摘要
从基本FIR均衡器的原理出发,讨论了校正源的设置方法和均衡器系数的计算方法。为了适应宽带阵列中高速信号处理的要求,探讨了一种经典的FIR均衡器时域高速实现方法。该时域实现虽然结构简单,但在滤波器阶数较高时需要大量的乘法资源。为了降低均衡器对乘法资源的需求,借鉴快速卷积的实现方法,提出了一种基于快速傅里叶变换的高速率均衡器实现方法。与时域方法相比,该方法在滤波器阶数大于32时能明显降低对乘法资源的损耗。对实测数据的分析,验证了该方法的正确性。
Starting with the principle of basic FIR equalizer, a setting method of wideband calibration source and a computation algorithm of FIR equalizer coefficients are discussed. To solve the problem of highrate signal process in wideband array, a classical high-sample implementation of time-domain FIR equalizer is then discussed. This time-domain method is very simple, but needs many multipliers when its order is high. To reduce the requirement of multipliers, a fast Fourier transform（FFT） based high-rate equalizer method is proposed which stems from the implementation of fast convolution. Compared with the time-domain method, this FFT based method can obviously reduce the requirement of multipliers when the order of FIR equalizer is more than 32. The analysis of practical data demonstrates the validity of proposed method.
出处
《航天电子对抗》
2013年第6期62-64,共3页
Aerospace Electronic Warfare
