Shaping near-field transmission signals
First Claim
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1. A method comprising:
- estimating a coupling condition of an antenna;
shaping, based on the coupling condition of the antenna, a baseband data signal;
modulating a radio frequency (RF) carrier signal with the shaped baseband data signal to provide a shaped transmission signal;
applying the shaped transmission signal to the antenna to generate an RF field, the shaped transmission signal effective to reduce distortion of the RF field associated with the coupling condition;
updating the coupling condition of the antenna; and
dynamically adjusting the shaped transmission signal while the shaped transmission signal is applied to the antenna, the adjusting responsive to a changed coupling condition.
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Abstract
The present disclosure describes apparatuses and techniques for shaping near-field transmission signals. In some aspects, a baseband data signal is shaped based on a coupling condition of an antenna. A radio frequency (RF) carrier signal is modulated with the shaped baseband data signal to provide a shaped transmission signal, which is then applied to the antenna to generate an RF field. The shaped transmission signal can be effective to reduce distortions of the RF field associated with the coupling condition.
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Citations
20 Claims
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1. A method comprising:
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estimating a coupling condition of an antenna; shaping, based on the coupling condition of the antenna, a baseband data signal; modulating a radio frequency (RF) carrier signal with the shaped baseband data signal to provide a shaped transmission signal; applying the shaped transmission signal to the antenna to generate an RF field, the shaped transmission signal effective to reduce distortion of the RF field associated with the coupling condition; updating the coupling condition of the antenna; and dynamically adjusting the shaped transmission signal while the shaped transmission signal is applied to the antenna, the adjusting responsive to a changed coupling condition. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A circuit comprising:
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one or more components configured to; shape a baseband data signal, the shaping based on a coupling condition of the antenna; and dynamically adjust the baseband data signal responsive to a change in the coupling condition during operation of the circuit; a modulator configured to; modulate a radio frequency (RF) carrier signal with the shaped baseband data signal to provide a shaped transmission signal; and responsive to the change in the coupling condition, modulate the RF carrier signal with the adjusted baseband data signal to provide an adjusted transmission signal; and a transmitter configured to; transmit the shaped transmission signal via the antenna to generate an RF field, the shaped transmission signal effective to reduce distortions of the RF field due to the coupling condition; and transmit the adjusted transmission signal to generate an RF field, the adjusted transmission signal effective to reduce distortions of the RF field due to the changed coupling condition. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A System-on-Chip comprising:
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a modulator configured to modulate a radio frequency (RF) carrier signal with a baseband data signal to provide a transmission signal; a transmitter configured to apply, through an antenna interface, the transmission signal to an antenna to produce an RF field; and a signal-shape controller configured to; determine a coupling condition of the antenna; calculate, based on the coupling condition of the antenna, parameters for shaping the baseband data signal; shape, based on the parameters, the baseband data signal effective to provide a shaped transmission signal that, when transmitted via the antenna, creates an RF field having reduced coupling condition-related distortion; re-calculate, responsive to a changed coupling condition of the antenna, adjusted parameters for shaping the baseband data signal; and dynamically adjust, during transmission and based on the re-calculated adjusted parameters, the baseband data signal effective to provide an adjusted transmission signal that, when transmitted, creates an RF field having reduced coupling condition-related distortion. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification