Citation
Abstract
A modification of the traditional pulse-position modulation (PPM) scheme typically employed on the optical direct-detection channel is proposed that allows for significantly improved information throughput and bandwidth advantage. The scheme sends a multitude (K) of pulses per symbol interval and as such provides a signal constellation whose size, for a given number of pulse slots (M), varies as MK (for large M) rather than linearly with M, as is the case for conventional PPM. Maximum performance improvement is obtained for deep-space optical communications applications, where narrow high-peak-power transmitted pulses offer significant advantages in terms of detection probabilities and background suppression capabilities at the receiver.
Keywords
pulse position modulation
multi-pulse PPM
optical communication
direct detection
PPM
Details
- Volume
- 42-155
- Published
- November 15, 2003
- Pages
- 1–22
- File Size
- 308.1 KB