摘要
航电系统中,软件无线电被认为是实现射频综合的最佳途径。研究了导航信号的射频直接采样方法,对双频段的直接带通采样进行了分析,给出了双频段有效采样频率的计算方法。针对我国北斗卫星1.2GHz和1.5GHz 2个频点附近的导航信号,按照文中给出的直接带通采样频率的计算方法确定了有效的采样频率,并进行了相应的Matlab仿真实验,验证了直接带通采样的可行性。
In avionic systems, software defined radio （SDR） is considered as the best way to implement RF integration. A method of RF direct sampling to navigation signals is studied, and direct bandpass sampling for dual frequency bands is analyzed, and finally a computing method of dual frequency bands effective sampling frequency is given. Considering navigation signals near two frequencies （1.2GHz and 1.5GHz） of Beidou Satellite, the effective sampling frequency is determined according to the presented computing method of direct bandpass sampling frequency, the corresponding simulation test based on Matlab is performed, and the results verify feasibility of direct bandpass sampling.
出处
《火控雷达技术》
2011年第4期61-65,108,共6页
Fire Control Radar Technology
关键词
射频综合
软件无线电
导航信号
直接带通采样
多频段
RF integration
software defined radio（SDR）
navigation signals
direct bandpass sampling
multi-frequency band
