Global positioning system receiver with phase offset compensation
First Claim
1. An electronic device, comprising:
- adjustable radio-frequency circuitry and antenna structures that are operable in a plurality of different modes;
radio-frequency transceiver circuitry that transmits and receives radio-frequency signals through the adjustable radio-frequency circuitry and antenna structures; and
satellite navigation system receiver circuitry that receives satellite navigation signals through the adjustable radio-frequency circuitry and antenna structures, wherein a phase offset is imposed on the received satellite navigation signals by the adjustable radio-frequency circuitry and antenna structures when switching between the different modes and wherein the satellite navigation system receiver circuitry uses at least one compensating phase offset value to compensate the received satellite navigation system signals for the imposed phase offset, and wherein the satellite navigation system receiver circuitry includes a multiplexer having a plurality of inputs and an output and further includes a plurality of storage elements each of which provides a respective compensating phase offset value to a respective one of the plurality of inputs.
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Accused Products
Abstract
An electronic device such as a cellular telephone may include transceiver circuitry for handling wireless communications. The transceiver circuitry may include a transceiver such as a cellular telephone transceiver or a wireless local area network receiver and may include a satellite positioning system receiver. Radio-frequency circuitry may be used to couple the transceiver circuitry to antenna structures. When operating the transceiver in different modes of operation, the radio-frequency circuitry may be adjusted to optimize performance. Adjustments to the radio-frequency circuitry may impose phase offsets on satellite positioning system signals that are received through the antenna structures and radio-frequency circuitry. These phase offsets which would otherwise cause degradation in the satellite positioning system receiver can be compensated by applying stored compensating phase offset values to the satellite positioning system receiver during operation.
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Citations
21 Claims
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1. An electronic device, comprising:
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adjustable radio-frequency circuitry and antenna structures that are operable in a plurality of different modes; radio-frequency transceiver circuitry that transmits and receives radio-frequency signals through the adjustable radio-frequency circuitry and antenna structures; and satellite navigation system receiver circuitry that receives satellite navigation signals through the adjustable radio-frequency circuitry and antenna structures, wherein a phase offset is imposed on the received satellite navigation signals by the adjustable radio-frequency circuitry and antenna structures when switching between the different modes and wherein the satellite navigation system receiver circuitry uses at least one compensating phase offset value to compensate the received satellite navigation system signals for the imposed phase offset, and wherein the satellite navigation system receiver circuitry includes a multiplexer having a plurality of inputs and an output and further includes a plurality of storage elements each of which provides a respective compensating phase offset value to a respective one of the plurality of inputs. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for operating an electronic device that includes an antenna structure, transceiver circuitry that includes a satellite navigation system receiver that receives satellite navigation system signals, and adjustable radio-frequency circuitry interposed between the antenna structure and the transceiver circuitry, comprising:
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storing calibration settings in the satellite navigation system receiver wherein each calibration setting includes a compensating phase offset value; adjusting the adjustable radio-frequency circuitry to optimize performance of the transceiver circuitry, wherein adjusting the adjustable radio-frequency circuitry produces phase offsets in the satellite navigation system signals; and while adjusting the adjustable radio-frequency circuitry, adjusting the satellite navigation system receiver by selecting one of the stored calibration settings to compensate for the phase offsets. - View Dependent Claims (8, 9, 10)
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11. Apparatus, comprising:
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an antenna; radio-frequency transceiver circuitry that includes a transceiver and a satellite navigation system receiver; and adjustable radio-frequency circuitry that is interposed between the antenna and the radio-frequency transceiver circuitry and that is operable in a plurality of different modes, wherein; the satellite navigation system receiver receives satellite navigation signals through the antenna and the adjustable radio-frequency circuitry; a phase offset is imposed on the satellite navigation signals by the adjustable radio-frequency circuitry when the adjustable radio-frequency circuitry switches between the different modes; when the adjustable radio-frequency circuitry is operating in a first mode, the satellite navigation system receiver uses a first predetermined compensating phase offset value corresponding to the first mode to compensate the received satellite navigation system signals for the imposed phase offset; and when the adjustable radio-frequency circuitry is operating in a second mode, the satellite navigation system receiver uses a second predetermined compensating phase offset value corresponding to the second mode to compensate the received satellite navigation system signals for the imposed phase offset. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. An electronic device, comprising:
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adjustable radio-frequency circuitry; radio-frequency transceiver circuitry that transmits and receives radio-frequency signals through the adjustable radio-frequency circuitry and that generates a compensating phase offset control signal; a receiver circuit which receives a satellite navigation system signal through the adjustable radio-frequency circuitry; and a multiplexing circuit which receives the compensating phase offset control signal and applies a corresponding compensating phase offset to the receiver circuit to compensate the receiver circuit for a phase offset in the satellite navigation system signal, wherein the phase offset is generated from adjustments in the adjustable radio-frequency circuitry. - View Dependent Claims (19, 20, 21)
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Specification