Some Types of Linear Combinations of Weyl-Heisenberg Wave Packet Frames   Over Local Fields of Positive Characteristic
  In this paper, we present necessary and sufficient conditions for some types of linear combination of frame elements (wave packet) to be a frame for $L^2(\mathbb{K})$, where $\mathbb{K}$ is a local field of positive characteristic. 
Lalit K. Vashisht
math.FA