Performance Options of a High Performance Receiver Filter Bank Channelizer
fred harris · 2020
The M-path polyphase analysis filter bank channelizer is quite a remarkable digital signal processing algorithm. In its simplest realization, the maximally decimated filter bank, the bank outputs M baseband time series from translated spectral spans with bandwidth and sample rate fs/M from M spectral bands centered at integer multiples of fs/M. Modifications to the channelizer are many and include off-sets of channelizer center frequencies, non-maximal decimation from M-to-1 to M/2-to-1 or to 3M/4-to-1 along with various post channelization signal conditioning options. We present a set of severe channelizer specifications and illustrate various channelizer modifications to reduce processing cost while meeting original design specifications.