Telecommunications – Receiver or analog modulated signal frequency converter – With wave collector
Reexamination Certificate
2007-02-27
2007-02-27
Nguyen, Duc M. (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
With wave collector
C455S275000, C455S276100, C455S063400, C455S296000, C455S065000, C375S316000, C375S346000, C375S349000, C375S226000
Reexamination Certificate
active
10714119
ABSTRACT:
A radio communication apparatus using an array antenna has a plurality of reception branches for conveying reception signals received at the antenna element of the array antenna, and a calibration branch for selecting one of the plurality of reception branches and conveying the reception signal. Channel estimations are made respectively on the reception-branch signals and a calibration-branch signal. RAKE composition is made on the channel estimation values, a result of which is used to detect amplitude and phase deviations on the reception branch thereby carrying out a correction.
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Takakusaki, Keiji, et al., “Background Calibration Method for Array Antenna and its Performance,” Technical Report of IEICE, SST2001-78, A P 2001-226, RCS2001-261 (2002-03), pp. 113-118 (w/ partial English Abstract and partial English Translation).
Fukagawa Takashi
Kishigami Takaaki
Miyamoto Shoji
Takakusaki Keiji
Yuda Yasuaki
Matsushita Electric - Industrial Co., Ltd.
Nguyen Duc M.
RatnerPrestia
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