本文選題：電力載波通信　切入點(diǎn)：信道特性　出處：《昆明理工大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：進(jìn)入21世紀(jì),科學(xué)技術(shù)迅速發(fā)展,借助電力線的龐大網(wǎng)絡(luò),得益于只要有電線,就能進(jìn)行數(shù)據(jù)傳輸?shù)膬?yōu)勢(shì),低壓電力載波通信如雨后春筍般迅速發(fā)展。雖然電網(wǎng)的規(guī)模越來(lái)越大,由于用電設(shè)備標(biāo)準(zhǔn)不一,管理維護(hù)不規(guī)范等原因,我國(guó)的電力載波發(fā)展受到嚴(yán)重阻礙。因此,對(duì)低壓電力載波基礎(chǔ)信道的研究測(cè)試顯得尤為重要,而噪聲特性和阻抗特性是電力線信道的兩個(gè)基礎(chǔ)特性。深入研究噪聲特性和阻抗特性使得提高通信質(zhì)量更有針對(duì)性和可行性,對(duì)整個(gè)通信系統(tǒng)的研究有很重要的意義。 本文針對(duì)低壓電力線通信信道的噪聲根據(jù)特點(diǎn)劃分兩大類,并分別建立模型,簡(jiǎn)單討論LD算法參數(shù)求解,驗(yàn)證模型等相關(guān)技術(shù)內(nèi)容。重點(diǎn)研究低壓電力載波信道噪聲特性和阻抗特性,根據(jù)建立的信道噪聲模型和設(shè)備采集的實(shí)際數(shù)據(jù),用MATLAB的強(qiáng)大數(shù)據(jù)處理能力對(duì)采集到的噪聲和阻抗數(shù)據(jù)進(jìn)行處理分析,分析了不同環(huán)境下電力線信道的阻抗變化范圍和脈沖噪聲特性的關(guān)系,進(jìn)而發(fā)現(xiàn)低壓電力線阻抗變化與脈沖噪聲之間存在某種對(duì)應(yīng)關(guān)系。從實(shí)際噪聲數(shù)據(jù)中分離出脈沖噪聲,得到實(shí)際背景噪聲數(shù)據(jù),通過控制實(shí)際背景噪聲的和模型產(chǎn)生的純凈功率譜的絕對(duì)差值,來(lái)選擇擬合最好的模型參數(shù),并驗(yàn)證模型可靠性。根據(jù)模型,在VC6.0平臺(tái)設(shè)計(jì)一款可以分析處理信道噪聲特征參數(shù)的測(cè)試系統(tǒng)軟件。針對(duì)低壓電力線載波通信的惡劣環(huán)境,通過測(cè)試系統(tǒng)可以得到具體的模型參數(shù),以便更好地了解不同環(huán)境噪聲特性。對(duì)復(fù)雜環(huán)境的信道特性,可以更有針對(duì)性的選取適合的通信技術(shù),為提高電力線通信質(zhì)量創(chuàng)造條件。
[Abstract]:In 21th century, with the rapid development of science and technology, with the help of a huge network of power lines, thanks to the advantage of data transmission as long as there are wires, Although the scale of power grid is getting larger and larger, the development of power carrier in our country is seriously hindered because of the different standards of power equipment and non-standard management and maintenance. It is very important to study and test the basic channel of low voltage power carrier. The noise characteristic and impedance characteristic are two basic characteristics of power line channel. It is very important for the whole communication system to study the noise characteristic and impedance characteristic to improve the communication quality more pertinently and feasible. In this paper, the noise of low-voltage power line communication channel is divided into two categories according to the characteristics, and the models are established, and the LD algorithm parameter solution is discussed briefly. The noise characteristics and impedance characteristics of low-voltage power carrier channel are studied emphatically. According to the established channel noise model and the actual data collected by the equipment, the noise characteristics and impedance characteristics of the low-voltage power carrier channel are studied. Using the powerful data processing ability of MATLAB to process and analyze the collected noise and impedance data, the relationship between the range of impedance variation and impulse noise characteristics of power line channel in different environments is analyzed. It is found that there is a corresponding relationship between the impedance variation of low voltage power line and the impulse noise. The impulse noise is separated from the actual noise data and the actual background noise data is obtained. By controlling the absolute difference between the actual background noise and the pure power spectrum generated by the model, the best fitting parameters are selected and the reliability of the model is verified. A test system software is designed on VC6.0 platform, which can analyze and deal with the characteristic parameters of channel noise. In view of the bad environment of low voltage power line carrier communication, the specific model parameters can be obtained by the test system. In order to better understand the noise characteristics of different environments, the channel characteristics of complex environment can be more targeted to select the appropriate communication technology to create conditions for improving the quality of power line communication.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN913.6

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本文編號(hào)：1642595