| Autor: |
R.T. Unwin, R.A. Cryan |
| Rok vydání: |
2002 |
| Předmět: |
|
| Zdroj: |
[Proceedings] GLOBECOM '90: IEEE Global Telecommunications Conference and Exhibition. |
| Popis: |
A performance and optimization analysis for a Reed-Solomon-coded n-ary pulse-position-modulation (PPM) scheme operating over a fiber channel employing heterodyne detection and assuming a Gaussian received pulse shape is presented. Calculated results for transmission efficiency as a function of fiber bandwidth and as a function of PPM symbol size are discussed. It is concluded that the Reed-Solomon coded n-ary PPM system offers an improvement in transmission efficiency of typically 4.1 dB over an uncoded system and 11.8 dB over a heterodyne amplitude-shift-keyed pulse-code-modulated (ASK PCM) system. It is shown that a Reed-Solomon-coded n-ary PPM system can offer the same transmission efficiency as an uncoded system but at a substantially reduced bandwidth and clock rate. > |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
