CAJ | 학술논문

数字视频地面广播（DVB—T）标准是目前广播电视业以及世界上多国数字地面电视接收测试中评价最高的地面电视广播标准，其技术也已经很成熟。DVB—T系统采用了编码正交频分复用（COFDM）技术，离散导频的插入和数据块本身的循环特性，使得信道估计和均衡的算法简单易行，但同时也降低了系统的频谱利用率。针对该系统接收端的信道估计和均衡这两个问题，进行了理论上的研究，并用Matlah进行了仿真，显示了其在多径信道下的性能。
수자시빈지면엄파（DVB—T）표준시목전엄파전시업이급세계상다국수자지면전시접수측시중평개최고적지면전시엄파표준，기기술야이경흔성숙。DVB—T계통채용료편마정교빈분복용（COFDM）기술，리산도빈적삽입화수거괴본신적순배특성，사득신도고계화균형적산법간단역행，단동시야강저료계통적빈보이용솔。침대해계통접수단적신도고계화균형저량개문제，진행료이론상적연구，병용Matlah진행료방진，현시료기재다경신도하적성능。
DVB - T gets the highest evaluation among all the tested standards of several countries in the broadcasting industry, along with its mature technology. DVB - T system adopts COFDM technology. Both the insert of scattered pilot and the cycle characteristic of data block make the channel estimation and equalization algorithm very easy which this paper will deal with, but meanwhile the pilot reduces the spectrum utilization. The performance of DVB - T in multi - channel will be shown by my simulation using Matlab.