Signal reconstruction after severe spectral excision

When cochannel interference covers less than 100% of the spectral band of a signal, that interference can be totally spectrally excised without total excision of the signal. But severe signal distortion can result. When the signal is cyclostationary, some degree of signal restoration can be achieved by exploiting the spectral redundancy exhibited by such signals. For example, perfect reconstruction is theoretically possible for a BPSK signal with 100% excess bandwidth after 75% spectral excision. Several signal and interference scenarios are considered and the degree of signal restoration, after spectral excision, that is attainable using an adaptive FIR frequency-shift filter, is determined by computer simulation.