Title:
BROADCAST BASE STATION DEVICE, PORTABLE TERMINAL, HIERARCHICAL MODULATION METHOD SETTING METHOD, BROADCAST SYSTEM, AND HIERARCHICAL MODULATION METHOD SETTING PROGRAM
Document Type and Number:
WIPO Patent Application WO/2007/029745
Kind Code:
A1
Abstract:
A broadcast base station device (1) transmits a broadcast wave modulated by the hierarchical
modulation method to a portable terminal (2). A hierarchical modulation setting
section (17) compares the reception quality of the broadcast wave at the portable
terminal (2) with a predetermined reference quality. According to the comparison
result, the hierarchical modulation setting section (17) sets the hierarchical
modulation method. For example, the constellation in each quadrant is narrowed
or broadened. With this, the broadcast base station device (1) can transmits
a most suitable broadcast wave corresponding to the actual reception quality
to portable terminals (2).
Inventors:
KASHIWAGI HIROKI
Application Number:
PCT/JP2006/317665
Publication Date:
March 15, 2007
Filing Date:
September 06, 2006
Export Citation:
Assignee:
SHARP KK (JP)
KASHIWAGI HIROKI
KASHIWAGI HIROKI
International Classes:
H04H20/00; H04B7/26; H04L27/00
Domestic Patent References:
| WO2004042988A1 | 2004-05-21 |
Foreign References:
| JP2002199428A | 2002-07-12 | |||
| JP2000341204A | 2000-12-08 | |||
| JP2002084329A | 2002-03-22 | |||
| JP2004040661A | 2004-02-05 |
Other References:
"Enhanced HARQ Method with Signal Constellation Rearrangement", 3GPP TSG-RAN WORKING GROUP 1 MEETING #19, 27 February 2001 (2001-02-27), Retrieved from the Internet
Attorney, Agent or Firm:
HARAKENZO WORLD PATENT & TRADEMARK (2-6 Tenjinbashi 2-chome Kita, Kita-k, Osaka-shi Osaka 41, JP)
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