US Patent 9591404 Beamformer design using constrained convex optimization in three-dimensional space

Embodiments of systems and methods are described for determining weighting coefficients based at least in part on using convex optimization subject to one or more constraints to approximate a three-dimensional beampattern. In some implementations, the approximated three-dimensional beampattern comprises a main lobe that includes a look direction for which waveforms detected by a sensor array are not suppressed and a side lobe that includes other directions for which waveforms detected by the microphone array are suppressed. The one or more constraints can include a constraint that suppression of waveforms received by the sensor array from the side lobe are greater than a threshold. In some implementations, the threshold can be dependent on at least one of an angular direction of the waveform and a frequency of the waveform.