数字化广播射频干扰冲突的分析与对策

Analysis and Countermeasures of Radio Frequency Interference in Digital Broadcasting

广播数字化是国内外技术研究的热点问题, 我国正处在由模拟广播向数字广播的转换阶段, 调频频段数字广播传输技术CDR, 建立系统构架包括纯数字模式和数模同播模式.在此架构下, FM对FM存在着射频干扰冲突, CDR与FM之间存在干扰冲突, CDR面临射频保护等.通过对同频、 临频、 互调等干扰进行分析, 从频率规划、 结构调整、 发射接收设备的技术改进探寻FM广播的射频保护, 为纯数字化广播的实现提供参考.

Broadcasting digitization is a hot issue in the research of technology at home and abroad. China is in the transition stage from analog broadcasting to digital broadcasting. Under this framework, FM has RF interference con- flicts for FM, CDR and FM have interference conflicts, CDR faces RF protection and so on. Through the analysis of interference such as co-frequency, imminent frequency and intermodulation, this paper explored the radio frequency protection measures of FM broadcasting from the aspects of frequency planning, structural adjustment and the techni- cal progress of transmitting and receiving equipment, and provided a reference for the realization of pure digital broadcasting.