Design Of A Wideband Modulation Pulse Signal Receiving And Processing System

With the rapid revolution and development of the information industry,the requirements for the processing rate,transmission bandwidth and quality of wideband digital intermediate frequency receivers are higher and higher in related industries,which significantly increases the speed requirement of hardware processing.The traditional structure of serial digital signal processing can no longer meet the demand.Design of algorithmic parallel processing architecture is imperative,which greatly speeds up the data processing speed.From the engineering point of view,theoretical researches and hardware logic design of parameter estimation,parameter reconstruction and time delay control for linear frequency modulation(LFM)signal are presented.The main contents are as follows:(1)Research and implementation of LFM signal parameter estimation algorithm.Through studying the discrete polynomial-phase transform(DPT)algorithm for LFM signal and analyzing the advantages and disadvantages of the algorithm and its applicability,the estimation of the initial frequency and bandwidth of LFM signal is realized.Additionally,the research through frequency offset correction algorithm improves the accuracy of LFM signal parameter estimation.(2)Research and implementation of signal parameter reconstruction algorithm.Through the research of traditional processing algorithms,a reliable signal parameter reconstruction algorithm based on farrow structure carried out the reconstruction of signal frequency and bandwidth.(3)Research and implementation of controllable delay design for high rate data.After the analysis and summary of the controllable delay design scheme,a delay design scheme which meets the requirements of high speed,wide bandwidth,adjustment and long time is put forword to achieve the data time discontinuity and spatial continuity design based on SDRAM storage scheme.Finally,each module has been tested and verified on the hardware platform.The results show that the design can meet the requirements of receiving and processing.