded data and the second system bit included in the retransmitted data;

Specifically, in WCDMA communication, the data transmitted by the base station includes system bits and check bits, where the system bits refer to bits occupied by the original data sent by the base station, and the check bits are added when the WCDMA communication system transmits. The bit, when the user equipment receives the data, checks whether the received data is correct according to the check bits stored in the user equipment and the check ratio bits included in the received data. The user equipment separates the systematic bits according to the included identifier by parsing the data to be decoded and retransmitting the data.

In addition, in order to distinguish that the system bit of the unsuccessfully decoded data to be decoded received by the user equipment is different from the system bit included in the retransmitted data received subsequently, the user equipment may receive the last to be translated. The system bits included in the code data are referred to as first system bits, and the system bits included in the retransmission data received by the user equipment are referred to as second system bits, and so on.

Step 102: Determine, according to the first system bit and the second system bit, a first ratio corresponding to the first system bit and a second ratio corresponding to the second system bit, respectively.

In order to distinguish the proportion corresponding to the first system bit from the proportion corresponding to the second system bit, here, the proportion corresponding to the first system bit is referred to as the first proportion, and the second system bit corresponds to the proportion. The ratio is called the second ratio, and so on.

Specifically, the first ratio and the second ratio are both decimals. In addition, in order to enable the user equipment to combine the data to be decoded and the retransmission data, a real value closer to the systematic bit can be obtained. It is required to require that the sum of the first ratio and the second ratio be one.

Further, determining, according to the first system bit and the second system bit, a first ratio corresponding to the first system bit and a second ratio corresponding to the second system bit, respectively, may adopt the following Either of the two methods is implemented.

method one:

First, calculating, respectively, a first system bit power corresponding to the first system bit and a second system bit power corresponding to the second system bit;

Specifically, the first system bit power can be calculated by using the following formula (1):

Wherein B _i represents the amplitude of the i-th system bit in the second system bit, K represents the total number of systematic bits included in the second system bit, and powB represents the total power of the second system bit. .

Then, calculating the first ratio and the second ratio according to the first system bit power and the second system bit power.

Specifically, after obtaining the first system bit power and the second system bit power, the first ratio can be calculated by using the following formula (3):

Where β represents the second ratio.

Method Two:

First, respectively calculating a sum of a first amplitude corresponding to the first systematic bit and a sum of a second amplitude corresponding to the second systematic bit;

Specifically, the sum of the first amplitudes can be calculated by using the following formula (5):

Wherein, B _i represents the amplitude of the i-th system bit in the second system bit, K represents the total number of systematic bits included in the second system bit, and B represents the sum of the second amplitude values.

Then, the first ratio and the second ratio are calculated according to the sum of the first magnitude and the sum of the second magnitudes.

Specifically, after obtaining the sum of the first amplitude and the sum of the second amplitudes, the first ratio can be calculated by using the following formula (7):

Where α represents the first proportion; the second ratio is calculated using equation (8):

Where β represents the second ratio.

Step 103: Combine the data obtained by multiplying the data to be decoded by the first ratio and the data obtained by multiplying the retransmission data by the second ratio.

Specifically, if the method used in determining the first proportion of the first system bit and the second ratio corresponding to the second system bit is the first method, the method uses the following formula ( 17) combining the data obtained by multiplying the data to be decoded by the first ratio with the data obtained by multiplying the retransmission data by the second ratio:

among them,

Represents data to be decoded,

Indicates that the data is retransmitted, and merge indicates that the data is merged. If the method used in step 103 is to determine the first ratio of the first system bit and the second ratio corresponding to the second system bit, the method uses the following formula (18). The data obtained by multiplying the data to be decoded by the first ratio is combined with the data obtained by multiplying the retransmission data by the second ratio:

In addition, after obtaining the merged data, the user equipment decodes the merged data, so that the decoding success rate can be greatly improved. Specifically, since the data to be decoded and the retransmitted data are all based on soft bits, the merged data is also based on soft bits, and can be decoded by a threshold decision method, that is, if the combined data is greater than a decision threshold such as 0.5, It translates to 1, and if the merged data is less than the decision threshold, such as 0.5, it is translated to zero. The above method is only used for illustration. In practical applications, other decoding methods may also be used, which are not specifically limited herein.

