US Patent Issued to Apple on Sept. 16 for "Localized IQ mismatch measurement and compensation systems and methods" (German Inventor)

ALEXANDRIA, Va., Sept. 17 -- United States Patent no. 12,418,298, issued on Sept. 16, was assigned to Apple Inc. (Cupertino, Calif.).

"Localized IQ mismatch measurement and compensation systems and methods" was invented by Antonio Passamani (Munich).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure relates to quadrature (IQ) signal mismatch in RFDACs. IQ mismatch is a non-ideality which occurs whenever I and Q vectors deployed to modulate the phase and the amplitude of RFDAC output signals are not aligned to be offset 90 degrees between each other. IQ mismatch may result in EVM degradation, and may be especially problematic for the RFDAC architecture because the RFDAC operates its digital-...