CN108833059B

CN108833059B - Novel intelligent receiving system

Info

Publication number: CN108833059B
Application number: CN201810709963.7A
Authority: CN
Inventors: 刘亿亮; 马雅男; 王丽
Original assignee: CHENGDU GUOHENG SPACE TECHNOLOGY ENGINEERING CO LTD
Current assignee: Chengdu Guoheng Space Technology Engineering Co.,Ltd.
Priority date: 2018-07-02
Filing date: 2018-07-02
Publication date: 2021-06-11
Anticipated expiration: 2038-07-02
Also published as: CN108833059A

Abstract

Disclosed herein is a novel intelligent receiving system, comprising: the system comprises a signal processing module, an intelligent control module, an FEC hard judgment module, a hard judgment module, an FEC soft judgment module and a CRC check module; the signal processing module is used for carrying out signal preprocessing on communication input data; and the processed data enters an intelligent control module, the intelligent control module analyzes the data and performs grading processing according to the error condition of the data, and the grading processing uses FEC hard judgment, FEC soft judgment and hard judgment for processing. The invention solves the problem that a single receiving end decoding scheme is used under different channel conditions in a communication system.

Description

Novel intelligent receiving system

Technical Field

The present invention relates to the field of communications technologies, and in particular, to channel decoding in a communication system.

Background

Since the establishment of the shannon information theory, the channel coding and decoding technology has been developed greatly. In the field of mobile communications, such as UMTS of the third generation partnership project 3GPP organization, channel coding has become one of the indispensable key technologies; the range involved in coding and decoding is wide, but from the field of mobile communication represented by UMTS and LTE, several types of codes which are most widely researched and applied are mainly forward error correction codes of a physical layer, including classical algebraic coding, convolutional codes, Turbo codes based on iterative techniques, low-density check codes and the like. In the forward error correction code, Turbo codes are widely used for data service coding of a mobile communication system; the convolution code is used for circuit domain voice and control channel coding; the algebraic code is mainly linear block short code generated by Reed-Muller code extension and is used for short control signaling coding with information length of several bits to dozens of bits; the low-density check code is applied to systems such as microwave transmission and the like due to excellent high-code-rate performance and extremely low error floor. With the development of the quartic optimization technology, joint source-channel coding and decoding becomes a way to improve the overall performance, and particularly, a great deal of research is carried out on the aspect of improving the audio and video quality of wireless communication. However, the high-performance coding and decoding scheme means that more resources and power consumption are consumed, so how to reasonably select a coding and decoding mode and autonomously select a scheme with low power consumption and high performance in different channel environments is really urgently needed. In the prior art, a communication system completely adopts a single receiving end decoding scheme under the condition of different channels, however, the system usually sets the decoding scheme according to the worst channel, so when the channel quality is better, unnecessary waste of resources and power consumption is brought.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a novel intelligent receiving system which can solve the problem that a single receiving end decoding scheme is used under different channel conditions in a communication system.

The purpose of the invention is realized by the following technical scheme:

a novel intelligent receiving system, comprising: the system comprises a signal processing module, an intelligent control module, an FEC hard judgment module, a hard judgment module, an FEC soft judgment module and a CRC check module; the signal processing module is used for carrying out signal preprocessing on communication input data; and the processed data enters an intelligent control module, the intelligent control module analyzes the data and performs grading processing according to the error condition of the data, and the grading processing uses FEC hard judgment, FEC soft judgment and hard judgment for processing.

Further, the grading processing according to the data error condition further includes: 1) if the errors are very few and the requirement of the demodulation threshold is met, transmitting the data to the hard decision module; 2) if the errors are less, but the errors do not reach the demodulation threshold required by the system, but the errors are within the FEC hard judgment threshold, transmitting the data to the FEC hard judgment module, and giving the number of loop iterations for executing the FEC hard judgment according to the distance between the error codes of the processed data and the demodulation threshold; 3) if more errors exceed an FEC hard judgment threshold but are within the FEC soft judgment threshold, transmitting the data to an FEC soft judgment module, and giving the number of loop iterations for executing the FEC soft judgment according to the size of the error code distance demodulation threshold of the processed data; 4) and if the error exceeds the FEC soft judgment threshold or the self-defined threshold, requesting retransmission and stopping decoding.

