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In this paper, we propose a systematic limited feedback scheme for multiple-input single-output (MISO) transmit beamforming systems under temporally correlated channels with feedback delay. At the receiver, the channel direction information for the forthcoming transmission is predicted along a geodesic on a unit complex hypersphere. The transmitter successively updates its knowledge to the channel...
In unitary precoded multi-antenna systems with delayed feedback, the quantized channel state information (CSI) may become outdated before its actual use at the transmitter. In this letter, by exploiting the geometric properties of the Grassmannian manifold, we invoke the use of Grassmannian subspace predictive coding (GSPC) to overcome this problem. Under the framework of GSPC, a novel limited feedback...
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