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Performance analysis of the effect of pulsed-noise interference on WLAN signals transmitted over a Nakagami fading channel

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Author
Tsoumanis, Andreas
Date
2004-03
Advisor
Robertson, R. Clark
Second Reader
Wadsworth, Donald
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Abstract
of IEEE 802.11a standard. The signal is subject to pulsednoise jamming, when either the desired signal alone or the desired signal and the jamming signal are subject to Nakagami fading. As expected, the implementation of forward error correction (FEC) coding with soft decision decoding (SDD) and maximumlikelihood detection improves performance as compared to uncoded signals. In addition, the combination of maximum-likelihood detection and error correction coding renders pulsed-noise jamming ineffective as compared to barrage noise jamming. When the jamming signal encounters fading as well, we assume that the average jamming power is much greater than the AWGN power. For uncoded signals, a jamming signal that experiences fading actually improves performance when the parameter of the information signal s m is less than or equal to one. Surprisingly, for larger values of s m a jamming signal that experiences fading works in favor of the information signal only for small signal-tointerference ratio (SIR). When SIR is large, performance when the jamming signal experiences fading is worse relative to performance when the jamming signal does not experience fading. For error correction coding with SDD, we investigate only continuous jamming since it is by far the worst-case. Moreover, while we consider a range of fading conditions for the jamming signal, we examine only Rayleigh fading of the information signal. The coded signal, when the jamming signal experiences severe fading, performs better relative to the case when the jamming signal does not experience fading.
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http://hdl.handle.net/10945/1622
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