Multiple-level parallel detection in ultra-wideband transmitted reference systems

On the basis of ultra-wideband (UWB) block-structured transmitted reference (TR) technology, a new multiple-level parallel detection scheme was proposed in this paper. Resorting to the scheme, the ideal pulse received waveform was estimated with the joint use of the reference frames, data frames and the previous-level soft decision of the unknown data symbols. The received pulse waveform information contained in data frames is used to obtain the optimal correlation template, and the bit error rate performance is improved level by level. The performance lower bounds of the detection algorithm for arbitrary block structure are investigated via the moment generating function and its integration of the quadratic forms of random variables. Simulation results using the IEEE 802.15.3a indoor multipath channel models reveal that the new detection scheme outperforms the conventional TR technology and other block-structured TR detection schemes. Some more conclusions about the structure and the length of data blocks are derived from the simulation and lower bound analysis.