A Minimum Bit Error-Rate Detector for Amplify and Forward Relaying Systems

In this paper, a new detector is being proposed for amplify-and-forward (AF) relaying system when communicating with the assistance of L number of relays. The major goal of this detector is to improve the bit error rate (BER) performance of the system. The complexity of the system is further reduced by implementing this detector adaptively. The proposed detector is free from channel estimation. Our results demonstrate that the proposed detector is capable of achieving a gain of more than 1-dB at a BER of 10^-5 as compared to the conventional minimum mean square error detector when communicating over a correlated Rayleigh fading channel.