CAJ | 학술논문

提出了一种基于FIR滤波器的卫星导航抗干扰天线数字信号正交分解方法。首先，根据卫星导航信号在抗干扰天线中的中频中心频率及带宽信息确定带通滤波器的通带、阻带响应以及滤波器阶数等参数。接下来，采用Parks-McClellan算法分别设计滤波系数偶对称和奇对称的带通滤波器。最后，将抗干扰天线中AD采样后的中频数字实信号分别通过以上偶对称和奇对称的带通滤波器即可得到 I、Q 两路信号。本文所提方法具有计算量小、精度高且易于工程实现的特点。通过对实测数据分析验证了本文所提方法的有效性。
제출료일충기우FIR려파기적위성도항항간우천선수자신호정교분해방법。수선，근거위성도항신호재항간우천선중적중빈중심빈솔급대관신식학정대통려파기적통대、조대향응이급려파기계수등삼수。접하래，채용Parks-McClellan산법분별설계려파계수우대칭화기대칭적대통려파기。최후，장항간우천선중AD채양후적중빈수자실신호분별통과이상우대칭화기대칭적대통려파기즉가득도 I、Q 량로신호。본문소제방법구유계산량소、정도고차역우공정실현적특점。통과대실측수거분석험증료본문소제방법적유효성。
A digital orthogonal decomposition method for satellite navigation anti-jammer antennas is proposed in this paper based on FIR filters. Firstly, the responses of pass-band, stop-bands and the number of filter orders are determined according to the intermediate frequency and bandwidth of the satellite navigation signals. Then, an odd symmetrical FIR filter and an even symmetrical FIR filter are designed by using the Parks-McClellan algorithm. Finally, I channel signals and Q channel signals can be got by filtering the real intermediate frequency output from the AD converters using the odd symmetrical FIR filter and the even symmetrical FIR filter respectively. The method proposed in this paper has less computation load and suits realization in projects. The testing results verify the effectiveness and practicability of the method in this paper.