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:
Jan. 13, 2026
Filed:
Sep. 21, 2023
Qualcomm Incorporated, San Diego, CA (US);
Cheng-Han Wang, San Jose, CA (US);
Varun Amar Reddy, San Diego, CA (US);
Qi Zhou, Milpitas, CA (US);
Hsin-Hsu Chen, Santa Clara, CA (US);
Liang Zhao, Saratoga, CA (US);
Koorosh Akhavan, San Diego, CA (US);
Yi Zeng, San Jose, CA (US);
Chan Hong Park, San Jose, CA (US);
Le Nguyen Luong, San Diego, CA (US);
QUALCOMM Incorporated, San Diego, CA (US);
Abstract
A system for radio frequency (RF) residual sideband (RSB) calibration includes a complex (in phase/quadrature (I/Q)) signal receiver, a signal generator configured to generate a transmit (Tx) signal, a first phase shifter operably coupled to the real signal transmitter, a first signal combiner configured to combine a receive (Rx) signal with the transmit (Tx) signal to generate a first combined signal, a second phase shifter configured to provide a selected phase shift to the first combined signal, and a complex downconverter configured to generate an in phase Rx signal and a quadrature Rx signal alternatively using an in phase LO signal and a quadrature LO signal to generate one or more signals indicative of relative Tx-Rx LO phase (θ), amplitude (A), Tx LO I/Q phase mismatch (ε), Rx I/Q amplitude mismatch (α), and Rx I/Q phase mismatch (φ) at the output of the complex receiver.