- 专利标题: Spread-spectrum signal receiver
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申请号: US09769884申请日: 2001-01-25
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公开(公告)号: US07123645B2公开(公告)日: 2006-10-17
- 发明人: Eizou Ishizu , Tadashi Nakamura
- 申请人: Eizou Ishizu , Tadashi Nakamura
- 申请人地址: JP Kawasaki
- 专利权人: Fujitsu Limited
- 当前专利权人: Fujitsu Limited
- 当前专利权人地址: JP Kawasaki
- 代理机构: Katten Muchin Rosenman LLP
- 优先权: JP2000-238052 20000807
- 主分类号: H04K1/00
- IPC分类号: H04K1/00
摘要:
A CDMA receiver is disclosed wherein (1) a despreader despreads a receive signal to thereby demodulate a control-data signal and a transmit-data signal; (2) a channel estimation unit derives a channel estimation value from a pilot signal that is contained in the despread control-data signal; (3) a channel compensation unit performs channel compensation of the transmit-data and control-data signals based upon the channel estimation value; (4) a power calculation unit calculates power of the transmit-data signal and power of the control-data signal after the channel compensation thereof and calculates a power ratio representing the ratio of the calculated power of the transmit-data signal to the calculated power of the control-data signal; (5) a signal-level changing unit raises, on the basis of the power ratio, the level of whichever of the signals has the lower power; and (6) a decoder executes decoding processing based upon the signal the level of which has been changed by the signal-level changing unit.
公开/授权文献
- US20020015438A1 Spread-spectrum signal receiver 公开/授权日:2002-02-07
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