SUPPRESSION OF POWER LINE HARMONIC INTERFERENCE IN HF SURFACE-WAVE RADAR

Authors
  1. Leong, H.
Corporate Authors
Defence Research Establishment Ottawa, Ottawa ONT (CAN)
Abstract
Experimental data of the Cape Bonavista High-Frequency Surface-Wave Radar (HFSWR) facility was contaminated by power line harmonics. The harmonics modulate the radar signal (mainly sea clutter) and replicate it into the Doppler spectrum. The spectral replicas distort the noise and sea clutter statistics in the signal. It is necessary to suppress them before the statistics can be obtained. A new process based on optimizations is presented for suppressing the interference. This process minimizes the spectral power of the sea clutter with respect to the amplitudes and phases of the harmonics. It is capable of removing the spectral replicas without adversely altering the statistics. This process, however, requires adequate modelling of the harmonics. A large number of parameters are required because the harmonics may have a fluctuating fundamental frequency and fluctuating amplitudes. Therefore the process can be numerically complex. TRUNCATED
Report Number
DREO-1137 — Technical Report
Date of publication
15 Oct 1992
Number of Pages
31
DSTKIM No
93-00164
CANDIS No
127401
Format(s):
Hardcopy;Originator's fiche received by DSIS

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