DocumentCode
597015
Title
Adaptive slope and threshold companding technique for PAPR reduction in OFDM systems
Author
Yenamandra, V. ; Feiran Lei ; Al-Araji, Saleh ; Ali, Nawazish ; Ismail, Mahamod
Author_Institution
Analog VLSI Lab., Ohio State Univ., Columbus, OH, USA
fYear
2012
fDate
9-12 Dec. 2012
Firstpage
312
Lastpage
315
Abstract
High Peak to Average Power Ratio (PAPR) of transmitted signals is a major drawback for multi-carrier modulation systems such as orthogonal frequency division multiplexing (OFDM) systems. Companding technique has been recently used to reduce PAPR. In this work, an adaptive slope and threshold (AST) companding transform is proposed to increase the reduction in PAPR with minimum degradation of received bit error rate (BER). The key idea is to adaptively vary both the slope of expansion and the threshold for expansion of the input signal amplitude to optimize the PAPR/BER tradeoff. This is implemented by selecting slope and threshold ratios in real-time from a look-up table (LUT) on the basis of the received feedback, making it adaptive.
Keywords
OFDM modulation; error statistics; feedback; AST; LUT; OFDM systems; PAPR reduction; PAPR-BER tradeoff; adaptive slope; adaptive slope and threshold; bit error rate; companding transform; high peak to average power ratio; look-up table; multicarrier modulation systems; orthogonal frequency division multiplexing; received feedback; threshold companding technique; transmitted signals; Adaptive systems; Bit error rate; Peak to average power ratio; Receivers; Signal to noise ratio; Transforms; Adaptive Companding; BER Improvement; MIMO; OFDM; PAPR Reduction;
fLanguage
English
Publisher
ieee
Conference_Titel
Electronics, Circuits and Systems (ICECS), 2012 19th IEEE International Conference on
Conference_Location
Seville
Print_ISBN
978-1-4673-1261-5
Electronic_ISBN
978-1-4673-1259-2
Type
conf
DOI
10.1109/ICECS.2012.6463739
Filename
6463739
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