DAB接收机RF模块灵敏度与同步速度优化方法的研究  

DAB receiver RF module synchronization method for high-gain and Fast synchronization research

作　　者：王泽东[1] 

机构地区：[1]重庆邮电大学光电工程学院,重庆400065

出　　处：《数字通信》2012年第2期74-76,80,共4页Digital Communications and Networks

摘　　要：对DAB接收机灵敏度与同步速度的电路优化主要通过对RF模块外围电路的优化来实现。在研究DAB接收机RF模块的中频反馈电路和DAB信号同步控制原理的基础上,研究了反馈电路的优化方法,分析了同步慢的原因,提出了解决方案。测试记录表明:增加一条快速泄放电路可改善同步速度,提高反馈电压增加下信号的增长率益。DAB receiver＇s circuit optimization with sensitivity and synchronous speed can be realized mainly through optimi- zing the external circuit of the RF module. On the basis of researching of the feedback circuit of RF module and DAB signal synchronization control method, sensitivity can be improved by improving the IF feedback voltage to improve the small sig- nal gain, and the synchronous speed of the receiver can be improved by adding a quick discharge circuit. The experiments show that the above method can effectively improve receiver sensitivity and the sync speed.

关 键 词：DAB接收机 RF模块 灵敏度 同步速度 

分 类 号：TN851[电子电信—信息与通信工程] TN934.3