The signal ambiguity function is derived and analyzed for radar (sonar) systems employing array antennas. It is shown that angle resolution is essentially independent of range-Doppler resolution in the main antenna beam and that the antenna directivity function can have a strong effect on waveform design. It is also shown that angle ambiguity is appreciably influenced by signal bandwidth; in particular, signal bandwidth can be traded for a reduction in angle ambiguity in an array whose element spacing is greater than one-half wavelength.
Published in:
Military Electronics, IEEE Transactions on
(Volume:9
,
Issue:
3
)
Date of Publication: July 1965