Ratio Shift Keying Modulation for Time-Varying Molecular Communication Channels

IF 3.7 4区 生物学 Q1 BIOCHEMICAL RESEARCH METHODS IEEE Transactions on NanoBioscience Pub Date : 2023-07-25 DOI:10.1109/TNB.2023.3298600
M. Okan Araz;Ahmet R. Emirdagi;M. Serkan Kopuzlu;Murat Kuscu
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Abstract

Molecular Communications (MC) is a bio-inspired communication technique that uses molecules to encode and transfer information. Many efforts have been devoted to developing novel modulation techniques for MC based on various distinguishable characteristics of molecules, such as their concentrations or types. In this paper, we investigate a particular modulation scheme called Ratio Shift Keying (RSK), where the information is encoded in the concentration ratio of two different types of molecules. RSK modulation is hypothesized to enable accurate information transfer in dynamic MC scenarios where the time-varying channel characteristics affect both types of molecules equally. To validate this hypothesis, we first conduct an information-theoretical analysis of RSK modulation and derive the capacity of the end-to-end MC channel where the receiver estimates concentration ratio based on ligand-receptor binding statistics in an optimal or suboptimal manner. We then analyze the error performance of RSK modulation in a practical time-varying MC scenario, that is mobile MC, in which both the transmitter and the receiver undergo diffusion-based propagation. Our numerical and analytical results, obtained for varying levels of similarity between the ligand types used for ratio-encoding, and varying number of receptors, show that RSK can significantly outperform the most commonly considered MC modulation technique, concentration shift keying (CSK), in dynamic MC scenarios.
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时变分子通信信道的比移键控调制。
分子通信(MC)是一种利用分子编码和传输信息的生物启发通信技术。许多人致力于根据分子的各种可区分特性(如浓度或类型)为 MC 开发新型调制技术。在本文中,我们研究了一种名为 "比移键控(RSK)"的特殊调制方案,在这种方案中,信息以两种不同类型分子的浓度比进行编码。根据假设,RSK 调制能在动态 MC 场景中实现准确的信息传输,在这种场景中,时变信道特性对两种分子的影响相同。为了验证这一假设,我们首先对 RSK 调制进行了信息理论分析,并得出了端到端 MC 信道的容量,在这种信道中,接收器根据配体-受体结合统计数据以最优或次优方式估计浓度比。然后,我们分析了 RSK 调制在实际时变 MC 场景(即移动 MC)中的误差性能,在这种场景中,发射器和接收器都经历了基于扩散的传播。我们对用于比率编码的配体类型之间不同程度的相似性和不同数量的受体进行的数值和分析结果表明,在动态 MC 场景中,RSK 的性能明显优于最常用的 MC 调制技术--浓度偏移键控(CSK)。
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来源期刊
IEEE Transactions on NanoBioscience
IEEE Transactions on NanoBioscience 工程技术-纳米科技
CiteScore
7.00
自引率
5.10%
发文量
197
审稿时长
>12 weeks
期刊介绍: The IEEE Transactions on NanoBioscience reports on original, innovative and interdisciplinary work on all aspects of molecular systems, cellular systems, and tissues (including molecular electronics). Topics covered in the journal focus on a broad spectrum of aspects, both on foundations and on applications. Specifically, methods and techniques, experimental aspects, design and implementation, instrumentation and laboratory equipment, clinical aspects, hardware and software data acquisition and analysis and computer based modelling are covered (based on traditional or high performance computing - parallel computers or computer networks).
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