Cascade of perfect reconstruction analysis and synthesis filter banks: the new architecture of next generation wideband receivers
J. S. Harris, Elettra Venosa, Xiaofei Chen · 2013
We present here an innovative new receiver architecture with extreme computational efficiency that performs the multitude of DSP processing tasks required in a modern high bandwidth receiver with significantly reduced computational resources and with commensurate reduced power supply requirements. The system uses a pair of M-path perfect reconstruction polyphase filter banks to first form an input analysis filter bank and an output synthesis filter bank. The signal processing that implement the various signal processing tasks are applied as frequency dependent gains and additive corrections to the intermediate narrow band, reduced sample rate, time series residing between the analysis and synthesis filter banks. Sets of frequency dependent weights that represent each filtering task can simultaneously implement a channelizer, a matched filter, an equalizer, an intrusion canceller, an I-Q balancer, timing clock alignment, and carrier frequency and phase alignment. (8 pages)