Constrained pre-equalization accounting for multi-path fading emulated using large RC networks: applications to wireless and photonics communications

Afonso, R. J. M., Galvao, R. K. H., Kienitz, K. H., Alyami, H., Becerra, V. M. and Hadjiloucas, S. ORCID: https://orcid.org/0000-0003-2380-6114 (2016) Constrained pre-equalization accounting for multi-path fading emulated using large RC networks: applications to wireless and photonics communications. Optical and Quantum Electronics, 48 (7). 364. ISSN 1572-817X doi: 10.1007/s11082-016-0627-6

Abstract/Summary

Multi-path propagation is modelled assuming a multi-layer RC network with randomly allocated resistors and capacitors to represent the transmission medium. Due to frequency-selective attenuation, the waveforms associated with each propagation path incur path-dependent distortion. A pre-equalization procedure that takes into account the capabilities of the transmission source as well as the transmission properties of the medium is developed. The problem is cast within a Mixed Integer Linear Programming optimization framework that uses the developed nominal RC network model, with the excitation waveform customized to optimize signal fidelity from the transmitter to the receiver. The objective is to match a Gaussian pulse input accounting for frequency regions where there would be pronounced fading. Simulations are carried out with different network realizations in order to evaluate the sensitivity of the solution with respect to changes in the transmission medium mimicking the multi-path propagation. The proposed approach is of relevance where equalization techniques are difficult to implement. Applications are discussed within the context of emergent communication modalities across the EM spectrum such as light percolation as well as emergent indoor communications assuming various modulation protocols or UWB schemes as well as within the context of space division multiplexing.

Item Type	Article
URI	https://reading-clone.eprints-hosting.org/id/eprint/66015
Identification Number/DOI	10.1007/s11082-016-0627-6
Refereed	Yes
Divisions	Life Sciences > School of Biological Sciences > Department of Bio-Engineering Interdisciplinary centres and themes > Computational Sciences Centre
Publisher	Springer
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