Title:
交差偏波間補償装置
Document Type and Number:
Japanese Patent JP3566788
Kind Code:
B2
Abstract:
A method and apparatus for inter-cross wave compensation. There are provided a frequency conversion unit for performing frequency conversion for one of two received polarized wave signals, an analog/digital converter for converting the one of the polarized wave signals into a digital signal, a digital orthogonal detection unit for obtaining two orthogonal detection signals, and a digital equalizing unit for performing an equalizing process for outputs of the orthogonal detection unit. Further provided are a digital inter-cross wave compensating unit for receiving the other of the two received polarized wave signals as a digital signal and for outputting a signal used for compensating the output of the equalizing unit, and an adding unit for adding the output of the equalizing unit and the output of the digital inter-cross wave compensating unit. This structure allows a digital demodulation method to be applied to the inter-cross wave compensation, thereby making it possible to form the inter-cross wave compensating apparatus as an LSI and reducing the size and cost of the apparatus. In addition, inter-cross wave compensation can be easily performed even for polarized wave signals which are transmitted without synchronization during modulation for transmission.
Inventors:
Takanori Iwamatsu
Application Number:
JP19783095A
Publication Date:
September 15, 2004
Filing Date:
August 02, 1995
Export Citation:
Assignee:
富士通株式会社
International Classes:
H03D7/16; H04B1/12; H04B7/005; H04B7/10; H04J11/00; H04L27/38; H03H21/00; (IPC1-7): H04B7/10; H03H21/00; H04B7/005; H04J11/00; H04L27/38
Domestic Patent References:
| JP2084835A | ||||
| JP2079632A | ||||
| JP4192605A | ||||
| JP5260014A | ||||
| JP3165646A | ||||
| JP1291540A | ||||
| JP7177123A |
Attorney, Agent or Firm:
Yu Sanada