Preprocessors based on focusing broadband signals to achieve a rank-one direction vector for each broadband source are designed both in the frequency and time domains. The preprocessor is then followed by any of the frequency-independent beamforming techniques. The merits that result as a consequence are partial adaptivity due to frequency-independent weights and decoherence of coherent signals, thus combating signal cancellation. In addition, robustness against lock-direction pointing errors can be incorporated into the preprocessor design. Expressions for the desired-signal distortion in the single interference case are derived and analyzed. Simulation results confirm the utility of the focusing preprocessors.
|Original language||English (US)|
|Number of pages||5|
|Journal||Conference Record - Asilomar Conference on Circuits, Systems & Computers|
|State||Published - Dec 1 1991|
|Event||24th Asilomar Conference on Signals, Systems and Computers Part 2 (of 2) - Pacific Grove, CA, USA|
Duration: Nov 5 1990 → Nov 7 1990