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An optically preamplified digital PPM receiver with improved suboptimum filtering
Author(s) -
Phillips A. J.,
Cryan R. A.,
Senior J. M.
Publication year - 1997
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/(sici)1098-2760(199701)14:1<23::aid-mop8>3.0.co;2-o
Subject(s) - pulse position modulation , on off keying , sensitivity (control systems) , electronic engineering , optical filter , computer science , physics , optics , telecommunications , bit error rate , pulse (music) , engineering , decoding methods , pulse amplitude modulation , phase shift keying , detector
Original analysis and results are given for an optically preamplified digital pulse‐position‐modulation (PPM) receiver with an improved electrical‐domain filtering regime consisting of a matched filter cascaded with a pulse‐shaping network. Impressive sensitivity results are reported, with the 21.54 photons/bit predicted at 622 Mbit/s, surpassing both an equivalent optically preamplified on‐off keyed nonreturn‐to‐zero (OOK NRZ) system (by 8.1 dB) and the fundamental limit of such a preamplified OOK NRZ receiver. © 1997 John Wiley & Sons, Inc.