鄰近空間數(shù)字收發(fā)系統(tǒng)的設(shè)計(jì)與實(shí)現(xiàn)
發(fā)布時(shí)間：2018-08-02 21:27
【摘要】：鄰近空間鏈路是深空通信行星網(wǎng)的重要組成部分,鄰近空間無(wú)線收發(fā)系統(tǒng)的研究與設(shè)計(jì)對(duì)于鄰近空間通信與深空通信網(wǎng)絡(luò)的發(fā)展,以及我國(guó)對(duì)深空收發(fā)機(jī)的研究具有重要意義。本文在研究一般數(shù)字收發(fā)系統(tǒng)架構(gòu)的基礎(chǔ)上,依據(jù)CCSDS制定的鄰近空間鏈路協(xié)議,結(jié)合鄰近空間通信環(huán)境的特點(diǎn),研究并設(shè)計(jì)實(shí)現(xiàn)了一套基于FPGA、DSP數(shù)字信號(hào)處理平臺(tái)的鄰近空間數(shù)字收發(fā)系統(tǒng)。研究與設(shè)計(jì)中,既包含了對(duì)經(jīng)典的數(shù)字通信理論的分析,又兼顧了鄰近空間通信鏈路協(xié)議的應(yīng)用以及工程實(shí)現(xiàn)的創(chuàng)新。首先,在結(jié)合鄰近空間通信系統(tǒng)要求的前提下,對(duì)整個(gè)系統(tǒng)方案與通信流程進(jìn)行合理化設(shè)計(jì),分別給出了發(fā)射機(jī)與接收機(jī)詳細(xì)的理論推導(dǎo)、參數(shù)分析與設(shè)計(jì)過(guò)程。其次,通過(guò)仿真對(duì)比,分析了傳統(tǒng)Costas環(huán)載波同步的原理,在分析相干解調(diào)原理引入相位模糊的基礎(chǔ)上,結(jié)合鄰近空間的通信流程和經(jīng)典的鑒相方法,提出了利用分階段鑒相實(shí)現(xiàn)無(wú)相位模糊的載波同步方法。通過(guò)仿真對(duì)比了查表映射法鑒相和CORDIC算法鑒相的性能優(yōu)劣,給出了高效的無(wú)相位模糊的載波同步設(shè)計(jì)方案與實(shí)現(xiàn)電路的仿真結(jié)果。然后,依據(jù)常規(guī)的早遲門(mén)符號(hào)同步理論,結(jié)合仿真結(jié)果,提出了避免不穩(wěn)定采樣點(diǎn)的創(chuàng)新型設(shè)計(jì)方法,給出了完整的實(shí)現(xiàn)過(guò)程。同時(shí)基于經(jīng)典的Gardner環(huán)定時(shí)同步理論,進(jìn)行了設(shè)計(jì)與實(shí)現(xiàn),結(jié)合實(shí)際的硬件系統(tǒng),對(duì)比了改進(jìn)型早遲門(mén)與Gardner環(huán)符號(hào)同步的性能。此外,利用巧妙的組合邏輯設(shè)計(jì),對(duì)幀同步與提取電路進(jìn)行了設(shè)計(jì)與實(shí)現(xiàn),給出了設(shè)計(jì)過(guò)程和仿真結(jié)果。最后,本文對(duì)整個(gè)鄰近空間數(shù)字收發(fā)系統(tǒng)進(jìn)行了聯(lián)合仿真,并結(jié)合硬件平臺(tái)設(shè)計(jì)了系統(tǒng)化的測(cè)試環(huán)境。分別對(duì)發(fā)射機(jī)的輸出信號(hào)以及數(shù)字接收中各個(gè)功能模塊中的關(guān)鍵信號(hào)進(jìn)行了觀測(cè),驗(yàn)證了本系統(tǒng)設(shè)計(jì)的正確性,滿(mǎn)足了鄰近空間通信協(xié)議的要求。
[Abstract]:The adjacent space link is an important part of the deep space communication planetary network. The research and design of the adjacent space wireless transceiver system is of great significance to the development of the adjacent space communication and deep space communication network, as well as the research on the deep space transceiver in our country. Based on the study of the architecture of the general digital transceiver system, this paper is based on the CCSDS system A set of adjacent space digital transceiver system based on FPGA and DSP digital signal processing platform is designed and designed, which includes the analysis of the classical digital communication theory and the application of the adjacent space communication link protocol. First, in the premise of combining the requirements of the adjacent space communication system, the whole system scheme and the communication process are rationalized, and the detailed theoretical derivation of the transmitter and receiver, the parameter analysis and the design process are given. Secondly, the principle of the traditional Costas ring carrier synchronization is analyzed by the imitation of the true contrast. On the basis of the analysis of coherent demodulation principle introducing phase ambiguity, combining the communication flow of adjacent space and the classical phase detection method, a phase ambiguity carrier synchronization method is proposed by phased phase discrimination. The performance of phase detection and CORDIC algorithm is compared by simulation, and an efficient non phase mode is given. The carrier synchronization design scheme and the simulation result of the realization circuit. Then, based on the conventional early sign synchronization theory and the simulation results, an innovative design method to avoid the unstable sampling points is proposed, and the complete implementation process is given. Based on the classic Gardner ring timing synchronization theory, the design and Implementation are carried out. With the actual hardware system, the performance of the symbol synchronization between the improved early late gate and the Gardner ring is compared. In addition, the