Methods and systems for DSP-based receivers

Details Methods and systems for DSP-based receivers Methods and systems for DSP-based receivers

2007-07-17

2007-07-17

Ho, Duc (Department: 2616)

Multiplex communications

Communication techniques for information carried in plural...

Combining or distributing information via time channels

C375S327000

Reexamination Certificate

active

10085071

ABSTRACT:
Digital signal processing based methods and systems for receiving data signals include parallel receivers, multi-channel receivers, timing recovery schemes, and, without limitation, equalization schemes. The present invention is implemented as a multi-path parallel receiver in which an analog-to-digital converter (“ADC”) and/or a digital signal processor (“DSP”) are implemented with parallel paths that operate at lower rates than the received data signal. In an embodiment, a parallel DSP-based receiver in accordance with the invention includes a separate timing recovery loop for each ADC path. In an embodiment, a parallel DSP-based receiver includes a separate automatic gain control (AGC) loop for each ADC path. In an embodiment, a parallel DSP-based receiver includes a separate offset compensation loop for each ADC path. In an embodiment the present invention is implemented as a multi-channel receiver that receives a plurality of data signals.

REFERENCES:
patent: 5166954 (1992-11-01), Grizmala et al.
patent: 5396224 (1995-03-01), Dukes et al.
patent: 5485490 (1996-01-01), Leung et al.
patent: 5550546 (1996-08-01), Noneman et al.
patent: 5554945 (1996-09-01), Lee et al.
patent: 5614855 (1997-03-01), Lee et al.
patent: 5650954 (1997-07-01), Minuhin
patent: 5703905 (1997-12-01), Langberg
patent: 5757857 (1998-05-01), Buchwald
patent: 5768268 (1998-06-01), Kline et al.
patent: 5822143 (1998-10-01), Cloke et al.
patent: 5881107 (1999-03-01), Termerinac et al.
patent: 5881108 (1999-03-01), Herzberg et al.
patent: 5945862 (1999-08-01), Donnelly et al.
patent: 5949820 (1999-09-01), Shih et al.
patent: 5966415 (1999-10-01), Bliss et al.
patent: 5996415 (1999-12-01), Stanke et al.
patent: 6002279 (1999-12-01), Evans et al.
patent: 6005445 (1999-12-01), Katakura
patent: 6009534 (1999-12-01), Chiu et al.
patent: 6038269 (2000-03-01), Raghavan
patent: 6122336 (2000-09-01), Anderson
patent: 6134268 (2000-10-01), McCoy
patent: 6329859 (2001-12-01), Wu
patent: 6359486 (2002-03-01), Chen
patent: 6359923 (2002-03-01), Agee et al.
patent: 6397048 (2002-05-01), Toda
patent: 6404525 (2002-06-01), Shimomoura et al.
patent: 6498694 (2002-12-01), Shah
patent: 6509773 (2003-01-01), Buchwald et al.
patent: 6587529 (2003-07-01), Staszewski et al.
patent: 6621862 (2003-09-01), Dabell
patent: 6721371 (2004-04-01), Barham et al.
patent: 6791388 (2004-09-01), Buchwald et al.
patent: 6894489 (2005-05-01), Makuuchi et al.
patent: 2002/0012152 (2002-01-01), Agazzi et al.
patent: 2002/0034222 (2002-03-01), Buchwald et al.
patent: 2002/0039395 (2002-04-01), Buchwald et al.
patent: 2002/0044617 (2002-04-01), Buchwald et al.
patent: 2002/0044618 (2002-04-01), Buchwald et al.
patent: 2002/0122503 (2002-09-01), Agazzi
patent: 2003/0086515 (2003-05-01), Trans et al.
patent: 2004/0212416 (2004-10-01), Buchwald et al.
patent: 0 483 439 (1992-05-01), None
patent: 0 515 074 (1992-11-01), None
patent: 0 805 447 (1997-11-01), None
patent: 0 909 035 (1999-04-01), None
patent: 1 006 697 (2000-06-01), None
patent: 1 139 619 (2001-10-01), None
patent: WO 01/29991 (2001-04-01), None
patent: WO 01/54317 (2001-07-01), None
patent: WO 01/65788 (2001-09-01), None
patent: WO 01/84702 (2001-11-01), None
patent: WO 01/84724 (2001-11-01), None
patent: WO 02/13424 (2002-02-01), None
patent: WO 02/071616 (2002-09-01), None
Agazzi, O. and Lenosky, T., “Algorithm to Postprocess Measured Data,”IEEE 802.3ae Equalization Ad Hoc Group, IEEE, Jan. 10, 2001, 11 pages.
Agazzi, O., “A Link Model for Equalized Optical Receivers,”IEEE 802.3ae Equalization Ad Hoc Group, IEEE, Mar. 11, 2001, 30 pages.
