Title :
Coding for the unsynchronized optical OPPM channel
Author :
Calderbank, A.R. ; Georghiades, C.N.
Author_Institution :
AT&T Bell Lab., Murray Hill, NJ, USA
Abstract :
For channels utilizing OPPM (overlapping pulse position modulation) signaling, the authors introduce modulation codes that produce synchronizable sequences, and joint synchronization and detection algorithms that use the memory introduced by these codes to produce joint estimates of symbol boundaries and transmitted symbols. The performance of these codes shows a drastic improvement over uncoded communication when symbol synchronization is not present. Even after symbol synchronization is achieved, some of the codes still provide a significant coding gain over uncoded systems
Keywords :
channel coding; optical communication; optical modulation; optical signal detection; pulse code modulation; pulse position modulation; sequences; symbol manipulation; synchronisation; coding gain; joint synchronization and detection algorithms; memory; modulation codes; overlapping pulse position modulation; performance; symbol synchronization; synchronizable sequences; unsynchronized optical OPPM channel; Automata; Block codes; Maximum likelihood estimation; Optical modulation; Optical pulses; Optical receivers; Optical sensors; Optical transmitters; Pulse modulation; Space vector pulse width modulation;
Conference_Titel :
Communications, 1993. ICC '93 Geneva. Technical Program, Conference Record, IEEE International Conference on
Conference_Location :
Geneva
Print_ISBN :
0-7803-0950-2
DOI :
10.1109/ICC.1993.397326
