%0 Journal Article
%T Gabor Dual Frames with Characteristic Function Window
%J Sahand Communications in Mathematical Analysis
%I University of Maragheh
%Z 2322-5807
%A Hasankhani Fard, Mohammad Ali
%D 2021
%\ 02/01/2021
%V 18
%N 1
%P 47-57
%! Gabor Dual Frames with Characteristic Function Window
%K Frame
%K Dual frame
%K Gabor system
%K Gabor frame
%R 10.22130/scma.2020.121704.751
%X The duals of Gabor frames have an essential role in reconstruction of signals. In this paper we find a necessary and sufficient condition for two Gabor systems $left(chi_{left[c_1,d_1right)},a,bright)$ and $left(chi_{left[c_2,d_2right)},a,bright)$ to form dual frames for $L_2left(mathbb{R}right)$, where $a$ and $b$ are positive numbers and $c_1,c_2,d_1$ and $d_2$ are real numbers such that $c_1