Research on Algorithms for Adaptive Array Antennas.
Interim rept. Feb 81-Feb 82,
STANFORD UNIV CA DEPT OF ELECTRICAL ENGINEERING
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This report demonstrates a method for implementing a wide-band constrained array processor using filters possessing both poles and zeros. The idea of constrained array processing is introduced and an optimal array weighting formula is derived. This optimal weighting is meant to cancel m-1 wide-band interference sources incident on an m-element array with a constrained look direction. From the optimal weighting formula, it becomes evident that the use of filters possessing both poles and zeros to perform the frequency-dependent weighting has the potential for improving the wide-band nulling capability of the array. A novel method for adapting the pole-zero array filters in tap-delay-line form using the LMS or RLS algorithm is presented. The issue of look-direction signal bias and stability of the inverse filter are addressed. Author
- Electrical and Electronic Equipment
- Theoretical Mathematics
- Radiofrequency Wave Propagation