Channel selective diversity for DTV mobile reception with adaptive beamforming

A channel selective diversity technique with adaptive beamforming is proposed for the efficient reception of 8-vestigial sideband (VSB) digital television (DTV) broadcasting in mobile environments. Although severe fading can be overcome with array antenna systems, a sufficient number of antenna elements are required, which has physical limitations. In addition, a multipath spatially adjacent to the mainpath can significantly degrade the performance of array systems. Accordingly, to overcome these problems, this paper proposes channel selective diversity for choosing the optimum path along with a cascaded equalizer. To increase the confidence of channel estimation, a channel estimation method is also presented that combines the auto-correlation, cross-correlation, and spatial spectrum techniques. Computer simulations confirm the advantage of the proposed algorithm for 8-VSB DTV in mobile channels.