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:
Aug. 20, 2019
Filed:
Jul. 28, 2017
Texas Instruments Incorporated, Dallas, TX (US);
TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US);
Abstract
A zero-IF transceiver includes a Rx having an IQ receiver path with a digital portion including a modem and a down-converter, and a Tx having an IQ transmit path with a digital portion including a modem for generating a complex and substantially balanced time-domain signal, an IQMM correction block, and an up-converter. An IQMM estimation block is coupled between time-domain parts of the Rx and the Tx modems. The IQMM estimation block is coupled to an input of the IQMM correction block. A loopback path couples the time-domain signal from the Tx to the Rx. The IQMM estimation block receives a first time-domain signal from the Rx modem and the time-domain signal before the IQMM correction block, and estimates in a digital time-domain an IMage Rejection Ratio (IMRR) of the Tx(ϑ). The IQMM correction block is for correcting the IQMM to provide an IQ corrected OFDM signal using the ϑ.