【摘要】：近些年,通信技術(shù)日新月異,應(yīng)用于無線通信的編碼、調(diào)制技術(shù)不斷改進(jìn),產(chǎn)生出許多用以優(yōu)化帶寬利用率、提高通信質(zhì)量的新方法。人類享受更高通信質(zhì)量的同時(shí)也給測(cè)試領(lǐng)域提出了新的更大的挑戰(zhàn)。基于改善通信中的頻譜容量和性能的考慮,完善的RF(射頻)技術(shù),如自適應(yīng)調(diào)制、信號(hào)突發(fā)和跳頻等被應(yīng)用于通信傳輸中,此類技術(shù)不僅使得信號(hào)具有突發(fā)瞬變性而且表現(xiàn)出調(diào)制和頻率隨時(shí)間變化的特點(diǎn)。因此需要采用新的測(cè)試方案和更強(qiáng)大的信號(hào)監(jiān)測(cè)功能來幫助發(fā)現(xiàn)、識(shí)別并捕獲各種突發(fā)瞬態(tài)信號(hào)以及淹沒在大信號(hào)下的小信號(hào)。本文基于頻譜分析技術(shù)的國內(nèi)外發(fā)展概況,提出具有數(shù)字熒光顯示和多種觸發(fā)捕獲功能的實(shí)時(shí)頻譜分析系統(tǒng),重點(diǎn)研究和分析了頻譜分析中的重疊幀技術(shù)、觸發(fā)捕獲技術(shù)、數(shù)字熒光顯示技術(shù)等。其中利用重疊幀滑動(dòng)步進(jìn)有效地解決了頻譜分析中的窗口效應(yīng),避免信號(hào)丟失。頻率模板觸發(fā)技術(shù)采用二維觸發(fā)方式和存儲(chǔ)控制方案觸發(fā)采集各種異常信號(hào)。數(shù)字熒光顯示技術(shù)通過高速傅里葉變換、數(shù)據(jù)壓縮技術(shù)以及顏色等級(jí)設(shè)置,生動(dòng)、直觀地區(qū)分信號(hào)一段時(shí)間內(nèi)的變化細(xì)節(jié),文中同時(shí)在該部分權(quán)衡分析了兩種位圖數(shù)據(jù)提取方案,大大地緩解了系統(tǒng)各部分?jǐn)?shù)據(jù)處理壓力。另外本文還創(chuàng)新性地提出并實(shí)現(xiàn)了基于FPGA(現(xiàn)場可編程門陣列)的任意小數(shù)點(diǎn)位置對(duì)數(shù)運(yùn)算。結(jié)合工程實(shí)踐,對(duì)各模塊在FPGA中的實(shí)現(xiàn)做了整體性能優(yōu)化,并通過實(shí)時(shí)觸發(fā)模塊和數(shù)字熒光顯示模塊的實(shí)現(xiàn)對(duì)FPGA時(shí)序、芯片資源、功耗等方面做了優(yōu)化分析并給出了相應(yīng)的優(yōu)化方案。最后通過完備的測(cè)試方案和軟硬件測(cè)試平臺(tái)對(duì)整個(gè)系統(tǒng)以及系統(tǒng)中各個(gè)模塊進(jìn)行了測(cè)試,給出了測(cè)試結(jié)果。本文設(shè)計(jì)實(shí)現(xiàn)的頻譜分析、各種觸發(fā)捕獲功能以及數(shù)字熒光顯示功能達(dá)到了設(shè)計(jì)指標(biāo)要求,文中不僅給出了軟件仿真結(jié)果,而且最后通過工程測(cè)試得到了實(shí)際的應(yīng)用結(jié)果。通過軟件仿真和最終的工程測(cè)試,系統(tǒng)各模塊工作正常,穩(wěn)定可靠,充分驗(yàn)證了文中各算法的可行性�？蓱�(yīng)用于各種測(cè)量儀器中。
[Abstract]:In recent years, communication technology has changed with each passing day, and it has been applied to the coding of wireless communication. Modulation technology has been continuously improved, resulting in many new methods to optimize the utilization of bandwidth and improve the quality of communication. While human beings enjoy higher communication quality, they also pose new and greater challenges to the field of testing. Based on the consideration of improving the spectrum capacity and performance in communication, perfect RF (Radio Frequency) technology, such as adaptive modulation, signal burst and frequency hopping, is used in communication transmission. This kind of technology not only makes the signal have sudden transient, but also shows modulation and frequency varying with time. Therefore, it is necessary to adopt new testing scheme and more powerful signal monitoring function to help discover, identify and capture all kinds of burst transient signals and small signals submerged in large signals. Based on the development of spectrum analysis technology at home and abroad, a real-time spectrum analysis system with digital fluorescence display and multiple trigger capture functions is proposed in this paper. The overlapping frame technology and trigger acquisition technology in spectrum analysis are mainly studied and analyzed. Digital fluorescence display technology, etc. The window effect in spectrum analysis is effectively solved by sliding step of overlapping frame, and the signal loss is avoided. Frequency template trigger technology uses two-dimensional trigger mode and storage control scheme to trigger and collect all kinds of abnormal signals. Digital fluorescence display technology through high-speed Fourier transform, data compression technology and color level settings, vivid, intuitive signal over a period of time changes in detail, At the same time, two kinds of bitmap data extraction schemes are analyzed in this part, which greatly alleviates the pressure of data processing in each part of the system. In addition, the logarithm operation of arbitrary decimal points based on FPGA (Field Programmable Gate Array) is proposed and implemented creatively in this paper. Combined with engineering practice, the whole performance of each module in FPGA is optimized, and the timing and chip resources of FPGA are realized by real-time trigger module and digital fluorescence display module. Power consumption and other aspects of optimization analysis and give the corresponding optimization scheme. Finally, the whole system and each module of the system are tested through a complete test scheme and software and hardware test platform, and the test results are given. The spectrum analysis, trigger capture function and digital fluorescence display function designed in this paper meet the requirements of the design target. Not only the software simulation results are given, but also the practical application results are obtained through the engineering test. Through software simulation and final engineering test, each module of the system works well and is stable and reliable, which fully verifies the feasibility of the algorithms in the paper. It can be used in all kinds of measuring instruments.
【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)】：TM935.21

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 郭連平;田書林;王志剛;羅浚溢;;并行數(shù)字下變頻中的NCO實(shí)現(xiàn)研究[J];儀器儀表學(xué)報(bào);2012年05期

，

本文編號(hào)：2455410