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In this paper, we have studied capacity of linear dispersion codes in frequency-flat Rayleigh fading environments. An exact analytical formula of the ergodic capacity was derived for the full-rate linear dispersion code. The ergodic capacity was given in terms of signal-to-noise ratio and multiple antenna dimension. The exact analytical expression is verified by simulation results. This study will...
This paper proposes a coding scheme for cooperative networks in the non-ideal case with system imperfections where the source and relays share their antennas to create a virtual transmit array to transmit towards their destination. We focus on the problem of coding for the relay channels. While the relays may use several forwarding strategies, including amplify-and-forward (AF) and decode-and-forward...
This paper proposes a coherent distributed convolutional-based coding scheme with channel estimation based on pilot signals. Instead of transmitting the second frames on orthogonal sub-channels from the source and relay nodes to the destination, we used Alamouti scheme in the second frame. In particular, we assume that the channel state information is estimated at all nodes involved in the transmission...
Cooperative diversity provides reliable communications between nodes in a network through relay nodes. In this paper, we introduce a new transmission protocol for relay fading channels. We examine the performance of the proposed protocol using both the amplify-and-forward (AF) and decode-and-forward (DF) modes. Our results prove that using this protocol, one can achieve full spatial diversity at full...
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