Performance Analysis and Simulation of Convolution Error Correction Coding Based DSSS Communication System
Both the techniques of spread spectrum and channel coding are able to reduce the bit error rate by the sake of the channel band width.In order to analyze the effect of the convolution coding on the coded direct sequence spread spectrum(CDSSS) system,the simulation model of the CDSSS communication system was built.The simulation results demonstrated that in the CDSSS communication system when the rate and the constraint length are invariable,the Viterbi decoding block which employed soft-decision rather than hard-decision would be likely to get better system performance.Meanwhile,the effect of the convolution code rate on the CDSSS system performance was obvious.