Title:
コヒーレント位相シフト・キーイング
Document Type and Number:
Japanese Patent JP2009505571
Kind Code:
A
Abstract:
A receiver for coherent detection of a PSK modulated optical carrier includes an optical detector, digital-to-analog converters, and a digital module. The optical detector is configured to mix the modulated optical carrier with two phase components of a reference optical carrier and to produce analog output signals representative of optical signals produced by said mixing. The digital-to-analog converters are connected to receive the analog output signals and to produce digital signals from the received analog output signals. The digital module is connected to receive the digital signals and to perform one of compensating the received digital signals for a conjugate phase misalignment between the mixed components, extracting phase of the received digital signals, and estimating a frequency offset between the two carriers from the received digital signals.
Inventors:
Chen, Yun-Kai
Koku, Uto-Va
Levent, Andreas, Berthold
Koku, Uto-Va
Levent, Andreas, Berthold
Application Number:
JP2008526971A
Publication Date:
February 05, 2009
Filing Date:
August 02, 2006
Export Citation:
Assignee:
Lucent Technologies, Inc.
International Classes:
H04B10/04; G02F2/00; H04B10/00; H04B10/06; H04B10/142; H04B10/152
Domestic Patent References:
| JPH09130337A | 1997-05-16 | |||
| JPH09266499A | 1997-10-07 | |||
| JPH07177188A | 1995-07-14 |
Foreign References:
| US6917031B1 | 2005-07-12 |
Attorney, Agent or Firm:
Masao Okabe
Nobuaki Kato
Okabe
Shinichi Usui
Takao Ochi
Asahi Shinmitsu
Katsumi Miyama
Nobuaki Kato
Okabe
Shinichi Usui
Takao Ochi
Asahi Shinmitsu
Katsumi Miyama