本文選題：跟蹤與數(shù)據(jù)中繼衛(wèi)星 + 多目標(biāo)通信　； 參考：《哈爾濱工業(yè)大學(xué)》2014年碩士論文

【摘要】：隨著我國(guó)航天技術(shù)與航天工程的快速發(fā)展，以往以陸基與海基為主的空間通信網(wǎng)很難滿足對(duì)低軌衛(wèi)星通信覆蓋率的要求，同時(shí)也很難實(shí)現(xiàn)多用戶、多任務(wù)的協(xié)調(diào)合作與多信息的處理，這也就要求擴(kuò)展現(xiàn)有的空間通信網(wǎng)絡(luò)以提高網(wǎng)絡(luò)的覆蓋范圍以及多目標(biāo)信號(hào)處理的能力。利用TDRSS（Tracking andData Relay Satellite System，跟蹤與數(shù)據(jù)中繼衛(wèi)星系統(tǒng)），不僅可以通過(guò)大幅提高通信網(wǎng)絡(luò)覆蓋率來(lái)實(shí)現(xiàn)同時(shí)與多個(gè)低軌衛(wèi)星之間全程無(wú)間斷實(shí)時(shí)通信，而且數(shù)據(jù)中繼衛(wèi)星還可以起到在地面站和用戶星之間進(jìn)行數(shù)據(jù)的高速中繼的作用。 未來(lái)空間任務(wù)中，將需要空間站及低軌衛(wèi)星之間的協(xié)同作業(yè)。而要與多個(gè)用戶衛(wèi)星同時(shí)進(jìn)行通信，，則對(duì)每個(gè)衛(wèi)星發(fā)送的信號(hào)來(lái)說(shuō)都會(huì)有來(lái)自其他衛(wèi)星的多址干擾的影響。所以，實(shí)現(xiàn)中繼衛(wèi)星系統(tǒng)對(duì)多個(gè)低軌衛(wèi)星同時(shí)、可靠高速通信與數(shù)據(jù)的傳輸是亟待解決的。本論文將真對(duì)上述問(wèn)題研究中繼衛(wèi)星系統(tǒng)空間S波段多用戶通信的多址干擾抑制技術(shù)。 本文首先對(duì)TDRSS多用戶通信網(wǎng)絡(luò)進(jìn)行了介紹，然后對(duì)其鏈路模型進(jìn)行了計(jì)算。其次，對(duì)TDRSS系統(tǒng)的前向鏈路與返向鏈路的系統(tǒng)的總體框圖進(jìn)行設(shè)計(jì)與分析。再次，確定前向鏈路與返向鏈路的多址干擾抑制方案，并提出了級(jí)聯(lián)的最優(yōu)判決函數(shù)映射與門限分類的返向鏈路多址干擾抑制方案。相比非級(jí)聯(lián)的最優(yōu)判決函數(shù)映射與門限分類的方法性能更加突出。對(duì)前向鏈路與返向鏈路多址干擾抑制算法的誤碼率性能，多用戶容量性能，以及抗遠(yuǎn)近效應(yīng)的能力進(jìn)行了仿真分析，并對(duì)前向與返向鏈路算法的誤碼率性能進(jìn)行對(duì)比，得出兩種算法各自的特點(diǎn)以及分別應(yīng)用于前向鏈路與返向鏈路的可行性。最后，為了滿足TDRSS系統(tǒng)的通信性能的要求，將RS碼與卷積碼的級(jí)聯(lián)編碼運(yùn)用于TDRSS前向與返向鏈路中，極大的降低了系統(tǒng)的誤碼率。
[Abstract]:With the rapid development of space technology and space engineering in our country, the space communication network based on land and sea is difficult to meet the requirements of low orbit satellite communication coverage, and it is also very difficult to realize multi-user. The coordination and cooperation of multi-tasks and the processing of multi-information require the expansion of the existing space communication network to improve the coverage of the network and the ability of multi-target signal processing. With the help of TDRSS(Tracking andData Relay Satellite System, tracking and data relay satellite system, not only can the coverage of communication network be greatly increased, but also the whole uninterrupted real-time communication with multiple Leo satellites can be realized at the same time. And the data relay satellite can also act as a high-speed relay between the earth station and the user satellite. Cooperation between the space station and Leo satellites will be required for future space missions. In order to communicate with multiple user satellites simultaneously, the multiple access interference (mai) from other satellites will affect the signals transmitted by each satellite. Therefore, it is urgent to realize reliable high-speed communication and data transmission for multiple Leo satellites. In this thesis, we will study the multiple access interference (mai) suppression techniques for space S band multiuser communication in relay satellite systems. In this paper, the TDRSS multiuser communication network is introduced, and its link model is calculated. Secondly, the overall block diagram of forward link and back link of TDRSS system is designed and analyzed. Thirdly, the multiple access interference suppression scheme for forward link and back link is determined, and the concatenated optimal decision function mapping and threshold classification are proposed. Compared with the non-cascaded optimal decision function mapping and threshold classification, the performance of the method is more outstanding. The bit error rate (BER) performance, the multi-user capacity performance and the ability to resist the near-far effect of forward link and back link multiple access interference suppression algorithm are simulated and analyzed, and the error rate performance of forward and back link algorithms is compared. The characteristics of the two algorithms and the feasibility of applying them to forward link and back link are obtained. Finally, in order to meet the requirements of communication performance of TDRSS system, the concatenated coding of RS code and convolutional code is applied to the forward and back link of TDRSS, which greatly reduces the bit error rate of the system.
【學(xué)位授予單位】：哈爾濱工業(yè)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

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