用FPGA设计调频广播监测频率合成器

对调频广播无线电信号的监管工作中,需要用无线电干涉仪测定电台的方位.与节目内容收测工作只关心信号的振幅和频率参数不同,因为测向工作是测量信号的相位信息,所以作为本机振荡器的频率合成器需要有较高的相位噪声指标.用FPGA设计的频率合成器,采用了小数分频方式,结合FPGA内部设计的CPU软核组成调频广播监测设备.经过在广播电视监测设备中的实际应用,取得了良好的效果.

Frequency Synthesizer for FM Broadcast Monitoring Based on FPGA

Radio interferometer is used to measure the location of the radio station in the supervision of FM radio signals. It is different from program content reception and monitoring, radio interferometer measures the phase information to calculate the direction of the signal. It needs to have a higher technical target of phase noise to work as the local oscillator. To describe the fraction-N synthesizer designed by FPGA with the internal CPU IP core in the FM radio monitoring equipment. This circuit has been successfully applied to the radio and television monitoring equipment.