Neal R Anderson

US Patent:

54886627, Jan 30, 1996

Filed:

Mar 10, 1994

Appl. No.:

8/209657

Inventors:

Thomas M. Fox - Gilbert AZ
Neal R. Anderson - Mesa AZ
Julius A. Heeren - Phoenix AZ

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04K 110

US Classification:

380 34

Abstract:

A transmitter (12) broadcasts a PN encoded message (16). A receiver (14) includes a SAW correlator (38) configured to autocorrelate with the PN sequence used in the broadcast signal. A preamble of the message (16) conveys two successive bits (18) that are each encoded with the PN sequence. After the correlator (38) has been preloaded with the PN sequence from the first bit (18), its non-correlation output exhibits reduced amplitude time sidelobes. A timing comparison circuit (60) compares a correlation signal (46) with a timing threshold (72). The timing threshold (72) is established at a very low level to minimize the influence of multipath. False triggering on noise is prevented by disabling the timing comparison circuit (60) until after the first bit (18). At this point in time the correlator (38) has been preloaded with its PN sequence, is again being loaded with its PN sequence, and outputs reduced amplitude time sidelobes.

US Patent:

58942858, Apr 13, 1999

Filed:

Aug 29, 1997

Appl. No.:

8/929334

Inventors:

David Moon Yee - Scottsdale AZ
Neal Robert Anderson - Mesa AZ
Robert Henry Bickley - Paradise Valley AZ
James Harvey Fleming - Phoenix AZ

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

G01S 502
H04B 7185

US Classification:

342357

Abstract:

A sensor apparatus to sense when an aircraft pilot has ejected is provided for safe actuation of a rescue locator radio. The ejection sensor apparatus (20) has a microphone (40), an accelerometer (35) and logic for determining that a pilot ejection event has occurred. The microphone (40) detects the differences in sound level (30) from normal cockpit noise to those during ejection and after deployment of a rescue chute. The accelerometer (35) detects the differences in acceleration level (25) during ejection and after deployment of a rescue chute. Pre-programmed acceptance templates (55) are compared in a digital processor (60) to ensure that ejection has occurred before a rescue radio (90) is activated. A manual turn on delay or turn off capability for the rescue radio is provided for facilitation of communications. Encrypted GPS location information and a pilot code are also included in the rescue radio transmission.

US Patent:

54694094, Nov 21, 1995

Filed:

Mar 14, 1994

Appl. No.:

8/212480

Inventors:

Neal R. Anderson - Mesa AZ
Bart J. Erickson - Scottsdale AZ
Keith Leung - Chandler AZ

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

G04B 4700
G04F 500
G01S 302

US Classification:

368 10

Abstract:

Timing signals are transmitted from reference transmitters through antenna/receivers (antenna preamplifier nodes) to collector nodes (C-Nodes) and to a central computer. The times of arrival of the signals at the various C-Nodes are measured by the C-Nodes, relative to each C-Node's clock. The time of arrival signals at each C-Node must be based upon a common time reference to be useful for positioning. Therefore, the central computer determines the offsets of clocks relative to a selected reference C-Node clock. The time of arrival signals are then calibrated against one another and used to adjust the time of arrival signals so that all time-of-arrivals are relative to the same reference and can be used for position determination and the clocks of the collection nodes are effectively synchronized.

US Patent:

55348769, Jul 9, 1996

Filed:

Mar 10, 1994

Appl. No.:

8/209171

Inventors:

Bart J. Erickson - Scottsdale AZ
Neal R. Anderson - Mesa AZ

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

G01S 124

US Classification:

342387

Abstract:

A multilateration location system (12) includes a locatable unit (16) and any number of known-position locators (14). A time of arrival detector (22) determines instants in time when a location signal (20) transmitted by the locatable unit (16) arrives at various known-position locators (14). For each combination of two known-position locators (14) that receive the location signal (20), a pre-estimation process (32) determines whether the difference in arrival times is less than or equal to a maximum propagation duration for the locator pair. The maximum propagation duration is based upon the distance between the locators (14) in the locator pair. If the difference is greater than the maximum propagation duration, the difference is omitted from the data set processed by a multilateration calculation process (34). A post estimation filtering process (36) screens out location estimates that are too distant from a predicted position.

US Patent:

50146211, May 14, 1991

Filed:

Apr 30, 1990

Appl. No.:

7/516404

Inventors:

Thomas M. Fox - Gilbert AZ
Neal R. Anderson - Mesa AZ

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

F42C 1302
F41G 726

US Classification:

102213

Abstract:

An optical target detector utilizes a star coupler to achieve automatic alignment of "pencil" laser beams. A number of "pencil" beams of laser light are deployed from the surface of a projectile in order to detect a target. The laser light is transmitted to the target and reflected back from the target to the optical target detector. The light tramsmitted, in the form of a number of "pencil" beams, and the light being reflected by the target are transmitted through a star coupler device in order to maintain alignment for the transmission of maximum light signal strength and simultaneously to minimize aerosol backscatter.

US Patent:

50023470, Mar 26, 1991

Filed:

Aug 25, 1989

Appl. No.:

7/398570

Inventors:

Neal R. Anderson - Mesa AZ
James C. Peterson - Mesa AZ

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

F21V 906

US Classification:

350 14

Abstract:

A spectral filter for use in optical systems receiving field-of-view (FOV) optical beams at differing angles refracts all FOV beams onto a single plane focal surface. The spectral filter comprises a combination of lens having varied thicknesses incorporated into a single filter unit. Each thickness, or step, of the spectral filter corresponds to a different one of the received FOV beams.