Abstract:

Providing special correlated template, an improved ultra wide band (UWB) receiver based on parallel combinatory spread spectrum is presented. With help of these special templates, the UWB signals demodulation and despread of parallel combinatory spread spectrum signals can accomplished, and the infection coming from the error codes in demodulation of the UWB portion is reduced as well. Simulation shows that, under the background of the additive white Gaussian noise, the improved structure has a better biterror rate performance. And when the bit error rate is about 10-4, the signal to noise ratio of the improved structure needed is about 2dB lower than the former one. 

Key words: parallel combinatory spread spectrum, ultra wide band, correlated template, MPAM modulation, data map