By Topic

Decision-feedback equalization of pulse-position modulation on measured non-directed indoor infrared channels

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
Audeh, M.D. ; Telesis Technol. Lab., San Ramon, CA, USA ; Kahn, J.M. ; Barry, J.R.

We examine the performance of two decision-feedback equalizers (DFEs) for pulse-position modulation (PPM) on measured non-directed indoor infrared channels with intersymbol interference (ISI). PPM offers high average-power efficiency, but on ISI channels, unequalized PPM suffers severe performance penalties. We have previously examined the performance of the maximum-likelihood sequence detector (MLSD), and found that it yields significant improvements. However the MLSD often requires such large complexity and delay that it may be impractical. We investigate suboptimal, reduced-complexity equalization techniques for PPM, providing a performance analysis of zero-forcing chip-rate and symbol-rate DFEs. Detailed performance results for 2-, 4-, 8-, and 16-PPM links at bit rates of 10 Mb/s and 30 Mb/s over 46 actual measured indoor infrared channels are presented for these two DFEs. Our results show that a symbol-rate DFE provides performance that closely approaches that of the optimal MLSD

Published in:

Communications, 1996. ICC '96, Conference Record, Converging Technologies for Tomorrow's Applications. 1996 IEEE International Conference on  (Volume:2 )

Date of Conference:

23-27 Jun 1996