Constant Information Radar for Dynamic Shared Spectrum Access

We derive the constant information radar, or CIR. Previous works developed the notion of a radar estimation rate, a measure of information shared between the true target range and range-rate, and the actual noisy measurement over time. This measure provided a means to compare various cooperative schemes for shared spectrum access for radar and communications (SSPARC). Since it provides a measure of target uncertainty and thus information transfer for a given tracking loop period, it can be used to modulate radar emission rate to minimize shared spectrum impact to communications networks.