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For downlink multi-user multiple-input multiple-output (MU-MIMO) system, the precoding scheme of maximizing signal-to-leakage-and-noise (SLNR) at base station (BS) relies on channel covariance matrix. However, the CSI feedback defined in LTE/LTE-A does not directly correspond to channel covariance. Instead, precoding matrix indicator (PMI) and channel quality indicator (CQI) are fed back from user...
The original diversity-multiplexing tradeoff work by Zheng and Tse assumes multi-input-multi-output (MIMO) systems with frequency flat, spatially independent, and temporally block fading. Several following works have extended the tradeoff to either frequency selective or spatially correlated channels. However, all of them assume that fadings are temporally block. Compared with block fading assumption,...
This paper introduces novel direction-of-arrival (DOA) estimation techniques for periodic sense positioning systems (e.g., pulse radar systems and wireless local positioning systems). Periodic signaling between a tracker (e.g., dynamic base station) and a target (e.g., transceiver) in these systems introduces a nature of cyclostationarity to the received signal at the receiver of the tracker. The...
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