WLC42-3: MIMO-OFDM Beamforming for Improved Channel Estimation

This paper takes a system view of the MIMO-OFDM beamformer design problem. We present a design method that helps improve the receiver channel estimation performance without damaging the optimality of beamforming. We design a so-called smoothed singular value decomposition (SSVD) algorithm to get smooth equivalent channels after beamforming, and thus the receiver can apply interpolation and smoothing to improve channel estimation. We then present some analysis of the statistical characteristics of the equivalent channel, which will be useful in designing the channel estimation. Simulation results are shown to support our algorithm.