本文選題：TD-LTE　切入點(diǎn)：射頻拉遠(yuǎn)單元　出處：《電子科技大學(xué)》2012年碩士論文　論文類型：學(xué)位論文

【摘要】：從原始社會(huì)到今天，人類的通信方式發(fā)生了巨大的變化，隨著移動(dòng)通信技術(shù)的出現(xiàn)，人類通信逐漸擺脫了地域限制實(shí)現(xiàn)了移動(dòng)化。移動(dòng)通信技術(shù)從出現(xiàn)到現(xiàn)在也隨時(shí)間不斷的發(fā)生變化，從最初模擬蜂窩移動(dòng)通信實(shí)驗(yàn)系統(tǒng)發(fā)展到第二代窄帶數(shù)字移動(dòng)通信系統(tǒng)和采用時(shí)分或頻分雙工技術(shù)的第三代寬帶數(shù)字移動(dòng)通信系統(tǒng)。雖然每一代移動(dòng)通信系統(tǒng)都在頻率利用、網(wǎng)絡(luò)結(jié)構(gòu)、數(shù)據(jù)傳輸率等方面都比前一代系統(tǒng)有了較大的改進(jìn)，但在面對日益增多的移動(dòng)通信用戶和隨之而來的更高的業(yè)務(wù)帶寬需求時(shí)，前幾代系統(tǒng)因?yàn)橄到y(tǒng)固有的缺陷而顯得力不從心。為了能夠提供更高的傳輸帶寬實(shí)現(xiàn)移動(dòng)傳輸寬帶化和接入寬帶移動(dòng)化，采用正交頻分復(fù)用和多輸入多輸出技術(shù)的TD-LTE系統(tǒng)問世，TD-LTE是由中國主導(dǎo)的TDD版本的LTE(Long Term Evolution)國際標(biāo)準(zhǔn)。 射頻拉遠(yuǎn)單元是TD-LTE接入網(wǎng)的兩個(gè)重要組成設(shè)備之一，其主要作用是將基帶信號(hào)轉(zhuǎn)換成射頻信號(hào)并通過天線發(fā)出去，將接受到射的頻信號(hào)轉(zhuǎn)換成基帶信號(hào)并傳輸給基帶處理單元。TD-LTE射頻拉遠(yuǎn)單元軟件主要功能是完成對射頻拉遠(yuǎn)單元三大物理模塊器件的初始化和控制，對需要增益補(bǔ)償?shù)钠骷M(jìn)行補(bǔ)償值計(jì)算和相應(yīng)器件參數(shù)調(diào)整，對在運(yùn)行中可能出現(xiàn)錯(cuò)誤的器件進(jìn)行監(jiān)控，對出現(xiàn)的錯(cuò)誤進(jìn)行管理以保證設(shè)備一直能夠正常工作。此外軟件還需要維護(hù)射頻拉遠(yuǎn)單元運(yùn)行狀態(tài)并對外發(fā)布設(shè)備通信接口，接收和響應(yīng)基帶處理單元發(fā)出的控制消息。 本論文使用面向?qū)ο蟮姆椒ㄔO(shè)計(jì)了TD-LTE射頻拉遠(yuǎn)單元軟件，實(shí)現(xiàn)了對射頻拉遠(yuǎn)單元硬件的初始化、配置、測量和對系統(tǒng)的監(jiān)控、錯(cuò)誤管理等功能。通過采用易擴(kuò)展嵌入式系統(tǒng)結(jié)構(gòu)和面向?qū)ο蟪绦蛟O(shè)計(jì)技術(shù)，解決了嵌入式系統(tǒng)不便于擴(kuò)展的問題，提高了嵌入式軟件的可擴(kuò)展和易擴(kuò)展性，使嵌入式系統(tǒng)開發(fā)周期不斷縮短，系統(tǒng)穩(wěn)定性逐步提升。本文以TD-LTE射頻拉遠(yuǎn)單元為實(shí)例，探索了使用面向?qū)ο蠹夹g(shù)開發(fā)嵌入式軟件的問題，，為以后嵌入式系統(tǒng)快速開發(fā)、提高軟件擴(kuò)展性和維護(hù)性提供了借鑒意義。
[Abstract]:From primitive society to today, great changes have taken place in human communication mode. With the emergence of mobile communication technology, Human communication has gradually moved away from geographical restrictions. Mobile communication technology has changed over time from its emergence to the present. From the first analog cellular mobile communication experimental system to the second generation narrowband digital mobile communication system and the third generation wideband digital mobile communication system using time division or frequency division duplex technology, although each generation of mobile communication system is used at frequency, The network structure, data transmission rate and other aspects have been greatly improved compared with the previous generation system, but in the face of the increasing number of mobile communication users and the accompanying higher service bandwidth requirements, Previous generations of systems have been unable to cope with the inherent defects of the system. In order to provide a higher transmission bandwidth for mobile transmission broadband and access broadband mobility, TD-LTE system based on orthogonal Frequency Division Multiplexing (OFDM) and Multi-Input Multiple-Output (MIMO) is an international standard of LTE(Long Term Evolution (LTE(Long Term), which is dominated by China. RF remote unit is one of the two important equipments in TD-LTE access network. Its main function is to convert baseband signal into RF signal and send it out through antenna. The main function of converting the received radio frequency signal to the baseband signal and transmitting it to the baseband processing unit .TD-LTE radio-frequency drawing unit software is to complete the initialization and control of the three physical modules of the radio-frequency remote cell. Calculation of compensation value and adjustment of corresponding device parameters for devices requiring gain compensation, monitoring and control of devices that may have errors in operation, In addition, the software also needs to maintain the running state of the RF remote unit and release the device communication interface to receive and respond to the control message sent by the baseband processing unit. In this paper, the software of TD-LTE remote unit is designed by using object oriented method. The hardware of the unit is initialized, configured, measured and monitored. Error management and other functions. Through the use of extensible embedded system structure and object-oriented programming technology, the problem that embedded system is not easy to be extended is solved, and the extensibility and extensibility of embedded software are improved. The development cycle of embedded system is shortened and the stability of embedded system is improved gradually. This paper takes TD-LTE RF remote unit as an example to explore the problem of developing embedded software with object oriented technology, so as to develop embedded system quickly in the future. Improving software extensibility and maintainability provides reference significance.
【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】：2012
【分類號(hào)】：TP368.1;TN929.5

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相關(guān)期刊論文 前3條

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本文編號(hào)：1556395