Title :
Carrier frequency dependent throughput analysis for impaired OFDM links under user mobility
Author :
Krondorf, Marco ; Fettweis, Gerhard
Author_Institution :
Tech. Univ. Dresden, Dresden
Abstract :
In this paper we present an analytical approach to evaluate the M-QAM bit error rate and carrier frequency dependent throughput of OFDM systems subject to various receiver impairments and mobile channel characteristics. Specifically we model the following effects: residual carrier frequency offset, outdated channel state information due to user mobility, channel estimation errors and flat receiver I/Q imbalance in Rayleigh time and frequency selective fading channels. We provide a numerical tool to evaluate the uncoded bit error rate as well as mutual information in the case of scattered pilot designs used for pilot-aided linear channel estimation and linear channel interpolation.
Keywords :
OFDM modulation; Rayleigh channels; channel estimation; error statistics; mobile radio; quadrature amplitude modulation; M-QAM bit error rate; Rayleigh time; analytical approach; carrier frequency dependent throughput analysis; carrier frequency offset; channel estimation errors; channel state information; flat receiver I/Q imbalance; frequency selective fading channels; impaired OFDM links; linear channel interpolation; mobile channel characteristics; pilot-aided linear channel estimation; receiver impairments; scattered pilot designs; user mobility; Bit error rate; Channel estimation; Channel state information; Fading; Frequency dependence; Frequency estimation; Mutual information; OFDM; Rayleigh scattering; Throughput;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2008. PIMRC 2008. IEEE 19th International Symposium on
Conference_Location :
Cannes
Print_ISBN :
978-1-4244-2643-0
Electronic_ISBN :
978-1-4244-2644-7
DOI :
10.1109/PIMRC.2008.4699413