FAST telescope optical transmission system based on Delta-Sigma Modulation

被引：3
|
作者：
Lin, Wei [1 ]
Zhang, Yang'an [1 ]
Gao, Guanjun [1 ]
Liu, Hongfei [2 ]
Yuan, Xueguang [1 ]
机构：
[1] Beijing Univ Posts & Telecommun, Beijing, Peoples R China
[2] Chinese Acad Sci Beijing, CAS Key Lab FAST, NAOC, Beijing 100101, Peoples R China
来源：
2020 IEEE INTERNATIONAL SYMPOSIUM ON BROADBAND MULTIMEDIA SYSTEMS AND BROADCASTING (BMSB) | 2020年
关键词：
Delta-Sigma; Oversampling; Noise-shaping;
D O I：
10.1109/BMSB49480.2020.9379753
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
This paper proposes a system based on Delta-Sigma modulation to solve the influence of the deflection reflecting surface and the large-scale traction movable feed system on the astronomical signal received by the feed in FAST. Compared with the traditional solution, this solution focuses more on optimizing from the transmitting end. Through oversampling technology and noise-shaping technology, the quantization noise generated by the transmitting end from analog signal to digital signal is reduced. Experimental results show that the amplitude jitter, phase difference, and frequency spectrum of the system have been significantly optimized.
引用
收藏
页数：5
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