Title:
CANCELLER FOR JAMMING WAVE BY INTERFERENCE
Document Type and Number:
WIPO Patent Application WO/1999/065173
Kind Code:
A1
Abstract:
A broadcast wave repeater station of a direct repeating system in SFM of a digital broadcast wave by a BST-OFDM system or the like, wherein provided are a digital signal processing unit for generating a duplicated signal corresponding to a jamming component by a digital filter which receives, in order to remove jamming by an interference between a transmitting antenna and a receiving antenna, a signal branched from an input signal or an output signal to/from a relay broadcasting device and estimates a transfer function of a jamming transmission line by using a CP signal, a TMCC signal, an AC signal and an SP signal so as to set a tap factor, and a subtracter which outputs a jamming-component-removed signal obtained by subtracting the duplicated signal generated by the digital signal processing unit from a received signal received by the receiving antenna and containing a jamming component so that the jamming-component-removed signal output from the subtracter is supplied to the relay broadcasting device and the amplified signal is transmitted from the transmitting antenna.
Inventors:
SHIBUYA KAZUHIKO
IAI NAOHIKO
IMAMURA KOICHIRO
IAI NAOHIKO
IMAMURA KOICHIRO
Application Number:
PCT/JP1999/003105
Publication Date:
December 16, 1999
Filing Date:
June 10, 1999
Export Citation:
Assignee:
JAPAN BROADCASTING CORP (JP)
International Classes:
H04B1/10; H04B1/12; H04B1/52; H04B1/56; H04B7/15; H04B7/155; H04J11/00; H04K3/00; H04L27/26; (IPC1-7): H04J11/00
Foreign References:
| JPH02249321A | 1990-10-05 | |||
| JPH08340315A | 1996-12-24 | |||
| JPH11122156A | 1999-04-30 | |||
| JPH036132A | 1991-01-11 | |||
| US5444864A | 1995-08-22 |
Other References:
MASAYUKI TAKADA, "Chijou Digital Housou no Densou Houshiki", GIKEN KOUKAI KOUEN KENKYUU HAPPYOU YOKOUSHUU, 22 May 1998, pages 67-72.
See also references of EP 1087559A4
See also references of EP 1087559A4
Attorney, Agent or Firm:
Sugimura, Akihide (Kasumigaseki 3-chome Chiyoda-ku Tokyo, JP)
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