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:
Nov. 06, 2012
Filed:
Jun. 25, 2010
Fernando A. Mujica, Allen, TX (US);
Carson A. Wick, Atlanta, GA (US);
Lei Ding, Plano, TX (US);
Milind Borkar, Dallas, TX (US);
Roland Sperlich, Dallas, TX (US);
Fernando A. Mujica, Allen, TX (US);
Carson A. Wick, Atlanta, GA (US);
Lei Ding, Plano, TX (US);
Milind Borkar, Dallas, TX (US);
Roland Sperlich, Dallas, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
Systems and methods for identifying a transmission channel response and a feedback channel response from a plurality of composite system responses are disclosed. A plurality of shifted feedback signals are created by shifting a feedback signal frequency by a plurality of first offset values and/or by shifting a transmission signal frequency by a plurality of second offset values. The feedback signals are compared to an input signal to identify the transmission channel response and/or a feedback channel response. A control signal is generated for a pre-distortion circuit to modify the input signal by an inverse of the transmission channel response. The composite system response is measured at a plurality of operating frequencies and at the plurality of offset values. The measurements are stored in a matrix and singular value decomposition is applied to the matrix of measurements to calculate the transmission channel response and feedback channel response.