Method and apparatus for reducing peak to average power ratio using peak windowing

A method and apparatus for reducing a Peak to Average Power Ratio (PAPR) using peak windowing is provided. In the apparatus, an absolute value calculator (1104) calculates an absolute value of an input signal, a subtractor (1106) subtracts a predetermined clipping threshold level from the absolute v...

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Bibliographic Details
Main Authors KIM, SHIN-HO, LIM, JONG-HAN, BAE, SANG-MIN, LEE, BO-RHAM, KIM, DONG-MIN, KANG, IN-TAE, WOO, JUNG-UK, BAE, JUNG-HWA
Format Patent
LanguageEnglish
French
German
Published 27.07.2011
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Summary:A method and apparatus for reducing a Peak to Average Power Ratio (PAPR) using peak windowing is provided. In the apparatus, an absolute value calculator (1104) calculates an absolute value of an input signal, a subtractor (1106) subtracts a predetermined clipping threshold level from the absolute value, a smoothing unit (1108) performs smoothing on the subtracted signal according to a predetermined smoothing scheme and outputs a first smoothed signal, an adder (1110) adds the first smoothed signal to the clipping threshold level, an inverse calculator (1112) outputs a second smoothed signal by multiplying the clipping threshold level by an inverse of the added signal, and a multiplier (1114) outputs a final PAPR-reduced signal by multiplying the input signal by the second smoothed signal. The method and apparatus address an overcompensation problem while processing signals having a large bandwidth and a high data rate without delay, thereby minimizing the clipping influences on Bit Error Rate (BER) and Adjacent Channel Leakage Ratio (ACLR) performances.
Bibliography:Application Number: EP20110150787