Dynamic Spectrum Access Communications: Wavelet Modulation with Unequal Power Allocation

Abstract

In this chapter, we propose adaptive Wavelet Modulation ({WM}) to exploit available resources of the channel, avoiding interferences with the primary users of the spectrum. We present a technique based on an unequal power allocation on the transmitted data according to both their sensitivity to channel errors and channel availability. Genetic Algorithms are used to optimize weights with the constraint of average energy per bit remaining unaffected.