数字多媒体广播技术在L波段应用研究

Study of Application of Digital Multimedia Broadcasting Technology in L Band

L波段与传统VHF频段相比,传输损耗更大,在国内还没有在大中型城市的广播电视地面覆盖运用的先例。本文介绍了上海地区L波段多媒体数字广播研究项目的概况和研究成果,阐述了L波段DAB/DMB发射平台传输覆盖前期试验和理论估算,正式网络的实际覆盖测试和理论比对,编码方式的比较试验和传输模式的比较测试等。

Developing DMB services in L band will make DAB to have a new resources and a new development. Because signal transmission loss is higher in L band than in VHF band, so there is no precedent for use of L band in terrestrial broadcasting coverage in China. The document presents the outline and research result of the project of 'The Shanghai DMB in L Band', including transmission coverage's trial and theoretical evaluation of transmitting platform of DAB/DMB in L band, real coverage testing and theory comparison of formal network, and comparison tests between coding patterns and between transmission modes.