The Implementation Of Multiuser Detection For DS-UWB Based On FPGA

Ultra-Wideband (UWB) is a novel short-distance wireless communication technique, which has a wide bandwidth up to GHz and is able to provide a high data rate up to Mbps, thus it becomes a hot spot in current researches. However, there are some key problems must be solved before it is matured, one of which is the hardware implementation of its receiver. It requires not only a good performance, but also a simple structure.In this paper, the develop trends, the basic theory and the multipath channel model of UWB communication are introduced at first. After that, we lay emphasis on the multiuser detection for DS-UWB receiver based on MMSE method and analyze the performance on FPGA. By comparing the receiver's performances using different kinds of adapter algorithm on FPGA , we conclude that LMS algorithm has the lower error rate and simpler calculation than RLS algorithm, therefore, LMS algorithm is chosen to adjust the power in this design. Based on these, received signals are created with the aid of software and the whole receive process is implemented on FPGA. Hereinto a storage scheme which can programme the received data into Flash by the SOPC design method is advanced in this design. In addition, in order to coordinate the different clock frequency between Flash and FPGA, the way of utilizing FIFO and feedback mutually is put forward, which can provide better performance and flexibility for the design.