Multicode high-speed transmission for wireless mobile communication

We describe a technique for the high-speed transmission of data in wireless personal communications which we denote as multicode modulation. In this technique, the high-rate bit transmitted data is serial to parallel converted into low-rate bit streams in a similar fashion to multicarrier or multitone modulation. However, in contrast to the multicarrier method, we modulate each low-rate bit stream using direct-sequence spread-spectrum on a single carrier. To illustrate the potential and merits of the proposed method as an alternative technique for high-speed transmission for wireless personal communications, various simulation results over multipath fading channels are presented.