The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 09, 2012
Filed:
Oct. 30, 2009
Dhananjay Ashok Gore, San Diego, CA (US);
Gwendolyn Denise Barriac, Encinitas, CA (US);
James Arthur Proctor, Jr., Melbourne Beach, FL (US);
Steven J. Howard, Ashland, MA (US);
Hakan Inanoglu, Acton, MA (US);
Kenneth M. Gainey, Satellite Beach, FL (US);
Michael Mao Wang, San Diego, CA (US);
Tao Tian, San Diego, CA (US);
Dhananjay Ashok Gore, San Diego, CA (US);
Gwendolyn Denise Barriac, Encinitas, CA (US);
James Arthur Proctor, Jr., Melbourne Beach, FL (US);
Steven J. Howard, Ashland, MA (US);
Hakan Inanoglu, Acton, MA (US);
Kenneth M. Gainey, Satellite Beach, FL (US);
Michael Mao Wang, San Diego, CA (US);
Tao Tian, San Diego, CA (US);
QUALCOMM Incorporated, San Diego, CA (US);
Abstract
A wireless repeater having a receiving antenna for receiving an input signal and a transmitting antenna for transmitting an amplified signal includes first and second front-end circuits and a repeater baseband block coupled between the first and second front-end circuits. The repeater baseband block includes a channel estimation block, an echo canceller implementing time domain echo cancellation, a variable gain stage controlled by a gain control block implementing digital gain control, a first variable delay element introducing a first delay before or after the echo canceller, a second variable delay element introducing a second delay to the output signal. The delayed output signal is coupled to the channel estimation block as a reference signal for estimating the feedback channel, to the echo canceller as a reference signal for estimating the feedback signal, and to the gain control block for monitoring the stability of the repeater.