公开(公告)号：DE602004006946D1

公开(公告)日：2007-07-26

申请号：DE602004006946

申请日：2004-11-22

Applicant: LUCENT TECHNOLOGIES INC

Inventor： LIU XIANG ,  MOELLER LOTHAR B E J ,  WEI XING ,  XIE CHONGJIN

IPC: H04L25/49 ,  H04L25/497 ,  H03M5/18 ,  H04B10/04 ,  H04B10/06 ,  H04B10/14 ,  H04B10/142 ,  H04B10/152 ,  H04B10/155 ,  H04B10/158 ,  H04B10/26 ,  H04B10/43 ,  H04L7/04 ,  H04L25/06

Abstract: An optical receiver adapted to process an optical duobinary signal received over a transmission link in an optical communication system. In one embodiment, the receiver has an optical-to-electrical signal converter coupled to a decoder. The decoder processes an electrical signal generated by the converter to generate a bit sequence corresponding to the optical signal. To generate a bit value, the decoder integrates the electrical signal using a sampling window and compares the integration result with a decision threshold value. In one configuration, the width of the sampling window and the decision threshold value are selected based on the eye diagram and noise distribution function, respectively, corresponding to the optical signal. Advantageously, embodiments of the present invention improve overall back-to-back (i.e., source-to-destination) system performance, e.g., by improving dispersion tolerance and/or reducing optical power corresponding to a selected bit error rate value.

公开(公告)号：DE602005000304D1

公开(公告)日：2007-01-18

申请号：DE602005000304

申请日：2005-02-08

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MOELLER LOTHAR B E J ,  XIE CHONGIN

IPC: H04B10/04 ,  H04B10/158 ,  H04B10/00 ,  H04B10/06 ,  H04B10/142 ,  H04B10/152 ,  H04L25/497

Abstract: An optical receiver adapted to apply multiple-sampling processing to an optical duobinary signal received over a transmission link in an optical communication system. In one embodiment, the receiver has an optical-to-electrical signal converter coupled to a decoder adapted to process an electrical signal generated by the converter to generate a bit sequence corresponding to the optical signal. To generate a bit value, the decoder first obtains two or more bit estimate values by sampling the electrical signal within a corresponding signaling interval two or more times. The decoder then applies a logical function to the bit estimate values, which produces the corresponding bit value for the bit sequence. Advantageously, embodiments of the present invention improve overall back-to-back (i.e., source-to-destination) system performance, e.g., by reducing the number of decoding errors associated with timing jitter and/or spontaneous beat noise in the received optical signal.

公开(公告)号：DE602004006946T2

公开(公告)日：2008-02-14

申请号：DE602004006946

申请日：2004-11-22

Applicant: LUCENT TECHNOLOGIES INC

Inventor： LIU XIANG ,  MOELLER LOTHAR B E J ,  WEI XING ,  XIE CHONGJIN

IPC: H04L25/49 ,  H04L25/497 ,  H03M5/18 ,  H04B10/04 ,  H04B10/06 ,  H04B10/14 ,  H04B10/142 ,  H04B10/152 ,  H04B10/155 ,  H04B10/158 ,  H04B10/26 ,  H04B10/43 ,  H04L7/04 ,  H04L25/06

Abstract: An optical receiver adapted to process an optical duobinary signal received over a transmission link in an optical communication system. In one embodiment, the receiver has an optical-to-electrical signal converter coupled to a decoder. The decoder processes an electrical signal generated by the converter to generate a bit sequence corresponding to the optical signal. To generate a bit value, the decoder integrates the electrical signal using a sampling window and compares the integration result with a decision threshold value. In one configuration, the width of the sampling window and the decision threshold value are selected based on the eye diagram and noise distribution function, respectively, corresponding to the optical signal. Advantageously, embodiments of the present invention improve overall back-to-back (i.e., source-to-destination) system performance, e.g., by improving dispersion tolerance and/or reducing optical power corresponding to a selected bit error rate value.

公开(公告)号：DE602005000304T2

公开(公告)日：2007-05-31

申请号：DE602005000304

申请日：2005-02-08

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MOELLER LOTHAR B E J ,  XIE CHONGIN

IPC: H04B10/04 ,  H04B10/158 ,  H04B10/00 ,  H04B10/06 ,  H04B10/142 ,  H04B10/152 ,  H04L25/497

Abstract: An optical receiver adapted to apply multiple-sampling processing to an optical duobinary signal received over a transmission link in an optical communication system. In one embodiment, the receiver has an optical-to-electrical signal converter coupled to a decoder adapted to process an electrical signal generated by the converter to generate a bit sequence corresponding to the optical signal. To generate a bit value, the decoder first obtains two or more bit estimate values by sampling the electrical signal within a corresponding signaling interval two or more times. The decoder then applies a logical function to the bit estimate values, which produces the corresponding bit value for the bit sequence. Advantageously, embodiments of the present invention improve overall back-to-back (i.e., source-to-destination) system performance, e.g., by reducing the number of decoding errors associated with timing jitter and/or spontaneous beat noise in the received optical signal.