Srivatsan Veeraraghavan

US Patent:

20070135160, Jun 14, 2007

Filed:

Nov 30, 2005

Appl. No.:

11/291458

Inventors:

Jorge Fabrega-Sanchez - San Diego CA, US
Henry Chang - San Diego CA, US
Srivatsan Veeraraghavan - San Diego CA, US
Ammar Kitabi - San Diego CA, US

International Classification:

H04B 1/04
H04B 1/18
H04M 1/00

US Classification:

455553100, 455121000, 455193100

Abstract:

A system and method is provided for tuning a Global Positioning System (GPS) antenna matching circuit in a portable wireless communications device. The method includes accepting a first matching circuit tuning value, measuring satellite vehicle (SV) carrier-to-noise ratio (C/N) associated with the first tuning value and a first search time interval, measuring the SV C/N associated with a next tuning value, and selecting the tuning value associated with the highest SV C/N to tune the matching circuit. In one aspect, the method further includes comparing the SV C/N to a first minimum threshold. If the first tuning value SV C/N exceeds the first minimum threshold, then the method measures the SV C/N associated with the next tuning value. Otherwise, a default tuning value can be selected to tune the matching circuit.

US Patent:

20140378088, Dec 25, 2014

Filed:

Jun 25, 2013

Appl. No.:

13/926788

Inventors:

- San Diego CA, US
Srivatsan Veeraraghavan - San Diego CA, US

International Classification:

F41A 17/06
H04M 1/02
H04W 4/02
H04M 11/04

US Classification:

4554042

Abstract:

Methods, systems, and devices for tracking firearms in a wireless communication system may include a firearm configured to send sensor data to a non-recording telephone device via a telephone call to enable a CALEA server to intercept the data via a wiretap. The firearm may include various sensors that collect data about the firearm's location, use, remaining ammo, and any other information regarding its surroundings, which may be sent via the telephone call. A CALEA server may store the firearm data obtained via the wiretap.