本文關(guān)鍵詞：射頻收發(fā)機(jī)實(shí)驗(yàn)平臺(tái)的設(shè)計(jì)實(shí)現(xiàn)　出處：《電子科技大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 收發(fā)機(jī) 無線通信測(cè)試 頻率綜合器 調(diào)制解調(diào)

【摘要】：隨著通信技術(shù)的飛速發(fā)展,對(duì)大學(xué)生的通信工程設(shè)計(jì)與硬件實(shí)現(xiàn)能力提出了更高的要求。由于目前適合學(xué)生實(shí)驗(yàn)用的實(shí)驗(yàn)平臺(tái)相對(duì)缺乏,國(guó)內(nèi)高校目前開設(shè)的相近類型實(shí)驗(yàn)一般都以比較簡(jiǎn)單的演示驗(yàn)證性實(shí)驗(yàn)居多,缺少系統(tǒng)性的設(shè)計(jì)實(shí)驗(yàn)。因此,構(gòu)建一個(gè)完整的無線通信實(shí)驗(yàn)平臺(tái),對(duì)培養(yǎng)學(xué)生的創(chuàng)新、設(shè)計(jì)能力和工程素養(yǎng),增強(qiáng)學(xué)生對(duì)無線通信領(lǐng)域知識(shí)的理解有重要的意義。本文完成了工作在2.4-2.48GHz頻段多信道通信的無線通信實(shí)驗(yàn)平臺(tái)的設(shè)計(jì)。該平臺(tái)涉及到頻率綜合器、收發(fā)機(jī)射頻前端、調(diào)制解調(diào)、數(shù)字處理以及控制電路等多個(gè)模塊的設(shè)計(jì),各模塊形成一個(gè)完整的無線通信系統(tǒng)。本實(shí)驗(yàn)平臺(tái)采用模塊化思想,因此,收發(fā)機(jī)射頻前端選擇使用集成度低的超外差式結(jié)構(gòu)且收發(fā)機(jī)射頻前端的每個(gè)功能電路都采用單獨(dú)的模塊進(jìn)行實(shí)現(xiàn),方便學(xué)生進(jìn)行設(shè)計(jì)性實(shí)驗(yàn)和自主設(shè)計(jì)。利用小數(shù)分頻的PLL技術(shù)實(shí)現(xiàn)的頻率綜合器為收發(fā)機(jī)提供本振信號(hào),既實(shí)現(xiàn)了步進(jìn)的精細(xì)調(diào)整,降低了小步進(jìn)頻率源的實(shí)現(xiàn)難度,又兼顧了低噪聲低雜散的性能指標(biāo),-95dBc/Hz@1KHz的低相位噪聲對(duì)收發(fā)機(jī)整體靈敏度的提升有很大的意義。收發(fā)機(jī)射頻前端使用上/下變頻的方式來實(shí)現(xiàn)載波頻率140MHz中頻與2.4-2.48GHz射頻的轉(zhuǎn)化,降低了射頻前端的實(shí)現(xiàn)難度。通過正交調(diào)制解調(diào)完成FPGA基帶信號(hào)與射頻前端中頻信號(hào)的轉(zhuǎn)化,可以很大程度上實(shí)現(xiàn)較高效率的信號(hào)傳輸,并且能夠兼容其他不同的傳輸方式。通過對(duì)該系統(tǒng)的硬件功能和通信性能進(jìn)行測(cè)試,并對(duì)測(cè)試結(jié)果進(jìn)行分析。頻率綜合器能夠?qū)崿F(xiàn)-95dBc/Hz@1KHz的低相位噪聲,接收機(jī)能夠?qū)崿F(xiàn)69dB的動(dòng)態(tài)范圍,接收機(jī)的靈敏度可以達(dá)到-105dBm�；鶐盘�(hào)為視頻信號(hào)的多信道通信時(shí)室內(nèi)通信距離可以超過22m,該實(shí)驗(yàn)平臺(tái)可以達(dá)到課題指標(biāo)的要求。
[Abstract]:With the rapid development of communication technology, the communication engineering design and hardware implementation ability of college students have been put forward higher requirements, because the experimental platform suitable for students' experiments is relatively lacking at present. At present, the similar types of experiments in domestic colleges and universities are generally more simple demonstration verification experiments, lack of systematic design experiments. Therefore, build a complete wireless communication experimental platform. To cultivate students' innovation, design ability and engineering literacy. It is very important to enhance students' understanding of wireless communication field. In this paper, the design of wireless communication experiment platform in 2.4-2.48GHz multi-channel communication is completed. The platform involves frequency. Synthesizer. Transceiver RF front-end, modulation and demodulation, digital processing and control circuit and other modules design, each module to form a complete wireless communication system. The RF front-end of transceiver adopts a low-integration superheterodyne structure and each functional circuit of RF front-end of transceiver is implemented by a separate module. It is convenient for students to carry out design experiment and independent design. The frequency synthesizer realized by PLL technology of fractional frequency division provides local oscillator signal for transceiver, which realizes the fine adjustment of step. It reduces the difficulty of realizing the small step frequency source and takes into account the performance index of low noise and low spurious. The low phase noise of -95dBc / Hz@ 1kHz has great significance to the overall sensitivity of transceiver. The RF front-end of transceiver uses upconversion / down-conversion to realize the carrier frequency 140MHz. Conversion of frequency to 2.4-2.48GHz RF. Through quadrature modulation and demodulation to complete the conversion of FPGA baseband signal and RF front-end intermediate frequency signal, the high efficiency signal transmission can be realized to a great extent. And it can be compatible with other transmission modes. By testing the hardware function and communication performance of the system. The frequency synthesizer can realize the low phase noise of -95dBc / Hz @ 1kHz and the receiver can realize the dynamic range of 69dB. The sensitivity of the receiver can reach -105dBm.The indoor communication distance can exceed 22m when the baseband signal is multi-channel communication signal.
【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】：2014
【分類號(hào)】：TN859

【參考文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前1條

1 邵東暉;寬帶信號(hào)數(shù)字接收機(jī)[D];西安電子科技大學(xué);2010年

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本文編號(hào)：1386980