Wide Band FMCW Signal Genereation Technology

The main study of wide band FMCW signal generation technology,which is application of DDS and DDWS in BP Ground Base radar system,raised the parallelism DDS synthesize signal technique and wave can be equipped DDWS signal generation technique based on FPGA.The parallelism DDS synthesize signal technique based on FPGA starting from the basic principle of DDS implement stable signal generation module in system.The technique’s main design contains lookup table design,frequency control word as well as address control design and parallelism DDS synthesize design.Simulation of the design has been implemented.System requires the problem of amplitude and phase error compensation for parallelism DDS design.Firstly,wave can be equipped DDWS signal generation technique implement the basic principle of DDWS.Then,verifying DDWS initialize wave is realized relying on the system.Main design of this technology includes the overall architecture design,SRIO interface and data transfer.The technique needed for system error compensation.Two kinds of signal generation need to solve some problems,such as high-speed signal generation,wave configuration and large data storage.Study provides high stability,coherence,high spectral purity and low spurious emission signal.The technology can be applied in other FMCW radar system,can also be used as other radar signal generation technology reference design.Signal from study,after implemented in FPGA,is assessed.It is assessed that signal coherence,stray and pulse pressure results of two type of signal generation method,through the digital closed-loop data.Through the system closed-loop data,two kinds of signals compared with the market widely AD9914’s signal.