講演抄録/キーワード |
講演名 |
2011-03-02 10:00
MIMO定包絡線変調のための判定帰還型伝搬路追従技術 ○Ehab Mahmoud Mohamed(九大/South Valley Univ. Egypt)・Osamu Muta・Hiroshi Furukawa(九大) RCS2010-259 |
抄録 |
(和) |
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. |
(英) |
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. |
キーワード |
(和) |
MIMO / Constant envelope modulation / Decision directed channel tracking / adaptive channel estimation / Low resolution ADC / / / |
(英) |
MIMO / Constant envelope modulation / Decision directed channel tracking / adaptive channel estimation / Low resolution ADC / / / |
文献情報 |
信学技報, vol. 110, no. 433, RCS2010-259, pp. 67-72, 2011年3月. |
資料番号 |
RCS2010-259 |
発行日 |
2011-02-23 (RCS) |
ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
著作権に ついて |
技術研究報告に掲載された論文の著作権は電子情報通信学会に帰属します.(許諾番号:10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) |
PDFダウンロード |
RCS2010-259 |
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