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Meteor trail communication system self-adaptation encoding method based on TPC-RS

A meteor trail communication, TPC-RS technology, applied in the transmission system, digital transmission system, phase modulation carrier system, etc., can solve the problems of system complexity and low reliability

Inactive Publication Date: 2014-08-20
NAT TIME SERVICE CENT CHINESE ACAD OF SCI
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Problems solved by technology

[0003] The purpose of the present invention is to overcome the disadvantages of low reliability and complex system of the existing encoding method in the meteor trail communication system, and provide a TPC-RS adaptive encoding transmission method based on receiving signal-to-noise ratio estimation. The method calculates the received signal Real-time signal-to-noise ratio, change the encoding rate mode according to the change of signal-to-noise ratio, realize adaptive variable-speed transmission, effectively improve the reliability of the system and the utilization rate of the meteor channel, so as to obtain higher data throughput

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Embodiment 1

[0076] see Figure 7 As shown, the present invention provides a kind of TPC-RS-based meteor trail communication system adaptive encoding method, comprising the following steps:

[0077] 1) The sending end performs TPC-RS encoding processing on the original information bit stream to obtain encoding processing information;

[0078] 2) performing binary phase-shift keying BPSK modulation on the encoded processing information to obtain an analog signal, and sending the analog signal;

[0079] 3) Receive the analog signal sent by the sending end at the receiving end, and perform binary phase-shift keying BPSK demodulation on the received binary digital signal, and then select the TPC-RS decoding method matched with the sending end to decode, Obtained as a raw information bit stream;

[0080] 4) According to the bit error rate value required by the meteor trail communication system, calculate the signal-to-noise ratio threshold value of the original information bit stream obtained...

Embodiment 2

[0137] see figure 1 , first perform TPC-RS encoding processing on the information bit stream to generate a product code matrix.

[0138] Suppose the information sequence of the meteor trail communication system is

[0139] a → = a 0 a 1 · · · a k - 1 a k a k + 1 · ...

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Abstract

Disclosed is a meteor trail communication system self-adaptation encoding method based on TPC-RS. A self-adaptation encoding method based on a meteor trail communication system is modified, and the meteor trail communication system self-adaptation encoding method based on the TPC-RS is a self-adaptation code transmitting method based on the TPC-RS of receiving signal-noise ratio estimation. According to the rule that meteor trail channel energy changes along with the time in an index mode, under a constraint condition of a bit error rate of the system, and through the meteor signal receiving signal-noise ratio estimated in real time, the code rate redundancy of TPC-RS encoding of the system is dynamically changed, self-adaptation change of the information rate is achieved, and the utilization rate of a meteor trail channel is effectively improved. The simulation result and analysis show that under the same channel condition, the self-adaptation method can obtain 3.68dB system gain when the error bit rate is 2*10<-4 > compared with fixed code transmitting efficiency, and the data throughput is doubled.

Description

technical field [0001] The invention relates to an adaptive coding method for a meteor trail communication system, in particular to a TPC-RS-based adaptive coding method for a meteor trail communication system. Background technique [0002] Meteor trail communication (MBC) uses meteor ionization trails to reflect and scatter VHF (Vertical Horizontal Filter, cross filter line index) radio waves for communication, which has good concealment, strong anti-interference ability, low interception probability and Invulnerability, especially the ability to survive when other means of communication (such as high-frequency communication) are interrupted by the electromagnetic effect of a high-altitude nuclear explosion, makes it have a special status in emergency communication, and it has become a physical or electronic An effective means of communication protection in the event of an attack. At present, most of the existing meteor trail communication systems at home and abroad use a ...

Claims

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Application Information

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IPC IPC(8): H04L1/00H04L27/20H04L27/22
Inventor 王沛卢晓春汪瑞任品毅刘枫
Owner NAT TIME SERVICE CENT CHINESE ACAD OF SCI
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