Design and realization of four-channel hybrid filter bank

Hybrid filter bank is widely used in Frequency-interleaved analog-to-digital converter (FIADC). But the filter bank mismatch of analog analysis filters and channel mismatches such as offset, gain and phase mismatches among FIADC still degrade the performance of the FIADC system This paper present a four-channel hybrid filter bank structure based on power complementary pair. The architecture we proposed only needs three analog analysis filters, which is different from traditional hybrid filter bank. The analog filters in proposed structure do not need sharp cut-off and large stopband attenuation but only need to be power complementary. by simulation. This structure can achieve near perfect-construction.