Digital pulse interval modulation for IR communication systems—a review

✍ Scribed by Z. Ghassemlooy; A. R. Hayes

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 246 KB
• Volume: 13
• Category: Article
• ISSN: 1074-5351
• DOI: 10.1002/1099-1131(200011/12)13:7/8<519::aid-dac454>3.0.co;2-5

✦ Synopsis

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}o! 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 e$ciency and PPM in terms of bandwidth e$ciency, 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.