Turbo Codes for Pulse Position Modulation: Applying BCJR Algorithm on PPM Signals

In this paper, the authors consider the problem of turbo encoding/decoding for Pulse Position Modulation (PPM) that constitutes a very popular modulation scheme for Free-Space Optical (FSO) communications and unipolar Ultra-WideBand (UWB) communications. At the transmitter side, a simple mapping strategy is applied where the systematic information bit and the parity bit determine the PPM slot in which the signal is to be transmitted. At the receiver side, a convenient demodulation scheme, which is based on the soft decisions generated in all PPM slots, is proposed.

Provided by: Lebanese American University Topic: Networking Date Added: Dec 2011 Format: PDF

Find By Topic