Diffusive Mobile Molecular Communications Over Time-Variant Channels
Diffusive Mobile Molecular Communications Over Time-Variant Channels
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DOI：
10.1109/lcomm.2017.2678467
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发表时间：
2017-02
期刊：
影响因子：
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通讯作者：
Arman Ahmadzadeh;V. Jamali;Adam Noel;R. Schober
中科院分区：
文献类型：
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作者：
Arman Ahmadzadeh;V. Jamali;Adam Noel;R. Schober
这封信介绍了一种为扩散分子通信系统的时变通道建模的形式。特别地，我们考虑一种流体环境，其中除了用于通信的信息分子的扩散运动之外，一台发射器纳米机器和一台接收器纳米机器还承受布朗运动。由于发射器和接收器纳米机器的随机运动，信道脉冲响应的统计数据随时间变化。我们表明，通过适当修改信息分子的扩散系数可以准确捕获通道的时变行为。此外，我们推导了一个解析表达式，用于评估所考虑系统的简单检测器的预期误差概率。通过基于粒子的布朗运动模拟验证了所提出的解析表达式的准确性。
This letter introduces a formalism for modeling time-variant channels for diffusive molecular communication systems. In particular, we consider a fluid environment where one transmitter nano-machine and one receiver nano-machine are subjected to Brownian motion in addition to the diffusive motion of the information molecules used for communication. Due to the stochastic movements of the transmitter and receiver nano-machines, the statistics of the channel impulse response change over time. We show that the time-variant behavior of the channel can be accurately captured by appropriately modifying the diffusion coefficient of the information molecules. Furthermore, we derive an analytical expression for evaluation of the expected error probability of a simple detector for the considered system. The accuracy of the proposed analytical expression is verified via particle-based simulation of the Brownian motion.