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Titolo: Bit error probability reduction in direct detection optical receivers using RZ coding
Autore: Pauer, M; Winzer, PJ; Leeb, WR;
 Indirizzi:
 Vienna Univ Technol, A1050 Vienna, Austria Vienna Univ Technol Vienna Austria A1050 echnol, A1050 Vienna, Austria Bell Labs, Lucent Technol, Holmdel, NJ 07733 USA Bell Labs Holmdel NJ USA07733 abs, Lucent Technol, Holmdel, NJ 07733 USA
 Titolo Testata:
 JOURNAL OF LIGHTWAVE TECHNOLOGY
fascicolo: 9,
volume: 19,
anno: 2001,
pagine: 1255  1262
 SICI:
 07338724(200109)19:9<1255:BEPRID>2.0.ZU;2M
 Fonte:
 ISI
 Lingua:
 ENG
 Soggetto:
 SYSTEMS;
 Keywords:
 extinction ratio; impulsive coding; noise; nonreturntozero (NRZ); ONOFF keying; optical receiver; optimum; bandwidth; receiver sensitivity; returntozero (RZ);
 Tipo documento:
 Article
 Natura:
 Periodico
 Settore Disciplinare:
 Engineering, Computing & Technology
 discip_EC
 Citazioni:
 18
 Recensione:
 Indirizzi per estratti:
 Indirizzo: Pauer, M Vienna Univ Technol, A1050 Vienna, Austria Vienna Univ Technol Vienna Austria A1050 1050 Vienna, Austria



 Citazione:
 M. Pauer et al., "Bit error probability reduction in direct detection optical receivers using RZ coding", J LIGHTW T, 19(9), 2001, pp. 12551262
Abstract
We analyze the bit error probability reduction for direct detection ONOFFkeying optical receivers using returntozero (RZ) coding instead of the nonreturntozero (NRZ)format. For the same average optical power, RZ is shown to outperform NRZ, even when employing the same receiver bandwidth. Results are given for receivers whose noise variance is i) dominated by a signalindependent term (e.g., simple pin diode receivers), ii) dominated by a signaldependent term (e.g., optically preamplified receivers), and iii) made up of two equally important contributions [e.g., avalanche photodiode (APD) receivers]. Based on semianalytic simulations including intersymbol interference, we show that the achievable RZ sensitivity gain is typically lessfor dominating signalindependent noise than for dominating signaldependent noise, where it amounts to about 3 dB. We also quantitatively discuss the influence of the optical pulse shape on the achievable RZ coding gain, and show that finite extinction ratios can significantly reduce that gain, especially when the RZ signals are produced by directmodulation methods.
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Documento generato il 18/09/20 alle ore 16:35:57