超宽带多发多收雷达系统的信号源设计及实现

多发多收超宽带雷达和通信系统是当今研发热点,国内外多有相关报道,而信号源的设计及实现是其关键技术之一。目前用扩频模块来实现GHz 脉冲信号的信号源,结构复杂、成本高。对此,设计和制作了一款由可编程逻辑器件FPGA 和DDS 芯片组成并产生GHz 脉冲信号的信号源,其核心是ADI公司的DDS芯片AD9914和Xilinx公司的Kintex-7系列FPGA芯片作控制芯片,此信号源获得了高达1.4 GHz的大带宽多通道同步雷达脉冲信号,频率切换时间达到ns级,且频率、相位和幅值都可控,其性能在国内具有先进性,并具有实际应用价值。

Design and Realization of Signal Source for Ultra-wideband MIMO Radar System

MIMO UWB Radar and Communication System is one of the hot development points today, and there are many relevant reports at home and abroad. The design and implementation of signal source is one of the key technologies. In view of the high complexity and high cost of the signal source which uses the spread spectrum module to realize the GHz pulse signal, this paper design and produce a signal source composed of FPGA and DDS chip to generate GHz pulse signal. The core devices are ADI Co.''s AD9914 DDS chip and Xilinx Co.''s Kintex-7 series FPGA chip. This signal source can generate up to 1.4 GHz large bandwidth multi-channel synchronous radar pulse signal, frequency switching time reaches ns level,and frequency, phase and amplitude are all controllable. It has practical value with the advanced performance at home.