Channel codes for mitigating intersymbol interference in diffusion-based molecular communications
Journal
GLOBECOM - IEEE Global Telecommunications Conference
Pages
4228-4232
Date Issued
2012
Author(s)
Abstract
Molecular communications emerges as a promising scheme for communication between nanoscale devices. In diffusion-based molecular communications, molecules as information symbols are released by transmitters and diffuse in the fluid or air environments to transmit messages. Under the diffusion channel modeled by Brownian motion, information sequences suffer from molecule crossovers, i.e., molecules released at an earlier time may arrive later, causing intersymbol interference (ISI). In this paper, we investigate practical channel codes for combating ISI. An ISI-free coding scheme is proposed to increase the communication reliability while keeping the encoding/decoding complexity reasonably low. We exemplify an ISI-free code and theoretically approximate its bit error rate (BER) performance. In addition, repetition codes are revisited out of the complexity concern and proved to be desirable. The BER approximations of the repetition code family are given as well. Compared with convolutional codes, the proposed ISI-free code and repetition codes offer comparable performance with much lower complexity for diffusion-based molecular communication systems.
Other Subjects
Bit error rate (BER) performance; Communication reliabilities; Diffusion channels; Encoding/decoding; Information sequences; Information symbol; Molecular communication; Nanoscale device; Air; Brownian movement; Channel coding; Communication; Convolutional codes; Diffusion; Molecules; Intersymbol interference
Type
conference paper