Low latency frequency switching
First Claim
1. An apparatus comprising:
- a synthesizer configured to generate an output signal having a frequency in accordance with a tuning signal;
a receiver configured to process a received signal in accordance with at least two communication modes; and
a processor configured to provide the tuning signal to the synthesizer to tune the synthesizer from a first frequency corresponding to a first communication mode to a second frequency corresponding to a second communication mode and to adjust the receiver from the first communication mode to the second communication mode prior to a synthesizer settling to the second frequency.
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Abstract
Techniques for improved low latency frequency switching are disclosed. In one embodiment, a controller receives a frequency switch command and generates a frequency switch signal at a time determined in accordance with a system timer. In another embodiment, gain calibration is initiated subsequent to the frequency switch signal delayed by the expected frequency synthesizer settling time. In yet another embodiment, DC cancellation control and gain control are iterated to perform gain calibration, with signaling to control the iterations without need for processor intervention. Various other embodiments are also presented. Aspects of the embodiments disclosed may yield the benefit of reducing latency during frequency switching, allowing for increased measurements at alternate frequencies, reduced time spent on alternate frequencies, and the capacity and throughput improvements that follow from minimization of disruption of an active communication session and improved neighbor selection.
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Citations
11 Claims
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1. An apparatus comprising:
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a synthesizer configured to generate an output signal having a frequency in accordance with a tuning signal; a receiver configured to process a received signal in accordance with at least two communication modes; and a processor configured to provide the tuning signal to the synthesizer to tune the synthesizer from a first frequency corresponding to a first communication mode to a second frequency corresponding to a second communication mode and to adjust the receiver from the first communication mode to the second communication mode prior to a synthesizer settling to the second frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification