Interference-aware power allocation in OFDMA radar

In previous work we developed the notion of an orthogonal frequency division multiple access (OFDMA) radar: an OFDMA radar is able to execute multiple radar tasks simultaneously. OFDMA encodes information on subcarriers in the frequency domain. By assigning each task a disjoint set of subcarriers, zero-forcing allows for the independent execution of tasks. In this paper we extend this notion further to illustrate another capability of the OFDMA framework, viz., the ability to allocate power differently to different tasks; this degree of freedom in resource allocation can be exploited to enable prioritization amongst the various tasks the radar must execute. In this paper, as proof of concept, we develop the notion of interference-aware power allocation.