Pulsewidth-constrained signals are developed for use on the degraded direct-detection optical channel. A two-dimensional representation for these signals is obtained and used to design a trellis-coded-modulation (TCM) system for use on the optical channel. The theoretical advantage of optical TCM is shown, through use of the cutoff rate, to range from 7.5 to 9 dB, depending on the throughput rate of the system. The practical potential is shown, through the actual design of a TCM system, to be as high as 6.7 dB.
|Title of host publication||Unknown Host Publication Title|
|Place of Publication||New York, NY, USA|
|Publisher||Publ by IEEE|
|Number of pages||6|
|State||Published - Dec 1 1988|
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