10Gbps Wi-Fi上行链路中频关键技术研究与实现

发布时间：2018-01-19 08:07

  本文关键词： Wi-Fi技术 数字中频 FPGA EVM　出处：《电子科技大学》2014年硕士论文　论文类型：学位论文

【摘要】：在“智慧城市”、“宽带中国”的战略下,Wi-Fi技术已渗透到人们生活的方方面面,各种移动终端设备使用量的剧增,使得原本就不宽松的2.4GHz频段显得更加拥挤。为提高Wi-Fi信号质量和用户体验效果,满足人们日益增长的无线需求,802.11ac协议规定Wi-Fi工作频段从干扰较大的2.4GHz转到5GHz,并支持80MHz和160MHz的可选频段,其最高理论数据速率达6.933Gbps,远远超出802.11n的600Mbps。5GHz频段频谱资源较干净,同频干扰小,充分利用5GHz的频谱资源以获得更高数据速率的传输成为下一代Wi-Fi的一个研究方向。10Gbps Wi-Fi的研究目的是验证新一代超宽带(645MHz包含400MHz有效频谱)、超高速(10Gbps以上)Wi-Fi实时处理系统的关键技术。论文则致力于10Gbps Wi-Fi上行发送链路的中频关键技术研究与实现,主要包括以下几点:(1)根据10Gbps Wi-Fi设计要求,结合当前数字中频技术包括变速率数字信号处理、高效滤波器、多相滤波以及高速数据采集技术,给出级联多相滤波结构以及带内平坦度矫正的方法,完成中频处理方案设计;(2)根据上行链路中频处理方案,结合下行链路中频处理部分,利用Matlab对上行链路的中频设计进行仿真;在仿真基础上,将链路转化为FPGA处理逻辑,再添加相应的处理模块,完成工程的实现;(3)BEE7硬件平台上完成10Gbps Wi-Fi上行链路中频方案的验证分析。经验证,DA采样率为1.92Gsps,输出信号中心频率1.44GHz,频谱带宽645MHz,SNR达54.47d B以上。经中频回环验证,8通道、64QAM调制下的EVM为0.49%,总数据速率10.53Gbps。论文设计实现了10Gbps Wi-Fi上行链路中频处理方案,通过功能与性能验证证明了方案的可行性,并结合下行链路中频设计部分,实现了中频回环64QAM调制条件下10.53Gbps的数据传输,且EVM为0.49%,为验证下一代Wi-Fi关键技术提供了依据。
[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.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN92
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本文编号：1443335