4G对北斗RDSS系统的干扰分析及应对策略

针对4G系统对北斗系统无线电测定业务(RDSS)产生的邻频干扰问题,提出了一种基于整机模块分解的影响分析方法,从理论上归纳出用户机抑制带外干扰的主要技术措施,两个关键指标是有效带宽和处理增益,主要模块是射频模块(RF).根据理论分析,设计了不同参数的射频通道,并在测试平台上验证了各射频通道的带外抑制能力,分析了测试结果的规律性和差异性.研究成果可为北斗系统与4G系统兼容共存提供技术基础.

Jam analysis and coping strategies of 4G on BeiDou RDSS system

Aimed at the problem of adjacent frequency jam caused by 4G system on Radio Determination Satellite Service (RDSS) of Beidou system, the analysis way based on the decomposition of whole machine module is proposed. The main technical measures of restraining from out of band jam are summarized theoretically. Effective bandwidth and processing gain are two key indexes, and the main module is Radio Frequency (RF) module. According to the results of theory analysis, the different RF channels of different apparatus parameters are designed, and the out of band rejection ability of each RF channel is verified on the united test platform. The law and otherness of the test results are described. The research results can provide technical foundation for the compatible coexistence of Beidou system and 4G system.