Implementation Of FFT Algorithm For UWB Signal Acquisition Based On FPGA

Recently UWB technology has become one of the hotest points of research on wireless communication, and the controversy focus on the standard of the protocol of short-range wireless communication. The acquisition and synchronization of UWB signal is one of the most parts in the system of UWB, so many people show great zeal for it.This dissertation is supported by National Natural Science Foundation of China"Key technology and theoretic of Ultra–Wideband wireless communications". As the band-width of the UWB system increased, the very low pulse energy disperse to several ten even up to 100 dense paths, making the traditional correlator method take too long time to operate in FPGA, so here we consider that how to design a method of the acquisition and synchronization of UWB signal which based on fixed geometric structure FFT, and make it implement on the FPGA.Totally speaking, the dissertation includes the following parts:(1)It studied the basic theory of UWB, analyzed how the channel of UWB influence the UWB acquisition and synchronization system.(2)According to the characteristic of UWB channel, a method of the the acquisition and synchronization of UWB signal which based on the theory of FFT is disscussed.(3)On the foundation of the principle of fixed geometric structure FFT method, a high-speed and high-order pipeline method FFT is introduced and simulated in MATLAB.(4)According to the functional and technical requirements for the high-speed and high-order pipeline method FFT, the acquisition algorithm is implemented using FPGA, the design flow is given in detail, and the algorithm is validated the correctness and feasibility by comparing hardware timing simulation waveform with MATLAB simulation result.