# guard interval calculation for multi-cell massive MIMO

I am interested in a multi-call massive-MIMO system modeled as in the works of T. Marzetta, for example: "Inter-Cell Interference in Noncooperative TDD Large Scale Antenna Systems".

In these works, the channel between the $$k$$ user of the $$j$$ cell and base station of the $$i$$ cell is modeled as $$\boldsymbol{g}_{ij}=\beta_{ikj}\boldsymbol{h}_{ikj}$$ with $$\boldsymbol{h}_{ikj}$$ the "white" channel and $$\beta_{ikj}$$ large-scale fading coefficients.

I am interested in how to calculate the length of the guard interval in such a system, assuming that the channels between cells are not negligible.

• What do you mean by the guard interval here? – BlackMath Mar 30 at 9:33