OPTICAL QPPM COMMUNICATION SUBSYSTEM FOR FREE-SPACE LINKS

被引：0
|
作者：
WIESMANN, T
BORNER, S
OHM, G
机构：
来源：
SPACE COMMUNICATIONS | 1990年 / 7卷 / 4-6期
关键词：
FREE-SPACE OPTICAL LINK; LASER DIODE; LASER DIODE COLLIMATOR; QPPM FORMAT; DIRECT DETECTION; MAXIMUM LIKELIHOOD DETECTION;
D O I：
暂无
中图分类号：
V [航空、航天];
学科分类号：
08 ; 0825 ;
摘要：
The European Space Agency is planning a free-space optical communication experiment using semiconductor laser transmitters and direct detection. The complete communication subsystem breadboard has been developed and tested. On the transmit side it contains a modulator for NRZ/QPPM data format conversion, a laser driver providing drive current and power control for the transmitter laser diode and a laser diode transmitter package with the laser diode and collimating optics. The receiver consists of a low-noise receiver front end and a demodulator employing maximum likelihood detection. The tests of the complete subsystem yielded performance to within 1 dB of the expected data. At a data rate of 60 Mbit/s, a minimum receive power of -58.5 dBm is required.
引用
收藏
页码：443 / 450
页数：8
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