An Adaptive Wavelet Modulation Scheme Based on Cognitive Radio
Zheng Fu · Modern Electronics Technique · 2011
An adaptive wavelet modulation scheme based on cognitive radio is proposed for solving the shortcoming of low frequency-band efficiency of wavelet modulation.The weight is adjusted,the power of different noise sensitivity signal is controlled,and the dynamic spectrum allocation is performed by sensing the occupation of channel resource real-timely,using the coloring-based greedy algorithm and achieving the minimum value of mean-square error.The results of simulation implemented in the additive white Gaussian noise channel show that the performance of adaptive wavelet modulation scheme is superior to traditional wavelet modulation.