InterDigital Inc (IDCC)

[Gamco]

United States Patent 9,490,764
Ferrante , et al. November 8, 2016

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:
1000002219220

Appl. No.:
14/689,615

Filed:
April 17, 2015


Prior Publication Data






Document Identifier

Publication Date

US 20150303960 A1 Oct 22, 2015



Related U.S. Patent Documents









Application Number

Filing Date

Patent Number

Issue Date

61981002 Apr 17, 2014




Current U.S. Class: 1/1
Current CPC Class: H03G 3/3042 (20130101); H03G 3/3078 (20130101); H04B 1/1027 (20130101)
Current International Class: H04B 1/16 (20060101); H04B 1/10 (20060101); H03G 3/30 (20060101); H04B 1/28 (20060101)

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