【摘要】 提出一种改进的并行组合扩频超宽带接收机结构,可在接收端提供特殊的相关模板信号,同时完成超宽带信号的解调和并行组合扩频信号的相关解扩,降低了超宽带解调部分产生的误码对系统整体性能的影响,并在高斯白噪声信道条件下进行了系统性能仿真.仿真结果表明,改进的并行组合扩频超宽带接收机结构其性能优于改进前的结构,在误比特率为10-4时,改进后的结构较改进前的结构所需信噪比降低了2 dB左右.更多还原

【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.更多还原