摘要
对于超高速信息传输系统,信道模型变得不再理想,接入超出抖动容限的信号可能产生极其恶劣的后果。不同信息传输系统的抖动容限也不尽相同,多数系统不能容忍超过0.5 UI的信号抖动,而个别系统却可以让超出1 UI抖动的信号通行无阻。因此,误码率测试仪在进行超高速信息传输系统的指标评定时,其输出信号的抖动频率和抖动幅度需要精确可控。鉴于传统调节数据相位的抖动注入方式很难突破1 UI的范围,从正弦信号频率调制的原理出发,提出了一种高动态且参数可调整的抖动信号注入方法,该方法通过对码型发生器输入时钟进行正弦频率调制来完成输出测试信号的抖动控制,能够实现0.1~10 UI范围的高精度抖动注入,已成功应用于超高速误码率测试仪的研制。
For ultra-high speed transmission system,the channel model becomes less than ideal,so it can extremely result in bad consequences by accessing signals that exceed the jtter tolerance.The jitter tolerance of different information transmission systems is also different.Most systems can not tolerate jitter beyond 0.5 UI,while some systems can transmit the signal with jitter beyond 1 UI.This requires that the bit error rate tester can generate a bad signal with controllable jitter frequency and amplitude in the evaluation of ultra-high speed transmission system.Traditional jitter injection method of adjusting data phase is dfficult to exceed the range of1 UI.In the article,we describe a method of inject variable parameter sinusoidal jtter signal for bit error rate tester.This method completed the jitter injection of the output signal by sinusoidal frequency modulation of input clock for the code generator.It achieved the injection effect of o.1~10 UI jitter range,and has been successfully applied to a ultra-high speed bit error rate tester.
作者
贾冒华
童琼
李秀华
赵显峰
刘婷
JIA Maohua;TONG Qiong;LI Xiuhua;ZHAO Xianfeng;LIU Ting(Beijing Institute of Radio Metrology and Measurement,Beijing 100039,China)
出处
《宇航计测技术》
CSCD
2024年第1期66-70,共5页
Journal of Astronautic Metrology and Measurement
关键词
超高速
误码率
测试
抖动注入
频率调制
Ultra-high speed
Bit error rate
Test
Jitter injection
Frequency modulation
