Accurate BEP of OSTBC-MIMO Systems with DF Incremental Relay Selection

Abstract

This paper addresses the analysis of Bit Error Probability (BEP) in Multiple Input Multiple Output (MIMO) systems based on Orthogonal Space Time Block Coding (OSTBC) and Incremental Decode and Forward (IDF) protocol with relay selection. According to IDF, the direct link is used by the destination, if it can successfully decode the source codeword; otherwise, it requests the assistance of the best relay among those that have correctly decoded the received codeword. In the relaying phase, the best relay decodes the source codeword and forwards the received symbols to the destination. The proposed numerical results show that the BEP of OSTBC-MIMO systems with relay-selection IDF is enhanced compared to the case without relay selection. These results are obtained assuming that the channel fading envelopes of different links are independent Rayleigh distributions.

Keywords

• cooperative system
• decode and forward
• incremental relaying
• MIMO
• OSTBC
• relay selection