Spectral efficiency under Transmit Antenna and LDC selection with throughput maximization using WiMAX

Abstract

In this paper the spectral efficiency using combinations of Transmit Antenna Selection with Linear Dispersion Code Selection (TACS) is studied. The selection criterion is defined in order to maximize the spectral efficiency while bounding the maximum error rate (Rate Adaptation). The performance of the proposed spatial link adaptation scheme is evaluated under low mobility environments concluding that in case of linear receivers (e.g. MMSE) the TACS scheme with adaptive coding and modulation achieves a noticeable SNR gain (up to 3dB) in a wide SNR range (from 6 to 18dB), and could be considered as a powerful technique to achieve a smooth transition between diversity and multiplexing in order to maximize the overall system throughput1.