Molecular communication (MC) has promising potential and a wide range of applications. However, odor-based communication which is common in nature, has not been sufficiently examined within the context of MC, yet. In this paper, we introduce a novel approach for implementing odor-based MC systems. We propose a new modulation scheme called Odor Perceptual Shift Keying (OPSK), which encodes information by shifting the perceptual values of odor molecules in pleasantness, intensity and edibility dimensions. We construct a system which transmits OPSK modulated signals between a transmitter and receiver. We conduct analyses on the system parameters to simulate performance metrics such as symbol error rate (SER) and symbol rate (SR). Our analyses indicate that OPSK has a potential for realizing odor-based MC systems. We find that under certain conditions, reliable odor-based MC systems can be implemented using OPSK across a variety of distance ranges from millimeters up to kilometers. Additionally, we introduce adaptive symbol transmission to our system for input symbol sequences featuring symbols that occur with unequal probabilities. We further demonstrate that the proposed algorithm at the transmitter side can achieve extended operation times.

翻译：分子通信在潜在应用方面具有广阔前景，但自然界常见的基于气味的分子通信尚未在分子通信框架内得到充分研究。本文提出一种实现基于气味的分子通信系统的新方法，即设计一种名为“嗅觉感知偏移键控”的新型调制方案，该方案通过改变气味分子在愉悦度、强度及可食性三个维度的感知值来编码信息。我们构建了系统，实现发送端与接收端之间的OPSK调制信号传输，并对系统参数进行分析以模拟符号错误率和符号率等性能指标。分析表明，OPSK具有实现基于气味分子通信系统的潜力。研究发现，在特定条件下，采用OPSK可实现距离范围从毫米级到千米级的可靠气味分子通信系统。此外，针对输入符号序列中出现概率不等的符号，我们为系统引入了自适应符号传输机制，并证明所提出的发送端算法能够延长系统运行时间。