本文關(guān)鍵詞：LTE上行鏈路波形設(shè)汁與軟件無(wú)線電實(shí)現(xiàn)　出處：《電子科技大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 信道編碼 單載波頻分多址 軟件無(wú)線電 圖形化開(kāi)發(fā)

【摘要】：隨著LTE多頻多模智能手機(jī)時(shí)代的來(lái)臨,要求在2G、3G模式基礎(chǔ)上支持LTE模式,并實(shí)現(xiàn)國(guó)際漫游的工作頻段,因此頻段總量接近40個(gè)。對(duì)于設(shè)備制造商來(lái)說(shuō),支持如此多的標(biāo)準(zhǔn)和頻段所面臨的挑戰(zhàn)非常大,需要設(shè)計(jì)不同的硬件平臺(tái)來(lái)支持不同標(biāo)準(zhǔn)及頻段,所以產(chǎn)品的開(kāi)發(fā)周期長(zhǎng)、設(shè)計(jì)成本及維護(hù)成本非常高。因此許多設(shè)備制造商,開(kāi)始采用日益成熟的軟件無(wú)線電技術(shù),希望利用軟件無(wú)線電的可編程、可重構(gòu)等優(yōu)點(diǎn),實(shí)現(xiàn)快速開(kāi)發(fā)驗(yàn)證以減少成本。為此,論文基于團(tuán)隊(duì)自主研發(fā)的uSDR軟件無(wú)線平臺(tái)上,研究了LTE上行鏈路關(guān)鍵技術(shù),根據(jù)需求完成了LTE上行鏈路波形的設(shè)計(jì)與圖形化開(kāi)發(fā)了LTE上行鏈路波形,并在軟件無(wú)線電平臺(tái)上對(duì)鏈路的性能進(jìn)行了測(cè)試分析。本文主要工作如下:第一,研究了LTE的幀結(jié)構(gòu)、導(dǎo)頻信號(hào)設(shè)計(jì)、信道估計(jì)與均衡等關(guān)鍵技術(shù)。根據(jù)項(xiàng)目對(duì)鏈路的功能需求和性能需求,給出了LTE上行鏈路波形設(shè)計(jì)方案:發(fā)射端主要采用了CRC編碼、Turbo編碼、加擾、16QAM調(diào)制、SC-FDMA調(diào)制、加循環(huán)前綴及上變頻等設(shè)計(jì)方案。為了便于設(shè)計(jì)與實(shí)現(xiàn),將LTE上行鏈路波形處理流程劃分為發(fā)射單元、接收單元、中射頻處理單元、同步單元四個(gè)部分,對(duì)每部分的實(shí)現(xiàn)算法做了詳細(xì)的說(shuō)明。本文給出了LTE上行鏈路仿真結(jié)果,結(jié)果表明:在EPA信道下,鏈路能夠抵抗100Hz左右的頻偏,在026bE N?dB時(shí),誤碼率能夠達(dá)到34.59 10??;第二,LTE上行鏈路波形圖形化開(kāi)發(fā)。論文運(yùn)用圖形化開(kāi)發(fā)工具System Generator完成了LTE上行鏈路波形圖形化開(kāi)發(fā)。給出LTE上行鏈路波形圖形化實(shí)現(xiàn)的詳細(xì)實(shí)現(xiàn)過(guò)程,對(duì)上行鏈路按照功能進(jìn)行劃分,劃分為多個(gè)功能模塊,然后對(duì)各功能模塊的輸入輸出接口及內(nèi)部處理流程進(jìn)行了詳細(xì)的設(shè)計(jì),給出了各功能模塊在System Generator上的具體實(shí)現(xiàn)方法;第三,在軟件無(wú)線電上測(cè)試了LTE上行鏈路波形的功能及性能。利用自主研發(fā)的軟件無(wú)線電平臺(tái),完成了LTE上行鏈路波形的功能及通信性能測(cè)試。測(cè)試結(jié)果表明,在人員干擾、機(jī)器干擾(電腦、頻譜儀等設(shè)備)、墻體干擾的室內(nèi)環(huán)境下,LTE上行鏈路波形能夠正確傳輸文件、視頻語(yǔ)音等功能。誤碼率實(shí)際測(cè)試性能比仿真結(jié)果差1.6dB。本文在uSDR平臺(tái)上設(shè)計(jì)并實(shí)現(xiàn)了LTE上行鏈路波形,并通過(guò)了軟件無(wú)線電平臺(tái)驗(yàn)證,可用于高等院校、科研機(jī)構(gòu)教學(xué)實(shí)驗(yàn)。同時(shí)豐富了軟件無(wú)線電平臺(tái)的波形功能,也為將來(lái)更加復(fù)雜波形的開(kāi)發(fā)及通信系統(tǒng)的可視化、圖形化開(kāi)發(fā)提供了參考。在LTE上行鏈路波形的圖形化開(kāi)發(fā)中,許多的功能模塊的實(shí)現(xiàn)都可以被復(fù)用,能夠用于快速開(kāi)發(fā)驗(yàn)證其它模式下的波形。
[Abstract]:With the advent of LTE multi-frequency and multi-mode smart phone era, it is required to support the LTE mode on the basis of 2GN 3G mode and to realize the working frequency band of international roaming. Therefore, the total frequency band is close to 40. For equipment manufacturers, the challenge of supporting so many standards and frequency bands is very great, and different hardware platforms need to be designed to support different standards and frequency bands. Therefore, the product development cycle is long, the design cost and the maintenance cost is very high. Therefore, many equipment manufacturers begin to adopt the increasingly mature software radio technology, hoping to use the software radio programmable. Reconfigurable