Rapid MSK communication detection demodulation method

Abstract

The invention discloses a rapid MSK communication detection demodulation method, and relates to an easy and rapid MSK communication detection and information blind demodulation reduction method. A user judges whether target communication exists or not and completes information demodulation reduction according to analysis of output signals of a monitoring/reconnaissance receiver in the certain radio environment and extraction of key parameters. The method comprises the steps that a non-cooperative receiver searches for and scans a related frequency band, the computation complexity is low, and software and hardware are easy to obtain. Meanwhile, the information blind demodulation reduction method is a non-coherent detection method. According to the rapid MSK communication detection demodulation method, complex operation processing of carrier phase synchronization is avoided by achieving demodulation reduction of unknown information, meanwhile, the requirement for system carrier frequency estimation accuracy is low, a certain error is allowed to exist in carrier frequency estimation, and the requirements that deviation possibly exists in the working frequency in actual communication and the signal to noise ratio received by non-cooperative communication is low are met.

Description

technical field [0001] The invention relates to a MSK communication non-cooperative detection and demodulation method, in particular to a fast MSK communication detection and demodulation method. Background technique [0002] The characteristics of the existing MSK non-cooperative detection processing method are as follows: 1) The algorithm is complex and the amount of calculation is large; 2) The singularity point of the signal is detected by wavelet transform by using the characteristics of sudden changes in the symbol transformation of the low-pass baseband signal 3) The method of bit delay multiplication is used for differential detection, the algorithm has weak resistance to noise, and cannot adapt to the low signal-to-noise ratio requirements of non-cooperative communication detection, and information demodulation restores High bit error rate; 4) Most of the detection processing is only for a certain aspect of MSK communication detection processing, and cannot form a c...

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Problems solved by technology

[0002] The characteristics of the existing MSK non-cooperative detection processing method are as follows: 1) The algorithm is complex and the amount of calculation is large; 2) The singularity point of the signal is detected by wavelet transform by using the characteristics of sudden changes in the symbol transformation of the low-pass baseband signal 3) The method of bit delay multiplication is used for differential detection, the algorithm has weak resistance to noise, and cannot adapt to the low signal-to-noise ratio requirements of non-cooperative communication detection, and information demodulation restores High bit error rate; 4) Most of the detection processing is only for a certain aspect of MSK communication detection processing, and cannot form a complete and effective communication detection and information demodulation restoration scheme

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