摘要
快速跳频通信技术中的杂散抑制与快速换频是一对相互制约的矛盾。本文结合销相式跳频频率合成器的研制,讨论了环路中的杂散现象,分析了杂散输出对FSK-FH通信系统检测性能的影响,导出了一种定量计算FSK-FH通信技术中杂散抑制比的有效方法。结果表明,为了保证FSK-FH通信系统正常工作,杂散抑制比指标必须至少大于50dB,其结果对工程设计中频率合成器环路中杂散抑制比的合理选择及有效提高换频速度提供了理论依据。
Based on resolving a pair of contradiction between spur suppressio and fast frequency conversion in an frequeney-hopped (FH) synthesizer, a single loop UHF frequency-hopped synthesizer is introduced, in this paper, and its performances and effects in FSK-FH commu- nication are analyzed; In addition, a phase model for spurious signals in FH synthesizer is de- veloped and the spur effects in an FSK-FH system are systematically investigated. Still fur- ther, a new method to compute a spur suppression ratio in fast FH communication techniques is presented. In accord with the common views on the spur suppression ratio, it concludes that the spur suppression ratio must be at least greater than 50 dB in normal FH communica- tion systems, and the result has reference value in the design of FH communication systems.
出处
《桂林电子工业学院学报》
1992年第1期10-18,共9页
Journal of Guilin Institute of Electronic Technology
关键词
跳频通信
频率合成
杂散抑制
FH communication
frequency synthesis
spur suppression
