| LFMCW radar,with its LPI characteristic and greater advantage over monopulse radar in the ambiguity of range and velocity coupling,has always been an important topic in the radar research field.In the first part of the paper,an overview of the basic conception and constitution of symmetrical triangular LFMCW radar is explained.The ambiguity function of symmetrical triangular frequency modulation continuous wave(STMFCW) signal is analyzed. Form the property of its ambiguity function,it is indicated that using the STFMCW signal can enhance the resolution.FPGA(Filed Programmable Gate Array) is a new and high-performance programmable logic device,is applied widely to the design of radar signal processor.Based on Altera Cyclone series and it's development software,Fast Fourier Transform(FFT),solving modulus and signal processing.It amplifis on the principium and development process of DDS.The exponence of DSP module has been given,and the flow-chart of the programs and illustration of key circuits. |
PDF Full Text Request