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1. (WO2005038493) OPTICAL SIGNAL EQUALIZER WITH ADJUSTABLE LINEAR FILTER
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2005/038493 International Application No.: PCT/US2004/033162
Publication Date: 28.04.2005 International Filing Date: 07.10.2004
IPC:
H04B 1/10 (2006.01)
Applicants: LENOSKY, Thomas[US/US]; US (UsOnly)
FINISAR CORPORATION[US/US]; 1308 Moffet Park Drive Sunnyvale, CA 94089-1133, US (AllExceptUS)
Inventors: LENOSKY, Thomas; US
Agent: ISRAELSEN, Burns, R.; Workman Nydegger 1000 Eagle Gate Tower 60 East South Temple Salt Lake City, UT 84111, US
Priority Data:
10/684,12210.10.2003US
Title (EN) OPTICAL SIGNAL EQUALIZER WITH ADJUSTABLE LINEAR FILTER
(FR) EGALISEUR DE FIBRE OPTIQUE COMPRENANT UN FILTRE LINEAIRE REGLABLE
Abstract: front page image
(EN) Mitigating errors caused by the dispersion of optical or electrical signals. Errors caused by dispersion in high frequency system are mitigated by passing a received signal through an adjustable linear filter that counteracts a channel response of a channel on which the received signal has traveled to produce an electrical signal. The adjustable linear filter has a number of coefficients. A figure of merit is calculated for the electrical signal, where the figure of merit includes the second and fourth moments of the electrical signal. The coefficients of the linear filter are adjusted based on the value of the figure of merit so as to minimize the figure of merit.
(FR) La présente invention permet de limiter les erreurs causées par la dispersion des signaux optiques ou électriques. L'invention réduit les erreurs causées par la dispersion dans un système à haute fréquence en faisant passer un signal reçu à travers un filtre linéaire réglable qui neutralise une réponse de canal d'un canal sur lequel le signal reçu a voyagé afin de produire un signal électrique. Le filtre linéaire réglable possède un nombre de coefficients. On calcule un facteur de qualité du signal électrique, le facteur de qualité comprenant le second et le quatrième moment du signal électrique. On règle les coefficients du filtre linéaire en fonction de la valeur du facteur de qualité afin de minimiser ce dernier.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, YU, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (EPO) (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IT, LU, MC, NL, PL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)