The work done on the bionic SONAR head has a dual purpose: 1. to provide a platform from which to investigate the real-time information processing tasks carried out by biological systems -- i.e., echolocating bats; 2. to engender artificial navigation systems with some of the sophisticated performance and robustness of those biological systems.
The bionic SONAR head operates by transmitting a structured call, FM-sweep or CW-pulse, and picking up echoes with a pair of steerable receivers. The raw echo signals are first transformed by a simple model of the bat's cochlea. Next the information from both ears is combined to arrive at estimates of the 3D position of targets. We are exploring the following binaural localisation algorithms: