COMMUNICATION DEVICE, MODULATION PARAMETER DETERMINING DEVICE, COMMUNICATION SYSTEM AND COMMUNICATION METHOD

Title:

COMMUNICATION DEVICE, MODULATION PARAMETER DETERMINING DEVICE, COMMUNICATION SYSTEM AND COMMUNICATION METHOD

Document Type and Number:

WIPO Patent Application WO/2008/032580

Kind Code:

A1

Abstract:

[PROBLEMS] To provide a technology of reducing deterioration of transmission quality compared with conventional methods even under the environment where a propagation channel fluctuates and selecting suitable transmission rate, especially a technology of selecting a suitable transmission rate by taking into account reception quality change with time and a reception quality. [MEANS FOR SOLVING PROBLEMS] The communication device performs communication by using a plurality of channels. The communication device is provided with a modulation parameter determining section for selecting (S13) a modulation parameter that corresponds to reception quality information (SNR) of each channel by using associating relation corrected information. The associating relation corrected information is provided by determining a correction range (S13), based on a reception quality reference value (for instance, average SNR information obtained by averaging the SNR of the channels) (S11) and a reception quality fluctuation rate (S12) indicating reception quality fluctuation with time, and by correcting associating relation information that associates the SNR with the modulation parameter by using the determined correction range (S14).

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Inventors:

NOGAMI TOSHIZO
ONODERA TAKASHI

Application Number:

PCT/JP2007/066858

Publication Date:

March 20, 2008

Filing Date:

August 30, 2007

Export Citation:

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Assignee:

SHARP KK (JP)
NOGAMI TOSHIZO
ONODERA TAKASHI

International Classes:

H04B7/26; H04J11/00

Domestic Patent References:

WO2005013525A1	2005-02-10
WO2006075547A1	2006-07-20

Foreign References:

JP2003259437A	2003-09-12
JP2003198426A	2003-07-11
JP2007150862A	2007-06-14

Attorney, Agent or Firm:

FUKUCHI, Takeo (Shibuya-ku Tokyo, 31, JP)

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