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Paper Abstract and Keywords
Presentation 2011-03-02 10:00
Decision Directed Channel Tracking for MIMO-Constant Envelope Modulation
Ehab Mahmoud Mohamed (Kyushu Univ/South Valley Univ. Egypt), Osamu Muta, Hiroshi Furukawa (Kyushu Univ) RCS2010-259
Abstract (in Japanese) (See Japanese page) 
(in English) The authors have proposed Multi-Input Multi-Output (MIMO)-Constant Envelope Modulation, MIMO-CEM, as power and complexity efficient alternative to MIMO-OFDM, suitable for wireless backhaul networks. Because MIMO-CEM receiver employs a low resolution ADC (1-bit in the default operation) which enables to reduce power consumption in analog devices but induces large quantization noise, Therefore, MIMO-CEM channel estimation is considered as one of the major challenges toward its real application. The authors have proposed a block based adaptive channel estimator in static and quasi-static channel conditions, where channel parameters are iteratively estimated by observing the received preamble signals. The objective of this paper is to present a decision directed channel estimation (DDCE) to track channel fluctuation in high Doppler frequency condition, and clarify the effectiveness of our method in dynamic channel condition. For the comparison purpose, the performance of DDCE is compared with that of a pilot assisted linear interpolation channel tracking for MIMO-CEM. For performance evaluations, different Doppler frequencies are assumed to prove the effectiveness of the scheme even in high channel variations. Simulation results prove that MIMO-CEM is applicable to time-varying channel conditions with various Doppler frequencies.
Keyword (in Japanese) (See Japanese page) 
(in English) MIMO / Constant envelope modulation / Decision directed channel tracking / adaptive channel estimation / Low resolution ADC / / /  
Reference Info. IEICE Tech. Rep., vol. 110, no. 433, RCS2010-259, pp. 67-72, March 2011.
Paper # RCS2010-259 
Date of Issue 2011-02-23 (RCS) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
Download PDF RCS2010-259

Conference Information
Committee RCS MoNA SR  
Conference Date 2011-03-02 - 2011-03-04 
Place (in Japanese) (See Japanese page) 
Place (in English) YRP 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Mobile Communication Workshop 
Paper Information
Registration To RCS 
Conference Code 2011-03-RCS-MoMuC-SR 
Language English (Japanese title is available) 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Decision Directed Channel Tracking for MIMO-Constant Envelope Modulation 
Sub Title (in English)  
Keyword(1) MIMO  
Keyword(2) Constant envelope modulation  
Keyword(3) Decision directed channel tracking  
Keyword(4) adaptive channel estimation  
Keyword(5) Low resolution ADC  
1st Author's Name Ehab Mahmoud Mohamed  
1st Author's Affiliation Kyushu University/South Valley University. Egypt (Kyushu Univ/South Valley Univ. Egypt)
2nd Author's Name Osamu Muta  
2nd Author's Affiliation Kyushu University (Kyushu Univ)
3rd Author's Name Hiroshi Furukawa  
3rd Author's Affiliation Kyushu University (Kyushu Univ)
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Date Time 2011-03-02 10:00:00 
Presentation Time 20 
Registration for RCS 
Paper # IEICE-RCS2010-259 
Volume (vol) IEICE-110 
Number (no) no.433 
Page pp.67-72 
#Pages IEICE-6 
Date of Issue IEICE-RCS-2011-02-23 

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