Channel tracking for space-time block coded systems using particle filtering

In space-time block coded systems, the channel responses are assumed to be quasi-stationary. However, in many situations, this may not be the case and yields unsatisfactory performance. Therefore, there is a need to address the problem by tracking the channel responses in some way. We propose the use of particle filters for tracking the channel responses in space time coded systems. Compared to the case of no channel tracking, the proposed scheme improves the bit error rate (BER) of the system by at least 2 dB at higher signal-to-noise ratios (SNR).