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Paper Abstract and Keywords
Presentation 2022-10-13 11:10
[Poster Presentation] Improving CSI Interpolation Accuracy of Iterative IDFT/DFT with HTRCI for OFDM Scattered Pilots
Ren Takahashi, Kazuki Maruta (Tokyo Univ. of Science), Yuta Ida (Yamaguchi Univ.)
Abstract (in Japanese) (See Japanese page) 
(in English) Scattered pilot assignment can enhance channel estimation and data transmission efficiency in orthogonal frequency division multiplexing (OFDM).
Null subcarriers, where pilot symbols are not assigned, are available to estimate channel state information (CSI) for other user terminals or antenna elements.
It can also realize efficient multiple CSI estimation.
In this case, CSI for null subcarriers should be interpolated and its accuracy affects data transmission performance.

We previously proposed highly accurate CSI interpolation scheme by iterative IFFT/FFT with time-domain zeroizing and frequency-domain pilot subcarrier replacement.
This paper further enhances CSI estimation accuracy by incorporating high-time resolution carrier interferometry (HTRCI) which combines aliases of impulse response to realize CSI interpolation.
Computer simulation discloses its effectiveness in terms of CSI estimation accuracy and bit error rate (BER) performances.
Keyword (in Japanese) (See Japanese page) 
(in English) OFDM / Channel estimation / Interpolation / Scattered pilot / Zeroizing / HTRCI / /  
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Conference Information
Committee MIKA  
Conference Date 2022-10-12 - 2022-10-15 
Place (in Japanese) (See Japanese page) 
Place (in English) Niigata Citizens Plaza 
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Paper Information
Registration To MIKA 
Conference Code 2022-10-MIKA 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Improving CSI Interpolation Accuracy of Iterative IDFT/DFT with HTRCI for OFDM Scattered Pilots 
Sub Title (in English)  
Keyword(1) OFDM  
Keyword(2) Channel estimation  
Keyword(3) Interpolation  
Keyword(4) Scattered pilot  
Keyword(5) Zeroizing  
Keyword(6) HTRCI  
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1st Author's Name Ren Takahashi  
1st Author's Affiliation Tokyo University of Science (Tokyo Univ. of Science)
2nd Author's Name Kazuki Maruta  
2nd Author's Affiliation Tokyo University of Science (Tokyo Univ. of Science)
3rd Author's Name Yuta Ida  
3rd Author's Affiliation Yamaguchi University (Yamaguchi Univ.)
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Speaker Author-1 
Date Time 2022-10-13 11:10:00 
Presentation Time 50 minutes 
Registration for MIKA 
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