Title :
Performance of pulse-position modulation on measured non-directed indoor infrared channels
Author :
Audeh, Malik D. ; Kahn, Joseph M. ; Barry, John R.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., California Univ., Berkeley, CA, USA
fDate :
6/1/1996 12:00:00 AM
Abstract :
We examine the performance of pulse-position modulation (PPM) on measured channels with intersymbol interference (ISI). We summarize the bit-error-rate performance of unequalized systems and review the performance of maximum-likelihood sequence detection (MLSD) for PPM over ISI channels with additive white Gaussian noise. We evaluate the performance of PPM links over 46 experimentally measured indoor infrared channels. Detailed results are presented for 2, 4, 8, and 16-PPM at bit rates of 10 Mb/s and 30 Mb/s, and these techniques are compared to on-off keying. Our results show that when MLSD is employed, 16-PPM provides the best average-power efficiency among the modulation techniques considered in this study
Keywords :
Gaussian channels; intersymbol interference; maximum likelihood detection; optical communication; pulse position modulation; 10 Mbit/s; 30 Mbit/s; ISI; PPM; additive white Gaussian noise; average-power efficiency; bit-error-rate; intersymbol interference; maximum-likelihood sequence detection; measured channels; modulation techniques; nondirected indoor infrared channels; on-off keying; performance; pulse-position modulation; Gaussian noise; High speed optical techniques; Intersymbol interference; Optical noise; Optical receivers; Pulse measurements; Pulse modulation; Signal to noise ratio; Wireless communication; Working environment noise;
Journal_Title :
Communications, IEEE Transactions on
