DocumentCode :
676766
Title :
Iterative training signal design for MIMO multiuser systems
Author :
Fung, Carrson C. ; Yu-Ting Wong
Author_Institution :
Dept. of Electron. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
fYear :
2013
fDate :
22-25 Oct. 2013
Firstpage :
1
Lastpage :
4
Abstract :
An iterative training sequence design scheme called Iterative SuperImposed training sequence design with Multiple Interferers, or ISIMI, is proposed for estimating MIMO channels with colored noise. The proposed approach decomposes the MIMO channel and design the training sequence on a per channel basis, thus making the use of sequential minimum mean-squared error (MMSE) estimator ideal for channel estimation. The time-multiplexed-superimposed training (TM-SIT) transmission format is also proposed to accommodate the different training sequences obtained via the proposed ISIMI method. The proposed approach does not use nonlinear optimization as utilized in previous literature, nor make any assumption about the lack of interdependence between the transmitter and receiver. The approach can be proven to converge to at least a local optimal solution and is shown consistently by Monte Carlo simulation to outperform previously proposed MMSE based approaches by 4 dB for 4×4 MIMO systems, respectively, in terms of MSE when the sequential MMSE estimator is used.
Keywords :
MIMO communication; channel estimation; least mean squares methods; multiuser channels; radiofrequency interference; ISIMI; MIMO channel estimation; MIMO multiuser systems; colored noise; iterative superimposed training sequence; iterative training sequence design; iterative training signal design; local optimal solution; multiple interferer; sequential minimum mean squared error estimation; time multiplexed superimposed training transmission; Channel estimation; Colored noise; MIMO; Receivers; Training; Transmitters; Vectors; MIMO; affine precoder; channel estimation; colored noise; multiuser interference; spatial correlation; superimposed training sequence;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
TENCON 2013 - 2013 IEEE Region 10 Conference (31194)
Conference_Location :
Xi´an
ISSN :
2159-3442
Print_ISBN :
978-1-4799-2825-5
Type :
conf
DOI :
10.1109/TENCON.2013.6718998
Filename :
6718998
Link To Document :
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