计算机科学 ›› 2019, Vol. 46 ›› Issue (4): 112-117.doi: 10.11896/j.issn.1002-137X.2019.04.018

• 网络与通信 • 上一篇    下一篇

基于用户间干扰的分子通信模型的信道容量分析

程珍, 林飞, 赵慧婷, 章益铭   

  1. 浙江工业大学计算机科学与技术学院 杭州310023
  • 收稿日期:2018-03-28 出版日期:2019-04-15 发布日期:2019-04-23
  • 通讯作者: 程 珍(1981-),女,博士,副教授,主要研究方向为分子通信与纳米网络,E-mail:chengzhen@zjut.edu.cn(通信作者)
  • 作者简介:林 飞(1992-),男,硕士,主要研究方向为分子通信与纳米网络;赵慧婷(1992-),女,硕士,主要研究方向为分子通信与纳米网络;章益铭(1993-),硕士生,主要研究方向为分子通信与纳米网络。
  • 基金资助:
    本文受国家自然科学基金(61472367),浙江省自然科学基金(LY19F020029)资助。

Analysis of Channel Capacity of Molecular Communication Model Based on Inter-user Interference

CHENG Zhen, LIN Fei, ZHAO Hui-ting, ZHANG Yi-ming   

  1. College of Computer Science and Technology,Zhejiang University of Technology,Hangzhou 310023,China
  • Received:2018-03-28 Online:2019-04-15 Published:2019-04-23

摘要: 在扩散的多用户分子通信模型中,被释放的分子遵循布朗运动规则,不可避免地存在分子间码间干扰ISI(Inter-Symbol Interference)和用户间干扰IUI(Inter-User Interference)。因此,如何提高该系统的信道容量是目前分子通信模型研究的挑战之一。针对扩散的OOK(On-Off Keying)调制的多用户分子通信模型,分析了ISI和IUI,并通过最小平均错误概率准则得到了接收方纳米机器检测过程中的最优判决阈值,从而优化了信道容量。最后使用MATLAB仿真展示了不同的参数对该分子通信模型的信道容量性能的影响。仿真结果表明,通过设置适当的先验概率、增加扩散系数和时隙持续时间、减少发送方纳米机器和接收方纳米机器之间的距离和用户数,能够提高基于用户间干扰的分子通信模型的信道容量,并降低误码率。

关键词: 分子通信, 信道容量, 用户间干扰, 最优判决阈值

Abstract: In the diffusive multi-user molecular communication model,the released molecules follow Brownian motion rules,the Inter-Symbol Interference (ISI) and Inter-User Interference (IUI) among the molecules inevitably exist.Therefore,how to increase the channel capacity of system is a challenge in the current research on the molecular communication model.For the diffusive multi-user molecular communication model with On-Off Keying (OOK) modulation,the ISI and IUI were analyzed.The minimum average error probability criterion was used to obtain the optimal decision threshold in the detection process for the receiver nanomachine,and then the channel capacity was optimized.Finally,MATLAB simulations were used to demonstrate the effects of different parameters on the channel capacity performance of this molecular communication model.The simulation results show that by setting appropriate prior probability,increasing the diffusion coefficient and time slot duration,reducing the distance between the transmitter nanomachine and the receiver nanomachine and the number of users,the channel capacity of the molecular communication model based on IUI can be improved,and the bit error rate is reduced.

Key words: Channel capacity, Inter-user interference, Molecular communication, Optimal decision threshold

中图分类号: 

  • TP391.9
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