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:
Feb. 02, 2021
Filed:
Nov. 27, 2019
Texas Instruments Incorporated, Dallas, TX (US);
Sandeep Oswal, Bangalore, IN;
Visvesvaraya Pentakota, Bangalore, IN;
Jagannathan Venkataraman, Bangalore, IN;
Jaiganesh Balakrishnan, Bangalore, IN;
Francesco Dantoni, Rome, IT;
TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US);
Abstract
A transmitter for an RF communications system, that includes an auxiliary receiver for capturing transmit signal data for use in compensating/correcting transmit signal impairments (such as for DPD, QMC, LOL). The transmitter (such as Zero IF) includes analog chain elements that introduce transmit signal impairments (such as PA nonlinearities). The auxiliary receiver is configured to receive loopback transmit RF signals, and includes an RF direct sampling ADC to convert the loopback transmit RF signals to digital transmit RF signals. Digital down conversion circuitry is configured to downconvert the digital transmit RF signals to captured digital transmit baseband signals, and data capture circuitry is configured to generate the transmit signal data based on the captured digital transmit baseband signals.