A Multi-Layer Orthogonal Block Coded Transmission Scheme for Noncoherent Ultra-Wideband Communications

A multi-layer orthogonal block coded transmission scheme is proposed in this paper to enhance the performance of the noncoherent Ultra-Wideband impulse radio (UWB-IR) system. The design employs a novel Multiple Orthogonal Block Coded Modulation (MOBCM), which transmits multiple information bearing orthogonal codewords with an ingenious layered structure. At the receiver side, a correspondent noncoherent multiple codeword detection technique is developed to jointly detect multiple codewords and exploit the high energy efficiency inherent in the MOBCM. Solid performance gain is achieved and our design reduces the general performance gap between noncoherent and coherent receiver for UWB-IR system.