DSSS/BPSK Signal Detection And Pseudo-code Reconstruction

Today,with the highly developing electric technology,in the military field of secrecy correspondence,the rivalry sides usually use all kinds of measures to obtain useful military signals ,which will obviously interrupt the normal correspongdence.So,to ensure the safety of correspondence,the research fellows need to use the technology of spectrum spreading in correspondence. The outstanding merit of spectrum spreading technology is that it can prevent inside message from investigations by enemy,and also can inhibit various interferences.In simple words,the aim of spectrum spreading technology is to expand the emanant frequency of regulated signals,and send them to appropriate devices. When the signals arrive,they will be changed back to the orignal frequency. If the expanding frequecy of the regulated signals are interrupted by narrowband,they cannot change back to their original amanant frequency when received by appropriate devices. The expanding singnals have so many merrits such as low interception probability and high anti-interference capability.Therefore,it can obtain the central situation in secrecy correspondence nowadays, and be widely used in military correspondence system and civil correspondence.Nevertheless,the extensive use of DSSS technology also would bring us some problems. We would confront many challeges in dealing with correspondence signals. For we have little experiece in the signals applied in pratical military fields,we will obviously face many difficulties in pratical work. So I believe the investigation of DSSS technology will be a challenging task.My article emphasizes on the research of detecting and reconstructing methods of DSSS/BPSK signals. I hope the article would assist the signal analysis of useful messages. The subjects of main content as foliows:1. introduce several classical detection methods of energy and carrier wave,and compare their merrits and shortages.The main work of this article are as follows:(1)It introduces the methods of energy Detection and carrier Detection,also compares square multiplier method with related multiplier method. Through deeply analysis of these above methods, the author researches on the problem of envelope detection and phase Detection.(2)Through the deeply analysis of matrix analysis and tabu search method, the author had done a lot of reseach and experiments.