Antenna Selection for Time-Varying Channels Based on Slepian Subspace Projections

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Executive Summary

Single receive Antenna Selection (AS) allows Single-Input Single-Output (SISO) systems to retain the diversity benefits of multiple antennas with minimum hardware costs. The authors propose a single receive AS method for time-varying channels, in which practical limitations imposed by next-generation wireless standards such as training, packetization and antenna switching time are taken into account. The proposed method utilizes low-complexity subspace projection techniques spanned by Discrete Prolate Spheroidal (DPS) sequences. It only uses Doppler bandwidth knowledge, and does not need detailed correlation knowledge.

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