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Optical Wireless Communications : System Model , Capacity and Coding
| Content Provider | Semantic Scholar |
|---|---|
| Author | Li, Jing Uysal, Murat |
| Copyright Year | 2003 |
| Abstract | This work is motivated by the need to understand the ultimate capacity of the outdoor long-distance optical wireless communication with intensity modulation and direct detection. The channel under weak atmospheric turbulence is modeled as a stationary ergodic channel with lognormal intensity fading, where signals experience asymmetric statistics due to on-off keying signaling. Ergodic channel capacity with several different values of channel parameter σz and outage probabilities are computed to provide an information-theoretic view of the channel. Turbo codes matched to the channel are also investigated to shed insight into how much can be achieved with the state-of-the-art coding schemes. It is shown that fixed rate turbo codes can perform close to the capacity when turbulence is weak, and that variable rate adaptive coding is necessary to bridge the gap when turbulence gets strong. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.cse.lehigh.edu/~jingli/pub/paper/VTC2003.pdf |
| Alternate Webpage(s) | http://www.ece.lehigh.edu/~jingli/pub/paper/VTC2003.pdf |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Adaptive coding Channel capacity Downtime Ergodic theory Ergodicity Information theory Key (cryptography) Modulation On-off keying Optical wireless Population Parameter Probability Quantity Stationary process Turbo code Turbulence |
| Content Type | Text |
| Resource Type | Article |