and other advantages to achieve rapid development validation to reduce costs. Therefore, based on the uSDR software wireless platform developed by the team, the key technologies of LTE uplink are studied in this paper. The uplink waveform of LTE is designed and graphically developed according to the demand. The uplink waveform of LTE is developed. The main work of this paper is as follows: firstly, the frame structure and pilot signal design of LTE are studied. According to the requirement of function and performance of the link, the design scheme of LTE uplink waveform is given. The transmitter mainly adopts CRC coding and turbo coding. Scrambling 16QAM modulation SC-FDMA modulation, cyclic prefix and up-conversion are designed. In order to design and implement, the LTE uplink waveform processing flow is divided into transmitting units. The four parts of receiving unit, middle radio frequency processing unit and synchronization unit are described in detail. The simulation results of LTE uplink are given in this paper, and the results show that: in EPA channel. The link can resist about 100 Hz frequency offset at 026bE N? The error rate can reach 34.59 10? ? ; Number two. LTE uplink waveform graphical development. This paper uses the graphical development tool System. Generator completed the LTE uplink waveform graphical development, and gave a detailed implementation process of LTE uplink waveform graphical realization. The uplink is divided into several functional modules according to the function, and then the input and output interface of each functional module and the internal processing flow are designed in detail. The realization method of each function module on System Generator is given. Thirdly, the function and performance of LTE uplink waveform are tested on software radio. The function and communication performance of LTE uplink waveform are tested. The test results show that in the indoor environment of human interference, machine interference (computer, spectrometer and other equipment, wall interference). LTE uplink waveforms can transfer files correctly. The performance of BER testing is 1.6 dB worse than that of simulation results. The uplink waveform of LTE is designed and implemented on uSDR platform and verified by software radio platform. It can be used in teaching experiments in colleges and research institutions. It also enriches the waveform function of software radio platform, and also provides more complex waveform development and visualization of communication system in the future. In the graphical development of LTE uplink waveforms, many functional modules can be reused, which can be used to quickly develop and verify the waveforms in other modes.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TN929.5
，

本文編號(hào)：1356778