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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, A-1050 Vienna, Austria Vienna Univ Technol Vienna Austria A-1050 echnol, A-1050 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:
0733-8724(200109)19:9<1255:BEPRID>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
SYSTEMS;
Keywords:
extinction ratio; impulsive coding; noise; nonreturn-to-zero (NRZ); ON-OFF keying; optical receiver; optimum; bandwidth; receiver sensitivity; return-to-zero (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, A-1050 Vienna, Austria Vienna Univ Technol Vienna Austria A-1050 -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. 1255-1262

Abstract

We analyze the bit error probability reduction for direct detection ON-OFFkeying optical receivers using return-to-zero (RZ) coding instead of the nonreturn-to-zero (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 signal-independent term (e.g., simple pin diode receivers), ii) dominated by a signal-dependent 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 signal-independent noise than for dominating signal-dependent 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 direct-modulation methods.

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Documento generato il 18/09/20 alle ore 16:35:57