Clutter rejection in a passive radar receiver of OFDM...

Details Clutter rejection in a passive radar receiver of OFDM... Clutter rejection in a passive radar receiver of OFDM...

2006-02-14

2006-02-14

Pihulic, Daniel (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Clutter elimination

C342S162000, C342S163000, C342S107000, C342S108000, C342S148000, C342S189000, C342S192000

Reexamination Certificate

active

06999025

ABSTRACT:
The invention concerns a passive radar receiver with an array of antennas for a OFDM received signal comprising frames of symbols each emitted on coded orthogonal carriers. After formatting received signals into digital symbols, dummy signals from dummy OFDM emitters at different distances from and in different directions relative to the receiver are generated and added to the signals picked up by the antennas. The modified received signals are filtered by means of inverse covariance matrices in order to eliminate at least unwanted zero Doppler effect signals and to provide an isotropic reception diagram without blind sector of direct path being generated and by detecting mobile targets along the direct path.

REFERENCES:
patent: 6525686 (2003-02-01), Haruta et al.
patent: 2004/0257270 (2004-12-01), Poullin
patent: 2 719 382 (1995-11-01), None
patent: 2 776 438 (1999-09-01), None
patent: 2 820 507 (2002-08-01), None

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