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In this letter, we address the problem of fulfilling quality-of-service (QoS) requirements in a multiple-input multiple-output (MIMO) relay system, where a set of target signal-to-noise ratios (SNRs) should be attained on different substreams. By solving a two-step optimization problem, we obtain a power-efficient relaying scheme that can make the SNR requirements asymptotically fulfilled. A simple relay selection method is also proposed such that the relay-power consumption can be largely reduced when there is a large number of relays.

Multiple-input multiple-output (， MIMO)， relay,， power consumption,， quality-of-service (， QoS)， .，

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2009年04月06日

【期刊论文】Joint Power Allocation and Precoding for Network Coding-Based Cooperative Multicast Systems

陈文， Jun Li and Wen Chen， Member， IEEE

IEEE SIGNAL PROCESSING LETTERS, VOL. 15, 2008，-0001，（）：

-1年11月30日

摘要

In this letter, we propose two power allocation schemes based on the statistical channel state information (CSI) and instantaneous s→r CSI at transmitters, respectively, for a 2-N-2 cooperative multicast system with nonregenerative network coding. Then the isolated precoder and the distributed precoder are, respectively, applied to the schemes to further improve the system performance by achieving the full diversity gain. Finally, we demonstrate that joint instantaneous CSI-based power allocation and distributed precoder design achieve the best performance.

Cooperative multicast network,， frame error probability,， network coding,， power allocation,， precoder design.，