OFDM系统中采用最佳二阶多项式奈奎斯特窗抑制载波间干扰

Optimum Second Order Polynomial Nyquist Windows for Reducting of ICI in OFDM Systems

提出了一种新的时域二阶多项式奈奎斯特(Nyquist)窗,用于在接收端抑制正交频分复用系统中由频偏引起的载波间干扰,同时分析了接收端的信号干扰噪声比(SINR)。通过选择最佳的窗参数,使接收端的SINR达到最大化,从而具有最佳接收性能。这种新的二阶多项式窗的性能被证明优于升余弦窗函数和"better than"Nyquist窗函数。

A new class of time domain second order polynomial Nyquist window functions is proposed and applied to orthogonal frequency-division multiplexing（OFDM） systems for reducing frequency offset induced inter-carrier interference（ICI） at the receiver.The signal to ICI plus noise ratio（SINR） performances of the receiver is analyzed.It also proposes a method to select the window parameters to maximize the SINR of the receiver and to get an optimal performance.The receiving method with optimal second order polynomial window demonstrates a good performance compared with raised cosine and ＂better than＂ Nyquist window.