本文選題：寬帶WLAN + 射頻前端�。� 參考：《電子科技大學(xué)》2015年碩士論文

【摘要】：無線局域網(wǎng)(WLAN)是解決無線設(shè)備和互聯(lián)網(wǎng)在短距離連接完成業(yè)務(wù)數(shù)據(jù)傳輸?shù)淖钣行Х椒ㄖ?隨著無線互聯(lián)網(wǎng)業(yè)務(wù)擴(kuò)展和無線終端設(shè)備的快速普及,在面對(duì)高密集度接入和高并行的情況下,IEEE 802.11ac作為下一代WLAN標(biāo)準(zhǔn)之一,能夠滿足多用戶對(duì)高速率、高吞吐量的需求。802.11ac標(biāo)準(zhǔn)主要特征包括:工作在5G頻段、信道帶寬最高支持160MHz、最多支持8空間流、理論最高傳輸速率達(dá)到6.93Gbps等。本文依據(jù)802.11ac標(biāo)準(zhǔn)物理層要求,主要研究寬帶WLAN系統(tǒng)的射頻前端部分,提出工作帶寬665MHz和8發(fā)8收MIMO結(jié)構(gòu)的寬帶多天線射頻前端具體設(shè)計(jì)與實(shí)現(xiàn)方案。主要工作內(nèi)容包括:首先,總結(jié)了無線收發(fā)機(jī)常用結(jié)構(gòu)優(yōu)缺點(diǎn)和MIMO技術(shù)特點(diǎn),根據(jù)802.11ac標(biāo)準(zhǔn)物理層要求對(duì)射頻前端工作帶寬、前端架構(gòu)、噪聲系數(shù)等主要技術(shù)參數(shù)進(jìn)行分析,提出收發(fā)通道工程技術(shù)指標(biāo)。其次,根據(jù)射頻前端的功能需求劃分子功能模塊,采用八路相同的收發(fā)通道,討論收發(fā)、本振模塊鏈路結(jié)構(gòu)設(shè)計(jì)方案和主要指標(biāo)的具體實(shí)現(xiàn)方式,根據(jù)鏈路雜散要求提出定制介質(zhì)濾波器的技術(shù)指標(biāo)。再次,在總體設(shè)計(jì)要求下對(duì)射頻前端進(jìn)行詳細(xì)設(shè)計(jì)。按照性能需求選擇合適器件,對(duì)收發(fā)鏈路增益、線性度和雜散抑制等指標(biāo)進(jìn)行預(yù)算分析。完成校正鏈路收發(fā)切換、本振和增益控制等主要功能設(shè)計(jì),同時(shí)對(duì)混頻器、LNA和末級(jí)功放等關(guān)鍵器件進(jìn)行優(yōu)化。最后,完成射頻前端的組裝和調(diào)試,對(duì)主要功能和性能進(jìn)行測(cè)試。通過測(cè)試驗(yàn)證,射頻前端具備665MHz寬帶信號(hào)收發(fā)、通道選擇和通道校正功能,接收噪聲系數(shù)為4.1dB,發(fā)射飽和功率29dBm,鏡像抑制達(dá)到70dBc。本射頻前端平臺(tái)覆蓋802.11ac全頻段、采用8×8的MIMO架構(gòu),支持靈活的信道配置和空間流配置,為驗(yàn)證下一代WLAN技術(shù)提供了射頻前端硬件支持,對(duì)WLAN技術(shù)的發(fā)展起到一定的推動(dòng)作用。
[Abstract]:WLAN (WLAN) is one of the most effective methods to realize data transmission between wireless devices and Internet in short distance connection. With the expansion of wireless Internet services and the rapid popularization of wireless terminal devices, WLAN is one of the most effective methods to solve the problem. In the face of high density access and high parallelism, IEEE 802.11ac, as one of the next generation WLANs, can meet the demand of multi-user for high speed and high throughput. The main features of 802.11ac standard include: working in 5G band. The channel bandwidth can support up to 160 MHz and up to 8 spatial streams, and the theoretical maximum transmission rate is 6.93 Gbps. According to the requirements of 802.11ac standard physical layer, this paper mainly studies the RF front-end part of broadband WLAN system, and proposes a design and implementation scheme of broadband multi-antenna RF front-end with a bandwidth of 665MHz and 8 transmit / receive MIMO architecture. The main work includes: firstly, the advantages and disadvantages of wireless transceiver structure and the characteristics of MIMO technology are summarized. According to the requirements of 802.11ac standard physical layer, the main technical parameters such as RF front-end bandwidth, front-end architecture, noise coefficient and so on are analyzed. The technical specifications of the transceiver channel are put forward. Secondly, according to the functional requirements of the RF front-end, the sub-functional modules are divided, and eight channels of the same transceiver are used to discuss the design scheme of the link structure of the transceiver, the local oscillator module and the specific implementation mode of the main indexes. According to the requirements of link spurious, the technical specifications of customized dielectric filter are presented. Thirdly, the RF front end is designed in detail under the overall design requirements. According to the requirements of performance, the appropriate devices are selected, and the parameters such as gain, linearity and spurious suppression of the transceiver link are analyzed. The main functions of correction link transceiver switching, local oscillator and gain control are designed, and the key devices such as LNA and final stage power amplifier are optimized. Finally, the assembly and debugging of RF front-end are completed, and the main functions and performance are tested. The test results show that the RF front-end has the functions of 665 MHz broadband signal transceiver, channel selection and channel correction. The received noise coefficient is 4.1 dB, the transmission saturation power is 29 dBm, and the mirror image suppression is 70 dBc. The RF front-end platform covers the full frequency band of 802.11ac and adopts 8 脳 8 MIMO architecture to support flexible channel configuration and spatial stream configuration. It provides RF front-end hardware support for the verification of the next generation WLAN technology, and plays a certain role in promoting the development of 802.11ac technology.
【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)】：TN925.93
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本文編號(hào)：2014355