发明名称 |
PRE-DISTORTION OF NON-LINEAR DEVICES BY POST-DETECTION |
摘要 |
A method and an arrangement is disclosed for linearizing the output signal from an inherently non-linear device, e.g. an amplifier, producing intermodulation or non-linear products. A pre-distorter having a unity transfer function is located between a signal input and the input of the inherently non-linear device. Furthermore a second device forming a post-distorter is coupled to the output of the nonlinear device in a way to be able to handle the amplified output signal or a portion of the output signal. According to the present method the post-distorter is optimized to give as output the same signal spectrum content as what is input to the non-linear device, whereafter the achieved parameters of the post-distorter are transferred to the pre-distorter. In other words a copy of the optimized post-distorter is then used as a pre-distorter in front of the non-linear device to obtain an improved output signal in terms of signal quality from the inherently non-linear device. The post-distorter is then optimized once more and parameters are again transferred to the pre-distorter as a further as a further small correction. In operation this is then generally repeated in a suitable scheduled way to give an ongoing correction to the pre-distortion. The pre-distorter and post-distorter may both be either digital devices or analog devices.
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申请公布号 |
WO0249207(A1) |
申请公布日期 |
2002.06.20 |
申请号 |
WO2001SE02628 |
申请日期 |
2001.11.28 |
申请人 |
TELEFONAKTIEBOLAGET LM ERICSSON;NYGREN, THORSTEN;REXBERG, LEONARD;JOHANSSON, BERNT |
发明人 |
NYGREN, THORSTEN;REXBERG, LEONARD;JOHANSSON, BERNT |
分类号 |
H03F1/32;(IPC1-7):H03F1/32 |
主分类号 |
H03F1/32 |
代理机构 |
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主权项 |
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地址 |
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