Diffusive molecular communications (DiMC) have recently gained attention as a candidate for nano- to micro- and macro-scale communications due to its simplicity and energy efficiency. As signal propagation is solely enabled by Brownian motion mechanics, DiMC faces severe inter-symbol interference (ISI), which limits reliable and high data-rate communications. Herein, recent literature on DiMC performance enhancement strategies is surveyed; key research directions are identified. Signaling design and associated design constraints are presented. Studies on fundamental information theoretic limits of DiMC channel are reviewed. Classical and novel transceiver designs are discussed with an emphasis on methods for ISI mitigation and performance-complexity tradeoffs. Key parameter estimation strategies such as synchronization and channel estimation are considered in conjunction with asynchronous and timing error robust receiver methods. Finally, source and channel coding in the context of DiMC is presented.

由于其简单性和能源效率，扩散分子通信 (DiMC) 最近作为纳米到微米和宏观尺度通信的候选方法而受到关注。由于信号传播完全由布朗运动力学实现，DiMC 面临严重的符号间干扰 (ISI)，这限制了可靠和高数据速率的通信。在此，调查了有关 DiMC 性能增强策略的最新文献；确定了重点研究方向。介绍了信令设计和相关的设计约束。综述了 DiMC 信道基本信息理论极限的研究。讨论了经典和新颖的收发器设计，重点是 ISI 缓解和性能复杂性权衡的方法。关键参数估计策略，例如同步和信道估计，是结合异步和定时错误稳健接收器方法来考虑的。最后，介绍了 DiMC 上下文中的源和信道编码。