Furthermore, the hard decision module is responsible for making a hard decision on the received data, where the hard decision includes defining a decision threshold, and if the decision threshold is larger than the decision threshold, the hard decision is judged to be a high level, and if the decision threshold is smaller than the decision threshold, the hard decision is judged to be a low level.

Further, the FEC hard decision module performs hard decision on input data, performs simple quantization according to an analog signal output by the demodulator, and directly converts a quantization result into a binary output result through a decoding and error correction mechanism.

Further, the FEC soft decision module performs soft decision with a greater quantization accuracy on the input data.

Further, the intelligent control module further executes the following steps: and performing CRC or PCC (parity check) and other checks on the data after passing through the hard decision module, the FEC hard decision module and the FEC soft decision module, inputting a check result into the intelligent control module, outputting the data if the check result meets a demodulation threshold, checking whether the CRC check result is in a hard decision FEC threshold or a soft decision threshold if the CRC check result does not meet the threshold requirement, sending the data into the FEC hard decision module for hard decision FEC decoding if the CRC check result is in the hard decision threshold, sending the data into the FEC soft decision module if the CRC check result exceeds the hard decision threshold and outputting a signal after decoding if the CRC check result exceeds the soft decision threshold.

The invention also discloses a novel intelligent receiving method, which comprises the following steps:

carrying out signal preprocessing on communication input data; analyzing the processed data, and performing grading processing according to the error condition of the data, wherein the grading processing uses FEC hard judgment, FEC soft judgment and hard judgment for processing.

Further, the performing the hierarchical processing according to the data error condition further includes: 1) if the errors are very few and the requirements of the demodulation threshold are met, carrying out hard decision on the data; 2) if the error is less, but the error does not reach the demodulation threshold required by the system, but the error is within the FEC hard judgment threshold, performing FEC hard judgment on the data, and giving the number of loop iteration times for executing the FEC hard judgment according to the distance between the error code of the processed data and the demodulation threshold; 3) if more errors exceed the FEC hard judgment threshold but are within the FEC soft judgment threshold, performing FEC soft judgment on the data, and giving the number of loop iterations for executing the FEC soft judgment according to the size of the error code distance demodulation threshold of the processed data; 4) and if the error exceeds the FEC soft judgment threshold or the self-defined threshold, requesting retransmission and stopping decoding.

Further, the hard decision includes defining a decision threshold, and if the decision threshold is larger than the decision threshold, the hard decision is judged to be a high level, and if the decision threshold is smaller than the decision threshold, the hard decision is judged to be a low level; the FEC hard judgment comprises hard judgment on input data, simple quantization is carried out according to an analog signal output by a demodulator, and a quantization result is directly converted into a binary output result through a decoding and error correction mechanism; the FEC soft decision includes soft decision with more quantization accuracy for the input data.

Further, the method further comprises the steps of carrying out CRC or PCC and other check on the data after passing through the hard decision module, the FEC hard decision module and the FEC soft decision module, if the check result meets the demodulation threshold, outputting the data, if the check result does not meet the threshold requirement, checking whether the CRC check result is in the hard decision FEC threshold or the soft decision threshold, if the check result is in the hard decision FEC threshold, carrying out hard decision FEC decoding on the data, if the check result is in the hard decision FEC threshold or the soft decision threshold, and if the check result is in the hard decision FEC threshold, carrying out FEC soft decision on the data, and outputting the decoded signal.

The invention has the beneficial effects that: aiming at different communication channel conditions, such as the condition that signal degradation does not reach the most serious condition, the hard decision and the soft decision modes of FEC can be flexibly adjusted and selected through intelligent control, so that unnecessary calculation steps can be saved to a certain extent according to actual conditions, time, resources and power consumption are saved, and the requirements of the current actual system are very met.

Drawings

FIG. 1 is a block diagram of system modules according to one embodiment.

Fig. 2-3 are graphs of compensated data phases and corresponding raw data for input energy =5db, according to one embodiment.

Fig. 4-5 are graphs of compensated data phases and corresponding raw data for an input energy =10db, according to one embodiment.

Detailed Description

In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings.

In one embodiment, a smart receiving system, comprising: the system comprises a signal processing module 100, an intelligent control module 200, an FEC hard judgment module 301, a hard judgment module 302, an FEC soft judgment module 303 and a CRC check module; the signal processing module 100 is configured to perform signal preprocessing on communication input data; the processed data enters an intelligent control module 200, the intelligent control module 200 analyzes the data, and performs classification processing according to the error condition of the data, wherein the classification processing uses FEC hard judgment, FEC soft judgment and hard judgment for processing.

