1 广州市的无线通信环境及公安通信的需求 广州市是华南地区最大的工商业城市,中心城区约占全市(原八个行政区域)总面积的五分之一左右。由于市中心建筑密度大,高层建筑多,对无线电波会产生阻挡、反射、屏蔽、吸收等作用,直接影响到无线通信信号的覆盖范围和通话效果。同样条件下,与在开阔 1 Guangzhou’s Wireless Communication Environment and the Needs of Public Security Communication Guangzhou is the largest industrial and commercial city in southern China, accounting for about one-fifth of the total area of ​​the city (formerly eight administrative regions). Due to the high building density and high-rise buildings in downtown, blocking, reflecting, shielding and absorbing the radio waves will directly affect the coverage and call effect of wireless communication signals. Under the same conditions, with the open