發(fā)布時(shí)間：2018-05-03 20:15

  本文選題：群相位關(guān)系 + 時(shí)域抖動(dòng)　； 參考：《西安電子科技大學(xué)》2013年碩士論文

【摘要】：目前常見(jiàn)的相位噪聲測(cè)量系統(tǒng)往往基于同頻鑒相原理，在測(cè)量時(shí)需引入復(fù)雜的頻率變換環(huán)節(jié)，不但成本高而且會(huì)引入噪聲，降低測(cè)量精確度。因?yàn)橄到y(tǒng)復(fù)雜、對(duì)配套設(shè)備精度要求高，我國(guó)一直無(wú)法自己生產(chǎn)。本論文是在導(dǎo)師指導(dǎo)下進(jìn)行的我國(guó)自主知識(shí)產(chǎn)權(quán)相噪測(cè)量技術(shù)方面的探索性工作。 論文在研究周期性信號(hào)的群相位變化規(guī)律的基礎(chǔ)上，提出了基于群相位關(guān)系的相位噪聲測(cè)量系統(tǒng)。該系統(tǒng)分下位機(jī)和上位機(jī)兩個(gè)部分，下位機(jī)硬件對(duì)任意頻率信號(hào)直接進(jìn)行頻率測(cè)量和相位比對(duì)，測(cè)量精度可達(dá)5×10~(-12)/s；上位機(jī)讀取硬件所測(cè)數(shù)據(jù)并進(jìn)行處理，，得到被測(cè)信號(hào)的相位噪聲信息。 本文重點(diǎn)對(duì)系統(tǒng)中信號(hào)和數(shù)據(jù)處理進(jìn)行了深入的研究，在對(duì)硬件測(cè)量方法的深入研究下提出了基于群相位關(guān)系的相位抖動(dòng)提取方法及相位抖動(dòng)到單邊帶相位噪聲的轉(zhuǎn)換算法，并進(jìn)行了實(shí)驗(yàn)分析；編寫(xiě)了上位機(jī)程序，從串口讀取的下位機(jī)測(cè)量數(shù)據(jù)中提取出相位抖動(dòng)信息，經(jīng)過(guò)時(shí)域到頻域的轉(zhuǎn)換得到被測(cè)信號(hào)的單邊帶相位噪聲。由于此項(xiàng)研究總體上開(kāi)展時(shí)間不長(zhǎng)，系統(tǒng)暫時(shí)只完成了相位噪聲測(cè)量功能的實(shí)現(xiàn)。目前對(duì)被測(cè)信號(hào)載頻近端的相位噪聲測(cè)量已經(jīng)完成，遠(yuǎn)端的相位噪聲測(cè)量工作還在進(jìn)行中。 該信號(hào)處理方法將群相位理論的應(yīng)用領(lǐng)域擴(kuò)展到了相位噪聲測(cè)量中，省去了一般相位噪聲測(cè)量系統(tǒng)中的頻率變換環(huán)節(jié)，簡(jiǎn)化了系統(tǒng)，節(jié)約了成本，并提高了測(cè)量分辨率，方法新穎，具有重要的意義。
[Abstract]:At present, the common phase noise measurement system is based on the principle of phase discrimination of the same frequency, and it needs to introduce complex frequency transformation in the measurement, which not only costs high cost, but also induces noise and reduces the measurement accuracy. Because the system is complex and the precision of supporting equipment is high, our country has been unable to produce itself. This paper is an exploratory work on the phase noise measurement of independent intellectual property rights under the guidance of our tutor. Based on the study of group phase variation of periodic signals, a phase noise measurement system based on group phase relationship is proposed in this paper. The system is divided into two parts: the lower computer and the upper computer. The hardware of the lower computer carries out the frequency measurement and phase comparison of any frequency signal directly, the measuring precision can reach 5 脳 10 ~ (-10) ~ (-12) / s, the upper computer reads the data measured by the hardware and processes it. The phase noise information of the measured signal is obtained. In this paper, the signal and data processing in the system is deeply studied, and the phase jitter extraction method based on group phase relation and the conversion algorithm from phase jitter to single sideband phase noise are proposed under the research of hardware measurement method. The upper computer program is written to extract the phase jitter information from the measured data of the lower computer which is read from the serial port, and the single sideband phase noise of the measured signal is obtained by converting the time domain to the frequency domain. Because the research is not long, the system only realizes the phase noise measurement function. At present, the phase noise measurement at the near end of the carrier frequency of the measured signal has been completed, and the phase noise measurement of the far end is still in progress. The signal processing method extends the application field of group phase theory to the measurement of phase noise, eliminates the frequency conversion link in the general phase noise measurement system, simplifies the system, saves the cost, and improves the measurement resolution. The method is novel and of great significance.
【學(xué)位授予單位】：西安電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類(lèi)號(hào)】：TN911.7

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