Acoustic Adaptive Transversal Filter.

The availability of spectral information in real-time clearly permits many important new signal processing applications. Although understanding the basic operating principles of the Transform Adaptable Processing System is more complex than is the case for a conventional programmable filter, its physical implementation is considerably simpler, since it consists of a small number of SAW chirp filters, mixers and amplifiers, and a timing generator. The capability of providing accurate transform information in real-time has been demonstrated, and prototype results for continuously variable bandpassbandstop filtering, versatile programmable matched filtering, and prewhitening for suppression of narrowband interference evidence the power of the transform processing approach to many signal processing problems. This report has described this approach in detail and demonstrated its feasibility with extensive experimental results of the prototype Transform Adaptable Processing System. Author