本文選題：全球衛(wèi)星導(dǎo)航系統(tǒng)　切入點：信號體制　出處：《電子科技大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：全球衛(wèi)星導(dǎo)航系統(tǒng)(Global Navigation Satellite Systems,GNSS)是對全球定位系統(tǒng)(GPS)、格洛納斯系統(tǒng)(Gloanass)和伽利略系統(tǒng)(Galileo)等單個衛(wèi)星導(dǎo)航定位系統(tǒng)的統(tǒng)一稱謂,也可代指它們的的增強型系統(tǒng),其成員還包括我國北斗(Bei Dou)導(dǎo)航系統(tǒng)、日本的準天頂系統(tǒng)(QZSS)和印度區(qū)域?qū)Ш较到y(tǒng)(IRNSS)等還在開發(fā)的衛(wèi)星導(dǎo)航系統(tǒng)。做為導(dǎo)航系統(tǒng)最為關(guān)鍵的部分,導(dǎo)航信號體制決定了導(dǎo)航系統(tǒng)的先天性能,對系統(tǒng)間的兼容性有著決定性的影響。因此,無論在新系統(tǒng)的建設(shè)還是GPS代化過程中,信號體制的設(shè)計都是各個GNSS所關(guān)注的焦點。由于GNSS的飛速發(fā)展,以及國際電信聯(lián)盟對導(dǎo)航信號帶寬的限制,各個導(dǎo)航系統(tǒng)間兼容性的問題也必然存在。兼容性也作為衛(wèi)星導(dǎo)航系統(tǒng)共存和系統(tǒng)間互操作的前提一直是國際頻率協(xié)調(diào)的重點。本論文分為兩個部分:第一部分對GNSS信號體制從頻率結(jié)構(gòu)設(shè)計、波形設(shè)計等出發(fā)進行了研究,研究了兼容性評估方法。在此基礎(chǔ)上,第二部分從波形上研究了BOC類信號調(diào)制方法,對GNSS信號中非恒包絡(luò)的問題,提出一種對標準Alt BOC改進而來的恒包絡(luò)信號調(diào)制方法,闡述了恒包絡(luò)產(chǎn)生調(diào)制原理,建立時域和頻域模型,給出了調(diào)制和初步解調(diào)方法,并假設(shè)運用在北斗B2頻段時,分析了其帶外損耗、碼跟蹤能力、抗多徑性能、抗干擾性能和兼容性。本論文的主要研究內(nèi)容和貢獻如下:對GPS、Galileo和北斗信號體制進行了分析,從從信號多址選擇、頻率規(guī)劃、偽碼、信號波形和導(dǎo)頻信號角度分析總結(jié)了信號體制設(shè)計思想,研究了GNSS信號兼容性分析方法,詳細分析了BOC調(diào)制、恒包絡(luò)Alt BOC調(diào)制和TD-Alt BOC調(diào)制原理,為北斗導(dǎo)航信號體制的建設(shè)和新型導(dǎo)航信號的建立奠定了基礎(chǔ)。建立了新型恒包絡(luò)PS-Alt BOC信號的時域模型和功率譜密度模型,解決了信號的非恒包絡(luò)問題,分析了PS-Alt BOC調(diào)制的帶外損耗性、碼跟蹤性能、抗多徑性能、抗干擾性能。并假設(shè)用于北斗B2頻段時與同頻段的其他GNSS系統(tǒng)的兼容性。分析結(jié)果為北斗系統(tǒng)設(shè)計新型信號調(diào)制的可行性提供了理論支撐。
[Abstract]:The Global Navigation Satellite Systems GNSS is a unified term for single satellite navigation and positioning systems such as GPS, Gloanassand Galileo, and may also refer to their enhanced systems. Its members also include satellite navigation systems still under development, such as the Bei Doui navigation system, the quasi-zenith system in Japan, and the Indian regional navigation system, IRNSS. as the most critical part of the navigation system, Navigation signal system determines the innate performance of navigation system and has a decisive effect on the compatibility between systems. The design of signal system is the focus of all GNSS. Due to the rapid development of GNSS and the limitation of the bandwidth of navigation signal by the International Telecommunication Union, Compatibility among navigation systems must also exist. Compatibility is always the focus of international frequency coordination as the premise of coexistence and interoperation of satellite navigation systems. This paper is divided into two parts: the first part. The design of GNSS signal system from frequency structure, Based on the research of waveform design, the compatibility evaluation method is studied. In the second part, the modulation method of BOC signal is studied from the waveform, and the problem of non-constant envelope of GNSS signal is discussed. An improved modulation method for constant envelope signal based on standard Alt BOC is proposed. The modulation principle of constant envelope generation is expounded, the time-domain and frequency-domain models are established, the modulation and preliminary demodulation methods are given, and the method is assumed to be applied in Beidou B2 band. Its out-of-band loss, code tracking ability, anti-multipath performance, anti-jamming performance and compatibility are analyzed. The main research contents and contributions of this paper are as follows: the analysis of GPS Galileo and Beidou signal system, from the signal multiple access selection, frequency planning, Pseudo-code, signal waveform and pilot signal angle analysis, the design idea of signal system is summarized, the compatibility analysis method of GNSS signal is studied, and the principles of BOC modulation, Alt BOC modulation and TD-Alt BOC modulation are analyzed in detail. It lays a foundation for the construction of Beidou navigation signal system and the establishment of new navigation signal. The time-domain model and power spectral density model of a new type of constant envelope PS-Alt BOC signal are established, and the non-constant envelope problem of the signal is solved. The out-of-band loss, code tracking and anti-multipath performance of PS-Alt BOC modulation are analyzed. The anti-jamming performance and compatibility between Beidou B2 band and other GNSS systems with the same frequency band are assumed. The results provide theoretical support for the feasibility of Beidou system to design new signal modulation.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN967.1
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本文編號：1585191