In addition, the data to be decoded and the retransmitted data used in this embodiment are data processed by Automatic Gain Control (AGC), and are separated in order to make the processed data closer to the original data. Before the systematic bits, the AGC inverse transform is performed on the data to be decoded and the retransmitted data, respectively. The specific inverse transform method depends on the AGC transform used in the previous processing of the original data, and is not specifically limited herein.

FIG. 4 is a schematic diagram of a detailed processing flow of a retransmission combining method according to an embodiment of the present invention. As shown in FIG. 4, the method includes the following steps:

Step 201: Save the previously received unsuccessfully decoded data to be decoded.

Step 202: Receive retransmission data.

Step 203: Perform an AGC inverse transform on the to-be-decoded data and the retransmitted data, respectively.

Step 204, separating the first system bit included in the data to be decoded and the second system bit included in the retransmission data;

It should be noted that the data to be decoded and the retransmitted data in this step refer to the data after the inverse AGC conversion. That is to say, the first system bits in this step and the subsequent steps are all separated from the data to be decoded after the inverse AGC conversion, and the second system bits refer to the inverse of the AGC. Separated from the retransmission data. Therefore, both the first systematic bit and the second systematic bit in the subsequent steps refer to systematic bits after inverse transformation by AGC.

Step 205: Calculate a first system bit power corresponding to the first system bit and a second system bit power corresponding to the second system bit, respectively.

Specifically, the first system bit power can be calculated by using the above formula (1), but the parameters therein are all changed, wherein A _i represents the i-th system bit in the first system bit after the inverse AGC transformation. The amplitude, K represents the total number of systematic bits included in the first systematic bit, and powA represents the total power of the first systematic bit after the inverse of the AGC; the second is calculated by using the above formula (2) System bit power, but the parameters therein also vary, where B _i represents the amplitude of the i-th system bit in the second system bit after the AGC inverse transform, and K represents the second system bit included in the The total number of systematic bits, powB represents the total power of the second systematic bit after the inverse of the AGC.

Step 206: Calculate the first ratio and the second ratio according to the first system bit power and the second system bit power.

Specifically, the first ratio and the second ratio may be calculated by using the above formula (3) and formula (4). For details, refer to the related steps in the embodiment described in FIG. 3, and details are not described herein.

Step 207: Combine the data obtained by multiplying the data to be decoded by the first ratio and the data obtained by multiplying the retransmission data by the second ratio to obtain combined data.

Specifically, in this step, the data obtained by multiplying the data to be decoded by the first ratio and the data obtained by multiplying the retransmission data by the second ratio may be performed by using the above formula (9). Merging, but the parameters are changed, among them,

Representing data to be decoded after inverse transformation by AGC,

Represents retransmission data after inverse transformation by AGC, and merge indicates merged data.

Step 208, decoding the merged data.

It has been experimentally verified that the above embodiment of the present invention can greatly improve the throughput in the WCDMA communication system compared to the conventional Maximum Ratio Combining (MRC) combination. The experimental environment is a WCDMA communication system, and the environment configuration is HSET8 64QAM. Using a 30 km/s single-path channel, the first transmission of data uses redundancy version 6, and the retransmission data uses redundancy version 2, the experimental results, as shown in Figure 5.

In order to implement the retransmission combining method provided by the foregoing embodiment of the present invention, the embodiment of the present invention further provides a retransmission combining device, the technical principle thereof and the technical effect generated and the retransmission combining method provided by the foregoing embodiment of the present invention. Similar, no more details here. The composition of the retransmission combining apparatus provided by the embodiment of the present invention is described in detail below.

FIG. 6 is a schematic structural diagram of a retransmission combining apparatus according to an embodiment of the present invention. As shown in FIG. 6, the method includes: a separation module 11, a determining module 12, and a merging module 13. among them,

The separating module 11 is configured to separate, the data to be decoded includes a first system bit, and the retransmitted data includes a second system bit;

The determining module 12 is configured to determine, according to the first system bit and the second system bit, a first ratio corresponding to the first system bit and a second ratio corresponding to the second system bit, respectively;

The merging module 13 is configured to combine the data obtained by multiplying the data to be decoded by the first ratio and the data obtained by multiplying the retransmission data by the second ratio.

