講演抄録/キーワード |
講演名 |
2010-03-04 13:40
Adaptive Modulation Scheme Incorporating Spatial Fading Correlation for OFDM with Time Shifted Sampling ○Refik Caglar Kizilirmak・Yukitoshi Sanada(Keio Univ.) SR2009-110 |
抄録 |
(和) |
In this report, an adaptive modulated orthogonal frequency division multiplexing (OFDM) scheme that provides e?cient data transmission for correlated receiver antenna arrays is proposed. Previously reported adaptive modulation schemes generally select the modulation scheme based on the estimated carrier-to-noise ratio (CNR) on each subcarrier. However, in antenna array communication in addition to the CNR, the spatial fading correlation should also be considered to evaluate the system performance. Especially, when the Time Shifted Sampling (TSS)
technique is applied which overcomes the spatial correlation for some subchannels of an OFDM symbol, the spatial correlation varies dramatically through subcarriers. In this work, modulation scheme is selected based on the CNR and the spatial correlation coe?cient for each subcarrier when the TSS technique is employed at the receiver. Numerical results through computer simulation show that the proposed scheme outperforms the conventional systems in achieving a target BER and establishing reliable communication while having almost the same transmission rate. |
(英) |
In this report, an adaptive modulated orthogonal frequency division multiplexing (OFDM) scheme that provides e?cient data transmission for correlated receiver antenna arrays is proposed. Previously reported adaptive modulation schemes generally select the modulation scheme based on the estimated carrier-to-noise ratio (CNR) on each subcarrier. However, in antenna array communication in addition to the CNR, the spatial fading correlation should also be considered to evaluate the system performance. Especially, when the Time Shifted Sampling (TSS)
technique is applied which overcomes the spatial correlation for some subchannels of an OFDM symbol, the spatial correlation varies dramatically through subcarriers. In this work, modulation scheme is selected based on the CNR and the spatial correlation coe?cient for each subcarrier when the TSS technique is employed at the receiver. Numerical results through computer simulation show that the proposed scheme outperforms the conventional systems in achieving a target BER and establishing reliable communication while having almost the same transmission rate. |
キーワード |
(和) |
Adaptive Modulation / OFDM / Spatial Fading Correlation / Time Shifted Sampling / / / / |
(英) |
Adaptive Modulation / OFDM / Spatial Fading Correlation / Time Shifted Sampling / / / / |
文献情報 |
信学技報, vol. 109, no. 442, SR2009-110, pp. 131-136, 2010年3月. |
資料番号 |
SR2009-110 |
発行日 |
2010-02-24 (SR) |
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 |
SR2009-110 |