【摘要】：地球同步衛(wèi)星上行信號(hào)源定位有多種方法,目前最常用的是雙星定位體制,利用兩顆衛(wèi)星轉(zhuǎn)發(fā)信號(hào)過(guò)程中引起的時(shí)間差(DTO)和頻率差(DFO)實(shí)現(xiàn)對(duì)發(fā)射站的定位,另外還有單星、多星等體制也可以實(shí)現(xiàn)定位。這些體制都無(wú)需解調(diào)和解密就可以完成定位,不但可以在衛(wèi)星安全防護(hù)中用于干擾源定位,而且可以應(yīng)用到地面目標(biāo)的上行信號(hào)源定位,產(chǎn)生目標(biāo)態(tài)勢(shì)情報(bào)。對(duì)于雙星定位體制而言,系統(tǒng)在突發(fā)事件中尋找滿足雙星條件的鄰星有很大難度,于是,我們有意在低軌或地面升空平臺(tái)中尋找合適的主動(dòng)設(shè)備進(jìn)行輔助定位,利用系留氣球搭載轉(zhuǎn)發(fā)設(shè)備構(gòu)造主動(dòng)鄰星的方法就應(yīng)運(yùn)而生了。本文先建立了星—球組合的定位系統(tǒng)模型,討論了其用于上行信號(hào)源定位的可行性,提出了該系統(tǒng)對(duì)于定位參數(shù)的精度要求；然后在仿真產(chǎn)生上行信號(hào)和參考信號(hào)的基礎(chǔ)上,利用傳統(tǒng)的互模糊函數(shù)的方法提取了時(shí)差頻差(DTO、DFO)參數(shù),并從實(shí)際系統(tǒng)出發(fā),提出了一種基于調(diào)制域的時(shí)頻分離的參數(shù)估計(jì)方法,實(shí)現(xiàn)了定位參數(shù)的快速準(zhǔn)確提�。唤酉聛�(lái)利用參數(shù)估計(jì)的結(jié)果構(gòu)成定位方程組,偽線性化求解方程組、迭代算法提高精度,再?gòu)男孪到y(tǒng)自身特點(diǎn)出發(fā),在有效定位區(qū)域里用網(wǎng)格查表法定位；最后,從廣義目標(biāo)定位誤差出發(fā),分析了在實(shí)際星—球定位中,影響定位的幾點(diǎn)因素,形成誤差橢圓。本文的研究成果將直接應(yīng)用于星—球定位平臺(tái)的構(gòu)建和系統(tǒng)試驗(yàn)中,為下一步搭載主動(dòng)鄰星系統(tǒng)的研制奠定理論和實(shí)踐基礎(chǔ)。
[Abstract]:There are many methods to locate the uplink signal source of geosynchronous satellite. At present, the most commonly used method is the dual satellite positioning system, which uses the time-difference (DTO) and the frequency-difference (DFO) caused by the two satellites to transmit the signal to realize the location of the transmitting station. In addition, there are single-star, multi-star system can also achieve positioning. These systems can be used not only for jamming source location in satellite security protection, but also for uplink signal source location of ground target, which can generate target situation information. For the binary satellite positioning system, it is very difficult for the system to find the neighbor that satisfies the binary satellite condition in the emergency. Therefore, we intend to find suitable active equipment in the low orbit or ground launching platform for auxiliary positioning. The method of constructing active neighbor star by means of carrying and forwarding equipment in tethered balloon emerges as the times require. In this paper, the positioning system model of the combination of star and ball is established, and the feasibility of using it to locate the uplink signal source is discussed, and the accuracy requirements of the system for positioning parameters are put forward. Then, on the basis of generating uplink signal and reference signal by simulation, the time difference frequency difference (DTO,DFO) parameters are extracted by using the traditional method of mutual ambiguity function, and based on the actual system, the time difference frequency difference (DTO,DFO) parameter is extracted. A parameter estimation method of time-frequency separation based on modulation domain is proposed, which can extract the location parameters quickly and accurately. Then using the results of parameter estimation to form the positioning equations, pseudo-linearization solution equations, iterative algorithm to improve the accuracy, and then according to the characteristics of the new system, in the effective location area using the grid lookup table method. Finally, based on the generalized target positioning error, the error ellipse is formed by analyzing several factors that affect the positioning in actual star-sphere positioning. The research results in this paper will be directly applied to the construction and system test of the star-sphere positioning platform, which will lay a theoretical and practical foundation for the next step to develop the active neighbor satellite system.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN927.2
，

本文編號(hào)：2387881