Neil D Fox

US Patent:

6437741, Aug 20, 2002

Filed:

Jan 10, 2001

Appl. No.:

09/756674

Inventors:

Neil David Fox - Fairfax VA

Assignee:

ITT Manufacturing Enterprises, Inc. - Wilmington DE

International Classification:

G01S 502

US Classification:

342417

Abstract:

A direction finder apparatus and method are provided. The direction finder apparatus includes an antenna system, a RF front end, and an analog signal detector that detects an electromagnetic signal and provides in response a characteristic signal without an underlying carrier wave. The direction finder apparatus further includes an analog-to-digital (A/D) converter, a fast Fourier transform (FFT) processor that produces a plurality of component frequency approximations representing frequency components of the AM signal, a plurality of storage bins, and a post-processor. The post-processor determines a maximum S/N ratio from among the plurality of component frequency approximations. A direction of arrival (DOA) angle of the RF signal is determined when the antenna system is oriented to produce a maximum S/N ratio.

US Patent:

6469657, Oct 22, 2002

Filed:

Oct 10, 2001

Appl. No.:

09/972874

Inventors:

Neil David Fox - Fairfax VA

Assignee:

ITT Manufacturing Enterprises, Inc. - Wilmington DE

International Classification:

G01S 1342

US Classification:

342147, 342196, 342417, 342418, 342 21

Abstract:

A radio direction finding system for a low signal quality transmission signal performs a Fast Fourier Transform (FFT) on an entire received RF band into a number of FFT bins, each serving as an IF filter. The contents of each FFT bin are demodulated to decode a frequency signature from the encoded RF signal. A signal-to-noise ratio comparator receives the FFT baseband samples and determines the signal level from the known frequency signature. The FFT baseband buffer with the greatest SNR corresponding to a particular FFT frequency bin is outputted as a direction finding metric.

Address:

5502 Greenshank Ct, Fairfax, VA 22032

Phone:

703 250-6487

VIN:

5TDZK23C58S131064

Make:

TOYOTA

Model:

SIENNA

Year:

2008

Address:

5502 Greenshank Ct, Fairfax, VA 22032

VIN:

2T1KR32E97C677914

Make:

TOYOTA

Model:

MATRIX

Year:

2007