The above retransmission combining means preferably includes a saving module 15 configured to hold the previously received unsuccessfully decoded data to be decoded.

The retransmission combining device preferably includes a receiving module 16 configured to receive retransmitted data.

Preferably, the sum of the first ratio and the second ratio is 1.

The retransmission combining apparatus preferably includes a transforming module 14 configured to separately wait for the first system bit included in the data to be decoded and the second system bit included in the retransmitted data The decoded data and the retransmitted data are subjected to an AGC inverse transform.

Preferably, the determining module 12 is configured to calculate a first system bit power corresponding to the first system bit and a second system bit power corresponding to the second system bit, respectively, according to the first system bit power and The second system bit power calculates the first ratio and the second ratio.

Preferably, the determining module 12 is configured to calculate the first system bit power by using the following formula (9):

Where β represents the second ratio.

Preferably, the determining module 12 is configured to calculate a sum of a first amplitude corresponding to the first system bit and a second amplitude corresponding to the second system bit, respectively, according to the sum of the first amplitudes and The sum of the second magnitudes calculates the first ratio and the second ratio.

Preferably, the determining module 12 is configured to calculate the sum of the first amplitudes by using the following formula (13):

Where β represents the second ratio.

The retransmission combining means preferably includes a decoding module 17 configured to decode the merged data.

In a practical application, the separation module 11, the determination module 12, the merging module 13 and the transformation module 14 may be a central processing unit (CPU), a microprocessor (MPU), a digital signal located in a user equipment. a processor (DSP), or a field programmable gate array (FPGA) implementation; the save module 15 may be implemented by a memory located in a user equipment; the receiving module 16 may be implemented by a receiver located in the user equipment; Module 17 can be implemented by a decoder located in the user equipment.

The embodiment of the present invention further describes a computer storage medium, wherein the computer storage medium stores computer executable instructions, and the computer executable instructions are used in at least one of the methods in the embodiments of the present invention, such as performing The method shown in Figure 3.

The computer storage medium may be a medium that can store program codes, such as a mobile storage device, a read-only memory (ROM), a magnetic disk, or an optical disk, and is preferably a non-transitory storage medium.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Modifications made in accordance with the principles of the invention are understood to fall within the scope of the invention.

Claims

A retransmission combining method, the method comprising:

Separating the first system bit included in the data to be decoded and the second system bit included in the retransmission data;

Determining, according to the first system bit and the second system bit, a first ratio corresponding to the first system bit and a second ratio corresponding to the second system bit, respectively;

And combining the data obtained by multiplying the data to be decoded by the first ratio with the data obtained by multiplying the retransmission data by the second ratio.
The method of claim 1 wherein the sum of the first ratio and the second ratio is one.
The method according to claim 1 or 2, wherein before the separating the data to be decoded includes the first system bit and the second system bit is included in the retransmission data, the method further comprises: respectively The data to be decoded and the retransmitted data are inversely transformed by AGC.
The method according to claim 1 or 2, wherein said determining a first proportion of said first systematic bit and said second systematic bit according to said first systematic bit and said second systematic bit, respectively The corresponding second ratio, including:

Calculating, respectively, a first system bit power corresponding to the first system bit and a second system bit power corresponding to the second system bit;

Calculating the first ratio and the second ratio according to the first system bit power and the second system bit power.
The method according to claim 4, wherein the calculating the first system bit power corresponding to the first system bit and the second system bit power corresponding to the second system bit respectively comprises:

The first system bit power is calculated by the following formula (1):

Wherein A i represents the amplitude of the ith systematic bit in the first systematic bit, K represents the total number of systematic bits included in the first systematic bit, and powA represents the total power of the first systematic bit. Calculating the bit power of the second system by using the following formula (2):

Wherein B i represents the amplitude of the i-th system bit in the second system bit, K represents the total number of systematic bits included in the second system bit, and powB represents the total power of the second system bit. ;

Correspondingly, the calculating the first ratio and the second ratio according to the first system bit power and the second system bit power, including:

