期刊菜单

Design of Communication Eye Diagram Observation System
DOI: 10.12677/OJCS.2020.93006, PDF, HTML, XML, 下载: 346  浏览: 638

Abstract: In the digital signal system, due to the existence of noise and intersymbol interference, the cha-racteristics of the channel are very unstable. In order to stabilize the characteristics of the channel, the problems of noise and intersymbol interference can be effectively solved to enable the infor-mation to be transmitted effectively and avoid the phenomenon of leakage. Therefore, an eye pat-tern observation system is designed to measure the performance of the transmission baseband system through the characteristic parameters observed by the eye pattern observation system. Optical fiber transmission test of digital signal was carried out according to the design of eye pat-tern observation system. The characteristic parameters of eye pattern were obtained according to the test observation, and the opening, thickness and timing jitter ability of eyelid were calculated, which could be used to evaluate the performance of a system.

1. 引言

2. 眼图

2.1. 眼图的定义和形成

Figure 1. Diagram of eye diagram forming system

2.2. 眼图的分析和观测

Figure 2. Eye diagram state diagram

2.3. 眼图参数及系统性能

Figure 3. Eye diagram

3. 眼图观测系统的设计

Figure 4. Diagram of eye diagram observation and design system

Figure 5. Circuit block diagram of optical receiver

Figure 6. Circuit block diagram of optical transmitter

4. 测试结果与分析

Table 1. Test data

Figure 7. Comparison of digital output and PN sequence code type

Figure 8. Output waveform of eye diagram with frequency of 64 K

Figure 9. Output waveform of eye diagram with frequency of 32 K

5. 结论

NOTES

*通讯作者。

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