Interleaved concatenated coding for the turbulent atmosphericdirect detection optical communication channel |
| |
| Authors: | Koh YT Davidson F |
| |
| Affiliation: | Dept. of Electr. & Comput. Eng., Johns Hopkins Univ., Baltimore, MD; |
| |
| Abstract: | The performance of two concatenated coding systems using a K =3, R=1/2 convolutional inner code and a Reed-Solomon (RS) (15, 9) or (15, 7) outer code was measured over a 5.76-km-long atmospheric direct detection optical communication channel. Inner code interleaving of 100 μs combined with outer code interleaving of 240 bits (60 RS symbols) was found to be sufficient to obtain a decoded BER of less than 10-6 under conditions of moderate channel turbulence and an average of 6-10 detected photons per channel bit |
| |
| Keywords: | |
|
|
