基于FPGA的宽带数字均衡器的设计与实现

Design and implementation of a wideband digital equalizerbased on FPGA

针对大瞬时宽带系统下ADC采样率大于FPGA工作时钟的幅相均衡需求,提出一种基于多相滤波的宽带数字均衡器设计方法,实测结果表明该滤波器能够同时改善通道瞬时带宽内的幅/相-频特性和通道间幅相一致性,有效提升系统脉冲压缩性能和宽带波束形成性能。

In response to the demand for amplitude and phase equalization in large instantaneous wideband systems where the ADC sampling rate is greater than the FPGA operating clock,a wideband digital equalizer is designed based on polyphase filtering.The measured results show that the filter can simultaneously improve the amplitude/phase-frequency characteristics within the instantaneous bandwidth of the channel and the amplitude-phase consistency between channels,effectively improving the system pulse compression and wideband beamforming performance.