Title :
Optimal Adaptive Hyperbolic Companding for OFDM
Author :
Lowe, Darryn ; Huang, Xiaojing
Author_Institution :
Univ. of Wollongong, Wollongong
Abstract :
In this paper, we derive and analyze a companding algorithm based on the hyperbolic tangent and inverse hyperbolic tangent functions for use in orthogonal frequency division multiplexing (OFDM) transceivers. Probability density functions (PDFs) that approximate the transmitted and received OFDM signals in the presence of additive white Gaussian noise (AWGN) are derived and used to analyze the degree of companding relative to the signal-to-noise ratio (SNR) and clipping level. A set of optimal companding linearity coefficients for the multi-band OFDM (MB-OFDM) ultra-wideband (UWB) standard are presented.
Keywords :
OFDM modulation; hyperbolic equations; transceivers; additive white Gaussian noise; inverse hyperbolic tangent function; multi-band OFDM signal; optimal adaptive hyperbolic companding algorithm; optimal companding linearity coefficient; orthogonal frequency division multiplexing transceiver; probability density function; signal-to-noise ratio; ultra-wideband standard; AWGN; Additive white noise; Algorithm design and analysis; Linearity; OFDM; Probability density function; Signal analysis; Signal to noise ratio; Transceivers; Ultra wideband technology;
Conference_Titel :
Wireless Broadband and Ultra Wideband Communications, 2007. AusWireless 2007. The 2nd International Conference on
Conference_Location :
Sydney, NSW
Print_ISBN :
978-0-7695-2846-5
Electronic_ISBN :
978-0-7695-2846-5
DOI :
10.1109/AUSWIRELESS.2007.52
