對於車用電子產品而言，汽車由於各種直流馬達以及點火系統的影響，處於相當惡劣的電磁環境，本論文為研究車用數位電視的電磁干擾及電磁耐受特性，可分成三個部份。第一部份首先先針對國內目前所採用的數位電視規格DVB-T系統作介紹，接下來在第二部份會分別對數位電視以實車測試以及實驗室中測試的結果作分析及比較，實車測試的部份主要是要瞭解數位電視在車上收看時主要的干擾來源為何，以及如何對數位電視產生干擾，在實驗室測試的部份則以ISO 7637對數位電視進行暫態耐受測試，分析ISO 7637各波形所代表之意義以及對數位電視的影響，並且將ISO 7637觀察到對數位電視的影響及在實車測試時的影響作比較。在第三部份則針對各種使數位電視在收看時造成之干擾尋求改善之對策。

In general the automotive electromagnetic environment is severe because of the presence of DC motors and ignition. In this thesis, electromagnetic interference and electromagnetic susceptibility are studied. This thesis is divided intro three parts. In Part I we introduce the specification of digital TV (DVB-T) in Taiwan. In Part 2 the reception of digital TV in vehicle and in laboratory is compared. The measurement in vehicle is conducted in order to understand the source of interference and how the disturbance occurs. The standard test in laboratory has to do with the transient susceptibility which is based on ISO 7637. We then analyze the implication of different pulses mandated in ISO 7637. The results are compared with those obtained in vehicular measurement. In Part 3 remedy is proposed to reduce the interference to digital TV.

第一章 緒論 1
1.1研究背景與動機1
1.2研究方法2
第二章 數位電視規格介紹 3
2.1數位電視發展現況3
2.2數位電視接收機規格及性能 5
2.3 DVB-T系統介紹 6
2.4環境對車用數位電視接收機之影響 15
第三章 汽車內部干擾來源分析22
3.1車輛的EMI產生來源22
3.2 ISO 7637傳導暫態測試分析26
3.3線束及負載之效應37
3.4測試脈波對數位電視之影響47
3.5數位電視EMI來源分析57
3.6傳導型及輻射型EMI測試與分析59
第四章 抑制元件之原理與應用66
4.1抑制元件之基本原理66
4.2抑制對策之效果73
第五章 結論82
參考文獻83

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