Device and method for synchronous detection of burst msk direct spread communication

Abstract

The invention relates to a burst MSK direct spread communication synchronous detection device and method, which belongs to the technical field of signal detection and solves the problems of complex algorithm and low detection efficiency of the existing detection device. The device includes a signal preprocessing module, which obtains digital intermediate frequency signals including multiple synchronous sequences based on analog radio frequency signals; multiple synchronous sequence detection modules, which are respectively used to detect corresponding synchronous sequences; and obtains digital intermediate frequency signals based on digital intermediate frequency signals through multiple filters. Multiple numerical sequences, based on the synchronous symbol corresponding to the synchronous sequence, extract and select the corresponding numerical value from multiple numerical sequences to calculate and obtain the time domain correlation value, and then judge whether the digital intermediate frequency signal contains the synchronous sequence; synchronous pulse joint detection The module determines whether there is communication information in the digital intermediate frequency signal and the position of the communication information based on the number and time of the detected synchronization sequences. The synchronization detection device has the advantages of simple algorithm, small calculation amount and high detection efficiency.

Description

technical field [0001] The invention relates to the technical field of signal detection, in particular to a burst MSK direct spread communication synchronization detection device and method. Background technique [0002] For burst data communication, the information is pulse-modulated and the position is unknown. At present, spread spectrum technology is generally used, and a set of spread spectrum sequences with excellent autocorrelation is inserted before the transmitted data frame for system synchronization. The sequence is detected to determine whether the information exists and the specific location of the information, and then the subsequent data information is analyzed to obtain the original information transmitted. [0003] MSK modulation is a special FSK modulation method. Different from traditional BPSK / QPSK modulation methods, MSK modulation realizes the transmission of symbol 0 / 1 by changing the frequency of the transmitted signal. For continuous wave MSK, the p...

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Problems solved by technology

[0006] In view of the above analysis, the present invention aims to provide a burst MSK direct spread communication synchronization detection device and method to solve the problems of existing synchronization sequence signal detection devices, high computational complexity, low spread spectrum gain and low detection efficiency

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