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本文提出一种基于AR模型谱估计和变换域处理相结合的直接序列扩频（DS-SS）通信系统窄带干扰抑制方法。该方法采用AR模型估计信号的频谱,并由此构造频域窄带干扰抑制滤波器。由于谱估计的同时也估计了最小误差功率,这为频域抑制滤波器的门限提供了参考,从而实现了自动门限设置。与时域AR预测型窄带干扰抑制方法相比,频域处理利用FFT实现了并行处理,提高了处理速度。
This paper proposes a narrowband interference suppression method based on the combination of AR model spectrum estimation and transform domain processing in direct sequence spread spectrum (DS-SS) communication systems. This method uses the AR model to estimate the frequency spectrum of the signal, and constructs a frequency-domain narrowband interference suppression filter. Since the spectral estimation also estimates the minimum error power, this provides a reference for the threshold of the frequency-domain rejection filter, thus realizing the automatic threshold setting. Compared with the time-domain AR prediction narrowband interference suppression method, the frequency domain processing uses the FFT to realize the parallel processing and improves the processing speed.