Method for reducing complexity of continuous phase modulation receiver

A phase modulation and phase modulation signal technology, applied in the field of communication, can solve the problems of complex CPM signal processing, large receiver storage capacity, high computational complexity, etc., to achieve the effect of ensuring realizability, reducing calculation amount, and reducing complexity

Inactive Publication Date: 2011-06-29
NO 50 RES INST OF CHINA ELECTRONICS TECH GRP
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Problems solved by technology

In this way, the storage capacity of the receiver is large and the computational complexity is high
It can be seen from the formula (5) that the receiving end needs to have p·M L A matched filter to calculate the branch metric, using the above parameters a total of 1536 filters, which makes the receiver quite complex
[0018] It can be seen that although continuous phase modulation has many advantages, the processing of CPM signals with high spectrum efficiency is very complicated, so further improvement is needed in reducing the complexity of CPM receivers

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  • Method for reducing complexity of continuous phase modulation receiver
  • Method for reducing complexity of continuous phase modulation receiver
  • Method for reducing complexity of continuous phase modulation receiver

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[0047] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0048] The method for reducing the complexity of the continuous phase modulation receiver of the present invention is divided into two stages, the former stage is to carry out orthogonal processing on the transmitted signal to reduce the number of matched filters at the front end of the receiver, and the latter stage is passed in the sequence detection stage. State fusion reduces the number of states for Viterbi decoding and uses decision feedback decoding.

[0049] Reduce the number of matched filters

[0050] The reduction of the number of matched filters in the previous stage is mainly implemented in two parts. First, it can be known from formulas (2) and (5) that CPM signals with the same correlation state but different phase states can be linearly represented by the same signal, so the same matched filter can be used to process these CPM signals...

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Abstract

The invention discloses a method for reducing the complexity of a continuous phase modulation receiver, which can effectively reduce the complexity of the continuous phase modulation (CPM) receiver. The technical scheme is that: factors influencing the complexity of the CPM system receiver are analyzed, the number of matched filters of the receiver and a maximum likelihood sequence detection state number are reduced, and orthogonal processing is performed on transmitted signals, thereby reducing the number of the matched filters at the front end of the receiver; and a Viterbi decoding state number is reduced by state fusion in a sequence detection stage, and then detection is performed in combination with decision feedback, thereby effectively reducing the complexity of the CPM receiver.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a method for reducing receiver complexity in a continuous phase modulation (CPM) communication system. Background technique [0002] Wireless channels with limited bandwidth are the bottleneck for transmitting high-speed data streams. In many application fields of existing civilian and military communication systems, it is often required to maintain stable high-speed data communication under harsh communication environments, such as mobile, multipath, and dynamic changes. In order to achieve high-speed data transmission and improve spectrum utilization, coding and modulation techniques with higher bandwidth efficiency must be used. The design of the communication system should be able to achieve the following goals, for example, higher spectrum utilization; lower out-of-band power to reduce adjacent channel interference; good anti-interference performance; constant modulat...

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Application Information

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IPC IPC(8): H04L27/22
Inventor 童启森
Owner NO 50 RES INST OF CHINA ELECTRONICS TECH GRP
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