  We describe a method for identifying the source of a satellite interferer
using a single satellite. The technique relies on the fact that the strength of
a carrier signal measured at the downlink station varies with time due to a
number of factors, and we use a quantum-inspired algorithm to compute a
'signature' for a signal, which captures part of the pattern of variation that
is characteristic of the uplink antenna. We define a distance measure to
numerically quantify the degree of similarity between two signatures, and by
computing the distances between the signature for an interfering carrier and
the signatures of the known carriers being relayed by the same satellite at the
same time, we can identify the antenna that the interferer originated from, if
a known carrier is being relayed from it. As a proof of concept we evaluate the
performance of the technique using a simple statistical model applied to
measured carrier data.
