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The performance of a two-way relay system with beamforming is investigated over Nakagami-m fading channels. Our analysis considers an amplify-and-forward relay system consisting of two terminals equipped with multiple antennas, and a variable-gain relay with a single antenna. Exact closed-form expressions for the outage probabilities of two unidirectional links of the two-way system are derived, respectively...
Network coding has been proved as an effective way to enhance the throughput of the multihop wireless ad hoc networks in both unicast and multicast traffics. However, in a random network topology with non-coding-aware routing protocols, the performance enhancement may be limited because the packet routing scheme does not take advantage of the possibility of network coding. In this paper, we propose...
Network coding is a promising technology that can effectively improve the efficiency and capacity of multihop wireless networks by exploiting the broadcast nature of the wireless medium. However, current packet routing schemes do not take advantage of the network coding, and the benefits of network coding have not been fully utilized. To improve the performance gain of network coding, in this paper,...
This paper presents a bus coding methodology for instruction memory data-bus switching reduction. Compared to the existing state of the art multi-way partial bus-invert coding (MPBI) which relies on data bit-correlation, our approach is very effective in reducing switching activity for bus data, since little correlation can be observed on instruction data buses. Our experiments demonstrate the proposed...
Although the coding mode of non-RDO in H.264 greatly increases the execution speed of intra prediction, shorter execution time is required. A new intra prediction mode decision algorithm is proposed. First, the intra prediction mode of two chroma macroblocks of same location is only decided by one chroma block. Second, the idea of low resolution and SAD criterion are exploited to select the best 16...
Small area and code size are two critical design issues in most of embedded system designs. In this paper, we tackle these issues by customizing forwarding networks and instruction encoding schemes for multi-pipe Application Specific Instruction-Set Processors (ASIPs). Forwarding is a popular technique to reduce data hazards in the pipeline to improve performance and is applied in almost all modern...
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