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-Nov-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
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