標題: | A Robust Channel Estimator for High-Mobility STBC-OFDM Systems |
作者: | Chen, Hsiao-Yun Ku, Meng-Lin Jou, Shyh-Jye Huang, Chia-Chi 電機工程學系 電信工程研究所 Department of Electrical and Computer Engineering Institute of Communications Engineering |
關鍵字: | Channel estimator;space-time block code;orthogonal frequency division multiplexing;IEEE 802.16e |
公開日期: | 1-四月-2010 |
摘要: | In this paper, a robust channel estimator for high-mobility space-time block code-orthogonal frequency division multiplexing (STBC-OFDM) systems is proposed and applied in IEEE 802.16e systems. A high-performance two-stage channel estimation method is adopted. The proposed architecture reduces computational complexity effectively and improves 85.2% of the hardware implementation. The performances of the proposed design have been demonstrated through the simulation of an STBC-OFDM system with two transmit antennas and one receive antenna. At the vehicle speed of 120 and 240 km/hr for quadrature phase shift keying (QPSK) modulation, the proposed design can achieve the bit-error rate (BER) of about 10(-4) and 10(-3) without using channel coding. Moreover, it has significant performance improvement as compared with interpolation-based channel estimation methods. The proposed channel estimator implemented in 90 nm CMOS technology can support up to 29.03 Mbps (uncoded) downlink data transmission. The design only requires 859.6 K gates and dissipates 43.71 mW at 83.3 MHz operating frequency with 1 V power supply. |
URI: | http://dx.doi.org/10.1109/TCSI.2009.2027629 http://hdl.handle.net/11536/5604 |
ISSN: | 1549-8328 |
DOI: | 10.1109/TCSI.2009.2027629 |
期刊: | IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS |
Volume: | 57 |
Issue: | 4 |
起始頁: | 925 |
結束頁: | 936 |
顯示於類別: | 期刊論文 |