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Paper Abstract and Keywords
Presentation 2017-06-23 09:30
A Multiple Differential Detection Based on Channel Prediction Employing Soft-Output Per-Survivor Processing
Kazuki Shimomura, Toshiki Mori, Hiroshi Kubo (Ritsumeikan Univ.)
Abstract (in Japanese) (See Japanese page) 
(in English) In order to improve tracking capability for fast time-varying channels, this paper proposes demodulation schemes employing a soft-output Viterbi algorithm (SOVA) for multiple differential detection (MDD) as well as higher order channel prediction and error correction. Although QPSK are generally demodulated based on LLR (log-likelihood ratio) for its soft decisions, it is difficult for JD, which does not explicitly estimate channel state information, to derive LLR. This paper proposes soft decisions for PSP (per-survivor processing), which correspond to metrics difference between the two paths in the Viterbi algorithm (VA) of PSP, where PSP is JD based on the VA. The proposed scheme can improve tracking capability for time-varying channels without an increase of computational complexity. Finally, computer simulation results confirm that the proposed schemes can track four times larger maximum Doppler frequency in fading than the conventional schemes.
Keyword (in Japanese) (See Japanese page) 
(in English) Soft-Output / Viterbi algorithm / Multiple Differential Detection / Higher Order Channel Prediction / Fast Time-Varying Fading / / /  
Reference Info. IEICE Tech. Rep., vol. 117, no. 103, RCS2017-77, pp. 161-166, June 2017.
Paper # RCS2017-77 
Date of Issue 2017-06-14 (RCS) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380

Conference Information
Committee RCS  
Conference Date 2017-06-21 - 2017-06-23 
Place (in Japanese) (See Japanese page) 
Place (in English) Ishigaki Shoukou Kaikan 
Topics (in Japanese) (See Japanese page) 
Topics (in English) First Presentation in IEICE Technical Committee, Railroad Communications, Inter-Vehicle Communications, Road to Vehicle Communications, Resource Control, Scheduling, Wireless Communication Systems, etc. 
Paper Information
Registration To RCS 
Conference Code 2017-06-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Multiple Differential Detection Based on Channel Prediction Employing Soft-Output Per-Survivor Processing 
Sub Title (in English)  
Keyword(1) Soft-Output  
Keyword(2) Viterbi algorithm  
Keyword(3) Multiple Differential Detection  
Keyword(4) Higher Order Channel Prediction  
Keyword(5) Fast Time-Varying Fading  
1st Author's Name Kazuki Shimomura  
1st Author's Affiliation Ritsumeikan University (Ritsumeikan Univ.)
2nd Author's Name Toshiki Mori  
2nd Author's Affiliation Ritsumeikan University (Ritsumeikan Univ.)
3rd Author's Name Hiroshi Kubo  
3rd Author's Affiliation Ritsumeikan University (Ritsumeikan Univ.)
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Date Time 2017-06-23 09:30:00 
Presentation Time 10 
Registration for RCS 
Paper # IEICE-RCS2017-77 
Volume (vol) IEICE-117 
Number (no) no.103 
Page pp.161-166 
#Pages IEICE-6 
Date of Issue IEICE-RCS-2017-06-14 

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