Minimum BER Power Adjustment and Receiver Design for Distributed Space-Time Coded Cooperative MIMO Relaying Systems

TL;DR

This paper proposes an adaptive joint power allocation and receiver design algorithm based on the minimum bit error rate criterion for cooperative MIMO networks with distributed space-time coding, improving performance over traditional methods.

Contribution

It introduces a novel joint constrained optimization algorithm for power and receiver design in cooperative MIMO systems employing DSTC and AF strategies.

Findings

Performance gains over equal power allocation systems

Improved results compared to MMSE designs

Effective joint optimization for power and receiver parameters

Abstract

An adaptive joint power allocation (JPA) and linear receiver design algorithm using the minimum bit error rate (MBER) criterion for a cooperative Multiple-Input Multiple-Output (MIMO) network is proposed. The system employs multiple relays with Distributed Space-Time Coding (DSTC) schemes and an Amplify-and-Forward (AF) strategy. It is designed according to a joint constrained optimization algorithm to determine the MBER power allocation parameters and the receive filter parameters for each transmitted symbol. The simulation results indicate that the proposed algorithm obtains performance gains compared to the equal power allocation systems and the minimum mean square error (MMSE) designs.