WIRELESS COMMUNICATION UNIT, INTEGRATED CIRCUIT AND METHOD OF POWER CONTROL OF A POWER AMPLIFIER THEREFOR
First Claim
1. A wireless communication unit comprising a transmitter having a forward path comprising a power amplifier, PA, and a feedback path operably coupled to the power amplifier, wherein the feedback path comprises a coupler arranged to feed back a portion of a signal to be transmitted and a controller logic module arranged to control a power control value of the power amplifier, such that the forward path and feedback path form a closed loop power control,wherein the feedback path further comprises a peak detector logic module operably coupled to the controller logic module and power amplifier and arranged to identify a level of peak PA compression in a fed back signal, wherein in response to the identified level of peak PA compression the controller logic module is arranged to automatically adjust a power amplifier power control value of the PA to obtain a predetermined level of peak PA compression.
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Accused Products
Abstract
A wireless communication unit comprising a transmitter having a power amplifier, a controller logic module arranged to control a power control value of the power amplifier and a closed loop control system operably coupled to the power amplifier and arranged to monitor a level of peak PA compression, wherein in response to the identified level of peak PA compression the controller logic module is arranged to automatically adjust a power amplifier power control value of the PA to obtain a predetermined level of peak PA compression.
124 Citations
28 Claims
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1. A wireless communication unit comprising a transmitter having a forward path comprising a power amplifier, PA, and a feedback path operably coupled to the power amplifier, wherein the feedback path comprises a coupler arranged to feed back a portion of a signal to be transmitted and a controller logic module arranged to control a power control value of the power amplifier, such that the forward path and feedback path form a closed loop power control,
wherein the feedback path further comprises a peak detector logic module operably coupled to the controller logic module and power amplifier and arranged to identify a level of peak PA compression in a fed back signal, wherein in response to the identified level of peak PA compression the controller logic module is arranged to automatically adjust a power amplifier power control value of the PA to obtain a predetermined level of peak PA compression.
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9. An integrated circuit for performing power control of a transmitter comprising a power amplifier, PA, the integrated circuit comprising a forward path and a feedback path operably coupleable to the PA, wherein the feedback path comprises a controller logic module arranged to control a power control value of the power amplifier, such that the forward path and feedback path form a closed loop power control,
wherein the feedback path further comprises a peak detector logic module operably coupled to the controller logic module and arranged to identify a level of peak PA compression in a fed back signal, wherein in response to the identified level of peak PA compression the controller logic module is arranged to automatically adjust a power amplifier power control value to be applied to the PA to obtain a predetermined level of peak PA compression.
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10. A method of power control in a wireless communication unit comprising a transmitter having a forward path comprising a power amplifier, PA, and a feedback path operably coupled to the PA and comprising a controller logic module arranged to control a power control value of the power amplifier, such that the forward path and feedback path form a closed loop power control,
wherein the method comprises: -
identifying a level of peak PA compression in a fed back signal from the PA, and automatically adjusting a power amplifier power control value of the PA in response to the identified level of peak PA compression to obtain a predetermined level of peak PA compression. - View Dependent Claims (11)
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Specification