Method and a device for adjusting power amplifier properties
First Claim
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1. A method, comprising:
- prior to wireless transmission of a data signal by an electronic device to a network element in a wireless communication system, the electronic device receiving signalling information from the network element relating to parameters for the wireless transmission of the data signal,the electronic device deducing maximum peak-to-average ratio control information from the signalling information for adjusting properties of a power amplifier of the electronic device affecting power efficiency of the power amplifier in amplifying the data signal for the wireless transmission to the network element,the electronic device adjusting the properties of the power amplifier including a load impedance of the power amplifier and at least two parameters of the power amplifier according to the deduced maximum peak-to-average information and mappings between the deduced maximum peak-to-average information and values of the at least two parameters of the power amplifier and the load impedance stored in a memory or control logic of the electronic device so that the power efficiency of the power amplifier is tuned by the adjusting of the load impedance and the values of the at least two parameters, wherein the at least two parameters of the power amplifier include a bias current for the power amplifier, andafter the tuning of the power efficiency of the power amplifier, the tuned power amplifier amplifying the data signal and the electronic device transmitting the amplified data signal in the wireless transmission to the network element in the wireless communication system.
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Abstract
A method and a device for tuning power amplifier (PA, 203) properties such as back-off. A peak-to-average value (PAR) of the amplifier input signal is first obtained by control means (206) and then used for adjusting the power amplifier (203) with tuning means (204, 208, 210) functionally connected to the amplifier (203). The suggested solution is advantageously exploited in a wireless communications device like a mobile terminal to optimize the performance thereof by, for example, reducing the power dissipation in the transmitter.
50 Citations
38 Claims
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1. A method, comprising:
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prior to wireless transmission of a data signal by an electronic device to a network element in a wireless communication system, the electronic device receiving signalling information from the network element relating to parameters for the wireless transmission of the data signal, the electronic device deducing maximum peak-to-average ratio control information from the signalling information for adjusting properties of a power amplifier of the electronic device affecting power efficiency of the power amplifier in amplifying the data signal for the wireless transmission to the network element, the electronic device adjusting the properties of the power amplifier including a load impedance of the power amplifier and at least two parameters of the power amplifier according to the deduced maximum peak-to-average information and mappings between the deduced maximum peak-to-average information and values of the at least two parameters of the power amplifier and the load impedance stored in a memory or control logic of the electronic device so that the power efficiency of the power amplifier is tuned by the adjusting of the load impedance and the values of the at least two parameters, wherein the at least two parameters of the power amplifier include a bias current for the power amplifier, and after the tuning of the power efficiency of the power amplifier, the tuned power amplifier amplifying the data signal and the electronic device transmitting the amplified data signal in the wireless transmission to the network element in the wireless communication system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An apparatus, comprising:
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a receiver for receiving signalling information from a network element of a wireless communication network value related to parameters for a wireless transmission of a data signal from the apparatus to the network element; and a control device for deducing maximum peak-to-average ratio control information from the signalling information for adjusting properties of a power amplifier of the apparatus affecting power efficiency of the power amplifier in amplifying the data signal for the wireless transmission to the network element, the control device for adjusting the properties of the power amplifier including a load impedance of the power amplifier and at least two parameters of the power amplifier according to the deduced maximum peak-to-average control information and mappings between the deduced maximum peak-to-average control information and values of the at least two parameters of the power amplifier and the load impedance stored in a memory or control logic of the apparatus so that the power efficiency of the power amplifier is tuned by the adjusting of the load impedance and the values of the at least two parameters, wherein the at least two parameters of the power amplifier include a bias current for the power amplifier; and a transmitter for transmitting the data signal amplified by the tuned power amplifier in the wireless transmission to the network element. - View Dependent Claims (15, 16, 17, 18, 19)
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20. An apparatus comprising:
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at least one processor; and at least one memory including program code, the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to; receive signalling information from a network element relating to parameters for a wireless transmission of a data signal from the apparatus to the network element deduce maximum peak-to-average ratio control information from the signalling information for adjusting properties of a power amplifier of the apparatus affecting power efficiency of the power amplifier in amplifying the data signal for the wireless transmission to the network element; adjust the properties of the power amplifier including a load impedance of the power amplifier and at least two parameters of the power amplifier according to the deduced maximum peak-to-average ratio control information and mappings between the deduced maximum peak-to-average ratio information and values of the at least two parameters of the power amplifier stored in the memory so that the power efficiency of the power amplifier is tuned by the adjusting of the load impedance and the values of the at least two parameters, wherein the at least two parameters of the power amplifier include a bias current for the power amplifier. - View Dependent Claims (21, 22, 23, 24, 25)
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26. An apparatus comprising:
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a receiver for receiving signalling information from a network element of a wireless communication network from which a maximum peak-to-average value related to an amplifier input signal of a power amplifier in the apparatus is deducible and for providing control information based on the maximum peak-to-average value deduced from the received signalling information and based on mappings between different peak-to-average values and at least two amplifier parameter values; at least two adjusting components for receiving the control information and adjusting a load impedance of the power amplifier and the at least two amplifier parameters based on the control information so that a back-off of the power amplifier is tuned by the adjusting the load impedance and the at least two amplifier parameters, the power amplifier functionally connected to the least two adjusting components according to the control information, wherein said at least two parameters of the power amplifier include a bias current for the power amplifier; and a transmitter, responsive to an output signal comprising the input signal amplified by the power amplifier tuned by the at least two adjusting components, for wirelessly transmitting the output signal to the network element. - View Dependent Claims (27, 28, 30, 31)
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29. The apparatus of 26, further comprising a device for obtaining an average power value of the power amplifier output signal, and wherein at least one of the at least two adjusting components is for adjusting at least one amplifier parameter according to the average power value.
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32. An apparatus, comprising:
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at least one processor and; at least one memory including computer program code, the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to; receive signalling information from a network element in a wireless communication, deduce a maximum peak-to-average value from the signalling information for adjusting properties of a power amplifier in the apparatus, provide control information based on the deduced maximum peak-to-average value and mappings between different peak-to-average values and amplifier parameter values, adjust a load impedance of the power amplifier and at least two amplifier parameters based on the control information so that a back-off of the power amplifier is tuned by adjusting the load impedance and the at least two parameters wherein the at least two parameters of the power amplifier include a bias current for the power amplifier, and wirelessly transmit an output signal of the tuned power amplifier to the network element. - View Dependent Claims (33, 34, 35, 36, 37)
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38. A non-transitory memory storing a computer program including executable instructions for execution by a processor to cause an apparatus to:
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receive wireless signalling information from a network element related to transmission of an input signal amplified by a power amplifier in the apparatus, deduce a maximum peak-to-average value from the signalling information received by the apparatus from the wireless network element, and adjust at least one property of the power amplifier according to the deduced maximum peak-to-average value and mappings between different peak-to-average values and the at least one property so that a back-off of the power amplifier is tuned by the adjusting of the at least one property of the power amplifier, and send an output signal of the power amplifier wirelessly to the network element, the output signal comprising the input signal amplified by the power amplifier tuned by the adjusting of the at least one property of the power amplifier.
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Specification