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The underwater acoustic (UWA) communication has been regarded as one of the most challenging wireless communications due to the unique properties, such as limited bandwidth, extended multipath delay, medium inhomogeneities, rapid time-variation and large Doppler shifts. Cooperative relaying technique is a promising technique to provide high rate data transmission. However, literature on cooperative...
A limited-feedback-based dynamic resource allocation algorithm is proposed for a relay cooperative network with orthogonal frequency-division-multiplexing (OFDM) modulation. A communication model where one source node communicates with one destination node assisted by one half-duplex decode-and-forward (DF) relay is considered in this paper. We first consider the selective DF scheme, in which some...
In this paper, we propose a dynamic power allocation scheme for a single-relay network based on orthogonal frequency division multiplexing (OFDM) modulation with limited feedback.We consider an Amplify-and-Forward (AF) cooperative diversity model, where one source node communicates with one destination node assisted by one half duplex relay. The power allocation scheme employs a codebook of quantized...
It has been shown that channel state information (CSI) at transmitter can significantly increase the performance of a relay system. However, most of the existing designs assume perfect CSI at the transmitters. Since most practical systems can only obtain partial CSI at the transmitters, it is necessary to analyze the relay channels with limited CSI feedback. Our objective in this paper is to find...
Relay enhanced cellular (REC) system and orthogonal frequency division multiple access (OFDMA) technology are regarded as the key features of 4G communication systems. How to utilize resource wisely in OFDMA-based REC systems is an important and challenging research topic. This paper reviews the major issues in designing radio resource management (RRM) algorithms for REC systems. A new resource allocation...
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