Systems and methods to dynamically calibrate and adjust gains in a direct conversion receiver
First Claim
1. A method comprising:
- detecting gain adjustment indicators in a receiver system;
evaluating the gain adjustment indicators and taking a highest priority transition to another state in the receiver system when transition conditions based on the gain adjustment indicators are met for transitioning to at least two different states with different priorities in the receiver system, wherein different ones of the gain adjustment indicators are evaluated depending on a current state in the receiver system being a fast automatic gain control (AGC) state or a slow AGC state;
applying one or more gain control signals to one or more gain elements of the receiver system according to the current state of the receiver system, whereinthe applying one or more gain control signals results in a gain change to the receiver system;
in response to the gain change, determining whether the receiver system exhibits a DC (direct current) offset; and
in response to a determination that the receiver system exhibits the DC offset, applying one or more DC offset correction control signals to the one or more gain elements of the receiver system, wherein the one or more DC offset correction signals are configured to correct the DC offset.
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Accused Products
Abstract
Method embodiments are provided herein for dynamically calibrating and adjusting a direct conversion receiver system. One embodiment includes applying one or more gain control signals to one or more gain elements of a receiver system, where the applying one or more gain control signals results in a gain change to the receiver system; in response to the gain change, determining whether the receiver system exhibits a DC (direct conversion) offset; and in response to a determination that the receiver system exhibits the DC offset, applying one or more DC offset correction control signals to one or more gain elements of the receiver system, where the one or more DC offset correction signals are configured to correct the DC offset.
51 Citations
20 Claims
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1. A method comprising:
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detecting gain adjustment indicators in a receiver system; evaluating the gain adjustment indicators and taking a highest priority transition to another state in the receiver system when transition conditions based on the gain adjustment indicators are met for transitioning to at least two different states with different priorities in the receiver system, wherein different ones of the gain adjustment indicators are evaluated depending on a current state in the receiver system being a fast automatic gain control (AGC) state or a slow AGC state; applying one or more gain control signals to one or more gain elements of the receiver system according to the current state of the receiver system, wherein the applying one or more gain control signals results in a gain change to the receiver system; in response to the gain change, determining whether the receiver system exhibits a DC (direct current) offset; and in response to a determination that the receiver system exhibits the DC offset, applying one or more DC offset correction control signals to the one or more gain elements of the receiver system, wherein the one or more DC offset correction signals are configured to correct the DC offset. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method comprising:
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detecting gain adjustment indicators in a receiver system; evaluating the gain adjustment indicators and taking a highest priority transition to another state in the receiver system when transition conditions based on the gain adjustment indicators are met for transitioning to at least two different states with different priorities in the receiver system, wherein different ones of the gain adjustment indicators are evaluated depending on a current state of the receiver system being a fast automatic gain control (AGC) state or a slow AGC state; applying a first gain profile to the receiver system according to the current state of the receiver system, wherein the first gain profile comprises one or more gain control signals, each of the one or more gain control signals corresponds to a respective gain element of one or more gain elements of the receiver system, and the one or more gain control signals implement a present gain setting of the receiver system; detecting whether the present gain setting of the receiver system requires a gain adjustment within a monitoring time, wherein the monitoring time begins in response to the applying the first gain profile; in response to a detection that the present gain setting does not require the gain adjustment within the monitoring time, determining whether the receiver system exhibits a DC offset; and in response to a determination that the receiver system exhibits the DC offset, applying one or more DC offset correction signals to the one or more gain elements of the receiver system, wherein the one or more DC offset correction signals are configured to correct the DC offset. - View Dependent Claims (10, 11, 12, 13)
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14. A method comprising:
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detecting gain adjustment indicators in a receiver system; evaluating the gain adjustment indicators and taking a highest priority transition to another state in the receiver system when transition conditions based on the gain adjustment indicators are met for transitioning to at least two different states with different priorities in the receiver system, wherein different ones of the gain adjustment indicators are evaluated depending on a current state of the receiver system being a fast automatic gain control (AGC) state or a slow AGC state; monitoring the receiver system to determine whether a present gain setting of the receiver system requires any gain adjustments, wherein the present gain setting is implemented by a plurality of gain control signals, and each of the plurality of gain control signals is received by one of a plurality of gain elements of the receiver system; when the present gain setting of the receiver system requires adjustment, adjusting the present gain setting according to the current state of the receiver system; in response to a gain adjustment made to the present gain setting, determining whether the receiver system exhibits a DC (direct current) offset; and in response to a determination that the receiver system exhibits the DC offset, applying one or more DC offset correction control signals to the plurality of gain elements of the receiver system, wherein the one or more DC offset correction control signals are configured to correct the DC offset. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification