Reception quality measuring apparatus and reception quality...

Pulse or digital communications – Testing – Signal noise

Reexamination Certificate

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Details

C375S346000, C375S350000, C375S229000, C455S063100, C455S226300, C455S296000

Reexamination Certificate

active

07949040

ABSTRACT:
A reception quality measuring apparatus of the present invention comprises a first sub-carrier averaging unit for averaging and outputting a channel gain after equalization estimated on the basis of the pilot signal over a sub-carrier, a first power calculation unit for calculating the power of a signal output from the first sub-carrier averaging unit and outputting the same as signal power, a pilot replica generator for generating and outputting a pilot signal replica with respect to a zero-timing signal component based on the zero-timing signal component when a signal x(n) in the time domain after equalization corresponding to the equalized signal is n=0, and also based on a previously set pilot code characteristic, a subtractor for subtracting the pilot signal replica output from the pilot replica generator from the equalized signal and outputting the result as an interference signal, a second power calculation unit for calculating and outputting the power of the interference signal output from the subtractor, a second sub-carrier averaging unit for averaging the power output from the second power calculation unit over the sub-carrier and outputting the result as interference power, and a divider for dividing the signal power output from the first power calculation unit by the interference power output from the second sub-carrier averaging unit to calculate a reception quality after equalization.

REFERENCES:
patent: 2005/0135460 (2005-06-01), Akita
patent: 2005/0141598 (2005-06-01), Akita
patent: 2006/0262869 (2006-11-01), Yoshida
patent: 2008/0144708 (2008-06-01), Tsuie et al.
patent: 2 431 825 (2007-05-01), None
patent: 9-219697 (1997-08-01), None
patent: 2002-368650 (2002-12-01), None
patent: 2004-180154 (2004-06-01), None
patent: 2005-57673 (2005-03-01), None
patent: 2005-102271 (2005-04-01), None
patent: 2006-164487 (2006-06-01), None
patent: 2006-287754 (2006-10-01), None
patent: WO 02/28122 (2002-04-01), None
patent: WO 03/041300 (2003-05-01), None
patent: WO 2004/047348 (2004-06-01), None
patent: 2005/064807 (2005-07-01), None
British Search Report dated Sep. 29, 2008.

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