Minimum Error Probability MIMO - Aided Relaying : 2 Multihop , Parallel , and Cognitive Designs

A design methodology based on the minimum error proba8 bility (MEP) framework is proposed for a nonregenerative multiple-input 9 multiple-output relay-aided system. We consider the associated cognitive, 10 the parallel, and the multihop source–relay-destination link design based 11 on this MEP framework, including the transmit precoder, the amplify-and12 forward relay matrix, and the receiver equalizer matrix of our system. It 13 has been shown in the literature that MEP-based communication systems 14 are capable of improving the error probability of other linear counter15 parts. Our simulation results demonstrate that the proposed scheme in16 deed achieves a significant bit-error-ratio reduction over the existing linear 17 schemes. 18