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Adaptive quantization for spectrum exchange information in mobile cognitive radio networks
International Journal of Electrical and Computer Engineering (IJECE)
To reduce the detection failure of the exchanging signal power onto the OFDM subcarrier signal at uniform quantization, dynamic subcarrier mapping is applied. Moreover, to addressing low SNR's wall-less than pre-determine threshold, non-uniform quantization or adaptive quantization for the signal quantization size parameter is proposed. μ-law is adopted for adaptive quantization subcarrier mapping which is deployed in mobility environment, such as Doppler Effect and Rayleigh Fading propagation.doi:10.11591/ijece.v10i4.pp3605-3614 fatcat:onatfvtakjdnhmmigmqhwwetka