Title :
Position detection improvement of position sensitive detector (PSD) by using analog and digital signal processing
Author :
Guanghui, Wang ; Shum, Ping ; Guoliang, Xu ; Xuping, Zhang
Author_Institution :
Nanyang Technol. Univ., Singapore
Abstract :
In free space optical communication (FSO) system, the acquisition, tracking and pointing (ATP) is very important for system performance. In AirLink-E100 system, we use position sensitive detector (PSD), which has good position linearity and big detection area, to measure angle deviation in ATP. But due to the background light and the dark current, the angle precision of PSD direct detection can not match the requirement of the precision angle measurement. In this article, difference methods achieved by analog signal processing and digital signal processing are adopted to solve this problem and improve the performance of ATP. By experiment, the validity of this method has been verified.
Keywords :
angular measurement; optical communication; position measurement; signal processing; space communication links; AirLink-E100 system; analog signal processing; angle deviation measurement; digital signal processing; free space optical communication system; position detection improvement; position sensitive detector; precision angle measurement; Area measurement; Current measurement; Dark current; Digital signal processing; Goniometers; Linearity; Optical fiber communication; Position measurement; Position sensitive particle detectors; System performance; ATP; Detection; Difference; FSO; Matched Filter; PSD; Singnal Processing;
Conference_Titel :
Information, Communications & Signal Processing, 2007 6th International Conference on
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-0982-2
Electronic_ISBN :
978-1-4244-0983-9
DOI :
10.1109/ICICS.2007.4449871
