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 wide-band 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 instanta-neous bandwidth of the channel and the amplitude-phase consistency between channels,effectively improving the system pulse compression and wideband beamforming performance.
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