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Outage performance of distributed MIMO MRC system subjected to composite Rayleigh-Lognormal fading channel is considered. Using random Wishart matrix theory and Gauss-Hermite quadrature, we derived closed form expressions for its outage probability. The theoretical expressions are validated by numerical results. It is show that distributed MIMO MRC system promise significant diversity gains over single-input...
This paper studies the performance limits of two-way relay channel (TWRC) at finite signal-to-noise ratio (SNR) in Rayleigh fading environment. A two-phase decode-and-forward (DF) protocol is considered. We first derive closed-form expressions for both outage probability and diversity-multiplexing tradeoff (DMT). Our results are general and suitable for any time sharing and any rate allocation in...
We present a new physical layer network coding (PLNC) scheme, called superimposed XOR, for two-way relay channels. The new scheme specifically takes into account the channel as well as information asymmetry in the broadcast phase of two-way relaying. It is based upon both bitwise XOR and symbol-level superposition coding. We first derive its achievable rate regions when integrated with two known time...
We propose a novel cooperative communication protocol for multicasting a common message from one source to two destinations and based on that offer a spectrum access scheme for the cognitive radios that seek to utilizing the spectrum holes within the bands licensed to the legacy systems. The proposed cooperation model has two major traits; first, by opportunistically and dynamically assigning one...
We consider a downlink OFDMA cellular network wherein groups of access points are coordinated and we address the problem of jointly selecting the set of co-channel users and the power allocation across tones in order to maximize the weighted system sum-rate subject to per-base-station power constraints. To solve this problem, we propose a successive convex approximation for low-complexity (SCALE)...
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