Bandwidth efficient MT-DS-SS via reduced subcarrier frequency spacing

Citation data:

Wireless Personal Communications, ISSN: 0929-6212, Vol: 43, Issue: 4, Page: 1419-1433

Publication Year:
2007
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Repository URL:
https://scholarcommons.sc.edu/elct_facpub/354
DOI:
10.1007/s11277-007-9316-x
Author(s):
Sen, Indranil; Matolak, David W
Publisher(s):
Springer Nature
Tags:
Computer Science; Engineering; Spread spectrum; Multicarrier modulation; Dispersive channel; Electrical and Computer Engineering; Signal Processing; Systems and Communications; VLSI and Circuits, Embedded and Hardware Systems
article description
We investigate modifications to conventional multitone direct-sequence spread spectrum (MT-DS-SS) signaling to improve spectral efficiency, for high-data-rate systems with small processing gain. Reduction in subcarrier frequency spacing to half the symbol rate improves bandwidth efficiency at no cost in complexity or performance. Via both analysis and simulations, we provide example results that illustrate the attractive performance and throughputs attainable with reduced frequency spacing. We extend study to synchronous multiuser transmission, and show that our best spectrally efficient MT-DS-SS scheme outperforms the conventional MT-DS-SS in a dispersive multiuser environment. © 2007 Springer Science + Business Media LLC.