DVB-H之通道測量研究與模式分析

MEASUREMENT STUDY OF DVB-H RADIO CHANNEL AND ITS MODEL ANALYSIS

黃文隆(Wen-Lung Huang)

指導教授 ： 黃啟芳

大同大學/電機資訊學院/通訊工程研究所/碩士(2008年)

摘要

台灣數位電視地面廣播(DVB-T)已經正式商業營運，行動電視已普及化至每個人的生活當中，由於行動通訊網路技術快速的發展，利用手機收看電視節目的服務(DVB-H)，亦成為一種趨勢，DVB-H是為DVB-T的延伸擴展，擁有低耗能及較優越的行動接收與抗干擾性，並且以TV anytime & anywhere 以及Free to view的方式特色，未來將打造多元服務與開創無限商機。
台灣共計有五個團隊正進行「手持式行動電視試播」，試播範圍分別為台北市、台中市、高雄市，而因都會區內高樓林立，電波在此複雜的環境中，不僅在傳輸路徑會造成路徑損失(Path Loss)，亦會因電波遮蔽效應(Shadow Fading)導致通道衰落(Channel Fading)現象，同時因建物的阻擋，接收端亦會發生多路徑衰落(Multi-Path Fading)情形和建物本身所造成的電波穿透損失而影響收視品質。
本研究之主要目的為DVB-H信號在無線通道中之時變還境下的接收效能，並以華視團隊(CH35-599MHz)為研究之對象，針對其服務區(高雄縣市)進行電波涵蓋模擬與實際訊號量測，量測參數包括電場強度、B.E.R、M.E.R值，以統計分析的方式驗證都會區射頻通道之模型與電波傳播之特性，可做為未來營運者規劃網路之參考依據。

關鍵字

通道模式 ； 通道測量

並列摘要

The Digital TV broadcasting (DVB-T) has been already commercial operation in Taiwan and the mobile TV has been popularized as well. Since the mobile wireless communication network technology develops so fast, it becomes a kind of trend which uses the mobile terminals to watch the TV program. The DVB-H technology is an extension of the DVB-T standard which transmits multimedia services over digital terrestrial broadcasting networks to handheld terminals. It has low average power consumption and high mobility, it also improves the impulse interference of DVB-T. By the way for TV anytime, TV anywhere and Free to view, we can find the multi service and business opportunity.
There are five groups which carry out the mobile TV trial in Taiwan now, and the service coverage including Taipei, Taichung and Kaohsiung. In a complex environment, the channel fading follow the path loss and shadow effect. The radio wave will raise the refraction, reflection and scattering because of the block of buildings and it will generate the multi-path phenomenon and the penetration loss when penetrating the buildings.
The main purpose of this research is for the study about the DVB-H signal efficiency in the wireless channel. We measure the DVB-H signal from the CTS transmitter at the Zhong-Liao Broadcasting Station focusing at the DVB-H service area (Kaohsiung) than it is to have a mobile testing and collect the DVB-H parameters, which are in channel electric field strength, B.E.R and M.E.R values. We can use the statistic model to understand the wireless characteristics and prove the radio channel model in the different environments. This measured data of Kaohsiung should be the good references for the other broadcasting operators or terminal providers developed in the future. .

並列關鍵字

CHANNEL MODEL ； DVB-H

參考文獻

[1] ETSI, ”Digital Video Broadcasting (DVB); DVB-H Implementation

[4] ETSI EN 302 304: "Digital Video Broadcasting (DVB); Transmission System

[5] ETSI, ”Digital Video Broadcasting (DVB); DVB-H Implementation

[6] Raymond Pieck, Inc. “DVB-H Mobile Devices ”.PP.8-12. September 21, 2006.

[7] W. C. Y. Lee, Mobile Communications Design Fundamentals, 2nd ed., John