Proceedings ArticleDOI
Performance of pulse-position modulation with trellis-coded modulation on non-directed indoor infrared channels
D.C.M. Lee,M.D. Audeh,Joseph M. Kahn +2 more
- Vol. 3, pp 1830-1834
TLDR
The results indicate that TCM is a very promising coding technique for L-PPM on high-speed non-directed infrared channels.Abstract:
We examine the performance of high-speed non-directed infrared links using pulse-position modulation (PPM) with trellis-coded modulation (TCM) to mitigate the effects of multipath-induced intersymbol interference (ISI) on such links. Using the measured characteristics of multipath indoor infrared channels, we calculate BER curves and ISI power penalties for maximum-likelihood sequence detection of 8-PPM links using rate-2/3 trellis codes operating at 10 and 30 Mb/s. Our results indicate that TCM is a very promising coding technique for L-PPM on high-speed non-directed infrared channels.read more
Citations
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Journal ArticleDOI
Trellis-coded pulse-position modulation for indoor wireless infrared communications
TL;DR: It is shown that maximum-likelihood sequence detection (MLSD) of trellis-coded PPM is very effective in mitigating the multipath dispersion on indoor, wireless infrared channels.
Journal ArticleDOI
Trellis-coded multiple-pulse-position modulation for wireless infrared communications
Hyuncheol Park,John R. Barry +1 more
TL;DR: New trellis codes based on multiple-pulse-position modulation for wireless infrared communication are presented, which are less sensitive to multipath dispersion and offer better power efficiency when the desired bit rate is large, compared with the channel bandwidth.
Proceedings ArticleDOI
Trellis-coded multiple-pulse position modulation for wireless infrared communications
Hyuncheol Park,John R. Barry +1 more
TL;DR: New trellis codes based on multiple-pulse position modulation (MPPM) for wireless infrared communication are presented, less sensitive to multipath dispersion and offer better power efficiency when the desired bit rate is large compared to the channel bandwidth.
Proceedings ArticleDOI
Trellis-coded pulse-position modulation for indoor wireless infrared communications
TL;DR: It is shown that maximum-likelihood sequence detection (MLSD) of trellis-coded PPM is very effective in mitigating the multipath dispersion on indoor, wireless infrared channels.
Patent
Architecture of non-synchronous open loop demodulation circuit in pulse position modulation
TL;DR: In this article, a simple demodulation circuit having reduced hardware cost and an increased using flexibility is provided for retrieving a data from a received source signal and includes a transformation circuit operating the source signal to produce a quantized data having a plurality of data slots, a slot address detector electrically connected to the transformation circuit for reaching a peak slot address from addresses of the data slots.
References
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Book
Wireless Infrared Communications
Joseph M. Kahn,John R. Barry +1 more
TL;DR: The use of infrared radiation as a medium for high-speed short-range wireless digital communication, and several modification formats, including on-off keying (OOK), pulse-position modulation (PPM), and subcarrier modulation, are discussed.
Journal ArticleDOI
Wireless in-house data communication via diffuse infrared radiation
F.R. Gfeller,U. Bapst +1 more
TL;DR: In this paper, a novel wireless broadcast/multi-access channel for flexibly interconnecting a cluster of data terminals located within the same room is described, where the transmission medium is diffusively scattered infrared radiation at 950-nm wavelength.
Journal ArticleDOI
Trellis-coded modulation with redundant signal sets Part I: Introduction
TL;DR: An introduction into TCM is given, reasons for the development of TCM are reviewed, and examples of simple TCM schemes are discussed.
Journal ArticleDOI
Experimental characterization of non-directed indoor infrared channels
TL;DR: An analysis indicating why non-directed infrared channels using intensity modulation and direct detection do not exhibit multipath fading, and justifying their representation as linear, time-invariant systems is provided.
Journal ArticleDOI
Wireless in-house data communication via diffuse infrared radiation, RZ 941 (32513)
F. Gfeller,U. Bapst +1 more
TL;DR: A novel wireless broadcast/multi-access channel is described for flexibly interconnecting a cluster of data terminals located within the same room and theoretical analysis indicates that the time dispersion limits the transmission bandwidth of the system to 260 Mbit ċ m/s.