一种适用于 PCM－FM 信号的分数间隔盲均衡算法

摘要

针对遥测系统中频率选择性衰落造成的严重码间干扰问题，提出了一种适用于 PCM-FM 信号的分数间隔盲均衡算法。该算法利用 PCM-FM 信号的恒模特性，采用过采样技术提高了收敛速度，并对宽带遥测两径信道模型进行了均衡仿真。仿真结果表明，该方法能够较好地对抗频率选择性多径衰落，消除码间干扰。%To overcome the inter-symbol interference caused by the frequency-selective fading in the telemetry system,a blind equalization algorithm based on fractionally spaced sampling for PCM-FM is proposed in this paper.According to the constant modulus of PCM-FM,the proposed algorithm uses the over-sampling technology to increase the convergence rate.The algorithm is simulated on the wideband channel model for aeronautical telemetry.Simulation results show that the proposed algorithm can effectively equalize the ISI caused by the frequency-selective fading.