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1. 发明专利

JP5387126B2 Offset compensation circuit and offset compensation method 有权
公开(公告)号：JP5387126B2
公开(公告)日：2014-01-15
申请号：JP2009120483
申请日：2009-05-19
申请人：ミツミ電機株式会社
发明人：祐司木村 , 康之介山元
IPC分类号： H04J11/00
CPC分类号： H04L27/2657 , H04L25/0296
摘要： An offset compensating circuit comprises: a DC offset estimating/compensating means that estimates the value of a DC offset included in an OFDM signal to compensate the DC offset; a frequency offset estimating/compensating means that estimates the value of a frequency offset included in the DC-offset compensated signal to compensate the frequency offset; an excessively compensated component calculating means that uses both the DC offset value estimated by the DC offset estimating/compensating means after the compensation by the frequency offset estimating/compensating means and the frequency offset value estimated by the frequency offset estimating/compensating means to calculate a component of a subcarrier excessively compensated in the DC offset compensating means; and an excessively compensated component removing means that removes, from the DC offset value estimated by the DC offset estimating/compensating means, the excessively compensated component calculated by the excessively compensated component calculating means to use the resultant in the DC offset compensation by the DC offset estimating/compensating means. Thus, the offset compensating circuit compensates the frequency offset of the signal as DC-offset compensated after the removal of the excessively compensated component and outputs the resultant.

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