Abstract
Ultra wideband (UWB) is a well known technology in wireless personal area networks (WPANs). Our work analyzes a multiple access code-selected M-ary direct sequence (DS) UWB communication system. The objective is to get a high data rate multiple access M-ary modulation scheme of UWB system. M-ary modulation is obtained by assigning a DS code set to each user, which is different with the traditional M-ary modulation schemes, such as pulse position modulation (PPM) and pulse amplitude modulation (PAM) etc. For this multiple access code-selected M-ary modulation UWB system, with the increase of the modulation level M, we can keep the same number of users, the data transmission rate and the multiple access performance while reduce the required transmitter power. In this paper, the signal processing algorithm is provided and the simulation results prove the efficiency of this multiple access M-ary UWB system.
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