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US 7,411,930 B2Granted
Apparatus and method for prioritized apportionment of transmission power in a multi-carrier terminal
AssigneeQUALCOMM Incorporated
InventorsJuan Montojo, Naga Bhushan, Peter John Black
Life of this patent
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Abstract
In a multi-carrier access terminal having a transmitter with a single power amplifier, maximum transmission power available for a multi-carrier signal transmitted by the terminal is apportioned among a plurality of carriers on a priority basis. Following apportionment, the carriers are combined into a multi-carrier signal, amplified by the power amplifier and transmitted.
Claims21
A transmitter for a multi-carrier terminal, comprising:
- a first transmission circuit for providing a first carrier for a first channel;
- at least a second transmission circuit for providing at least a second carrier for a second channel;
- a combiner connected to the transmission circuits for combining the first carrier and at least the second carrier into a multi-carrier signal;
- a power amplifier connected to the combiner for amplifying the multi-carrier signal;
- and
- a processor connected to a power detector and to the transmission circuits for apportioning power available for the amplified multi-carrier signal between the first and second carriers according to a carrier priority, wherein the carrier priority allocates to the first carrier a first carrier portion of the transmission power, and allocates to the second carrier a second carrier portion of the transmission power, the second carrier portion being based on the power available for the multi-carrier signal reduced by the first carrier portion.
3 more elements
A transmitter for a multi-carrier terminal, comprising:
- a voice transmission circuit for providing a voice carrier for a voice channel;
- at least one data transmission circuit for providing a at least one data carrier for a data channel;
- a combiner connected to the voice transmission circuit and the at least one data transmission circuit for combining the voice carrier and at least the one data carrier into a multi-carrier signal;
- a power amplifier connected to the combiner;
- a power detector connected to the power amplifier for measuring a power level of an amplified multi-carrier signal produced by the power amplifier;
- and
- a processor connected to the power detector, the voice transmission circuit, and the at least one data transmission circuit for apportioning a maximum amount of transmission power available for the multi-carrier signal between the voice carrier and the one data carrier in a first operational mode of the terminal by first allocating a voice carrier portion of the transmission power to the voice carrier and then allocating a data carrier portion of the transmission power by:
- MaxDataPower=[MaxTxPowerAnalog−TxAnalogPower]+[TxPilotPower*T2P(rate)]−MarginForVoice
- where:
- MaxDataPower is maximum power allocated to the one data carrier;
- MaxTxPowerAnalog is a maximum level of power available to the voice carrier;
- TxAnalogPower is the power level of an amplified multi-carrier signal power measured by the power detector;
- TxPilotPower is the power level of a pilot signal of the data channel;
- T2P(rate) is a gain to translate the power of the pilot signal to overall signal power;
- and
- MarginForVoice is a margin of power reserved for the voice carrier.
13 more elements
A method of operating a multi-carrier access terminal for a wide area network, comprising:
- providing a maximum amount of transmission power for a multi-carrier signal to be transmitted by the terminal;
- providing a first carrier for transmitting first information;
- providing at least a second carrier for transmitting second information;
- combining the first carrier and at least the second carrier into a multi-carrier signal;
- apportioning the transmission power for the multi-carrier signal between the first and second carriers according to a carrier priority;
- and
- transmitting the multi-carrier signal at a power no greater then the maximum amount, wherein the carrier priority allocates to the first carrier a first carrier portion of the transmission power, and allocates to the second carrier a second carrier portion of the transmission power, the second carrier portion being based on the power available for the multi-carrier signal reduced by the first carrier portion.
4 more elements
A method for controlling transmission power in a multi-carrier terminal, comprising:
- providing a voice carrier for a voice channel;
- providing a at least one data carrier for a data channel;
- combining the voice carrier and at least the one data carrier into a multi-carrier signal;
- amplifying the multi-channel carrier signal;
- measuring a power level of the amplified multi-carrier signal;
- and
- apportioning a maximum amount of transmission power available for the multi-carrier signal between the voice carrier and the one data carrier in a first operational mode of the terminal by first allocating a voice carrier portion of the transmission power to the voice carrier and then allocating a data carrier portion of the transmission power by:
- MaxDataPower=[MaxTxPowerAnalog−TxAnalogPower]+[TxPilotPower*T2P(rate)]−MarginForVoice
- where:
- MaxDataPower is maximum power allocated to the one data carrier;
- MaxTxPowerAnalog is a maximum level of power available to the voice carrier;
- TxAnalogPower is the measured power level of an amplified multi-carrier signal power;
- TxPilotPower is the power level of a pilot signal of the data channel;
- T2P(rate) is a gain to translate the power of the pilot signal to overall signal;
- and
- MarginForVoice is a margin of power reserved for the voice carrier.
13 more elements
A method of operating a transmitter having a power amplifier, comprising:
- providing a maximum amount of transmission power for a multi-carrier signal to be transmitted by the transmitter;
- providing a plurality of carriers for transmitting information;
- apportioning the transmission power for a multi-carrier signal between the carriers according to a carrier priority;
- combining carriers of the plurality of carriers into a multi-carrier signal;
- amplifying the multi-carrier signal with the power amplifier;
- and
- transmitting the multi-carrier signal at a power no greater then the maximum amount, wherein the maximum amount of transmission power (MaxTxPower) is apportioned to a carrier y of the plurality of carriers according to:
- MaxPowerCarrier
-
-
- y
- =
- MaxTxPowerAnalog
- -
-
- ∑
- i
- =
- 1
- y
- -
- 1
-
- (
- PowerCarrier
-
-
- i
- )
- -
- Margin
-
- where MaxPowerCarrier y is the maximum amount of power available for carrier y, Margin is a margin of power having a value equal to or greater than zero, and
- ∑
- i
- =
- 1
- y
- -
- 1
-
- (
- PowerCarrier
-
-
- i
- )
- is the total transmission power apportioned to carriers of the plurality of carriers having higher priorities than the carrier y.
45 more elements
A transmitter for a multi-carrier terminal, comprising:
- means for providing a maximum amount of transmission power for a multi-carrier signal to be transmitted by the terminal;
- means for providing a first carrier for transmitting first information;
- means for providing at least a second carrier for transmitting second information;
- means for combining the first carrier and at least the second carrier into a multi-carrier signal;
- means for apportioning the transmission power for the multi-carrier signal between the first and second carriers according to a carrier priority;
- and
- means for transmitting the multi-carrier signal at a power no greater than the maximum amount, wherein the carrier priority allocates to the first carrier a first carrier portion of the transmission power, and allocates to the second carrier a second carrier portion of the transmission power, the second carrier portion being based on the power available for the multi-carrier signal reduced by the first carrier portion.
4 more elements
Dependencies are inferred from the claim text.