本文關(guān)鍵詞： GNSS接收機(jī) DSP 軟件測(cè)試 可靠性評(píng)估　出處：《電子科技大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著全球衛(wèi)星導(dǎo)航系統(tǒng)(GNSS)的建設(shè),在國(guó)民經(jīng)濟(jì)和國(guó)防建設(shè)中各種導(dǎo)航定位接收機(jī)的應(yīng)用越來(lái)越廣泛,功能日益豐富,設(shè)計(jì)也越來(lái)越復(fù)雜。作為GNSS的應(yīng)用終端,其地位也越來(lái)越重要。目前軟件接收機(jī)逐步占據(jù)了主流市場(chǎng),那么對(duì)于用戶來(lái)說(shuō),接收機(jī)的軟件質(zhì)量與可靠性至關(guān)重要的,其可靠性將直接決定整個(gè)系統(tǒng)是否可靠。若要保證軟件的質(zhì)量,測(cè)試是關(guān)鍵。而軟件開(kāi)發(fā)者往往忽略了開(kāi)發(fā)過(guò)程中測(cè)試的重要性而偏重于產(chǎn)品的性能測(cè)試,這些測(cè)試項(xiàng)目都是在硬件的基礎(chǔ)上基于整機(jī)的黑盒測(cè)試,忽略了程序的內(nèi)部運(yùn)行情況,未考慮到代碼執(zhí)行時(shí)產(chǎn)生的不可靠因素,這樣便導(dǎo)致軟件故障原因的查找困難并且需要付出較大代價(jià)。本文針對(duì)GNSS接收機(jī)DSP信號(hào)與數(shù)據(jù)處理軟件,以可靠性評(píng)估為目的,主要進(jìn)行了如下幾方面工作:(1)對(duì)GNSS接收機(jī)進(jìn)行詳細(xì)分析,結(jié)合傳統(tǒng)的軟件測(cè)試方法,針對(duì)被測(cè)對(duì)象的設(shè)計(jì)及功能結(jié)構(gòu),制定本課題的測(cè)試策略。(2)基于MATLAB和DSP開(kāi)發(fā)環(huán)境CCS建立了DSP嵌入式軟件測(cè)試環(huán)境,使用CCSLink開(kāi)發(fā)工具實(shí)現(xiàn)了MATLAB與CCS及硬件DSP的雙向連接。(3)在MATLAB環(huán)境下對(duì)測(cè)試系統(tǒng)的GUI、信號(hào)產(chǎn)生、測(cè)試驅(qū)動(dòng)及數(shù)據(jù)分析模塊進(jìn)行設(shè)計(jì)與實(shí)現(xiàn),生成測(cè)試用例驅(qū)動(dòng)被測(cè)軟件運(yùn)行并獲取測(cè)試結(jié)果。(4)從單元、集成測(cè)試和可靠性評(píng)估這三個(gè)階段分別給出了具體的測(cè)試方案,在單元測(cè)試和集成測(cè)試階段分別闡述了測(cè)試流程和步驟,給出了基于BitMap技術(shù)的插樁點(diǎn)設(shè)置及路徑覆蓋度和誤碼率指標(biāo)的獲取方法。在可靠性評(píng)估階段,針對(duì)高可靠性軟件短期內(nèi)失效數(shù)據(jù)收集困難,可靠度無(wú)法用可靠性模型擬合的問(wèn)題,首次提出一種根據(jù)可靠性指標(biāo)間接評(píng)估可靠性的方法,分別從測(cè)試條件、潛在威脅和異常測(cè)試的角度給出了測(cè)試指標(biāo)的選取和定義,并建立模糊決策模型給出了可靠性指標(biāo)間接評(píng)估模型參數(shù)的推導(dǎo)過(guò)程,使得評(píng)估結(jié)果的置信度在理論上得以提升。
[Abstract]:With the construction of global satellite navigation system (GNSS), the applications of various navigation and positioning receivers in the national economy and national defense are becoming more and more extensive, the functions are becoming more and more abundant, and the design is becoming more and more complicated. Its status is also becoming more and more important. At present, the software receiver has gradually occupied the mainstream market, so for users, the software quality and reliability of the receiver is very important. The reliability will directly determine the reliability of the whole system. To ensure the quality of the software, testing is the key. Software developers tend to ignore the importance of testing in the development process and focus on the performance testing of the product. These test projects are based on hardware, black-box testing, ignoring the internal operation of the program, not taking into account the unreliability of code execution, In this way, it will be difficult to find the cause of the software failure and will have to pay a large price. The purpose of this paper is to evaluate the reliability of the DSP signal and data processing software of the GNSS receiver. The main work is as follows: 1) the GNSS receiver is analyzed in detail. Combining with the traditional software testing method, the design and function structure of the object under test are discussed. Based on MATLAB and DSP development environment CCS, the embedded software testing environment of DSP is established. The bidirectional connection between MATLAB and CCS and hardware DSP is realized by using CCSLink development tool. In MATLAB environment, the gui and signal of the test system are generated. Test driver and data analysis module are designed and implemented to generate test case driven test software running and obtain test results. In the phase of unit test and integrated test, the test flow and steps are described, and the setting of the insertion point based on BitMap technology and the method of obtaining the index of path coverage and error rate are given. In view of the difficulty of collecting failure data in a short period of time and the problem that reliability can not be fitted with reliability model, a method of indirectly evaluating reliability according to reliability index is proposed for the first time. The selection and definition of test indexes are given from the angles of potential threat and abnormal testing, and the fuzzy decision model is established to derive the parameters of indirect evaluation model of reliability index, which improves the confidence of evaluation results theoretically.
【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)】：TN965.5

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相關(guān)碩士學(xué)位論文 前1條

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本文編號(hào)：1525627