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Energy Efficient TRDMA over Multipath Channels

Kavya T.S., Sunil Jacob. Published in Wireless.

Communications on Applied Electronics
Year of Publication: 2015
Publisher: Foundation of Computer Science (FCS), NY, USA
Authors: Kavya T.S., Sunil Jacob
10.5120/cae2015651797

Kavya T.S. and Sunil Jacob. Article: Energy Efficient TRDMA over Multipath Channels. Communications on Applied Electronics 2(7):6-11, August 2015. Published by Foundation of Computer Science (FCS), NY, USA. BibTeX

@article{key:article,
	author = {Kavya T.S. and Sunil Jacob},
	title = {Article: Energy Efficient TRDMA over Multipath Channels},
	journal = {Communications on Applied Electronics},
	year = {2015},
	volume = {2},
	number = {7},
	pages = {6-11},
	month = {August},
	note = {Published by Foundation of Computer Science (FCS), NY, USA}
}

Abstract

In recent years, there is an enormous growth in high speed wireless users. Multipath propagation is the transmission of wireless signals from the sender to the receiver through different paths. And these paths are of dissimilar lengths and this result in dissimilar versions of signals reaching at the receiver at dissimilar times. This results in inter-symbol interference by spreading to nearby symbols. Time Reversal Division Multiple Access (TRDMA) is a wireless channel access method which is both energy efficient and low complex is discussed in this paper. TRDMA uses multipath effect to solve the cumbersome issue of inter-symbol interference (ISI). In this technique, energy is concentrated in both spatial and temporal domains. Thus, effective utilization of energy can be made. Multiple user downlink system uses the time reversal structure, where signals from different users are separated by TRDMA. Single transmit antenna with multiple users having single receiving antenna (SISO), Multiple transmit antennas with multiple users having single receiving antenna (MISO) are developed and evaluated. System performance is investigated in terms of achievable sum rate and with outage probability for MISO case. Satisfactory results were obtained through simulation. The simulation for TRDMA was carried out using Matlab software.

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Keywords

Time reversal, inter-symbol interference, Time Reversal Division Multiple Access (TRDMA), spatial focussing effect, temporal focussing effect