Further, the grading processing according to the data error condition further includes: 1) if the error is very few and the requirement of the demodulation threshold is met, the data is transmitted to the hard decision module 302; 2) if the error is less, but the error does not reach the demodulation threshold required by the system, but is within the FEC hard decision threshold, the data is transmitted to the FEC hard decision module 301, and the number of loop iterations for executing the FEC hard decision is given according to the distance between the error code of the processed data and the demodulation threshold; 3) if more errors exceed the FEC hard decision threshold but are within the FEC soft decision threshold, transmitting the data to the FEC soft decision module 303, and giving the number of loop iterations for executing the FEC soft decision according to the size of the error code distance demodulation threshold of the processed data; 4) and if the error exceeds the FEC soft judgment threshold or the self-defined threshold, requesting retransmission and stopping decoding.

Further, the hard decision module 302 is responsible for making a hard decision on the received data, where the hard decision includes defining a decision threshold, and if the decision threshold is larger than the decision threshold, the received data is determined as a high level, and if the decision threshold is smaller than the decision threshold, the received data is determined as a low level.

Further, the FEC hard decision module 301 performs hard decision on input data, performs simple quantization according to the analog signal output by the demodulator, and directly converts the quantization result into a binary output result through a decoding and error correction mechanism.

Further, the FEC soft decision module 303 performs soft decision with a greater quantization accuracy on the input data.

Further, the intelligent control module 200 further performs the following steps: the data after passing through the hard decision module, the FEC hard decision module and the FEC soft decision module 303 are checked through a CRC module 400, the check result is input to the intelligent control module 200, if the demodulation threshold is met, the data is output, if the threshold requirement is not met, whether the CRC check result is within the hard decision FEC threshold or the soft decision threshold is checked, if the CRC check result is within the hard decision FEC threshold, the data is sent to the FEC hard decision module 301 for hard decision FEC decoding, if the demodulation threshold exceeds the hard decision threshold, the data is sent to the FEC soft decision module 303, and the decoded signal is output.

In another embodiment, when the loaded signal energy/white gaussian noise energy =5dB, the receiver receives and processes the received data, where the processing processes include filtering, clock synchronization, data synchronization, frequency offset estimation, and equalization, and after these processes, part of the damage in the data transmission process is compensated, and the compensated data phase and the corresponding original data are as shown in fig. 2.

At this time, data enters an intelligent control module, because a Turbo code is used, and a CRC check function is used, the data is subjected to CRC check, and we find that BER =1e-2 at this time does not meet demodulation performance indexes of the system, BER is less than 1e-5, but within the requirement of an FEC soft decision threshold, that is, the soft decision BER threshold =3e-2, and therefore the data is sent to an FEC soft decision module 303.

The data output by the FEC soft decision is compared with the original data, and the result is the same, as shown in fig. 3. After the data enters the CRC checker 400, all correct check results are sent to the intelligent control module 200, which controls FEC soft decision output.

In another embodiment, when the signal energy/white gaussian noise energy loaded by the receiver =10dB, the receiver receives and processes the received data, where the processing process includes filtering, clock synchronization, data synchronization, frequency offset estimation, and equalization, and after these processes, part of the damage in the data transmission process is compensated, and the compensated data and the corresponding original data are as shown in fig. 4.

At this time, data enters an intelligent control module to perform CRC, and when the data is found to be correct, BER =0, the data meets the demodulation performance index of the system, and BER is less than 1e-5, so that the data is sent to a hard decision module 302.

The data output through hard decision is compared with the original data, and the result is the same as shown in fig. 5. After the data enters the CRC checker, all correct check results are sent to the intelligent control module 200, which controls the hard decision output.

It should be noted that, for simplicity of description, the above-mentioned embodiments of the method are described as a series of acts or combinations, but those skilled in the art should understand that the present application is not limited by the order of acts described, as some steps may be performed in other orders or simultaneously according to the present application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and elements referred to are not necessarily required in this application.

In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a ROM, a RAM, etc.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.

