Increasing Robustness to Synchronisation Errors in Molecular Communications
Increasing Robustness to Synchronisation Errors in Molecular Communications
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DOI：
10.1109/istc.2018.8625364
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发表时间：
2018-12
期刊：
影响因子：
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通讯作者：
Tze-Yang Tung;U. Mitra
中科院分区：
文献类型：
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作者：
Tze-Yang Tung;U. Mitra
在扩散的分子通信环境中，实现发送器和接收器之间的精确同步尤其具有挑战性。为此，研究了点对点分子通信系统的设计，其中明确考虑了同步误差。考虑了两个收发机设计问题：基于顺序概率比测试的检测器的开发，其允许在由于接收器处的未同步而存在不确定性的情况下进行附加观测，以及针对该接收器策略优化的调制设计。该调制基于优化检测策略的错误概率的近似值，并且直接利用分子在特定时隙内击中接收器的概率的结构。与基于判决反馈的接收机相比，在相同数据速率下，所提出的接收机和调制设计可将异步检测性能显著提高1/2。
Achieving precise synchronisation between transmitters and receivers is particularly challenging in diffusive molecular communication environments. To this end, pointto-point molecular communication system design is examined wherein synchronisation errors are explicitly considered. Two transceiver design questions are considered: the development of a sequential probability ratio test-based detector which allows for additional observations in the presence of uncertainty due to miss-ynchronisation at the receiver, and a modulation design which is optimised for this receiver strategy. The modulation is based on optimising an approximation for the probability of error for the detection strategy and directly exploits the structure of the probability of molecules hitting a receiver within a particular time slot. The proposed receiver and modulation designs achieve strongly improved asynchronous detection performance for the same data rate as a decision feedback based receiver by a factor of 1/2.