摘要
针对自适应均衡给滤波多音(FMT)调制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。
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.
出处
《计算机工程》
CAS
CSCD
北大核心
2009年第10期98-100,共3页
Computer Engineering
关键词
滤波多音调制技术
多径
信道估计
导频
频偏
Filtered Multi-Tone（FMT） technology
multipath
channel estimation
pilot
frequency offset
