Waveform Design for Joint Radar-Communications with Low Complexity Analog Components

In this paper, we aim to design an efficient and
low hardware complexity based dual-function multiple-input
multiple-output (MIMO) joint radar-communication (JRC) system.
It is implemented via a low complexity analog architecture,
constituted by a phase shifting network and variable gain amplifier.
The proposed system exploits the multiple antenna transmitter
for the simultaneous communication with multiple downlink
users and radar target detection. The transmit waveform of
the proposed JRC system is designed to minimize the downlink
multi-user interference such that the desired radar beampattern
is achieved and the architecture specific constraints are satisfied.
The resulting optimization problem is non-convex and in general
difficult to solve. We propose an efficient algorithmic solution
based on the primal-dual framework. The numerical results show
the effectiveness of the proposed approach.