本文選題：頻譜分析儀 + AXI　； 參考：《電子科技大學》2015年碩士論文

【摘要】：頻譜分析是對信號進行頻域分析的重要手段,要求儀器同時具有時頻轉(zhuǎn)換、頻譜分析和信號處理的能力�，F(xiàn)代無線通信測試不僅要求測試設(shè)備具有實時頻譜測量的能力,還需要具備高動態(tài)范圍,良好的EVM和高SNR。為了適應(yīng)現(xiàn)代信息化戰(zhàn)爭以及電子設(shè)備便攜化的趨勢,通信測量儀器在不僅相比于以前要求更高的性能指標,在集成度方面也提出了更高的要求�，F(xiàn)代戰(zhàn)爭中需要工程兵種能夠使用高度集成化的手持式無線通信測量設(shè)備對戰(zhàn)場進行特定的頻段的無線電磁檢測;在民用方面,通信運營商和無線電監(jiān)測部門對室內(nèi)與室外的電磁環(huán)境進行監(jiān)測,工程人員需要一種輕便的高性能的設(shè)備進行無線信號測量。本文針對以上問題,首先介紹了國內(nèi)外的手持式頻譜儀的發(fā)展動態(tài),分析了常規(guī)的超外差通信接收機結(jié)構(gòu)和高集成度的零中頻通信接收機架構(gòu)以及片上系統(tǒng)ZYNQ系列可擴展處理器。文中研究了ZYNQ系列器件的資源、AXI4總線結(jié)構(gòu)以及其高效率的開發(fā)流程,還介紹了基于零中頻(ZIF)結(jié)構(gòu)的捷變通信收發(fā)芯片AD9361的各種特點,該芯片將濾波,低噪聲放大,混頻,本振,基帶數(shù)據(jù)通信等一系列電路全部集成在了單個芯片上。基于以上研究提出了基于捷變收發(fā)芯片AD9361和全面可編程片上系統(tǒng)芯片xc7z020可編程無線通信收發(fā)機系統(tǒng)方案。設(shè)計了基于ZYNQ片上系統(tǒng)和AD9361的手持式頻譜儀的射頻測量單板電路,將射頻接收、基帶處理和人機界面全部集成在了單個電路板上。在ZYNQ的可編程邏輯部分設(shè)計并實現(xiàn)了雙速率LVDS信號的接收和I/Q信號拼接,直流失調(diào)跟蹤與補償以及I/Q失調(diào)的校準。使用xilinx提供的開發(fā)環(huán)境和橋接IP核進行基于AXI總線的DMA傳輸?shù)拈_發(fā),實現(xiàn)了SOC片內(nèi)可編程邏輯和片內(nèi)ARM核的高速數(shù)據(jù)交互。經(jīng)軟件和硬件聯(lián)合調(diào)試后,使得頻譜儀達到射頻芯片所能達到的性能指標,頻譜測量范圍達到70MHz~6GHz,實時測量帶寬達到50MHz。本論文所論述的極高集成度頻譜分析儀以及基帶信號接收和前級處理單元均能夠正常運行工作,基本達到了預(yù)定的指標和工程技術(shù)要求,在各個測試和實驗的場合中工作穩(wěn)定,使得該手持式頻譜儀可運用于常見的通信測試場合。
[Abstract]:Spectrum analysis is an important means to analyze signals in frequency domain, which requires the ability of time-frequency conversion, spectrum analysis and signal processing. Modern wireless communication testing requires not only the capability of real-time spectrum measurement, but also the capability of high dynamic range, good EVM and high SNR. In order to adapt to the trend of modern information war and portable electronic equipment, communication measuring instruments not only require higher performance than before, but also put forward higher requirements in integration. In modern warfare, engineers are required to be able to use highly integrated hand-held wireless communication measurement equipment to carry out wireless electromagnetic detection in a specific frequency band on the battlefield. Communication operators and radio monitoring departments monitor the electromagnetic environment both indoors and outdoors. Engineers need a portable high performance device for wireless signal measurement. Aiming at the above problems, this paper first introduces the development trends of hand-held spectrometers both at home and abroad. The structure of conventional superheterodyne receiver, the architecture of highly integrated zero-if communication receiver and the ZYNQ series extensible processors of on-chip system are analyzed. In this paper, the resource AXI4 bus structure of ZYNQ series devices and its high efficiency development flow are studied. The characteristics of AD9361 based on ZIF structure are also introduced, which filter, low noise amplification, mixing frequency, local oscillator, etc. A series of circuits such as baseband data communication are integrated on a single chip. Based on the above research, this paper presents a system scheme based on agile transceiver chip (AD9361) and total programmable on-chip system chip (xc7z020) for programmable wireless communication transceiver. The RF measurement circuit of hand-held spectrometer based on ZYNQ and AD9361 is designed. The RF receiver, baseband processing and man-machine interface are all integrated on a single circuit board. In the programmable logic part of ZYNQ, the dual rate LVDS signal receiving and I / Q signal splicing, DC offset tracking and compensation, and I / Q offset calibration are designed and implemented. The DMA transmission based on AXI bus is developed by using the development environment provided by xilinx and the bridging IP core. The high speed data exchange between SOC on-chip programmable logic and on-chip ARM core is realized. After the joint debugging of software and hardware, the spectrometer can achieve the performance index of RF chip. The spectrum measurement range is 70 MHz, and the bandwidth of real-time measurement is 50 MHz. The highly integrated spectrum analyzer, baseband signal receiving and pre-processing unit discussed in this paper can work normally, and basically reach the predetermined targets and engineering technical requirements, and work stably in various testing and experimental situations. So that the hand-held spectrometer can be used in common communication test occasions.
【學位授予單位】：電子科技大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TM935.21
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本文編號：1951948