Title :
Enhancement of the angular resolution of radar antennas by diagram spreading
Author :
Löhner, A. ; Baier, P.W. ; Thomas, R.
Author_Institution :
Res. Group for RF Commun., Kaiserslautern Univ., Germany
Abstract :
In monostatic radar systems, in which the same directive antenna is used for both transmission and reception, the angular resolution is limited by the restricted aperture width of the antenna. It is shown that, for a given aperture width, angular resolution can be maximized by employing linear optimum estimation (LOE). Specific aperture illuminations are proposed, by which the SNR degradation encountered when using LOE is kept low. These illuminations lead to an angular spread of the radiation pattern, which is analogous to spectrum spreading in spread spectrum communications
Keywords :
antenna radiation patterns; directive antennas; filtering theory; matched filters; radar antennas; radar signal processing; receiving antennas; signal resolution; spread spectrum radar; transmitting antennas; SNR degradation; angular resolution; aperture illuminations; aperture width; diagram spreading; directive antenna; linear optimum estimation; matched filtering; monostatic radar systems; pulse compression radar; radar antennas; radiation pattern; reception; spectrum spreading; spread spectrum communications; transmission; Antenna radiation patterns; Aperture antennas; Degradation; Directive antennas; Fourier transforms; Lighting; Radar antennas; Radio frequency; Spread spectrum radar; Transmitting antennas;
Conference_Titel :
Spread Spectrum Techniques and Applications Proceedings, 1996., IEEE 4th International Symposium on
Conference_Location :
Mainz
Print_ISBN :
0-7803-3567-8
DOI :
10.1109/ISSSTA.1996.563251
