Joint Data / Channel Estimation for Frequency Selective ( Time - Varying ) Multi - path Channels with Antenna Arrays

| A joint data and channel estimation/tracking algorithm is presented for the time varying frequency selective multi-path fading channel. An in-depth formulation of time varying frequency selective channel structure is developed for a receiver employing multiple antennae where the formulation of the channel model enables channel tap delays a fraction of the symbol period. Moreover the Doppler frequency shifts are embedded in the formulation. State-space formulation developed for the time varying channel leads to the recursive least square (RLS) channel estimator, and a Kalman channel state tracker. The data estimation is accomplished by using the Viterbi algorithm (MLSEVA). The MLSE-VA used here is the Per-BranchProcessing Viterbi Algorithm [4] (PBP-VA) which enables the updated channel estimates to be used in the metric computations of the data sequence estimation process. BER performance of the receiver will be presented for di erent estimators.