In this paper, we investigate the performance of bidirectional relay selection using amplify-andforward protocol with imperfect channel state information, i.e., delay effect and channel estimation error. The asymptotic expression of end-to-end SER in high SNR regime is derived in a closed form, which indicates that the delay effect causes the loss of both coding gain and diversity order, while ...

This paper introduces a simple combining technique for cooperative relay scheme which is based on a Detect-and-Forward (DEF) relay protocol. Cooperative relay schemes have been introduced in earlier works but most of them ignore the quality of the source-relay (S-R) channel in the detection at the destination, although this channel can contribute heavily to the performance of cooperation scheme...

A cooperative communication in a two-way relay channel is a bidirectional communication between two terminals with the aid of a common relay. In order to improve the performance of the cooperative communication in a two-way relay channel, a network coding can be used to exploit the broadcasting nature of wireless transmission. In [8], it was shown that each individual link can achieve its own c...

With the fast development of communication networks, cooperative communication has been more widely used in many different fields, such as satellite networks, broadcast networks, internet and so on. Therefore relay channels have been playing a pivotal role since their definitions were proposed by Van-der Meulen. However, the general achievable rate region of a relay channel is still unknown whi...

This paper presents a method to improve the spectral utilization in Multi-hop Relay (MMR) networks. Co-channel interference is considered as a parameter to analyze the performance of MMR (IEEE 802.16j) based relay networks. Frequency reuse technique is a way to improve the spectral utilization. Since the same frequency band is used by Relay stations and Base Station, co-channel interference wit...

We consider a network composed of two interfering point-to-point links where the two transmitters can exploit one common relay node to improve their individual transmission rate. Communications are assumed to be multiband and transmitters are assumed to selfishly allocate their resources to optimize their individual transmission rate. The main objective of this paper is to show that this confli...

The relay channel consists of a transmitter input x1, a relay input x2, a relay output y2 and a receiver output y3. In this report, we combine a degraded semi-deterministic relay channel with a semi-deterministic orthogonal relay channel to obtain a new mixture relay channel. For the new mixture relay channel, a combination of the compress-and-forward strategy and the partial decode-and-forward...