An investigation in interference suppression for HF surface wave radar

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Authors
  1. Chan, H.C.
  2. Hung, E.K.L.
Corporate Authors
Defence Research Establishment Ottawa, Ottawa ONT (CAN)
Abstract
An evaluation of the performance of the coherent sidelobe cancellation (CSLC) techniques in suppressing nightimte co-channel communications interference and ionospheric clutter in HF surface wave radars operating in coastal regions was carried out. In particular, the optimum crder of execution among the three signal processing functions: (i) Doppler processing, (ii) digital beamforming and (iii) interference cancellation was of interest, in terms of signal-to-interference-plus-noise ratio (SINR) improvement and angular accuracy. The optimum order of execution between the above mentioned operations depends on the characteristics of the interference. In terms of ionospheric clutter, there is insufficient information to arrive at definitive conclusions. A preliminary examination of the temporal, spatial and spectral characteristics of ionospheric clutter was carried out to aid in the development of mitigating algorithms.
Keywords
HFSWR (High Frequency Surface Wave Radar);SINR (Signal to Interferencs plus Noise Ratio);Doppler processing;Digital beamforming;Interference cancellation;Interference suppression;Atmospheric noise;Diurnal variation;HF noise;OTH radar;Side-Lobe Cancellation Technique;Coherent Sidelobe Canceller
Report Number
DREO-TR-2000-028 — Technical Report
Date of publication
01 Dec 1999
Number of Pages
88
DSTKIM No
CA011098
CANDIS No
514720
Format(s):
Hardcopy;Document Image stored on Optical Disk

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