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このアイテムの引用には次の識別子を使用してください:
http://hdl.handle.net/10119/10532
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| タイトル: | Soft-feedback MMSE Equalization for Non-orthogonal Frequency Division Multiplexing (n-OFDM) Signal Detection |
| 著者: | Ahmad, Norulhusna
S-Yusof, S. Kamilah
Fisal, Norsheila
Anwar, Khoirul
Matsumoto, Tad |
| キーワード: | OFDM
Overlapping subcarrier
Spectrum Efficiency |
| 発行日: | 2012-03-07 |
| 出版者: | Institute of Electrical and Electronics Engineers (IEEE) |
| 誌名: | 2012 International ITG Workshop on Smart Antennas (WSA) |
| 開始ページ: | 248 |
| 終了ページ: | 255 |
| DOI: | 10.1109/WSA.2012.6181215 |
| 抄録: | A frequency division multiplexing technique, nonorthogonal frequency division multiplexing (n-OFDM), is proposed in [1]- [2] to enhance the efficiency of bandwidth utilization. This paper reveals that the smaller the frequency separation, the larger sum capacity can be achieved compared with the conventional OFDM technique. However, n-OFDM system introduces inter-carrier interference (ICI) at the transmitter because the orthogonality between the subcarriers no longer holds. Moreover, since the channel covariance matrix of n-OFDM has high condition number when the overlapping factor, 1 - α, is large, conventional linear detectors suffers from severe noise enhancement. To solve this problem, this paper proposes the use of soft cancellation- minimum mean-squared error (SCMMSE) turbo equalization. Binary constellation constrained mutual information (CCMI) is calculated by utilizing the area property for the EXtrinsic Information Transfer (EXIT) chart of the SC-MMSE equalizer. Results of the EXIT chart analysis and bit-error-rate (BER) simulations in additive white Gaussian noise (AWGN) channel are presented. |
| Rights: | This is the author's version of the work. Copyright (C) 2012 IEEE. 2012 International ITG Workshop on Smart Antennas (WSA), 2012, 248-255. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. |
| URI: | http://hdl.handle.net/10119/10532 |
| 資料タイプ: | author |
| 出現コレクション: | b11-1. 会議発表論文・発表資料 (Conference Papers)
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