Title:
OFDM SIGNAL TRANSMISSION DEVICE AND OFDM SIGNAL PEAK POWER SUPPRESSION METHOD
Document Type and Number:
WIPO Patent Application WO/2006/049136
Kind Code:
A1
Abstract:
There is provided an OFDM signal transmission device capable of reducing the cost of a transmission power amplifier without requiring linearity of the transmission power amplifier of a significantly high characteristic. In this device, a power comparison unit (117) compares the OFDM symbol power detection value to a reference value to determine whether it is smaller than the reference value and generates a power comparison result. When the power comparison result indicates that the OFDM symbol power detection value is smaller than the reference value, a mapping control unit (118) causes a sub-carrier mapping unit (111) to continue mapping of the current digital data to the aforementioned sub-carrier. On the contrary, when the power comparison result indicates that the OFDM symbol power detection value is not smaller than the reference value, the mapping control unit (118) causes the sub-carrier mapping unit (111) to stop mapping of the current digital data to the aforementioned sub-carrier and allocate the current digital data to be allocated and the digital data after this allocation to the next OFDM symbol sub-carrier.
Inventors:
TOHGOH HITOMARO
Application Number:
PCT/JP2005/020023
Publication Date:
May 11, 2006
Filing Date:
October 31, 2005
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
TOHGOH HITOMARO
TOHGOH HITOMARO
International Classes:
H04J11/00
Foreign References:
| JP2003283460A | 2003-10-03 | |||
| JP2001339361A | 2001-12-07 | |||
| JP2002044052A | 2002-02-08 | |||
| JP2004129249A | 2004-04-22 | |||
| JPH1174862A | 1999-03-16 |
Other References:
MATSUMOTO Y. ET AL: "A Novel Peak Power Reduction Technique for Broadband Microceller OFDM Systems", IEICE TECHNICL REPORT, vol. 97, no. 323, 17 October 1997 (1997-10-17), pages 103 - 110, XP002995257
Attorney, Agent or Firm:
Washida, Kimihito (Shintoshicenter Bldg. 24-1, Tsurumaki 1-chom, Tama-shi Tokyo 34, JP)
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