導(dǎo)航衛(wèi)星有效載荷非理想特性研究
發(fā)布時(shí)間:2019-06-04 04:11
【摘要】:為了衡量星上有效載荷核心器件的非理想特性對(duì)導(dǎo)航信號(hào)性能的影響,將相關(guān)損耗、鑒別器曲線過(guò)零點(diǎn)偏移和鑒別器曲線斜率失真作為評(píng)估指標(biāo),通過(guò)仿真評(píng)估了理想導(dǎo)航信號(hào)通過(guò)濾波器和高功放之后的信號(hào)質(zhì)量,分析了信號(hào)的碼跟蹤精度和載波跟蹤精度.仿真結(jié)果表明:同一濾波器對(duì)不同調(diào)制方式的信號(hào)有著不同的影響;高功放帶來(lái)的過(guò)零點(diǎn)偏移的影響比濾波器小4個(gè)數(shù)量級(jí),但是會(huì)帶來(lái)明顯的帶外功率損耗.
[Abstract]:In order to measure the influence of non-ideal characteristics of on-board payload core devices on navigation signal performance, correlation loss, zero-crossing offset of discriminator curve and slope distortion of discriminator curve are taken as evaluation indexes. The signal quality of ideal navigation signal passing through filter and high power amplifier is evaluated by simulation, and the code tracking accuracy and carrier tracking accuracy of the signal are analyzed. The simulation results show that the same filter has different effects on the signals of different modulation methods, and the influence of zero-crossing offset caused by high power amplifier is four orders of magnitude smaller than that of the filter, but it will bring obvious out-of-band power loss.
【作者單位】: 北京跟蹤與通信技術(shù)研究所;華中科技大學(xué)電子與信息工程系;
【基金】:國(guó)家重大科技專項(xiàng)基金資助項(xiàng)目(ZX03010105)
【分類號(hào)】:TN96.1
本文編號(hào):2492464
[Abstract]:In order to measure the influence of non-ideal characteristics of on-board payload core devices on navigation signal performance, correlation loss, zero-crossing offset of discriminator curve and slope distortion of discriminator curve are taken as evaluation indexes. The signal quality of ideal navigation signal passing through filter and high power amplifier is evaluated by simulation, and the code tracking accuracy and carrier tracking accuracy of the signal are analyzed. The simulation results show that the same filter has different effects on the signals of different modulation methods, and the influence of zero-crossing offset caused by high power amplifier is four orders of magnitude smaller than that of the filter, but it will bring obvious out-of-band power loss.
【作者單位】: 北京跟蹤與通信技術(shù)研究所;華中科技大學(xué)電子與信息工程系;
【基金】:國(guó)家重大科技專項(xiàng)基金資助項(xiàng)目(ZX03010105)
【分類號(hào)】:TN96.1
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