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- W1999904795 abstract "The Bit Error Rate (BER) expressions of Walsh-Hadamard Transform (WHT) aided Quadrature Amplitude Modulation (QAM) transmitted in impulsive noise environments are derived. It is found that there is a crossover point between the conventional and WHT-aided schemes' BER curves, above which WHT is beneficial in terms of the corresponding BER performance. The exact crossover SNR is analysed and its approximate closed-form expression is derived for a QPSK scheme based on the Chernoff bound. An adaptive WHT scheme is proposed for QAM systems, where the transmitter activates the WHT only when the instantaneous SNR at the receiver is higher than the crossover SNR. The theoretical BER of our adaptive WHT scheme is derived for QAM systems operating over Nakagami-m fading channels. It is found that our adaptive WHT scheme is effective in terms of mitigating the detrimental effects of impulsive noise over the entire SNR range." @default.
- W1999904795 created "2016-06-24" @default.
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- W1999904795 date "2013-07-01" @default.
- W1999904795 modified "2023-09-27" @default.
- W1999904795 title "Adaptive WHT Aided QAM for Fading Channels Subjected to Impulsive Noise" @default.
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- W1999904795 doi "https://doi.org/10.1109/lcomm.2013.052413.130690" @default.
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