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fbtwitterlinkedinvimeoflicker grey 14rssslideshare1
Publisher: IEEE
Languages: English
Types: Article
Subjects: TK
Molecular communications via Diffusion (MCvD) represents a relatively new area of wireless data transfer with\ud especially attractive characteristics for nano-scale applications. Due to the nature of diffusive propagation, one of\ud the key challenges is to mitigate inter-symbol interference (ISI) that results from the long tail of channel response.\ud Traditional coherent detectors rely on accurate channel estimations and incur a high computational complexity.\ud Both of these constraints make coherent detection unrealistic for MCvD systems. In this paper, we propose a\ud low-complexity and non-coherent signal detector, which exploits essentially the local convexity of the diffusive\ud channel response. A threshold estimation mechanism is proposed to detect signals blindly, which can also adapt\ud to channel variations. Compared to other non-coherent detectors, the proposed algorithm is capable of operating\ud at high data rates and suppressing ISI from a large number of previous symbols. Numerical results demonstrate\ud that not only is the ISI effectively suppressed, but the complexity is also reduced by only requiring summation\ud operations. As a result, the proposed non-coherent scheme will provide the necessary potential to low-complexity\ud molecular communications, especially for nano-scale applications with a limited computation and energy budget
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