Joint Cochannel Interference Cancellation and Channel Shortening with Space-time Processing

The mitigation of co-channel interference (CCI) and inter-symbol interference (ISI) has been a major area of focus of researchers in wireless communications. An approach of interest separates CCI cancellation and ISI equalization in a slow frequency-selective Rayleigh fading channel into two stages. A space-time filter reduces the CCI, followed by a Viterbi equalizer for ISI equalization. The complexity of the Viterbi equalizer can be reduced by using a filter for channel shortening. I am investigating various ways to design a space-time finite-impulse response (FIR) filter which would perform joint CCI cancellation and channel shortening, while maximizing a signal-to-interference-plus-noise-like objective function.