Method and system for power control of a wireless communication device
View Patent ↗According to the present disclosure, a method for tracking power levels of a wireless communications signal comprises receiving a feedback signal indicative of a power level of a wireless communication signal associated transmitted from a transmit path to an antenna of a wireless communication element. The method further comprises receiving a reference signal associated with a digital signal converted into the wireless communication signal. Additionally, the method comprises determining a gain of the feedback signal with respect to the reference signal and determining a gain error based on the determined gain and an expected gain.
1. A wireless communication element comprising:
a transmit path configured to convert a digital signal into a wireless communication signal;
an antenna coupled to the transmit path and configured to transmit the wireless communication signal;
a feedback receive path communicatively coupled between the antenna and transmit path and configured to receive a feedback signal indicative of a power level of the wireless communication signal transmitted from the transmit path to the antenna; and
an error tracking path coupled to the feedback receive path, the error tracking path configured to:
receive the feedback signal;
compensate for a gain imbalance between an I channel component and a Q channel component of the feedback signal such that the gain of the I channel component and the gain of the Q channel component are approximately equal;
compensate for a phase imbalance between the I channel component and the Q channel component of the feedback signal such that the I channel component and the Q channel component are in approximately quadrature phase with each other;
receive a reference signal associated with the digital signal;
determine a gain of the feedback signal with respect to the reference signal;
determine a gain error based on the determined gain and an expected gain; and
detect interference associated with the wireless communication signal based on an unexpected change in a magnitude of the feedback signal and a corresponding change in a difference between the feedback signal and the reference signal multiplied by the determined gain.
2. The wireless communication element of claim 1 , the error tracking path configured to time align the feedback signal with the reference signal.
3. The wireless communication element of claim 2 , the error tracking path configured to time align the feedback signal with the reference signal based on a delay between the reference signal and the feedback signal, the delay determined using an adaptive error tracking algorithm.
4. The wireless communication element of claim 1 , the error tracking path configured to determine the gain of the feedback signal using an adaptive error tracking algorithm.
5. The wireless communication element of claim 4 , the adaptive error tracking algorithm comprising at least one of a least mean squares algorithm and a recursive least squares algorithm.
6. The wireless communication element of claim 1 , the transmit path further configured to adjust a power level of the wireless communication signal based on the gain error.
7. The wireless communication element of claim 1 , the error tracking path further configured to adjust the feedback signal to compensate for frequency gain droop associated with the feedback signal.
8. A method for tracking power levels of a wireless communications signal comprising:
receiving a feedback signal indicative of a power level of a wireless communication signal associated transmitted from a transmit path to an antenna of a wireless communication element;
compensating for a gain imbalance between an I channel component and a Q channel component of the feedback signal such that the gain of the I channel component and the gain of the Q channel component are approximately equal;
compensating for a phase imbalance between the I channel component and the Q channel component of the feedback signal such that the I channel component and the Q channel component are in approximately quadrature phase with each other;
receiving a reference signal associated with a digital signal converted into the wireless communication signal;
determining a gain of the feedback signal with respect to the reference signal;
determining a gain error based on the determined gain and an expected gain; and
detecting interference associated with the wireless communication signal based on an unexpected change in a magnitude of the feedback signal and a corresponding change in a difference between the feedback signal and the reference signal multiplied by the determined gain.
9. The method of claim 8 , further comprising time aligning the feedback signal with the reference signal.
10. The method of claim 9 , further comprising:
determining a delay between the reference signal and the feedback signal using an adaptive error tracking algorithm; and
time aligning the feedback signal with the reference signal based on the determined delay.
11. The method of claim 8 , further comprising determining the gain of the feedback signal using an adaptive error tracking algorithm.
12. The method of claim 11 , the adaptive error tracking algorithm comprising at least one of a least mean squares algorithm and a recursive least squares algorithm.
13. The method of claim 8 , further comprising adjusting a power level of the wireless communication signal based on the gain error.
14. The method of claim 8 , further comprising adjusting the feedback signal to compensate for frequency gain droop associated with the feedback signal.