【摘要】：隨著社會經(jīng)濟和科技的快速發(fā)展,寬帶無線電通信技術(shù)(WIFI、WiMAX、CDMA、LTE等)和移動互聯(lián)網(wǎng)融入日常生活當(dāng)中,與此同時,卻帶來了人為干擾嚴(yán)重和電磁環(huán)境復(fù)雜化的問題。為了解除這種矛盾,需要進行無線電管理。LTE (Long Term Evolution,長期演進)作為現(xiàn)代社會移動通信的標(biāo)準(zhǔn),具有高峰值速率、高頻譜效率、網(wǎng)絡(luò)架構(gòu)扁平化、高移動性和低時延等多種優(yōu)勢,能夠符合現(xiàn)在電信技術(shù)業(yè)務(wù)移動化、IP化和寬帶化的需求,得到了廣泛的應(yīng)用。本論文從實際應(yīng)用背景出發(fā),對LTE下行信號進行監(jiān)測。論文依據(jù)LTE物理層協(xié)議(3GPPTS36.201-214),在接收端完成同步的前提下,針對FFT、信道估計、解預(yù)編碼、解層映射、解調(diào)、解擾、解速率匹配、信道譯碼和CRC校驗等信號處理環(huán)節(jié)設(shè)計了LTE下行信號的接收處理方案。基于多核片上系統(tǒng)架構(gòu)DSP芯片TMS320C6670,設(shè)計了使用VCP2和TCP3d協(xié)加速器完成咬尾卷積碼譯碼和turbo碼譯碼的技術(shù)方案,降低了對DSP的CPU核心的處理負(fù)荷,并提升了實時性,降低了功耗。論文在TMS320C6670評估板上以及CCS軟件開發(fā)環(huán)境下,針對以上設(shè)計進行了代碼實現(xiàn)和驗證,對LTE下行信號接收處理的性能和開銷進行了評估,評估結(jié)果表明系統(tǒng)的設(shè)計和實現(xiàn)可滿足應(yīng)用需求。本論文基于DSP對LTE的物理層信號進行接收處理,為后續(xù)開發(fā)和應(yīng)用奠定了基礎(chǔ)。
[Abstract]:With the rapid development of social economy and science and technology, broadband radio communication (WIFI,WiMAX,CDMA,LTE) and mobile Internet are integrated into the daily life, but at the same time, it brings serious man-made interference and complex electromagnetic environment. In order to solve this contradiction, radio management. LTE (Long Term Evolution, should be developed for a long time. As the standard of modern mobile communication, it has high peak rate, high spectral efficiency and flat network architecture. Because of its advantages of high mobility and low delay, it can meet the needs of mobile, IP and broadband telecommunication technology, and has been widely used. Based on the practical application background, this paper monitors the downlink signal of LTE. According to LTE physical layer Protocol (3GPPTS36.201-214), this paper aims at FFT, channel estimation, de-coding, de-layer mapping, demodulation, descrambling and descrambling rate matching under the premise of synchronization at the receiving end. Signal processing such as channel decoding and CRC check are designed to receive and process LTE downlink signals. Based on the multi-core system architecture DSP chip TMS320C6670, this paper designs a technical scheme of VCP2 and TCP3d coaccelerator to decode the bitting convolutional code and turbo code, which reduces the processing load of the CPU core of DSP, improves the real-time performance and reduces the power consumption. Based on the TMS320C6670 evaluation board and the CCS software development environment, this paper implements and verifies the above design, and evaluates the performance and overhead of the LTE downlink signal receiving and processing. The evaluation results show that the design and implementation of the system can meet the application requirements. In this paper, the physical layer signal of LTE is received and processed based on DSP, which lays a foundation for further development and application.
【學(xué)位授予單位】：東南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TN929.5

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