Systems and methods for integrating cellular and location detection functionality using a single crystal oscillator

Patent metadata

Field	Value
Publication number	US-8934853-B2
Application number	US-201213492311-A
Country	US
Kind code	B2
Filing date	Jun 8, 2012
Priority date	Jun 8, 2011
Publication date	Jan 13, 2015
Grant date	Jan 13, 2015

Abstract

Embodiments of the present disclosure use shared oscillator for cellular communications and location detection in a communication device. The communications device estimates a frequency offset of one of its subsystems. The communications device determines a frequency offset that results from drifting of this shared oscillator, typically caused by aging and/or changes in temperature, voltage, humidity, pressure, and/or vibration to provide some examples, from the frequency offset this subsystem. The communications device provides various compensation parameters to its various subsystems to compensate for the frequency offset that results from drifting of the oscillator.

First claim

What is claimed is:

1. An apparatus, comprising:
an oscillator configured to provide a reference signal that is characterized as having a reference frequency that is subject to a variation in frequency over time;
a first subsystem coupled to the oscillator, wherein the first subsystem comprises a first phase locked loop, (PLL), and wherein the first subsystem is configured to process a first communication signal using the reference signal;
a second subsystem coupled to the osc…

Assignees

• Lorenz Robert
• Medapalli Kamesh
• Van Diggelen Frank
• Abraham Charlie
• Broadcom Corp

Inventors

• Lorenz Robert
• Medapalli Kamesh
• Van Diggelen Frank
• Abraham Charlie

Classifications

• H04B1/406

  Electricity · mapped topic

• H04B1/3805

  Electricity · mapped topic

• H04W4/02 Primary

  Electricity · mapped topic

• H04B1/16

  Electricity · mapped topic

• G01S19/23

  Physics · mapped topic