Wavenumber support regions for arbitrary arrays
Abstract
A procedure for defining the region of wavenumber support relevant for maximum entropy spectral estimation of a noise field incident on a planar array is set out. Linear, nonequispaced arrays are first considered, and it is argued that the problem of defining a region of wavenumber support is only well-posed when either position uncertainty for the array elements is postulated, or phase uncertainty in the measurement of the signals at the array elements is postulated, or if one acknowledges that a polar diagram that is almost periodic defines an aliasing frequency in virtually the same way as a polar diagram which is periodic. For planar arrays, the region of wavenumber support can be approximately circular but in general has to be defined with reference to the particular array.
- Publication:
-
Circuits Systems and Signal Processing
- Pub Date:
- 1985
- Bibcode:
- 1985CSSP....4..439A
- Keywords:
-
- Antenna Arrays;
- Antenna Radiation Patterns;
- Maximum Entropy Method;
- Support Interference;
- Wave Attenuation;
- Periodic Variations;
- Phased Arrays;
- Wave Fronts;
- Wavelengths;
- White Noise;
- Communications and Radar