发明授权
- 专利标题： Method, base station and apparatus in a base station for reducing intermodulation distortion
- 专利标题（中）： 基站中的方法，基站和装置，用于减少互调失真
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申请号： US14399222申请日： 2012-05-24
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公开(公告)号： US09374115B2公开(公告)日： 2016-06-21
- 发明人: Youping Su , Alireza Nejatian , Fredrik Huss
- 申请人： Youping Su , Alireza Nejatian , Fredrik Huss
- 申请人地址： SE Stockholm
- 专利权人： Telefonaktiebolaget LM Ericsson (publ)
- 当前专利权人： Telefonaktiebolaget LM Ericsson (publ)
- 当前专利权人地址： SE Stockholm
- 代理机构： Baker Botts, LLP
- 国际申请： PCT/SE2012/050560 WO 20120524
- 国际公布： WO2013/176590 WO 20131128
- 主分类号： H04B15/00
- IPC分类号： H04B15/00 ; H04B1/10 ; H04B1/525
摘要：
A method in a base station is provided for reducing distortion of an uplink signal received in a receiver part (20) of the base station, said distortion being caused by intermodulation, IM, products. The method comprises: generating (106), from a transmitter source signal, a modeled signal of IM components, as nth order IM components of the transmitter source signal, n being an integer value of 2, 3, 4 and/or 5 etc., and detecting (110) IM products of the received uplink signal, the received uplink signal comprising UL traffic components and the IM products, by correlating the received uplink signal with the IM components of the modeled signal. The method further comprises producing (112) a cancellation signal based on the detected IM products of the received uplink signal, and subtracting (114) the cancellation signal from the received uplink signal. Also, a similar apparatus in a base station is provided.
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