Phase space distribution of Gabor expansions

We present an example of a complete and minimal Gabor system consisting of time–frequency shifts of a Gaussian, localized at the coordinate axes in the time–frequency plane (phase space). Asymptotically, the number of time–frequency shifts contained in a disk centered at the origin is only 2/π times the number of points from the von Neumann lattice found in the same disk. Requiring a certain regular distribution in phase space, we show that our system has minimal density among all complete and minimal systems of time–frequency shifts of a Gaussian.