design and implementation of the frame synchronization and extraction circuit are carried out with the ingenious combinatorial logic design. The design process and the simulation results are given. Finally, this paper makes a joint simulation of the whole adjacent space digital transceiver system and makes a joint simulation. A systematic test environment is designed with the hardware platform. The output signals of the transmitter and the key signals in each function module in the digital reception are observed respectively. The correctness of the design of the system is verified and the requirements of the adjacent space communication protocol are met.
【學(xué)位授予單位】：南京航空航天大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TN927
，
本文編號(hào)：2160788
[Abstract]:The adjacent space link is an important part of the deep space communication planetary network. The research and design of the adjacent space wireless transceiver system is of great significance to the development of the adjacent space communication and deep space communication network, as well as the research on the deep space transceiver in our country. Based on the study of the architecture of the general digital transceiver system, this paper is based on the CCSDS system A set of adjacent space digital transceiver system based on FPGA and DSP digital signal processing platform is designed and designed, which includes the analysis of the classical digital communication theory and the application of the adjacent space communication link protocol. First, in the premise of combining the requirements of the adjacent space communication system, the whole system scheme and the communication process are rationalized, and the detailed theoretical derivation of the transmitter and receiver, the parameter analysis and the design process are given. Secondly, the principle of the traditional Costas ring carrier synchronization is analyzed by the imitation of the true contrast. On the basis of the analysis of coherent demodulation principle introducing phase ambiguity, combining the communication flow of adjacent space and the classical phase detection method, a phase ambiguity carrier synchronization method is proposed by phased phase discrimination. The performance of phase detection and CORDIC algorithm is compared by simulation, and an efficient non phase mode is given. The carrier synchronization design scheme and the simulation result of the realization circuit. Then, based on the conventional early sign synchronization theory and the simulation results, an innovative design method to avoid the unstable sampling points is proposed, and the complete implementation process is given. Based on the classic Gardner ring timing synchronization theory, the design and Implementation are carried out. With the actual hardware system, the performance of the symbol synchronization between the improved early late gate and the Gardner ring is compared. In addition, the design and implementation of the frame synchronization and extraction circuit are carried out with the ingenious combinatorial logic design. The design process and the simulation results are given. Finally, this paper makes a joint simulation of the whole adjacent space digital transceiver system and makes a joint simulation. A systematic test environment is designed with the hardware platform. The output signals of the transmitter and the key signals in each function module in the digital reception are observed respectively. The correctness of the design of the system is verified and the requirements of the adjacent space communication protocol are met.
【學(xué)位授予單位】：南京航空航天大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TN927
，
本文編號(hào)：2160788
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