Agazzi, O. et al., “DSP-Based Equalization for Optical Channels: Feasibility of a VLSI Implementation,”IEEE 802.3ae, New Orleans, IEEE, Sep. 12-14, 2000, 39 pages.
Agazzi, O.et al., “Interim Observations on Multimode Optical Channels,”IEEE 802.3ae—Equalization Ad Hoc, IEEE, Tampa, Nov. 5, 2000, 29 pages.
Agazzi, O. et al., “Measurement of DMD-Challenged Fibers at 3.125Gb/s,”IEEE 802.3ae Equalization Ad Hoc, IEEE, Jan. 10, 2001, 33 pages.
Agazzi, O. and Lenosky, T., “Measurement of Non-Stationarity of 10 Gb/s Multimode Fiber Links,”IEEE 802.3ae Equalization Ad Hoc, IEEE, Nov. 24, 2000, 5 pages.
Agazzi, O., “10 Gb/s PMD Using PAM-5 Modulation,”IEEE 802.3, IEEE, Dallas, Jan. 18-20, 2000, 19 pages.
Agazzi, O. et al., “10 Gb/s PMD Using PAM-5 Trellis Coded Modulation,”IEEE 802.3, IEEE, Alburquerque, Mar. 6-10, 2000, 38 pages.
Bhatt, V., “Equalization Ad Hoc Concluding Report,”IEEE P802.3ae Plenary, IEEE, Mar. 2001, 12 pages.
Bingham, J.A.C., “Multicarrier Modulation for Data Transmission: An Idea Whose Time Has Come,”IEEE Communications Magazine, IEEE, vol. 28, No. 5, pp. 5-8 and 11-14.
Chiddix, J. et al., “AM Video on Fiber in CATV Systems: Need and Implementation,”IEEE Journal on Selected Areas in Communications, IEEE, vol. 8, No. 7, Sep. 1990, pp. 1229-1239.
Darcie, T., “Subcarrier Multiplexing for Lightwave Networks and Video Distribution Systems,”IEEE Journal on Selected Areas in Communications, IEEE, vol. 8, No. 7, Sep. 1990, pp. 1240-1248.
Fettweis, G., “High-Rate Viterbi Processor: A Systolic Array Solution,”IEEE Journal on Selected Areas in Communications, IEEE, vol. 8, No. 8, Oct. 1990, pp. 1520-1534.
Fettweis, G., “Parallel Viterbi Algorithm Implementation: Breaking the ACS-Bottleneck,”IEEE Transactions on Communications, IEEE, vol. 37, No. 8, Aug. 1989, pp. 785-790.
Fornev, Jr., G.D., “The Viterbi Algorithm,”Proceedings of the IEEE, IEEE, vol. 61, No. 3, Mar. 1973, pp. 268-278.
Frazier, H., “IEEE 802.3 Higher Speed Study Group,”10 Gig MII update, IEEE, Kauai, Hawaii, Nov. 9, 1999, 24 pages.
Giaretta, G. and Lenosky, T., “Adaptive Equalization of DMD Challenged Multimode Fiber at 1300 mm,”IEEE P802.3ae Plenary, IEEE, Mar. 11, 2001, 10 pages.
Hatamian, M. et al., “Design Considerations for Gigabit Ethernet 1000Base-T Twisted Pair Transceivers,”IEEE 1998 Custom Integrated Circuits Conference, IEEE, 1998, pp. 335-342.
Isaacs, M et al., “Measurements of Fiber Responses at 5 Gb/s Data Rate Using 850nm VCSELs,”IEEE 802.3ae Equalization Ad Hoc, IEEE, Mar. 11, 2001, 18 pages.
Kanno, N. and Ito, K., “Fiber-Optic Subcarrier Multiplexing Video Transport Employing Multilevel QAM,”IEEE Journal on Selected Areas in Communications, IEEE, vol. 8, No. 7, Sep. 1990, pp. 1313-1319.
Kasper, B.L., “Equalization of Multimode Optical Fiber Systems,”The Bell System Technical Journal, American Telephone and Telegraph Company, IEEE, vol. 61, No. 7, Sep. 1982, pp. 1367-1388.
Kasturia, S. and Winters, J., “Techniques for High-Speed Implementation of Nonlinear Cancellation,”IEEE Journal on Selected Areas in Communications, IEEE, vol . 9, No. 5, Jun. 1991, pp. 711-717.
Lenosky, T., “A Unified Method of Calculating PMD-induced Pulse Broadening,”IEEE 802.3ae Equalization Ad Hoc Meeting, IEEE, Tampa, Florida, Nov. 5, 2000, 8 pages.
Lenosky, T. and Giaretta, G., “Five Gb/s Multimode DMD at 850 nm: Real-Time Data and Equalizer Simulations,”Finisar Corporation, Mar. 11, 2001, 13 pages.
Lenosky, T. et al., “Measurements of DMD-Challenged Fibers at 850nm and 2Gb/s Data Rate,”IEEE 802.3ae—Equalization Ad Hoc Group, IEEE, Jan. 10. 2001, 21 pages.
Lenosky, T. et al., “Measurement of DMD-Challenged Fibers at 1310nm and 1Gb/s Data Rate,”IEEE 802.3ae—Equalization Ad Hoc Group, IEEE, Jan. 10. 2001, 21 pages.
Liu, M-K. and Modestou, P., “Multilevel Signaling and Pulse Shaping for Spectrum Efficiency in Subcarrier Multiplexing Transmission,”IEEE Journal of Lightwave Technology, IEEE, vol. 12, No. 7, pp. 1239-1246.
Olshansky, R. et al., “Subcarrier Multiplexed Coherent Lightwave Systems for Video Distribution,”IEEE Journal on Selected Areas in Communications, I

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