A novel design of Direct Sequence Spread Spectrum receiver based on software radio

The synchronous carrier is difficult to extract in low SNR power line communication environment by traditional spread-spectrum demodulation method. To solve this problem, a novel design of DSSS (direct sequence spread spectrum) receiver, based on software radio structure and band-pass sampling theorem is proposed in this paper. The designed receiver consists of A/D converter and digital low-pass filter, which can demodulate information without carrier synchronization. Moreover, spread-spectrum demodulation can be realized in base band. Both theoretical analysis and simulation results prove that the novel receiver structure has low system spending and high anti-noise performance and it can be applied in rough communication environment.