Title :
Analysis of carrier frequency offset in Alamouti space-time-frequency coded OFDM systems
Author :
Suraweera, Himal A. ; Armstrong, Jean
Author_Institution :
Dept. of Electr. & Comput. Syst. Eng., Monash Univ., Melbourne, Vic.
Abstract :
It is well known that orthogonal frequency division multiplexing (OFDM) systems are sensitive to carrier frequency offset (CFO). In this paper we present the effects of CFO for OFDM systems where the Alamouti code is used to map adjacent subcarriers (space-frequency) or symbols (space-time) across the space-frequency grid. Simulation results show that space-time-frequency coded OFDM systems are more sensitive to CFO effects than conventional OFDM. We have also presented an analytical error performance analysis for the case of STC-OFDM over frequency flat Rayleigh fading channels. The theoretical results have been validated from the simulations. However the usually assumed signal independent Gaussian ICI analysis provides pessimistic results
Keywords :
Gaussian channels; OFDM modulation; Rayleigh channels; adjacent channel interference; error analysis; space-time codes; Alamouti code; CFO; Gaussian ICI analysis; OFDM; Rayleigh fading channel; STC; carrier frequency offset; error performance analysis; interchannel interference; orthogonal frequency division multiplexing system; space-time-frequency coded system; Bandwidth; Error analysis; Fading; Interference; MIMO; Mobile communication; Modeling; OFDM; Performance analysis; Rayleigh channels;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2005. PIMRC 2005. IEEE 16th International Symposium on
Conference_Location :
Berlin
Print_ISBN :
9.7838007291e+012
DOI :
10.1109/PIMRC.2005.1651625
