计算机工程 ›› 2009, Vol. 35 ›› Issue (10): 98-101.doi: 10.3969/j.issn.1000-3428.2009.10.032

• 网络与通信 • 上一篇    下一篇

FMT频域信道估计算法的研究及其性能分析

金国平,钟 华,郑林华   

  1. (国防科技大学电子科学与工程学院,长沙 410073)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2009-05-20 发布日期:2009-05-20

Research and Performance Analysis of Channel Estimation Algorithm in FMT Frequency Domain and Its Performance Analysis

JIN Guo-ping, ZHONG Hua, ZHENG Lin-hua   

  1. (School of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073)
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-05-20 Published:2009-05-20

摘要: 针对自适应均衡给滤波多音(FMT)调制(FMT)系统带来的复杂性以及时域导频估计的低信道利用率问题,通过分析FMT子通道信号,提出FMT系统的频域估计算法。根据频域采样定理,在FMT频域按一定的规律插入导频序列,通过导频子通道在接收端获得信道的离散傅里叶变换。理论分析和仿真实验表明,该算法具有良好的译码性能和抗频偏能力。

关键词: 滤波多音调制技术, 多径, 信道估计, 导频, 频偏

Abstract: Because Filtered Multi-Tone(FMT) systems has a complicated structure with an adaptive equalizing technology and low efficiency with channel estimations using pilots in time domain, this paper analyzes a signal in one subchannel and presents a new algorithm for channel estimation in FMT frequency domain. The algorithm selects some pilot subchannels and inserts the pilot sequence in them. Discrete Fourier Transform(DFT) of channel is gained with signals in pilot subchannels at the receiver. Theory analysis and simulation experiment show that the algorithm has less BER and does well in anti-frequency-offset.

Key words: Filtered Multi-Tone(FMT) technology, multipath, channel estimation, pilot, frequency offset

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