Wireless Transceiver Calibration for Internal Signal Leakage Offset

The patent segments the signal path into distinct components: the desired coupled signal path and the unwanted leakage paths. By introducing separate leakage compensation circuits for each leakage source (amplifier leakages and package pin leakages), the system can independently characterize and compensate for each segmentation, thereby maintaining estimation accuracy while using the low-cost coupled signal reception method.

The patent introduces intermediary leakage compensation circuits that act as mediators between the contaminated reception signal and the DPD coefficient estimation process. These intermediary circuits generate compensation signals that represent the leakage components, which are then subtracted from the received signal to produce a cleaned estimation signal, thus enabling accurate coefficient estimation despite the presence of leakage.

The patent applies preliminary anti-action by proactively characterizing the leakage paths before they interfere with normal operation. During calibration mode, the system pre-determines the leakage characteristics by intentionally generating test signals and measuring their leakage components. This preliminary characterization enables the system to pre-compute compensation signals that counteract the leakage effects during subsequent high-power transmission operations.

The patent converts the harmful leakage effect into a beneficial calibration opportunity. By deliberately injecting test signals and measuring the resulting leakage through the same paths that cause interference during operation, the system transforms the leakage problem into a source of calibration data. The measured leakage characteristics are then used to generate compensation signals that eliminate the harmful effect during actual transmission.