[1] Song Tiecheng, You Xiaohu, Shen Lianfeng, Song Xiaojin, et al. Adaptive channel estimation based on pilot signalsand transform-domain processing in SISO/MIMO OFDM systems [J]. Journal of Southeast University (English Edition), 2005, 21 (3): 249-253. [doi:10.3969/j.issn.1003-7985.2005.03.001]
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Adaptive channel estimation based on pilot signalsand transform-domain processing in SISO/MIMO OFDM systems(
)
基于导频和变换域的SISO/MIMO OFDM系统自适应信道估计
)Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]
- Volumn:
- 21
- Issue:
- 2005 3
- Page:
- 249-253
- Research Field:
- Information and Communication Engineering
- Publishing date:
- 2005-09-30
Info
- Title:
- Adaptive channel estimation based on pilot signalsand transform-domain processing in SISO/MIMO OFDM systems
- 基于导频和变换域的SISO/MIMO OFDM系统自适应信道估计
- Author(s):
- Song Tiecheng; You Xiaohu; Shen Lianfeng; Song Xiaojin
- National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China
- Keywords:
- adaptive channel estimation; orthogonal frequency division multiplex(OFDM); transmit diversity
- PACS:
- TN914.3
- DOI:
- 10.3969/j.issn.1003-7985.2005.03.001
- Abstract:
- Based on the transform-domain characteristics of pilot signals, a band suppression filter is used as a transform-domain filter to restrain the interference of noise in channel estimation.The performance effect on channel estimation for an orthogonal frequency division multiplex(OFDM)system by different energy coefficients in the transform domain and the energy coefficient under the different signal-to-noise ratios(SNR)are also analyzed.A new energy coefficient expression is deduced.It is theoretically proven that dynamically selecting an energy coefficient can significantly improve the performance of channel estimation.Simulation results show that the proposed algorithm can achieve better performance close to the theoretic bounds of perfect channel estimation. The algorithm is adapted to single-input single-output(SISO)OFDM and multi-input multi-output(MIMO)OFDM systems.
- 根据导频信号在变换域中的频响特性, 将系统的变换域滤波器设计成具有更好滤波效果的“带阻滤波器”;在小信噪比和大信噪比条件下, 分析了变换域能量参数对系统信道估计性能的影响, 推导了新的能量参数表达式, 理论证明了根据接收端检测到的信噪比自适应选择能量参数可以显著改善信道估计的性能.仿真结果表明, 提出的信道估计算法具有较好的性能, 在一定程度上可以接近于理想信道估计的性能, 适用于SISO OFDM系统和MIMO OFDM系统.
References:
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Memo
- Memo:
- Biographies: Song Tiecheng(1967—), male, professor, songtc@seu.edu.cn;You Xiaohu(1962—), male, doctor, professor, xhyu@seu.edu.cn.