David Jacobs

US Patent:

62121332, Apr 3, 2001

Filed:

Jul 26, 1999

Appl. No.:

9/360789

Inventors:

Kim McCoy - Carmel CA
David Jacobs - San Diego CA

International Classification:

G04F 800
G04F 1000
G01S 502
H04B 7185

US Classification:

368 9

Abstract:

A new and improved low power GPS signal receiver system includes a GPS signal receiver device and control processor for powering up the signal receiver device for a first sufficient period of time to locate and acquire a time signal from a single GPS satellite and then powering down the GPS signal receiver device after establishing a local time and for waiting another sufficient period of time after receiving a user request to update time before powering up the signal receiver device to facilitate about an immediate sync on another GPS navigation message subframe indicative of the time maintained by said single GPS satellite vehicle. Once the second sufficient period of time has elapsed, the control processor powers up the GPS signal receiver device for a third sufficient period of time to acquire and process 29 bits of subframe message information indicative of time maintained by the GPS satellite vehicle. Once the time maintained by such a single GPS satellite vehicle has been obtained and processed, the control processor powers downs the GPS signal receiver device to a low power standby mode to wait for another user request to update time.

US Patent:

20210409083, Dec 30, 2021

Filed:

Jul 2, 2021

Appl. No.:

17/366251

Inventors:

- Carlsbad CA, US
David C. Jacobs - Solana Beach CA, US
David J. Trusheim - Poway CA, US
Robert T. Short - Vista CA, US

International Classification:

H04B 7/06
H04B 1/713

Abstract:

Methods, systems, and devices for channelizing and beamforming a wideband waveform are described. Generally, the described techniques provide for transmitting and receiving wideband waveforms that are beamformed on a per-channel basis during generation of the wideband waveforms. A transmitter may separate a first wideband signal into segments, with each segment bandwidth corresponding to a channel of the system bandwidth, and may map the segments to channels. The segments may be replicated to generate multiple copies of each segment. The transmitter may beamform and combine the copies of the segments to generate multiple wideband waveforms, and transmit each wideband waveform using a different antenna. A receiver may receive multiple wideband waveforms using multiple antennas and may separate each wideband waveform into segments, then beamform and de-map the segments. The techniques may be used to transmit and receive beamformed wideband waveforms over tactical data links.

US Patent:

20210258026, Aug 19, 2021

Filed:

Feb 25, 2021

Appl. No.:

17/185912

Inventors:

- Carlsbad CA, US
David C. Jacobs - Solana Beach CA, US
David J. Trusheim - Poway CA, US
Robert T. Short - Vista CA, US

Assignee:

VIASAT, INC. - Carlsbad CA

International Classification:

H04B 1/00
H04B 1/04
H04L 27/26

Abstract:

Methods, systems, and devices for channelizing a wideband waveform for transmission on a spectral band comprising unavailable channel segments are described. Generally, the described techniques provide for transmitting and receiving wideband waveforms when channels of a system bandwidth are unavailable for transmission. A transmitter may separate a first wideband signal into segments, with each segment a bandwidth corresponding to a channel of the system bandwidth, and may map the segments to the available channels. The transmitter may combine the mapped segments into a second wideband waveform and transmit the second wideband waveform using the available channels. A receiver may receive a first wideband signal waveform and may separate the first wideband signal waveform into segments, de-map the segments and combine the de-mapped segments into a second wideband waveform for demodulation. The techniques may be used to transmit and receive wideband waveforms over tactical data links.

US Patent:

20210111774, Apr 15, 2021

Filed:

Oct 10, 2019

Appl. No.:

16/598261

Inventors:

- Carlsbad CA, US
David C. Jacobs - Solana Beach CA, US
David J. Trusheim - Poway CA, US
Robert T. Short - Vista CA, US

International Classification:

H04B 7/06
H04B 1/713

Abstract:

Methods, systems, and devices for channelizing and beamforming a wideband waveform are described. Generally, the described techniques provide for transmitting and receiving wideband waveforms that are beamformed on a per-channel basis during generation of the wideband waveforms. A transmitter may separate a first wideband signal into segments, with each segment bandwidth corresponding to a channel of the system bandwidth, and may map the segments to channels. The segments may be replicated to generate multiple copies of each segment. The transmitter may beamform and combine the copies of the segments to generate multiple wideband waveforms, and transmit each wideband waveform using a different antenna. A receiver may receive multiple wideband waveforms using multiple antennas and may separate each wideband waveform into segments, then beamform and de-map the segments. The techniques may be used to transmit and receive beamformed wideband waveforms over tactical data links.