发明授权
US08175136B2 Noise cancellation method, receiver circuit, and electronic instrument
有权
噪声消除方法,接收机电路和电子仪器
- 专利标题: Noise cancellation method, receiver circuit, and electronic instrument
- 专利标题(中): 噪声消除方法,接收机电路和电子仪器
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申请号: US12171655申请日: 2008-07-11
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公开(公告)号: US08175136B2公开(公告)日: 2012-05-08
- 发明人: Kazumi Matsumoto
- 申请人: Kazumi Matsumoto
- 申请人地址: JP Tokyo
- 专利权人: Seiko Epson Corporation
- 当前专利权人: Seiko Epson Corporation
- 当前专利权人地址: JP Tokyo
- 代理机构: Global IP Counselors, LLP
- 优先权: JP2007-186581 20070718
- 主分类号: H04B1/707
- IPC分类号: H04B1/707 ; H04B1/04 ; H04B1/10 ; H04L25/08
摘要:
A noise cancellation method includes: inputting an interference wave signal detected near a receiver section, and changing the phase and the amplitude of the input signal to generate a cancellation signal that cancels the input signal; performing correlation calculations on a signal obtained by adding the cancellation signal to a communication signal received by the receiver section and a code replica of a PRN code used for the communication signal, within a given correlation calculation target range that is included within a code phase range and a frequency range; and performing the correlation calculations within a non-signal range outside the correlation calculation target range, and controlling a phase shift amount and an amplitude change rate of the input signal based on the correlation calculation result.
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