Multi-carrier modulation and multi-scaling distinguishable system based on adaptive orthogonal wavelet packet

To satisfy the request of high bandwidth efficiency and multi-rate for next generation communication system, a time-space scaling distinguishable multi-carrier modulation system based on adaptive orthogonal wavelet packet method is proposed for OFDM-DS/CDMA system. Not only does wavelet packet division multiplexing realize the time-space multi-scaling, super distinguishable and multi-rate modulation, but also do adaptive orthogonal wavelet packet has the optimization algorithm of minimize computational complexity. Compared with traditional OFDM system, the consequence is that the algorithm has fast convergence and essentially achieves optimal performance. An important feature of the time-space multi-rates modulation system is the use of wavelet packet decomposition and re-composition instead of the modulation and demodulation of the signal as a sufficient statistic.