CDMA卫星移动通信系统中的盲干扰抑制新方法

New Blind Interference Suppression Method for CDMA Mobile Satellite Communication Systems

CDMA卫星移动通信信号功率较弱,通常淹没在噪声中,采用恒模阵列直接对接收信号进行自适应处理,难以提取期望信号、同时抑制干扰。提出了一种先解扩后调零的恒模自适应算法,能够解决上述问题。这种方法首先对传统的解扩器进行了改进,使其输出信号适用于恒模自适应算法。仿真结果验证了这种方法的有效性。

It is difficult to suppress interference using adaptive array constant modulus algorithm in CDMA mobile satellite communication terminal because of the low power of the expected CDMA signals. In order to solve the above problem, a new blind adaptive array processing method based on a modified dispreader following a constant array was proposed. The simulation results show the validity of this method.