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
中图分类号:
金国平;钟 华;郑林华. FMT频域信道估计算法的研究及其性能分析[J]. 计算机工程, 2009, 35(10): 98-101.
JIN Guo-ping; ZHONG Hua; ZHENG Lin-hua. Research and Performance Analysis of Channel Estimation Algorithm in FMT Frequency Domain and Its Performance Analysis[J]. Computer Engineering, 2009, 35(10): 98-101.