在本文中,对理想情况下基于采样的最佳信号检测的综合分析(即,free)提出了基于扩散的浓度编码分子通信(CEMC)系统。在基于扩散的噪声和符号间干扰(ISI)条件下,已经考虑了基于广义幅移键控(ASK)的CEMC系统。通过在TN处调制信息分子的传输速率的幅度来对信息进行编码。详细解决了由此开发的基于采样的接收器中涉及的关键问题,以及它在每个符号的样本数量方面的性能,通信范围,并评估传输数据率。残留分子产生的ISI显著降低了CEMC系统的性能,当通信范围和/或传输数据速率增加时,这进一步恶化。此外,最佳接收机的性能取决于接收机准确计算ISI的能力,从而在接收机复杂度和可实现的误码率(BER)之间提供折衷。已经得出了精确和近似的检测性能。最后,发现由此开发的基于采样的信号检测方案可以应用于基于二进制和多电平(M-ary)ASK的CEMC系统,虽然M-ary系统遭受更高的误码率。
In this paper, a comprehensive analysis of the sampling-based optimum signal detection in ideal (i.e., free) diffusion-based concentration-encoded molecular communication (CEMC) system has been presented. A generalized amplitude-shift keying (ASK)-based CEMC system has been considered in diffusion-based noise and intersymbol interference (ISI) conditions. Information is encoded by modulating the amplitude of the transmission rate of information molecules at the TN. The critical issues involved in the sampling-based receiver thus developed are addressed in detail, and its performance in terms of the number of samples per symbol, communication range, and transmission data rate is evaluated. ISI produced by the residual molecules deteriorates the performance of the CEMC system significantly, which further deteriorates when the communication range and/or the transmission data rate increase(s). In addition, the performance of the optimum receiver depends on the receiver\'s ability to compute the ISI accurately, thus providing a trade-off between receiver complexity and achievable bit error rate (BER). Exact and approximate detection performances have been derived. Finally, it is found that the sampling-based signal detection scheme thus developed can be applied to both binary and multilevel (M-ary) ASK-based CEMC systems, although M-ary systems suffer more from higher BER.