OCC Based Code-selected High Efficient Modulation in UWB System

초록

We propose the orthogonal complementary code (OCC) based code-selected high efficient ultra wideband (UWB) modulation scheme over multipath channel in the paper, where the OCC with perfect correlation properties is employed to spread spectrum and also to carry the information bits and the theoretical analysis is obtained based on the moment generating function (MGF). In this scheme, the information bits can be conveyed in two ways, such as being modulated by common modulation schemes and being used to select the spread code to improve the transmission rate through code-selected scheme. Rake receiver and OCC are adopted to collect multipath components and reduce the interferences caused by multipath channel for better system performance. The closed-form system bit error rate (BER) is obtained through MGF. Simulation results and analysis also show the efficiency of the proposed high efficient modulation scheme in different channel models and various numbers of OCC code flocks.