Quantum limit of optimum four-level ASK signals with direct detection optically preamplified receivers
نویسندگان
چکیده
منابع مشابه
Quantum limit of optimum four-level ASK signals with direct detection optically preamplified receivers.
We analytically obtain the exact fundamental limit of 4-level amplitude shifted keying formats (4ASK) with direct detection optically preamplified receivers. The optimum multilevel spacing and the corresponding decision thresholds, which depend both on the signal to noise ratio and optical bandwidth, are obtained numerically considering the Chi-squared distribution of each level. The quantum li...
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ژورنال
عنوان ژورنال: Optics Express
سال: 2007
ISSN: 1094-4087
DOI: 10.1364/oe.15.006790