【摘要】：隨著科技飛速發(fā)展,通信技術(shù)也在飛速發(fā)展。通信技術(shù)進(jìn)步最明顯的特征是通信傳輸速率的增長,用以衡量通信傳輸速率的單位由Kbps上升為Mbps、Gbps乃至Tbps。通信技術(shù)的進(jìn)步還體現(xiàn)在傳輸方式的變革,從電纜傳輸?shù)焦饫w傳輸,從有線通信到無線通信,每一次傳輸方式的變革都會給人們帶來新的通信體驗。此外,通信傳輸?shù)臉I(yè)務(wù)類型也在不斷增加,如前期只有適用于語音通信的E1業(yè)務(wù)和STM-1業(yè)務(wù),到后期出現(xiàn)了以太網(wǎng)分組業(yè)務(wù)。微波傳輸系統(tǒng)是通信技術(shù)進(jìn)步的產(chǎn)物,該系統(tǒng)可以把只能通過有線傳輸?shù)腅1、STM-1和分組業(yè)務(wù)等多種業(yè)務(wù)數(shù)據(jù)組幀復(fù)用后調(diào)制到微波鏈路中進(jìn)行無線傳輸。微波傳輸系統(tǒng)架設(shè)快捷,開通方便。微波特性與可見光類似,可無視地形復(fù)雜度而進(jìn)行視距通信,傳輸距離可達(dá)數(shù)十千米。此類設(shè)備多用于自然災(zāi)害通信網(wǎng)絡(luò)快速重建、海峽、懸崖間通信和人口分布密度小的地區(qū)通信。微波通信的缺點是頻譜利用率低,導(dǎo)致信息傳輸速率也較低。為了提高信息傳輸速率,微波通信使用了正交幅度調(diào)制、同波道交叉極化傳輸?shù)燃夹g(shù)。本文以支持xPIC(交叉極化干擾抵消)功能的微波傳輸系統(tǒng)IDU設(shè)計為主題展開介紹。文章內(nèi)容主要包括了4個部分：1.相關(guān)理論研究與仿真驗證。介紹了XPIC(交叉極化干擾抵消)實現(xiàn)原理并對該算法用MATLAB進(jìn)行仿真；介紹了本文涉及到的調(diào)制解調(diào)方式的實現(xiàn)方式與性能分析。2.硬件設(shè)計。設(shè)計了電源拓?fù)湟约爸骺乇P、業(yè)務(wù)盤、調(diào)制解調(diào)盤等單盤。該設(shè)計的創(chuàng)新點為,IDU采用多時鐘源設(shè)計,把業(yè)務(wù)恢復(fù)時鐘、本地時鐘和數(shù)字同步網(wǎng)的時鐘都送入主控盤,主控盤按優(yōu)先級選擇其中一路時鐘作為工作主時鐘,并通過時鐘分發(fā)器發(fā)送到各單盤上,即實現(xiàn)了微波通信系統(tǒng)時鐘同步。本部分還介紹了EMC在IDU的實際應(yīng)用。3.軟件設(shè)計。用“自頂向下”的方法對IDU的監(jiān)控軟件進(jìn)行分層設(shè)計。4.調(diào)測結(jié)果。對IDU進(jìn)行硬、軟件和系統(tǒng)層的測試,測試結(jié)果表明本次設(shè)計的IDU較完美地達(dá)到預(yù)期指標(biāo)。
[Abstract]:With the rapid development of science and technology, communication technology is also developing rapidly. The most obvious feature of the advances in communication technology is the increase in the rate of communication transmission, which is measured by the rise from Kbps to Mbps,Gbps and even Tbps.. The progress of communication technology is also reflected in the transformation of transmission mode, from cable transmission to optical fiber transmission, from wired communication to wireless communication, each time the transformation of transmission mode will bring people a new communication experience. In addition, the types of communication transmission are also increasing, such as E1 service and STM-1 service, which are only suitable for voice communication, and ethernet packet service appears in the later period. Microwave transmission system is the result of the development of communication technology. This system can modulate the multi-service data group frame multiplexing only through wired transmission such as E1STM-1 and packet service into the microwave link for wireless transmission. Microwave transmission system is set up fast and convenient to open. Microwave, similar to visible light, can communicate with visual range regardless of terrain complexity, and the transmission distance can reach tens of kilometers. Such devices are used for rapid reconstruction of natural disaster communication networks, communication between straits, cliffs, and communications in areas with low population density. The disadvantage of microwave communication is that the spectrum efficiency is low, and the rate of information transmission is also low. In order to improve the rate of information transmission, the orthogonal amplitude modulation (OAM) and cross-polarization transmission of the same channel are used in microwave communication. In this paper, the IDU design of microwave transmission system supporting xPIC (cross polarization interference cancellation) is introduced. The article mainly includes four parts: 1. Related theoretical research and simulation verification. This paper introduces the realization principle of XPIC (Cross polarization interference cancellation) and simulates the algorithm with MATLAB, and introduces the realization and performance analysis of the modulation and demodulation method involved in this paper. Hardware design. The power topology and single disk, such as main control disk, service disk, modulation and demodulation disk, are designed. The innovation of this design is that the IDU adopts multi-clock source design, which sends the service recovery clock, the local clock and the digital synchronous network clock to the main control disk, and the main control disk selects one of them as the working master clock according to the priority. The clock synchronization of microwave communication system is realized by sending the clock to each single disk. This section also introduces the practical application of EMC in IDU. Software design. Using the "top-down" method to the IDU monitoring software layer design. 4. Test results. The hardware, software and system level of IDU are tested. The test results show that the designed IDU achieves the expected target perfectly.
【學(xué)位授予單位】：武漢郵電科學(xué)研究院
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN925

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