This survey paper focuses on the estimation schemes in molecular communication (MC) systems. The existing studies in estimation schemes can be divided into parameter estimation (e.g., distance, diffusion coefficient, and flow velocity) and channel estimation. In this paper, we present, for the first time, a comprehensive survey on i) distance estimation, since distance is the most widely estimated parameter in current studies, ii) estimation of other parameters (i.e. the parameters excluding distance), and iii) channel estimation that focuses on the channel impulse response (CIR). Moreover, we examine the noise that may impact on the estimation performance and the metrics applied to evaluate the performance of different estimation schemes. Numerical results are provided to compare the performance of different distance estimation schemes. In addition, future research directions in parameter estimation and channel estimation are identified and discussed.
翻译:这份调查文件侧重于分子通信系统的估算计划;估计计划中的现有研究可以分为参数估算(如距离、扩散系数和流量速度)和通道估算;在本文件中,我们首次对距离估算进行全面调查,因为距离是当前研究中最广泛估算的参数;对其他参数(即排除距离的参数)的估计;以及侧重于频道脉冲反应的频道估算;此外,我们还审查了可能影响估算绩效的噪音和用于评估不同估算计划绩效的尺度;提供了数字结果,以比较不同距离估算计划的执行情况;此外,还查明并讨论了参数估算和频道估算的未来研究方向。