Transmit antenna selection(TAS) technology has been adopted for the uplink by the next generation Long Term Evolution wireless standard in order to harness the spatial diversity offered by multiple antennas at the mobile transmitter, while keeping th

Cooperative communications techniques exploit the spatial diversity of wireless radio channel by forming antenna arrays in order to achieve Multiple Input Multiple Output (MIMO) performance in multi-user single-antenna environment.

In this letter, we propose a simple orthogonal frequency-division multiplexing (OFDM) scheme for an asynchronous cooperative system, where OFDM is implemented at the source node, and time-reversion and complex conjugation are implemented at the rel