FM-CDR在广州地区的传输覆盖情况

FM-CDR Transmission Coverage in Guangzhou

结合市区及周边不同区域地形情况,采用定点接收和移动接收等不同的收测方式,获取调频段数字广播(简称FM-CDR)在广州地区的地面无线覆盖和主观收听情况的第一手材料,包括所有点的信号接收场强、地理坐标和主观收听等数据,初步验证了FM-CDR作为一种新型的调频广播无线覆盖和接收模式替代传统调频模拟广播的可行性,以及在实际运用中存在的一些瑕疵。广州越秀山发射点采用数模同播模式中的模式9,同时传输3套广播立体声节目的模式,节目收听质量略逊于传统的模拟调频广播,通过改变FM-CDR的工作模式,增加数字广播数据传输率,提升节目收听质量。

Combined with terrain conditions of different areas in urban and surrounding areas,the paper adopts different receiving methods such as fixed-point reception and mobile reception,obtains first-hand materials for terrestrial wireless coverage and subjective listening of FM-CDR in Guangzhou,including signal receiving field strength,geographic coordinates and subjective listening data of all points.Feasibility of FM-CDR as a new type of FM radio coverage and receiving mode to replace traditional FM analog broadcasting is preliminarily verified,as well as some defects in practical application.Yuexiushan launch site in Guangzhou adopts mode 9 in digital-to-analog simulcast mode,and simultaneously transmits 3 sets of broadcast stereo programs.By changing FM-CDR working mode,data transmission rate of digital broadcasting can be increased and program listening quality can be improved.