The first ratio is calculated by the following formula (3):

Where α represents the first proportion; the second ratio is calculated using the following formula (4):

Where β represents the second ratio.
The method according to claim 1 or 2, wherein said determining a first proportion of said first systematic bit and said second systematic bit according to said first systematic bit and said second systematic bit, respectively The corresponding second ratio, including:

Calculating, respectively, a sum of a first amplitude corresponding to the first system bit and a sum of a second amplitude corresponding to the second system bit;

Calculating the first ratio and the second ratio according to the sum of the first magnitude and the sum of the second magnitudes.
The method of claim 6, wherein the calculating the sum of the first magnitude corresponding to the first systematic bit and the sum of the second magnitude corresponding to the second systematic bit respectively comprises:

The sum of the first amplitudes is calculated by the following formula (5):

Wherein, A i represents the amplitude of the i th system bit in the first system bit, K represents the total number of systematic bits included in the first systematic bit, and A represents the sum of the first amplitude values; The sum of the second amplitudes is calculated by the following formula (6):

Wherein, B i represents the amplitude of the i-th system bit in the second system bit, K represents the total number of systematic bits included in the second system bit, and B represents the sum of the second amplitude values;

Correspondingly, the calculating the first ratio and the second ratio according to the sum of the first magnitude and the sum of the second magnitudes, including:

The first ratio is calculated by the following formula (7):

Where α represents the first proportion; the second ratio is calculated using equation (4):

Where β represents the second ratio.
A retransmission combining device, the device comprising:

a separating module, configured to separate the first system bit included in the data to be decoded and the second system bit included in the retransmitted data;

a determining module, configured to determine, according to the first system bit and the second system bit, a first ratio corresponding to the first system bit and a second ratio corresponding to the second system bit, respectively;

And a merging module configured to combine the data obtained by multiplying the data to be decoded by the first ratio with the data obtained by multiplying the retransmission data by the second ratio.
The apparatus according to claim 8, wherein a sum of said first ratio and said second ratio is one.
The device according to claim 8 or 9, wherein the device further comprises:

And a transforming module, configured to perform an AGC inverse transform on the to-be-decoded data and the retransmitted data respectively before the second system bit is included in the data to be decoded and the second system bit is included in the data to be decoded.
The apparatus according to claim 8 or 9, wherein the determining module is configured to separately calculate a first system bit power corresponding to the first system bit and a second system bit power corresponding to the second system bit; Calculating the first ratio and the second ratio according to the first system bit power and the second system bit power.
The apparatus of claim 11, wherein the determining module is configured to calculate the first system bit power using the following formula (9):

Wherein A i represents the amplitude of the ith systematic bit in the first systematic bit, K represents the total number of systematic bits included in the first systematic bit, and powA represents the total power of the first systematic bit. Calculating the bit power of the second system by using the following formula (10):

Wherein B i represents the amplitude of the i-th system bit in the second system bit, K represents the total number of systematic bits included in the second system bit, and powB represents the total power of the second system bit. The first ratio is calculated by the following formula (11):

Where α represents the first proportion; the second ratio is calculated using the following formula (12):

Where β represents the second ratio.
The device according to claim 8 or 9, wherein the determining module is configured to calculate a sum of a first amplitude corresponding to the first systematic bit and a second amplitude corresponding to the second systematic bit, respectively; Calculating the first ratio and the second ratio according to the sum of the first magnitude and the sum of the second magnitudes.
The apparatus of claim 13, wherein the determining module is configured to calculate the sum of the first magnitudes using the following formula (13):

Wherein, A i represents the amplitude of the i th system bit in the first system bit, K represents the total number of systematic bits included in the first systematic bit, and A represents the sum of the first amplitude values; The sum of the second amplitudes is calculated by the following formula (14):

Wherein B i represents the amplitude of the i th system bit in the second system bit, K represents the total number of systematic bits included in the second system bit, and B represents the sum of the second amplitude values; The first ratio is calculated by the following formula (15):

Where α represents the first proportion; the second ratio is calculated using equation (16):

Where β represents the second ratio.
A computer storage medium storing computer executable in the computer storage medium A line of instructions for performing at least one of the methods of claims 1-7.