Receive Antenna Selection for Time-Varying Channels Using Discrete Prolate Spheroidal Sequences
Receive Antenna Selection (AS) has been shown to maintain the diversity benefits of multiple antennas while potentially reducing hardware costs. However, the promised diversity gains of receive AS depend on the assumptions of perfect channel knowledge at the receiver and slowly time-varying fading. By explicitly accounting for practical constraints imposed by the next-generation wireless standards such as training, packetization and antenna switching time, the authors propose a single receive AS method for time-varying fading channels. The method exploits the low training overhead and accuracy possible from the use of Discrete Prolate Spheroidal (DPS) sequences based reduced rank subspace projection techniques.