In this paper, we describe a high-resolution direction-of-arrival (DOA
) estimation algorithm for the enhancement of a lens-based array syste
m. In such a system, the antenna array is followed by an electromagnet
ic lens and a bank of power detectors (crystal video receivers). This
system can handle sources over a large bandwidth and is capable of det
ecting pulsed sources that exist for short periods of time. The propos
ed algorithm operates directly on the power estimates provided by a ba
nk of crystal video receivers (CVRs), yielding accurate DOA estimates
for multiple narrowband sources. This approach is most effective when
the sources are uncorrelated, and it potentially is capable of operati
ng in environments where the signals are highly correlated. We present
computer simulations to demonstrate the improved performance achieved
by the algorithm for different source scenarios.