InterDigital Inc (IDCC)

[Gamco]

United States Patent 9,742,371
Ferrante , et al. August 22, 2017
Fast automatic gain control (AGC) for packet based systems

Abstract
A method and apparatus for use in a packet based wireless communication system for reducing automatic gain control (AGC) convergence time at a receiver are described. A radio frequency (RF) signal is received. The RF signal includes a sequence of a plurality of pre-defined power levels at a beginning of a preamble of the RF signal. Statistics for each of the plurality of pre-defined power levels at the beginning of the preamble of the RF signal are computed. An appropriate gain for a variable gain amplifier (VGA) is then computed based on the computed statistics for each of the plurality of pre-defined power levels and a-priori information related to transmission power differences between the plurality of pre-defined power levels of the sequence.

Inventors: Ferrante; Steven (Doylestown, PA), Pietraski; Philip J. (Jericho, NY)
Applicant:
Name City State Country Type

INTERDIGITAL PATENT HOLDINGS, INC.
Wilmington
DE
US
Assignee: InterDigital Patent Holdings, Inc. (Wilmington, DE)
Family ID: 1000002788139
Appl. No.: 15/290,184
Filed: October 11, 2016
Prior Publication Data
Document Identifier Publication Date
US 20170033751 A1 Feb 2, 2017
Related U.S. Patent Documents
Application Number Filing Date Patent Number Issue Date
14689615 Apr 17, 2015 9490764
61981002 Apr 17, 2014
Current U.S. Class: 1/1
Current CPC Class: H03G 3/20 (20130101); H03G 3/3042 (20130101); H03G 3/3078 (20130101); H04B 1/1027 (20130101)
Current International Class: H03G 3/20 (20060101); H04B 1/10 (20060101); H03G 3/30 (20060101)
Field of Search: ;375/316,345 ;370/310 ;455/226.1,232.1,234.1,234.2,239.1,240.1

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