In the array signal simulation technology of the global navigation satellite sys-tem (GNSS) ,the analysis of transmission environment and antenna elements mismatch char-acteristics is very important .The traditional array signal simulation technology uses an ideal model ,and can not simulate the effect of the transmission environment and antenna elements mismatch characteristics on the array signals .Proposed a method to estimate the transmis-sion environment and antenna elements mismatch characteristic ,and analysed its perform-ance .Completed an experiment in the case of a single low elevation interference .T he results showed that the transmission environment and antenna elements mismatch characteristic was fluctuant with frequency , the largest value of the amplitude mismatch fluctuation was 9.2dB ,the largest value of the phase mismatch fluctuation was 96.5 ° ,reflecting the fidelity of the array signal simulator based on an ideal model was not high .The result of this paper has some guiding significance to improve the fidelity of the GNSS array signal simulation .%在全球卫星导航系统(GNSS)阵列信号模拟技术中 ,对传输环境和天线阵元引起的失配特性分析是很重要的一步.传统的阵列信号模拟技术采用理想模型 ,无法模拟传输环境和天线阵元的失配特性对阵列信号的影响.本文提出了一种估计传输环境和天线阵元失配特性的方法,并分析了其性能.在单干扰低仰角情况下进行实验 ,实验结果表明:由传输环境和天线阵元引起的失配特性随频率波动 ,其中幅度失配的最大波动值为9. 2 dB ,相位失配的最大波动值为96. 5 ,反映出基于理想模型的阵列信号模拟器的逼真度不高的缺点 ,本文研究成果对提高GNSS阵列信号模拟的逼真度有一定的指导意义.
展开▼
