DocumentCode :
3222536
Title :
Preamble-based channel estimation in MIMO-OFDM/OQAM systems
Author :
Kofidis, Eleftherios ; Katselis, Dimitrios
Author_Institution :
Dept. of Stat. & Insurance Sci., Univ. of Piraeus, Piraeus, Greece
fYear :
2011
fDate :
16-18 Nov. 2011
Firstpage :
579
Lastpage :
584
Abstract :
Filter bank-based multicarrier modulation (FBMC) using offset quadrature amplitude modulation (OQAM), known as OFDM/OQAM (or FBMC/OQAM), provides an attractive alternative to the conventional cyclic prefix-based orthogonal frequency division multiplexing (CP-OFDM), especially in terms of increased robustness to frequency offset and Doppler spread, and high bandwidth efficiency. It suffers, however, from an inherent (intrinsic) imaginary inter-carrier/inter-symbol interference that complicates signal processing tasks such as channel estimation (CE). Recently, the so-called interference approximation method (IAM) was proposed for preamble-based CE in single-input single-output (SISO) systems. It relies on the knowledge of the pilot´s neighborhood to approximate this interference and constructively exploit it in simplifying CE and improving its performance. A number of IAM preambles have been proposed, with varying CE performance. This paper is concerned with the application of the IAM idea in multi-input multi-output (MIMO) systems. The most prominent IAM variants are considered and their MIMO extensions with their relative advantages and practical issues are investigated. The IAM preambles are compared, with each other and with CP-OFDM, via simulations in both mildly and highly frequency-selective channels.
Keywords :
MIMO communication; OFDM modulation; channel estimation; quadrature amplitude modulation; signal processing; Doppler spread; MIMO-OFDM/OQAM systems; SISO; cyclic prefix-based orthogonal frequency division multiplexing; filter bank-based multicarrier modulation; frequency selective channels; inter-carrier/inter-symbol interference; interference approximation method; multi-input multi-output systems; offset quadrature amplitude modulation; preamble-based channel estimation; signal processing; single-input single-output systems; Interference; MIMO; Modulation; Noise; OFDM; Time frequency analysis; Transmitting antennas;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Signal and Image Processing Applications (ICSIPA), 2011 IEEE International Conference on
Conference_Location :
Kuala Lumpur
Print_ISBN :
978-1-4577-0243-3
Type :
conf
DOI :
10.1109/ICSIPA.2011.6144161
Filename :
6144161
Link To Document :
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