发明授权
- 专利标题： Frequency converter and wireless repeater using the same, and wireless repeating system using the same
- 专利标题（中）： 变频器和无线中继器使用相同，无线重复系统使用相同
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申请号： US13324113申请日： 2011-12-13
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公开(公告)号： US08964817B2公开(公告)日： 2015-02-24
- 发明人: Ken Takei
- 申请人： Ken Takei
- 申请人地址： JP Tokyo
- 专利权人： Hitachi Metals, Ltd.
- 当前专利权人： Hitachi Metals, Ltd.
- 当前专利权人地址： JP Tokyo
- 代理机构： Crowell & Moring LLP
- 优先权： JP2010-277895 20101214
- 主分类号： H04L25/52
- IPC分类号： H04L25/52 ; G06T1/00 ; G06T3/40 ; H04B7/155
摘要：
According to a wireless repeating system of the invention, a first analog signal is digitally converted at a first sampling frequency, a converted original digital signal is oversampled at a second sampling frequency higher than the first sampling frequency, an image digital signal occupying a specific frequency band out of plural image digital signals generated by zero-interpolation is extracted via a digital filter, and the image digital signal is input to a delta-sigma demodulator to convert to a second analog signal and output the second analog signal.
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