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Digital pulse interval modulation for IR communication systems—a review
Author(s) -
Ghassemlooy Z.,
Hayes A. R.
Publication year - 2000
Publication title -
international journal of communication systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.344
H-Index - 49
eISSN - 1099-1131
pISSN - 1074-5351
DOI - 10.1002/1099-1131(200011/12)13:7/8<519::aid-dac454>3.0.co;2-5
Subject(s) - pulse position modulation , computer science , detector , spectral efficiency , keying , modulation (music) , intensity modulation , pulse amplitude modulation , bit error rate , on off keying , symbol rate , electronic engineering , bandwidth (computing) , quadrature amplitude modulation , telecommunications , optics , physics , pulse (music) , decoding methods , phase modulation , channel (broadcasting) , acoustics , phase noise , engineering
This paper presents a brief review of infrared communications systems, modulation techniques and in particular, a digital pulse modulation scheme known as digital pulse interval modulation (DPIM) for infrared (IR) communication systems employing intensity modulation with direct detection (IM/DD). DPIM code characteristics, power spectral density and error probability in terms of the packet error rate are discussed. Performance comparison is made with that of on–off keying (OOK) and pulse position modulation (PPM). For comparison, relevant expressions for both OOK and PPM are also presented. Using a threshold‐detector‐based receiver, we show that DPIM outperforms both OOK and PPM in terms of power efficiency and PPM in terms of bandwidth efficiency, by taking advantage of its inherent variable symbol duration. However, using a maximum‐ a posteriori (MAP) detector it provides marginally inferior error rate performance compared with PPM. Copyright © 2000 John Wiley & Sons, Ltd.