摘要
本文首先通过分析多径传播对单频信号和调制信号的影响 ,指出在扩频方式下 ,存在进一步分离码片内多径的可能性。然后基于导出的相关解扩输出的解析表达式 ,在忽略噪声的理想条件下 ,求解码片内多径的问题可以近似转化为对一线性方程组的求解。最后对接收滤波器输出为矩形脉冲序列和三角脉冲序列两种情况进行了仿真 ,仿真结果表明 ,码片内多径的幅值、相位能够被精确地分离出来 。
In this paper,we first explore the possibility to separate subchip multipath components under spread spectrum communication model,through analysis multi path propagation affection on receiver performance with transmitting un modulated signals and modulated signals After that the discrete output expression of cross correlation is educed The possibility to separate subchip multipath components is approximately transferred to resolve a set of coupled equations Finally,with assumption that the output of receiver filter is rectangular pulse and triangle pulse,respectively,the possibility to separate subchip multipath components is evaluated Simulation results show the parameters of subchip multipath components,amplitude and phase shift,are well resolved,and the estimation errors for propagation delay are determined by sampling interval
出处
《通信学报》
EI
CSCD
北大核心
2001年第2期42-48,共7页
Journal on Communications
