【摘要】：軟件無線電是無線通信系統(tǒng)的重要發(fā)展趨勢之一,核心思想是采用一個通用的、標(biāo)準(zhǔn)的、模塊化的硬件系統(tǒng),通過加載不同的軟件來實(shí)現(xiàn)無線通信系統(tǒng)的各種功能。軟件無線電增強(qiáng)了無線通信系統(tǒng)的靈活性和通用性,系統(tǒng)升級和系統(tǒng)之間互聯(lián)將非常便利。軟件無線電系統(tǒng)主要由射頻處理部分(含天線)、中頻處理部分和控制軟件組成。目前,中頻處理部分仍是軟件無線電研究的重點(diǎn)。中頻處理部分通常只有幾個通道,面對信息量的加大以及信號處理速度的需求,本文主要基于軟件無線電理論,結(jié)合目前的硬件工藝水平和數(shù)字信號處理理論,以實(shí)用、可實(shí)現(xiàn)為出發(fā)點(diǎn),設(shè)計(jì)了一種多通道寬帶數(shù)字信號處理系統(tǒng),采用CPCI總線構(gòu)架,板載3張中頻四通道寬帶數(shù)字信號處理平臺,最大可同時處理12個通道的信號,每個通道帶寬20MHz,最大可覆蓋240MHz。每張中頻四通道寬帶數(shù)字信號處理平臺主由AD、FPGA、DSP和CPCI總線等構(gòu)成。CPCI總線通信速度大于33Mbyte/s;采用高速DSP和FPGA完成數(shù)字信號處理,提升平臺的可編程性;A/D器件的處理速度為90MHz。本系統(tǒng)可完成基于中頻70MHz,帶寬20MHz的信號處理及基帶分析、解調(diào)。本文的主要工作:1、查閱并分析了軟件無線電理論及目前可實(shí)現(xiàn)的軟件無線電系統(tǒng);2、學(xué)習(xí)并掌握了通用中頻寬帶數(shù)字信號處理平臺的原理:信號采樣理論、多速率信號處理、數(shù)字上下變頻、軟件無線電平臺硬件結(jié)構(gòu)、可編程邏輯器件、模數(shù)/數(shù)模轉(zhuǎn)換以及FSK、FM和QPSK調(diào)制解調(diào);3、設(shè)計(jì)并實(shí)現(xiàn)了中頻多通道寬帶數(shù)字信號處理系統(tǒng),包括主要器件的介紹、中頻多通道寬帶數(shù)字信號處理系統(tǒng)的詳細(xì)設(shè)計(jì)及處理流程�？梢詫�(shí)現(xiàn)同一種信號的超寬頻段(240MHz=20MHz*12通道)識別,或者三種不同信號的寬頻段(80MHz=20MHz*4通道)識別,實(shí)用性和擴(kuò)展性強(qiáng)。;4、在中頻多通道寬帶數(shù)字信號處理系統(tǒng)中實(shí)現(xiàn)多路解調(diào),比如FSK、FM和QPSK解調(diào)等,最后進(jìn)行了試驗(yàn)驗(yàn)證(信噪比SNR=12dB時,FSK、FM+QPSK解調(diào)無誤碼)。本文的研究工作主要基于實(shí)際應(yīng)用,對其他軟件無線電系統(tǒng)還有具有一定的參考價值。而且可以通過FPGA和DSP相關(guān)工作的進(jìn)一步開展,可以在這套中頻多通道寬帶數(shù)字信號處理系統(tǒng)中實(shí)現(xiàn)對更多目標(biāo)信號進(jìn)行分析和解調(diào),包括定頻、跳頻信號。
[Abstract]:Software radio is one of the important developing trends of wireless communication system. The core idea is to adopt a general, standard and modular hardware system, and to realize various functions of wireless communication system by loading different software. Software radio enhances the flexibility and versatility of wireless communication systems. System upgrades and interconnections between systems will be very convenient. The software radio system is mainly composed of RF processing part (including antenna), if processing part and control software. At present, if processing part is still the focus of software radio research. The if processing part usually has only a few channels. In the face of the increase of information and the demand of signal processing speed, this paper is mainly based on the software radio theory, combined with the current hardware technology level and digital signal processing theory, in order to be practical. In this paper, a multi-channel broadband digital signal processing system is designed, which is based on CPCI bus and has three if four-channel broadband digital signal processing platform, which can process 12 channels at the same time. Each channel has a bandwidth of 20 MHz, with a maximum coverage of 240 MHz. Each if four-channel wideband digital signal processing platform is composed of AD,FPGA,DSP and CPCI bus. The communication speed of CPCI bus is more than 33Mbyte / s. High speed DSP and FPGA are used to complete digital signal processing to improve the programmability of the platform. The processing speed of the A / D device is 90 MHz. The system can complete signal processing, baseband analysis and demodulation based on if 70 MHz and bandwidth 20MHz. The main work of this paper is as follows: 1. Consulting and analyzing the software radio theory and the software radio system that can be realized at present; 2. Learning and mastering the principle of general if wideband digital signal processing platform: signal sampling theory, multi-rate signal processing, digital up-down conversion, hardware structure of software radio platform, programmable logic device, A / D / A conversion and FSK,FM and QPSK modulation and demodulation; 3. The if multi-channel broadband digital signal processing system is designed and implemented, including the introduction of main devices, the detailed design and processing flow of if multi-channel broadband digital signal processing system. It can be used to recognize the same signal in the ultra-wide band (240MHz=20MHz*12 channel) or three different signals in the wide band (80MHz=20MHz*4 channel), which has strong practicability and expansibility. 4. In if multi-channel wideband digital signal processing system, multi-channel demodulation, such as FSK,FM and QPSK demodulation, is realized. Finally, the experiment is carried out (SNR SNR=12dB, FSK,FM QPSK demodulation error code). The research work in this paper is mainly based on practical application and has some reference value for other software radio systems. Furthermore, through the further development of FPGA and DSP related work, more target signals can be analyzed and demodulated in this if multi-channel broadband digital signal processing system, including fixed frequency and frequency hopping signals.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN911.72

【參考文獻(xiàn)】

相關(guān)期刊論文 前2條

1 岳斌;;4G中軟件無線電技術(shù)的應(yīng)用[J];數(shù)字通信世界;2005年08期

2 陶玉柱;胡建旺;崔佩璋;;軟件無線電技術(shù)綜述[J];通信技術(shù);2011年01期

相關(guān)碩士學(xué)位論文 前3條

1 張振強(qiáng);基于軟件無線電的接收機(jī)系統(tǒng)研究與設(shè)計(jì)[D];杭州電子科技大學(xué);2011年

2 王輝;軟件無線電調(diào)制解調(diào)器的設(shè)計(jì)[D];南京理工大學(xué);2010年

3 周維;基于FPGA的寬帶信道化數(shù)字接收機(jī)研究與實(shí)現(xiàn)[D];電子科技大學(xué);2012年

，

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