Invention Grant
- Patent Title: Error scaling in crest factor reduction
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Application No.: US16063819Application Date: 2015-12-23
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Publication No.: US10944606B2Publication Date: 2021-03-09
- Inventor: Pierre-Andre Laporte
- Applicant: Telefonaktiebolaget LM Ericsson (publ)
- Applicant Address: SE Stockholm
- Assignee: Telefonaktiebolaget LM Ericsson (publ)
- Current Assignee: Telefonaktiebolaget LM Ericsson (publ)
- Current Assignee Address: SE Stockholm
- Agency: Sage Patent Group
- International Application: PCT/IB2015/059941 WO 20151223
- International Announcement: WO2017/109552 WO 20170629
- Main IPC: H04L27/26
- IPC: H04L27/26 ; H04B1/04 ; H04B1/10 ; H04J13/00 ; H04L5/00

Abstract:
A method and system for error scaling for crest factor reduction (CFR) are disclosed. According to one aspect, a method for regulating peak to average power ratio (PAR) of an output signal of the CFR circuit is disclosed. In one embodiment, the method includes receiving an input signal at an input of the CFR circuit. The magnitude of the input signal is determined and clipped to a target level to produce an error signal by comparing the input signal magnitude to a threshold in a comparator. The error signal is filtered to produce a processed error signal. The filter provides a bandpass filter frequency response. The PAR of the output signal is regulated by scaling the processed error signal by an error scaling factor to achieve a target signal to noise ratio (SNR) for the output signal corresponding to a target error vector magnitude (EVM).
Public/Granted literature
- US20200287769A1 ERROR SCALING IN CREST FACTOR REDUCTION Public/Granted day:2020-09-10
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