標題: | Adaptive Frequency-Domain Channel Estimator in 4 x 4 MIMO-OFDM Modems |
作者: | Sun, Ming-Fu Juan, Ta-Yang Lin, Kan-Si Hsu, Terng-Yin 資訊工程學系 Department of Computer Science |
關鍵字: | Adaptive equalizers;multiple-input multiple- output (MIMO) systems;orthogonal frequency-division multiplexing (OFDM);VLSI |
公開日期: | 1-十一月-2009 |
摘要: | This work presents an adaptive frequency-domain channel estimator (FD-CE) for equalization of space-time block code multiple-input multiple-output ( MIMO) orthogonal frequency-division multiplexing (OFDM) systems in time-varying frequency-selective fading. The proposed adaptive FD-CE ensures the channel estimation accuracy in each set of four MIMO-OFDM symbols. Performance evaluation shows that the proposed method achieved a 10% packet error rate of 64 quadrature amplitude modulation (QAM) at 29.5 dB SNR under 120 km/h ( Doppler shift is 266 Hz) in 4 4 MIMO-OFDM systems. To decrease complexity, the rich feature of Alamouti-like matrix is exploited to derive an efficient very large-scale integration (VLSI) solution. Finally, this adaptive FD-CE using an in-house 0.13-m CMOS library occupies an area of 3 X 3.1 mm(2), and the 4 X 4 MIMO-OFDM modem consumes about 62.8 mW at 1.2 V supply voltage. |
URI: | http://dx.doi.org/10.1109/TVLSI.2008.2005672 http://hdl.handle.net/11536/6541 |
ISSN: | 1063-8210 |
DOI: | 10.1109/TVLSI.2008.2005672 |
期刊: | IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS |
Volume: | 17 |
Issue: | 11 |
起始頁: | 1616 |
結束頁: | 1625 |
顯示於類別: | 期刊論文 |