We also study the spatial and spectral tradeoff between multiple antennas and side channel on the symmetric DMT.
In TDI (Vandepeer and Reid 1995b), complex time series from spaced receivers are analyzed using the zero lag cross-correlation phase measured between multiple antenna pairs to determine a single angle of arrival of the backscatter from each data record.
Next, we will present how CSIT and the use of side channel is correlated, we also characterize the spatial and spectral tradeoff between multiple antennas at different nodes and spectral resources provided by side channel.
This requirement is motivated by the frequency diversity introduced by the timing offset between multiple antennas [15].
However, correlation between multiple antennas has an adverse effect as shown in [10], especially when correlation affects the BS side.
The insights gained from GDoF reveal the tradeoff between spatial resources from multiple antennas and spectral resources of the side channels as well as the interplay between the channel uncertainty at the transmitter and the use of side channel.
We give a characterization of GDoF which reveals tradeoff between spatial resources from multiple antennas and spectral resources of the side channels under both CSIT and no-CSIT assumptions.
By comparing these three systems, we aim to quantify the relationship between the spatial resources of multiple antennas and spectral resources of the side channel.
Here, the transmission between a central unit, equipped with multiple antennas, and independent users, each equipped with a single or multiple antennas, takes place.
Multiple antenna systems, such as Multiple-Input-Multiple-Output (MIMO), can create spatial diversity by taking advantage of multiple antennas and significantly increase the wireless channel capacity.
