Wavelet-packet-based multiple-access communication
Rachel E. Learned, A. Hamid Krim, Bernhard E. H. Claus, Alan S. Willsky, William Clem Karl · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1994
We explore the role that the wavelet packet transforms can play an increasing multiple access communication throughput via waveform design and receiver design. Wavelet packets offer a flexible framework which allows us to select and refine signature waveforms at intermediate time-frequency levels leading to the development of efficient 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 offers a good alternative approach to existing comparable methods. Specifically, our preliminary analysis and simulation results indicate the potential for a marked computational improvement over the optimal detector and additional flexibility and efficiency over other proposed joint detection schemes for multiple access communication.