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This paper presents a new adaptive algorithm for the linearly constrained minimum variance (LCMV) beamformer design. We incorporate the set-membership filtering (SMF) mechanism into the reduced-rank joint iterative optimization (JIO) scheme to develop a constrained recursive least squares (RLS) based algorithm called JIO-SM-RLS. The proposed algorithm inherits the positive features of reduced-rank...
A space sense based random access (SSRA) scheme is introduced for the uplink of time division duplex (TDD) WLANs with multiple receive antennas. In SSRA scheme, each user performs space sense process to predict the post-detection signal-to-interference-and-noise-ratio (SINR) of data packets. If the predicted SINR is larger than a given threshold, the user considers the channel idle and is permitted...
This paper proposes a robust reduced-rank scheme and algorithms for adaptive beamforming based on joint iterative optimization (JIO) of adaptive filters. The scheme provides an efficient way to deal with filters with large number of elements. It consists of a bank of full-rank adaptive filters that forms a transformation matrix and an adaptive reduced-rank filter that operates at the output of the...
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