| 摘要 |
A wireless receiver (100) demodulates a frequency modulated RF signal by a direct conversion procedure, including channels (110, 112) for producing in-phase and quadrature components. A processor (123, 133) periodically estimates an error in at least one of the in-phase and quadrature phase components and produces an adjustment signal of at least one of the in-phase and quadrature components to compensate for the detected error. The processor is operable to apply alternatively different procedures to estimate the error. The procedures including a first procedure applied when a signal quality value of the received RF signal is above a threshold value and a second procedure applied when a signal quality value of the RF received signal is not above the threshold value. Also described is a method (300) of operation of the receiver. The error may be a DC offset, phase and/or amplitude error. |
