Further results on wideband sensor array processing using a laboratory array testbed

This paper presents further experimental results for the wideband direction-finding problem using actual array data collected by a sensor array testbed. Experimental results such as these are needed to validate the theoretical performance of recent wideband array processing algorithms. To calibrate the array, the non-ideal response of the actual sensor is compensated for by using calibration filters to match the response of each to a reference sensor. Experimental results are given for a number of wideband algorithms which attempt to focus the information to a single frequency. The focusing algorithms investigated include the spatial resampling method and the coherent signal subspace methods (CSM). Experimental direction-finding results are presented for the algorithms MUSIC, root-MUSIC, WMUSIC, and TLS-ESPRIT. The source detection algorithms MDL, AIC, and an eigenvector based detection algorithm are also tested