DMCA
Impact of Multipath Fading and Partial-Band Interference on the Performance of a COFDM/CDMA Modulation Scheme for Robust Wireless Communications
| Citations: | 2 - 0 self |
BibTeX
@MISC{Ormondroyd_impactof,
author = {R F Ormondroyd and E A-susa},
title = {Impact of Multipath Fading and Partial-Band Interference on the Performance of a COFDM/CDMA Modulation Scheme for Robust Wireless Communications},
year = {}
}
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Abstract
The performance of a COFDM’CDM4 radio communication system in the presence of partial-band jamming is presented where the eflects of multipath and additive noise are included The importance of interleaving and coding is emphasised and their impact on the bit error-rate performance is evaluated. In the first part of the paper, the effect of jamming on a COFDA4 system is obtained under worst-case conditions. For single tone jamming, the results show that the effect of the jamming signal on the bit error rate is acceptable, even at signal to jamming power ratios as low as –15dB, when interleaving and convolutional coding is used. For the case where 20 % of the transmission spectrum is corrupted by partial bandjamming, it is necessa ~ for the signal to jamming power ratio to be 5dB or more to achieve an acceptable bit error rate. To provide additional resilience, the case of an 0FDM7CDM4 scheme is examined where the spread-spectrum process gain is used to provide additional protection against jamming.
Keyphrases
robust wireless communication cofdm cdma modulation scheme partial-band interference multipath fading power ratio worst-case condition partial-band jamming first part additive noise spread-spectrum process gain cofdm cdm4 radio communication system bit error rate partial bandjamming additional protection bit error-rate performance single tone jamming convolutional coding transmission spectrum cofda4 system acceptable bit error rate additional resilience
