Non-negligible loop delay time influence on coherent optical PSK systems performance degradation

Djordjevic, IB

dc.contributor.author	Djordjevic, IB	en
dc.date.accessioned	2014-03-01T01:16:48Z
dc.date.available	2014-03-01T01:16:48Z
dc.date.issued	2001	en
dc.identifier.issn	01734911	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/14231
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0035415971&partnerID=40&md5=163351636d9aa7d4127dea36e562621d	en
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0035415971&partnerID=40&md5=163351636d9aa7d4127dea36e562621d	en
dc.subject.other	Bit error rate	en
dc.subject.other	Light propagation	en
dc.subject.other	Optical communication	en
dc.subject.other	Optical filters	en
dc.subject.other	Phase locked loops	en
dc.subject.other	Phase shift keying	en
dc.subject.other	Photodiodes	en
dc.subject.other	Shot noise	en
dc.subject.other	Heterodyne detection	en
dc.subject.other	Homodyne detection	en
dc.subject.other	Laser phase noise	en
dc.subject.other	Optical receivers	en
dc.subject.other	Optical systems	en
dc.title	Non-negligible loop delay time influence on coherent optical PSK systems performance degradation	en
heal.type	journalArticle	en
heal.publicationDate	2001	en
heal.abstract	The phase-locked loop propagation time is important unavoidable factor for high-speed coherent detection systems. This paper report the linewidths requirements and the power penalties taking into account the loop propagation delay, laser phase noise and shot noise of corresponding photodiodes. The coherent optical receivers with PLL, based on Costas loop or decision-driven loop are taken into consideration for both type of coherent detection (homodyne and heterodyne). The expressions for phase error variance and receiver bit-error rate are determined the most precisely to date and these expressions are used in power penalty determining. Contrary to the present papers, two sources of power penalty creating, the phase error and power splitting, are considered simultaneously, due to their mutual dependency, instead of considering them separately. The optimum loop filter timing constant that gives the minimum phase error standard deviation can be determined from proposed method. The optimum power splitting ratio to minimize the receiver error probability was used in the power penalty determining. The performance comparison between Costas loop and decision-driven loop receivers is given, too.	en
heal.journalName	Journal of Optical Communications	en
dc.identifier.volume	22	en
dc.identifier.issue	4	en
dc.identifier.spage	147	en
dc.identifier.epage	153	en