A Method of Simulation and Evaluation for DS/CDMA System Improved on Anti-interference Performance

摘要

In this paper, we proposed a method of simulation an evaluation. Through this method, we can evaluate the feasibility an validity of the technique (electromagnetism compatibility technique) which improve the anti-interference of performance of DS/CDMA system in impulse radio noise environment. We established a system model to simulate the anti-interference performance of the DS/CDMA system in impulse radio noise environment. In the model, generate binary code signal and clock signal; then spread spectrum and modulated it into BPSK signal; added the necessary noise to the modulated signal; demodulated the modulated signal; work out the BER of the system and give the BER figure. The evaluating results are essentially the same with the results by measured. The simulation and evaluation method can be used to evaluate different anti-interference techniques by means of adjusting function of some modules in the simulation system.