Multi-Frequency Quadrature Signal Correction Method
RFT-46
The multi-frequency system enables a signal processing system to determine vector mismatches between numerous signal paths. By broadcasting a multi-tone, multi-frequency calibration signal and comparing it to an ideal waveform mathematically generated in the receiver, the method can detect mismatches across multiple frequencies, distinguishing it from conventional mismatch determination systems. Periodic calibration signals are used to adapt the system performance dynamically, allowing the correction of time-varying mismatch errors. This multi-frequency detection and correction improves signal quality and reliability, and includes assessments of in-phase and quadrature signal paths, as well as vector mismatch between array elements. The system includes the capability of test signal injection at the RF (Radio Frequency) stage, which allows the detection and correction of mismatch in RF-to-IF (Intermediate Frequency) components.
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File: rft-46.pdf
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