Home // ICSNC 2011, The Sixth International Conference on Systems and Networks Communications // View article

Improving Spectral Efficiency of Spread Spectrum Systems Under Peak Load Network Conditions

Authors:
Moses Ekpenyong
Joseph Isabona

Keywords: Frequency reuse; interference suppression; coding and modulation; spread spectrum; spectral efficiency

Abstract:
In this contribution, we study the spectral efficiency performance of spread spectrum networks, where the networks are generalized to consider the frequency reuse factor and arbitrary processing gain resulting from in-cell interference, which adds undue penalties in the form of network cost. We observed that interference cost generates an increase in the received efficiency relative to frequency division multiple access (FDMA), weighted against a reduction in the signal requirement resulting from using the code division multiple access (CDMA) network. In particular, we focus on spectral efficiency optimization by studying realistic FDMA and CDMA networks operating in Nigeria. Performance models for both case studies are also proposed and simulated using observed data means as model predictors. We discovered that bandwidth effects of channel coding, modulation and spread spectrum do have impact on the spectral efficiency and the received power by all users under peak load conditions, thus necessitating the need for efficient coding and modulation and rate adaptation techniques as feasible solutions for improving channel capacity and efficiency of the scarce radio spectrum.

Pages: 1 to 8

Copyright: Copyright (c) IARIA, 2011

Publication date: October 23, 2011

Published in: conference

ISSN: 2163-9027

ISBN: 978-1-61208-166-3

Location: Barcelona, Spain

Dates: from October 23, 2011 to October 29, 2011