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1 Information Efficiency and Transmission Range Optimization for Coded MIMO FH-CDMA Ad Hoc Networks in Time-Varying Environments
BibTeX
@MISC{Sui_1information,
author = {Haichang Sui and James R. Zeidler},
title = {1 Information Efficiency and Transmission Range Optimization for Coded MIMO FH-CDMA Ad Hoc Networks in Time-Varying Environments},
year = {}
}
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Abstract
Optimization of the transmission range in terms of maximizing information efficiency is studied in this paper for mobile ad hoc networks (MANETs) with frequency-hopped (FH) CDMA and multiple antennas. Realistic channel models are employed to account for path-loss, log-normal shadowing, and Rayleigh fading. The shadowing and fading are assumed time-varying with different time-scales due to mobility and hopping. The receiver employs decision-feedback demodulation for differential unitary space-time modulation and erasure insertion decoding for Reed-Solomon codes [14] [15]. The decoding error probability is derived based on distributions of the multiple access interference power and the signal-tointerference ratio in a dwell for ground propagation model. The trade-off between information efficiency and transmission range is studied in detail and insight is obtained into the impact of various factors, including the spreading gain, modulation and coding schemes, feedback length, erasure insertion, order of spatial diversity, time-variation of the shadowing, and channel statistics such as Doppler frequency and shadowing spread. Index Terms MIMO, frequency-hopped (FH) CDMA, erasure insertion, mobile ad hoc network (MANET), information efficiency, optimum transmission range, Gaussian quadrature I.
Keyphrases
information efficiency transmission range optimization time-varying environment erasure insertion mobile ad hoc network transmission range signal-tointerference ratio multiple antenna log-normal shadowing gaussian quadrature decision-feedback demodulation realistic channel model multiple access interference power doppler frequency reed-solomon code rayleigh fading spreading gain ground propagation model index term mimo optimum transmission range spatial diversity various factor error probability different time-scales feedback length differential unitary space-time modulation
