【摘要】 为了验证正交频分复用(Orthogonal frequency division multiplex,OFDM)信号雷达的可行性,本文在研究信号产生原理和波形设计方法的基础上,提出了一种基于现场可编程门阵列技术和快速傅里叶变换算法的雷达信号实时产生方案。该方案采用数字可编程技术实现正交多载波调制,信号参数和调制方式具有可重配置的特点,满足多种场合的应用要求。本文针对OFDM信号产生的关键步骤展开讨论,并给出测试结果。外场试验验证了该方案的可行性。更多还原

【Abstract】 To address the feasibility of orthogonal frequency division multiplex(OFDM)radar signal,a real-time OFDM radar signal generator based on field programmable gate array(FPGA)and fast Fourier transform(FFT)algorithm is proposed on research of synthesis and waveform design.Orthogonal multi-carrier modulation is implemented with digital signal processing approach.Signal parameters and the modulation scheme are reconfigurable,and can be adapted to different applications and platforms.The design principle and key steps involved in OFDM signal generation are discussed,and test results are provided.Test shows the feasibility of the OFDM signal generator,which is fundamental for theoretical research and application of OFDM radar systems.更多还原