DTMB超保护间隔双站点单频网组网分析与实践

An Analysis and Practice of Constructing the DTMB Single Frequency Network With Exceeding Guard Interval

组建DTMB超保护间隔双站点单频网具有信号覆盖面积宽广、同频干扰区域相对少的优势,根据DTMB单频网覆盖区域的特性,结合ITU-R P.1546场强分析和地形数据分析,归纳了一套在超保护间隔条件下的双站点DTMB单频网组网分析方法,同时利用实际工程路测数据验证了通过该方法预测后匹配宁波地形进行组网的可行性和实用性。

Constructing the DTMB Single Frequency Network（SFN） of double stations with exceeding Guard Interval has the advantages of wide coverage and less Co-channel interference regions. This Paper generalizes an analytic method of constructing the DTMB SFN of double stations under the condition of exceeding Guard Interval based on the characteristics of SFN coverage regions,as well as the ITU-R P. 1546 field strength analysis and topographic data analysis. Meanwhile,it verifies its feasibility and practicability when matching Ningbo topography of this method with the actual data of road engineering surveys.