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  本文關鍵詞： Wi-Fi技術 數(shù)字中頻 FPGA EVM　出處：《電子科技大學》2014年碩士論文　論文類型：學位論文

【摘要】：在“智慧城市”、“寬帶中國”的戰(zhàn)略下,Wi-Fi技術已滲透到人們生活的方方面面,各種移動終端設備使用量的劇增,使得原本就不寬松的2.4GHz頻段顯得更加擁擠。為提高Wi-Fi信號質量和用戶體驗效果,滿足人們日益增長的無線需求,802.11ac協(xié)議規(guī)定Wi-Fi工作頻段從干擾較大的2.4GHz轉到5GHz,并支持80MHz和160MHz的可選頻段,其最高理論數(shù)據(jù)速率達6.933Gbps,遠遠超出802.11n的600Mbps。5GHz頻段頻譜資源較干凈,同頻干擾小,充分利用5GHz的頻譜資源以獲得更高數(shù)據(jù)速率的傳輸成為下一代Wi-Fi的一個研究方向。10Gbps Wi-Fi的研究目的是驗證新一代超寬帶(645MHz包含400MHz有效頻譜)、超高速(10Gbps以上)Wi-Fi實時處理系統(tǒng)的關鍵技術。論文則致力于10Gbps Wi-Fi上行發(fā)送鏈路的中頻關鍵技術研究與實現(xiàn),主要包括以下幾點:(1)根據(jù)10Gbps Wi-Fi設計要求,結合當前數(shù)字中頻技術包括變速率數(shù)字信號處理、高效濾波器、多相濾波以及高速數(shù)據(jù)采集技術,給出級聯(lián)多相濾波結構以及帶內平坦度矯正的方法,完成中頻處理方案設計;(2)根據(jù)上行鏈路中頻處理方案,結合下行鏈路中頻處理部分,利用Matlab對上行鏈路的中頻設計進行仿真;在仿真基礎上,將鏈路轉化為FPGA處理邏輯,再添加相應的處理模塊,完成工程的實現(xiàn);(3)BEE7硬件平臺上完成10Gbps Wi-Fi上行鏈路中頻方案的驗證分析。經(jīng)驗證,DA采樣率為1.92Gsps,輸出信號中心頻率1.44GHz,頻譜帶寬645MHz,SNR達54.47d B以上。經(jīng)中頻回環(huán)驗證,8通道、64QAM調制下的EVM為0.49%,總數(shù)據(jù)速率10.53Gbps。論文設計實現(xiàn)了10Gbps Wi-Fi上行鏈路中頻處理方案,通過功能與性能驗證證明了方案的可行性,并結合下行鏈路中頻設計部分,實現(xiàn)了中頻回環(huán)64QAM調制條件下10.53Gbps的數(shù)據(jù)傳輸,且EVM為0.49%,為驗證下一代Wi-Fi關鍵技術提供了依據(jù)。
[Abstract]:In the "smart city", "broadband China" strategy, Wi-Fi technology has penetrated into all aspects of people's lives, the use of various mobile devices has increased dramatically. In order to improve the quality of Wi-Fi signal and the effect of user experience, it can meet the increasing wireless demand. The 802.11ac protocol provides that the operating frequency band of Wi-Fi is changed from 2.4GHz to 5GHz, and supports the optional bands of 80MHz and 160MHz. The maximum theoretical data rate is 6.933Gbps. which far exceeds the 600Mbps.5GHz frequency band of 802.11n, and the spectrum resource is relatively clean, and the interference of the same frequency is small. Making full use of 5GHz spectrum resources to achieve higher data rate transmission becomes a research direction of next generation Wi-Fi. 10Gbps Wi-Fi is designed to verify the new generation of UWB (. 645MHz includes 400MHz effective spectrum. This paper is devoted to the research and implementation of the if key technology of 10Gbps Wi-Fi uplink transmission link. It mainly includes the following points: 1) according to the design requirements of 10Gbps Wi-Fi, combined with the current digital if technology, including variable rate digital signal processing, high efficiency filter. The multi-phase filtering and high-speed data acquisition technology, the concatenated polyphase filter structure and the method of in-band flatness correction are given, and the intermediate frequency processing scheme is designed. (2) according to the uplink if processing scheme and the downlink if processing part, the if design of uplink is simulated by Matlab. On the basis of simulation, the link is transformed into FPGA processing logic, and the corresponding processing module is added to realize the project. The if scheme of 10Gbps Wi-Fi uplink is verified and analyzed on the hardware platform of BEE7, and the sampling rate of DA is 1.92 GSPs. The central frequency of the output signal is 1.44 GHz, and the bandwidth of the output signal is 645 MHz / Hz. The SNR is above 54.47 dB. The intermediate frequency return loop verifies the 8 channels. The EVM of 64QAM modulation is 0.49 and the total data rate is 10.53Gbps.The if processing scheme of 10Gbps Wi-Fi uplink is designed and implemented in this paper. The feasibility of the scheme is proved by function and performance verification, and the data transmission at 10.53Gbps under if 64QAM modulation is realized by combining downlink intermediate frequency design. The EVM is 0.49, which provides the basis for verifying the key technologies of the next generation Wi-Fi.
【學位授予單位】：電子科技大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN92
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本文編號：1443335