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首页> 外文会议>2013 7th International Symposium on Medical Information and Communication Technology : Towards Better Personalized Medicine and Healthcare >Performance study of BCJR decoding based hybrid ARQ for autonomous wireless bans
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Performance study of BCJR decoding based hybrid ARQ for autonomous wireless bans

机译：基于BCJR解码的混合ARQ用于自主无线禁令的性能研究

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摘要

In this paper, a type-I hybrid automatic-repeat-request (ARQ) scheme based on the (15,10) shortened Hamming code with the Bahl, Cocke, Jelinek, and Raviv (BCJR) decoding algorithm is studied to suppress the transmit energy of bio-sensors in wireless body area networks (WBANs) by minimizing retransmission rate. The bit-error-rate is used as a reliability-based criterion to realize a flexible block-level retransmission. The superiority of the proposed scheme is explored by analyzing the BCJR decoding with both hard and soft inputs. It is shown that the retransmission rate of our reported scheme can be largely reduced in comparison with the retransmission scheme based on the syndrome decoding over not only AWGN channels but also practical WBAN fading channels corresponding to different transceiver positions and body movements. It is revealed that the transmit power of −5dBm is sufficient for the worst channel. This is especially useful for achieving autonomous WBANs where the sensors have strict energy budgets while the gateway has a more relaxed budget.
机译：本文研究了一种基于（15,10）缩短汉明码的I型混合自动重复请求（ARQ）方案，并使用Bahl，Cocke，Jelinek和Raviv（BCJR）解码算法来抑制发射通过最小化重传速率，无线人体局域网（WBAN）中生物传感器的能量。误码率用作基于可靠性的标准，以实现灵活的块级重传。通过分析具有硬输入和软输入的BCJR解码，探索了所提方案的优越性。结果表明，与基于校正子解码的重传方案相比，不仅在AWGN信道上而且在对应于不同收发器位置和身体移动的实际WBAN衰落信道上的重传方案相比，我们报告的方案的重传率都可以大大降低。结果表明，-5dBm的发射功率足以应付最差的信道。这对于实现自主WBAN尤其有用，在该WBAN中，传感器具有严格的能源预算，而网关具有更宽松的预算。

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