The invention belongs to the technical field of ultra wideband, in particular to a frequency deviation estimation and compensation method. The present invention includes estimation and compensation of carrier frequency offset (CFO) and estimation and compensation of sampling clock frequency offset (SFO), and can be applied to multiband orthogonal frequency division multiplexing ultra wideband (MB-OFDMUWB) systems. The invention uses fast Fourier transform (FFT) estimation and pre compensation CFO and SFO 4 OFDM after the preamble symbol, then channel estimation, estimation and compensation and residual CFO and SFO using a pilot signal for each OFDM symbol in the. With the frequency offset estimation and compensation algorithm of the invention, the estimation accuracy of frequency offset is greatly improved, and the complexity of the hardware implementation of the system is effectively reduced. And when the carrier frequency offset and the sampling clock frequency deviation are relatively large, the system performance can also be maintained.
【技术实现步骤摘要】
【技术保护点】
1.一种应用于多带正交频分复用超宽带系统的频偏估计与补偿方法,其特征在于具体步骤如下:1)将接收到的信号进行快速傅里叶变换,将时域信号变为频域信号,以便进行后续处理;2)从频域信号中提取出4组前导OFDM符号,进行载波频偏和采样频偏的联合估计,其估计的公式为: ,其中记: ,则有: ,这里,angle(.)为返回复数的相角,、、、为接收到的从频域信号中提取出的连续4组前导OFDM符号数据,k 为OFDM符号的子载波序号,即第k个子载波, N是OFDM符号子载波的数目,M是一个O ...
【技术特征摘要】
【专利技术属性】
技术研发人员:叶凡,李凯,李慕媛,任俊彦,李宁,许俊,李巍,
申请(专利权)人:复旦大学,
类型:发明
国别省市:31
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