標題: | Channel Estimator and Aliasing Canceller for Equalizing and Decoding Non-Cyclic Prefixed Single-Carrier Block Transmission via MIMO-OFDM Modem |
作者: | Cheng, Shau-Yu Tsai, Chueh-An Hsu, Terng-Yin 資訊工程學系 Department of Computer Science |
關鍵字: | Aliasing canceller;channel estimator;compatibility;multimode;single-carrier block transmission (SCBT);single-carrier frequency-domain equalization (SC-FDE) |
公開日期: | 1-一月-2011 |
摘要: | Without a cyclic prefix (CP), most single-carrier (SC) transmissions can not adopt frequency-domain equalizer (FDE) directly. This work utilizes frequency-domain channel estimator (FD-CE) and decision-feedback aliasing canceller (DF-AC) to produce single-FFT SC-FDE. In this way, non-CP single-carrier block transmission (SCBT) can be decoded using sphere decoder of MIMO-OFDM modems to support multimode and backward compatibility under an acceptable complexity in IEEE 802.11 very high throughput (VHT). An N-point FFT is sufficient to measure channel frequency responses (CFR) from L-sample preambles (L <= N/2). And then, M-bit block codes (M <= L) are decodable over frequency domains with DF-AC's help. Simulations and measurements imply that this work can ensure adequate performance, even if there is no CP existed against the distortions of multipath propagation. |
URI: | http://dx.doi.org/10.1109/TVLSI.2009.2031137 http://hdl.handle.net/11536/26166 |
ISSN: | 1063-8210 |
DOI: | 10.1109/TVLSI.2009.2031137 |
期刊: | IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS |
Volume: | 19 |
Issue: | 1 |
起始頁: | 156 |
結束頁: | 160 |
顯示於類別: | 期刊論文 |