Communication terminal device and channel estimating method
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United States of America Patent
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-
Feb 21, 2006
Grant Date -
N/A
app pub date -
Aug 23, 2000
filing date -
Aug 27, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A phase rotation amount estimating unit (210) rotates a channel estimation value of a signal in a common pilot channel (B) through a candidate phase rotation amount θ (θ=0, 180) for synthesizing with a channel estimation value of a signal in a common pilot channel (A). A phase rotation is estimated based on the highest one of orthogonalities between this synthesis result and channel estimation values of signals in individual channels. A channel estimation value synthesis unit (211) synthesizes a value obtained by rotating a channel estimation value of a signal in the common pilot channel (B) through a phase rotation amount θ with a channel estimation value of a signal in the common pilot channel (A), whereby the reliability of a channel estimation value can be enhanced in a transmission diversity-introduced radio communication system.
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