Differential Interference Suppression Aided Three Stage Concatenated Successive Relaying
Conventional single relay aided two phase cooperative networks employing coherent detection algorithms incur a significant 50% throughput loss. Furthermore, it is unrealistic to expect that in addition to the task of relaying, the relay station would dedicate further precious resources to the estimation of the source to relay channel in support of coherent detection, which would consume extra energy expended in power hungry channel estimation. In order to circumvent these problems, we propose successive relaying employing noncoherent detection schemes. A crucial challenge in this context is that of suppressing the successive relaying induced interference, despite dispensing with any channel state information (CSI) We overcome this challenge by introducing a novel adaptive Newton algorithm based multiple symbol differential interference suppression (MS DIS) scheme. We demonstrate that our system is capable of near error free transmissions at low signal to noise ratios.
IEEE Transactions on Communications