发明申请
- 专利标题: NONLINEAR DISTORTION COMPENSATING RECEIVER AND NONLINEAR DISTORTION COMPENSATION METHOD
- 专利标题(中): 非线性失真补偿接收器和非线性失真补偿方法
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申请号: US13378477申请日: 2010-07-05
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公开(公告)号: US20120086504A1公开(公告)日: 2012-04-12
- 发明人: Satoshi Tsukamoto , Noriaki Saito , Yoshito Shimizu , Tadashi Morita , Katsuaki Abe
- 申请人: Satoshi Tsukamoto , Noriaki Saito , Yoshito Shimizu , Tadashi Morita , Katsuaki Abe
- 申请人地址: JP Osaka
- 专利权人: PANASONIC CORPORATION
- 当前专利权人: PANASONIC CORPORATION
- 当前专利权人地址: JP Osaka
- 优先权: JP2009-160031 20090706
- 国际申请: PCT/JP2010/004385 WO 20100705
- 主分类号: H04B1/10
- IPC分类号: H04B1/10
摘要:
Disclosed are a nonlinear distortion compensating receiver and nonlinear distortion compensation method, wherein nonlinear distortion is reduced with a simple circuit configuration. A correction (opposite characteristics) filter (104) has characteristics opposite that of the frequency characteristics of a direct sampling mixer (102) and corrects signals sampled by the direct sampling mixer (102). In the main path, a LPF (106) extracts a frequency band component of a desired signal from the corrected signal. In the replica path, a BPF (107) extracts the frequency band component of a blocker signal from the corrected signal. A cubing circuit (108) uses the frequency band component of the blocker signal to generate a replica signal for the nonlinear distortion. An adaptive filter (110) performs filter processing on the replica signal while updating the filter coefficients. A subtractor (111) subtracts the output signal of the adaptive filter (110) from the frequency band component of the extracted desired signal and outputs the subtraction result as the desired signal.