国产欧美精品一区二区,中文字幕专区在线亚洲,国产精品美女网站在线观看,艾秋果冻传媒2021精品,在线免费一区二区,久久久久久青草大香综合精品,日韩美aaa特级毛片,欧美成人精品午夜免费影视

In order to solve the problem as low positioning accuracy induced by easily influenced by environmental noise and difficult to obtain precise time estimation and angle estimation in the processing of the low intensity radio network signal of the sub nanosecond level represented by the Beidou satellite navigation signal, the Parameter estimation method of low intensity radio network signal receiving spectrum based on sub-nanosecond was proposed in this paper. Firstly, TOA estimation is obtained by constructing the noise space and the sub signal space, as well as the transmitted signal was sampled by the sampling method. Then, the DOA estimation was obtained by using the complex number field mapping and the TOA estimation. Finally, the accuracy of the proposed parameters estimation method was analyzed. Test data shows that:this proposed method had higher accuracy in TOA and DOA estimation; At the same time, he proposed method can effectively maintain the accuracy of parameter estimation in the case of low signal intensity and severe background noise. This technology can effectively reduce the influence of background noise on signal transmission, and has strong practical significance