Research On Mutiple Modes Radar Signal Generation Techniques

Radar signal generation techniques in radar systems play an important role. With the development of radar countermeasures techniques, the radar signal's performance is required to be higher and higher, and the radar signal generation techniques have entered the digital and integrated high-speed development period. The use of FPGA and dedicated quadrature digital upconverter chip approach can not only produce complex radar signals, but also avoid nonlinear distortion that analog devices make an impact on the signal because of the signal modulation and the primary mixer are accomplished in the digital field. In the case where the signal bandwidth meets the system requirements, this method has the advantage both in the terms of signal generation and project implementation.This paper describes several theoretical basis of signal generation commonly used in radars. Then the paper gives hardware design and logic design of the waveform generation board's each module. By optimizing the circuit design, electromagnetic analysis, power analysis, the board's hardware implementation is improved. System test results show that the power consumption, stability, signal to noise ratio and versatility meet the system requirements.