Performance of OTH radar array calibration

Array calibration algorithms for over-the-horizon (OTH) radar arrays have been proposed in the literature. These algorithms perform array calibration by using echoes from ionised meteor trails, and estimate sensor position errors and mutual coupling. We derive the Cramer-Rao performance bound for this array calibration problem and then investigate the performance bound. We obtain insight on the achievable accuracy as a function of the signal-to-noise ratio, number of snapshots and number of sources. Further, we consider the advantage of using sources with known bearings, as opposed to unknown bearings, and consider the identifiability of the array calibration problem