Magazine Article

LDPC-PPM Coding Scheme for Optical Communication

TBMG-5687

09/01/2009

Abstract
Content

In a proposed coding-and-modulation/ demodulation-and-decoding scheme for a free-space optical communication system, an error-correcting code of the low-density parity-check (LDPC) type would be concatenated with a modulation code that consists of a mapping of bits to pulse-position-modulation (PPM) symbols. Hence, the scheme is denoted LDPC-PPM. This scheme could be considered a competitor of a related prior scheme in which an outer convolutional error-correcting code is concatenated with an interleaving operation, a bit-accumulation operation, and a PPM inner code. Both the prior and present schemes can be characterized as serially concatenated pulse-position modulation (SCPPM) coding schemes.

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Citation
"LDPC-PPM Coding Scheme for Optical Communication," Mobility Engineering, September 1, 2009.
Additional Details
Publisher
Published
Sep 1, 2009
Product Code
TBMG-5687
Content Type
Magazine Article
Language
English