Wavelet-Packet-Based Multiple Access Communication

We explore the role that the wavelet packet transform can play in increasing multiple access communication throughput via waveform design and receiver design. Wavelet packets ooer a exible framework which allows us to select and reene signature waveforms at intermediate time-frequency levels leading to the development of eecient methods for near optimal receiver implementation. The optimal receiver will jointly demodulate all of the received waveforms and has a complexity which is exponential in the number of users, while a suboptimal version will attempt to do the same with a greatly reduced computational complexity. We believe that our wavelet packet recursive joint detection system described in this paper ooers a good alternative approach to existing comparable methods. Speciically, our preliminary analysis and simulation results indicate the potential for a marked computational improvement over the optimal detector and additional exibility and eeciency over other proposed joint detection schemes for multiple access communication.