Claims

1. A novel intelligent receiving system is characterized in that: the system comprises a signal processing module, an intelligent control module, an FEC hard judgment module, a hard judgment module, an FEC soft judgment module and a CRC check module; the signal processing module is used for carrying out signal preprocessing on communication input data; the processed data enters an intelligent control module, the intelligent control module analyzes the data and performs grading processing according to the error condition of the data, and the grading processing uses FEC hard judgment, FEC soft judgment and hard judgment for processing; the grading processing according to the data error condition further comprises: 1) if the error has reached the requirement of the demodulation threshold, transmitting the data to the hard decision module; 2) if the error does not reach the demodulation threshold required by the system but is within the FEC hard judgment threshold, transmitting the data to the FEC hard judgment module, and giving the number of loop iterations for executing the FEC hard judgment according to the distance between the error code of the processed data and the demodulation threshold; 3) if the error exceeds an FEC hard judgment threshold but is within the FEC soft judgment threshold, transmitting the data to an FEC soft judgment module, and giving the number of loop iteration times for executing the FEC soft judgment according to the size of the error code distance demodulation threshold of the processed data; 4) and if the error exceeds the FEC soft judgment threshold or the self-defined threshold, requesting retransmission and stopping decoding.

2. A novel intelligent receiving system as recited in claim 1, wherein said hard decision module is responsible for making hard decisions on the received data, said hard decisions including defining decision thresholds above which a high level is determined and below which a low level is determined.

3. A novel intelligent receiving system, as recited in claim 1, wherein said FEC hard decision module performs hard decision on the input data, performs simple quantization based on the analog signal outputted from the demodulator, and directly converts the quantization result into binary output result through decoding and error correction mechanism.

4. A novel intelligent receiving system, as recited in claim 1, wherein said FEC soft decision module performs soft decision with more quantitative accuracy on the input data.

5. A novel intelligent receiving system as claimed in claim 1, wherein said intelligent control module further performs the steps of: and performing CRC (cyclic redundancy check) or PCC (policy and charging control) check on the data which is subjected to the hard decision module, the FEC hard decision module and the FEC soft decision module, inputting a check result into the intelligent control module, outputting the data if the check result meets a demodulation threshold, checking whether the CRC check result is in the hard decision FEC threshold or the soft decision threshold if the check result does not meet the threshold requirement, sending the data into the FEC hard decision module for hard decision FEC decoding if the check result is in the hard decision threshold, sending the data into the FEC soft decision module if the check result exceeds the hard decision threshold and outputting a signal after decoding.

6. A novel intelligent receiving method, comprising:

carrying out signal preprocessing on communication input data; analyzing the processed data, and performing grading processing according to the error condition of the data, wherein the grading processing uses FEC hard judgment, FEC soft judgment and hard judgment for processing;

the grading processing according to the data error condition further comprises: 1) if the error reaches the requirement of the demodulation threshold, carrying out hard decision on the data; 2) if the error does not reach the demodulation threshold required by the system, but is within the FEC hard judgment threshold, performing FEC hard judgment on the data, and giving the number of loop iterations for executing the FEC hard judgment according to the distance between the error code of the processed data and the demodulation threshold; 3) if the error exceeds an FEC hard judgment threshold but is within the FEC soft judgment threshold, performing FEC soft judgment on the data, and giving the number of loop iterations for executing the FEC soft judgment according to the size of the error code distance demodulation threshold of the processed data; 4) and if the error exceeds the FEC soft judgment threshold or the self-defined threshold, requesting retransmission and stopping decoding.

7. A novel intelligent receiving method as claimed in claim 6, wherein said hard decision includes defining a decision threshold, greater than said decision threshold determining a high level, less than said decision threshold determining a low level; the FEC hard judgment comprises hard judgment on input data, simple quantization is carried out according to an analog signal output by a demodulator, and a quantization result is directly converted into a binary output result through a decoding and error correction mechanism; the FEC soft decision includes soft decision with more quantization accuracy for the input data.

8. A novel intelligent receiving method as claimed in claim 6, further comprising:

and performing CRC (cyclic redundancy check) or PCC (policy and charging control) verification on the data after passing through the hard judgment module, the FEC hard judgment module and the FEC soft judgment module, outputting the data if the verification result meets the demodulation threshold, checking whether the CRC verification result is in the hard judgment FEC threshold or the soft judgment threshold if the verification result does not meet the threshold requirement, performing hard judgment FEC decoding on the data if the verification result is in the hard judgment FEC threshold, performing FEC soft judgment on the data if the verification result exceeds the hard judgment threshold and is in the soft judgment threshold, and outputting the decoded signal.