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    Multiple synchronous data stream format for an optical data link
    1.
    发明专利
    Multiple synchronous data stream format for an optical data link 未知

    公开(公告)号：GB2339653B

    公开(公告)日：2003-06-04

    申请号：GB9815136

    申请日：1998-07-14

    Applicant: IBM

    Inventor： CRUMMEY THOMAS ,  FERGUSSON RICHARD JOHN ,  KERIGAN SHAUN ,  LANE PHILIP

    IPC: H04L12/54 ,  H04L12/70 ,  H04J3/22 ,  H04L12/64

    Abstract: An isochronous output data stream format in which a single n bit word is transmitted as m multiple synchronous data streams where the length of the word transmitted in each data stream is n/m, the output data stream containing multiple isochronous different data rate data streams and one or more asynchronous data stream or streams. One bit from each of the m multiple synchronous data streams are combined and transmitted as a single signal at one of 2 analog levels. Data which is it desired to have a lower error rate than other data is transmitted in the synchronous data stream corresponding to the most significant bit associated with the 2 analog levels. Calibration data is transmitted in the synchronous data stream corresponding to the most significant bit associated with the 2 analog levels, the calibration data also being transmitted distributed over each of the m synchronous data streams.

    Multi-level optical amplitude modulator
    3.
    发明专利
    Multi-level optical amplitude modulator 未知

    公开(公告)号：GB2366677A

    公开(公告)日：2002-03-13

    申请号：GB0022130

    申请日：2000-09-09

    Applicant: IBM

    Inventor： FERGUSSON RICHARD JOHN

    IPC: H04B10/54 ,  H04B10/155 ,  H04L27/20

    Abstract: An optical amplitude modulator for modulating signals for transmission by a fibre optic link. The modulator comprises of a plurality of optical transmitters, whereby each transmitter is driven by an electronic circuit. Generally, each optical transmitter provides a light output, and the light outputs of the plurality of optical transmitters are combined optically for transmission as an optical output signal. Additionally, each of the plurality of optical transmitters has an associated optical filter, whereby each filter has a different level of opaqueness. Each filter, filters light output from the associated optical transmitter. In a way a multi-level optical output is achieved.

    Optical amplitude modulator
    5.
    发明专利
    Optical amplitude modulator 未知

    公开(公告)号：GB2366677B

    公开(公告)日：2004-05-19

    申请号：GB0022130

    申请日：2000-09-09

    Applicant: IBM

    Inventor： FERGUSSON RICHARD JOHN

    IPC: H04B10/54 ,  H04B10/155 ,  H04L27/20

    Abstract: An optical amplitude modulator for modulating signals for transmission by a fibre optic link. The modulator comprises of a plurality of optical transmitters, whereby each transmitter is driven by an electronic circuit. Generally, each optical transmitter provides a light output, and the light outputs of the plurality of optical transmitters are combined optically for transmission as an optical output signal. Additionally, each of the plurality of optical transmitters has an associated optical filter, whereby each filter has a different level of opaqueness. Each filter, filters light output from the associated optical transmitter.

    Multi-level optical amplitude demodualtor
    8.
    发明专利
    Multi-level optical amplitude demodualtor 未知

    公开(公告)号：GB2366678A

    公开(公告)日：2002-03-13

    申请号：GB0022133

    申请日：2000-09-09

    Applicant: IBM

    Inventor： FERGUSSON RICHARD JOHN ,  CRUMMEY TOM

    IPC: H04B10/69 ,  H04L25/06 ,  H04L25/26 ,  H04B10/158 ,  H04L27/22

    Abstract: An optical amplitude demodulator for demodulating signals received from a fibre optic link. The demodulator comprises a plurality of optical sensors for detecting optical output from the fibre optic link, whereby each of the optical sensors has a different detection threshold. Generally, the plurality of optical sensors produce a plurality of digital outputs corresponding to the optical output level detected. A priority encoder encodes the digital outputs into a multi-bit digital signal. Additionally, each of the plurality of optical sensors has an associated optical filter, whereby each of the filters has a different level of opaqueness. Each filter filters received optical output prior to detection by the associated optical sensor. For use with multi-level optical signals.

    Multiple synchronous data stream format for an optical data link
    9.
    发明专利
    Multiple synchronous data stream format for an optical data link 未知

    公开(公告)号：GB2339653A

    公开(公告)日：2000-02-02

    申请号：GB9815136

    申请日：1998-07-14

    Applicant: IBM

    Inventor： CRUMMEY THOMAS ,  FERGUSSON RICHARD JOHN ,  KERIGAN SHAUN ,  LANE PHILIP

    IPC: H04L12/54 ,  H04L12/70 ,  H04J3/22 ,  H04L12/64

    Abstract: An isochronous output data stream format in which a single n bit word is transmitted as m multiple synchronous data streams where the length of the word transmitted in each data stream is n/m, the output data stream containing multiple isochronous different data rate data streams and one or more asynchronous data stream or streams. One bit from each of the m multiple synchronous data streams are combined and transmitted as a single signal at one of 2 analog levels. Data which is it desired to have a lower error rate than other data is transmitted in the synchronous data stream corresponding to the most significant bit associated with the 2 analog levels. Calibration data is transmitted in the synchronous data stream corresponding to the most significant bit associated with the 2 analog levels, the calibration data also being transmitted distributed over each of the m synchronous data streams.

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