Research Of Dsss Signal Blind Dedecting Method And Implement

In recent years, with the rapid development of the communications industry, alarge number of high-tech technology used in the military, making all kinds of advancedweapons systems and military means more dependent on the support of various types ofmilitary electronic systems able to complete the command and control andcommunications functions, master The control of information has become an importantfactor to win the war. Microwave trunk network is an important part of the tacticalcommunications systems, microwave backbone transmission equipment connected tomultiple access networks into a complete tactical communications system. Therefore,the study microwave trunk network interference means and confrontation, theconfrontation of the research tactical communications network has a very important role.Communication confrontation plays a vital role in modern military information warfare,is to seize control of information and use rights so as to achieve an important means ofinformation station. Communication confrontation with communication reconnaissanceand communication interference of two parts. Communication Reconnaissance purposeis to obtain the non-cooperative communication technology and institutional.Communications interference According to the information obtained by theCommunication Reconnaissance to interfere with the non-cooperative communicationsystem, using all possible means to deceive confuse non-cooperative to failure at acritical moment, resulting in non-cooperative command and control chaos own militarydominant.The task of this paper comes from military communications against the pre-researchtopics, research priorities spread-spectrum detection of non-cooperative communicationconditions. Based on spread spectrum communication the DSSS signal blind detectiontechnology to achieve communication reconnaissance, extraction of non-cooperativecommunication parameters of the spread spectrum signal, the main parametersincluding the the testing center frequency, the spreading symbol rate, the spreading codelength, the spreading codes primitive multiphase and the beginning of the samespreading code. The main parameters for despreading a series of parameters including the detectedcenter frequency, the spread symbol rate, the length of the spreading code and thespread code pattern. In this paper, the secondary processing power spectral method isestimated to detect the center frequency, the use of the long period of the spreading codeautocorrelation detection and use of the m-sequence the GOLD code generation rulestraverse the search spreading code pattern series of non-cooperative communicationnetwork Get parameters. Finally, MATLAB simulation related parameters in the FPGAbased the XILINX XC5VLX50T the high-speed signal processing hardware platformon DSSS signal blind detection, to achieve the purpose of the non-cooperative spreadspectrum communication signal reconnaissance.