Symmetrical Number System Phase Sampled Interferometer Direction Finding Antennas
NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
Pagination or Media Count:
A novel phase sampled interferometer Direction Finding DF antenna architecture is described. Based on the optimum symmetrical number system OSNS the analog spatial filtering operation is broken down into a number of parallel sub operations moduli that are of smaller complexity. One two-element interferometer is used for each sub operation and only requires a precision in accordance with its modulus. A much higher spatial resolution is achieved after the different OSNS moduli are used and the filtering results of these low precision sub operations are recombined. The use of the symmetrically folding phase waveform provides for a straight forward implementation of a high resolution DF antenna. Simulated and experimental results are shown to numerically evaluate the feasibility of the design. Spatial encoding errors that may occur due to the angle-of-arrival being located about a code transition point are also quantified.
- Electrical and Electronic Equipment
- Numerical Mathematics
- Direction Finding