Reverse link, transmit power correction and limitation in a radiotelephone system

Claim 1

A method for limiting transmit power of a radio operating in a radio communications system, the radio communications system comprising at least one base station that transmits signals including power control commands to the radio, the radio comprising a variable gain amplifier and a maximum gain setting, the method comprising the steps of: determining an open loop power control value in response to a signal received from the at least one base station; determining a gain adjust signal in response to the transmitted power control commands; combining the open loop power control value and the gain adjust signal to produce a summation signal; comparing the summation signal to the maximum gain setting; if the summation signal is greater than or equal to the maximum gain setting, adjusting the variable gain amplifier in response to the maximum gain setting; and if the summation signal is less than the maximum gain setting, adjusting the variable gain amplifier in response to the summation signal.

Claim 2

A method for limiting transmit power of a radio operating in a radio communications system, the radio communications system comprising at least one base station that transmits signals including power control commands to the radio, the radio comprising a variable gain amplifier and a maximum gain setting, the method comprising the steps of: determining an open loop power control value in response to a signal received from the at least one base station; determining a gain adjust signal in response to the transmitted power control commands; combining the open loop power control value and the gain adjust signal to produce a summation signal; comparing the summation signal to the maximum gain setting; if the summation signal is greater than or equal to the maximum gain setting, adjusting the variable gain amplifier in response to the maximum gain setting; and if the summation signal is less than the maximum gain setting, adjusting the variable gain amplifier in response to the summation signal.

Claim 5

A method for limiting transmit power of a radio operating in a cellular environment, the cellular environment comprising a plurality of cells that transmit power control commands to the radio, the radio comprising a variable gain amplifier and a maximum gain setting, the method comprising the steps of: determining an open loop power control value in response to a signal received from at least one cell of the plurality of cells; determining a gain adjust signal in response to the transmitted power control commands; combining the open loop power control value and the gain adjust signal to produce a summation signal; adjusting the maximum gain setting in response to a temperature of the variable gain amplifier; comparing the adjusted maximum gain setting to the summation signal; if the summation signal is greater than or equal to the adjusted maximum gain setting, prohibiting the gain adjust signal from increasing in response to the transmitted power control commands; if the summation signal is greater than or equal to the adjusted maximum gain setting, adjusting the variable gain amplifier in response to the adjusted maximum gain setting; and if the summation signal is less than the adjusted maximum gain setting, adjusting the variable gain amplifier in response to the summation signal.

Claim 6

A method for limiting transmit power of a radio operating in a cellular environment, the cellular environment comprising a plurality of cells that transmit power control commands to the radio, the radio comprising a variable gain amplifier and a maximum gain setting, the method comprising the steps of: determining an open loop power control value in response to a signal received from at least one cell of the plurality of cells; determining a gain adjust signal in response to the transmitted power control commands; combining the open loop power control value and the gain adjust signal to produce a summation signal; adjusting the maximum gain setting in response to a temperature of the variable gain amplifier; comparing the adjusted maximum gain setting to the summation signal; if the summation signal is greater than or equal to the adjusted maximum gain setting, prohibiting the gain adjust signal from increasing in response to the transmitted power control commands; if the summation signal is greater than or equal to the adjusted maximum gain setting, adjusting the variable gain amplifier in response to the adjusted maximum gain setting; and if the summation signal is less than the adjusted maximum gain setting, adjusting the variable gain amplifier in response to the summation signal.

Claim 7

A method for limiting transmit power of a radio operating in a cellular environment, the cellular environment comprising a plurality of cells that transmit power control commands to the radio, the radio comprising a variable gain amplifier, a maximum gain setting, and a power limiting accumulator, the method comprising the steps of: the variable gain amplifier transmitting a signal; determining a gain adjust signal in response to the transmitted power control commands; detecting a power value of the transmitted signal; digitizing the power value; comparing the digitized power value to the maximum gain setting; if the digitized power value is greater than the maximum gain setting, decreasing the gain of the variable gain amplifier; and if the digitized power value is greater than the maximum gain setting, prohibiting the gain adjust signal from increasing in response to the transmitted power control commands.

Claim 8

A method for limiting transmit power of a radio operating in a cellular environment, the cellular environment comprising a plurality of cells that transmit power control commands to the radio, the radio comprising a variable gain amplifier, a maximum gain setting, and a power limiting accumulator, the method comprising the steps of: the variable gain amplifier transmitting a signal; determining a gain adjust signal in response to the transmitted power control commands; detecting a power value of the transmitted signal; digitizing the power value; comparing the digitized power value to the maximum gain setting; if the digitized power value is greater than the maximum gain setting, decreasing the gain of the variable gain amplifier; and if the digitized power value is greater than the maximum gain setting, prohibiting the gain adjust signal from increasing in response to the transmitted power control commands.

Claim 9

A method for limiting transmit power of a radio operating in a cellular environment, the cellular environment comprising a plurality of cells that transmit power control commands to the radio, the radio comprising a variable gain amplifier, a maximum gain setting, and a power control command accumulator that generates a gain adjust signal, the method comprising the steps of: the variable gain amplifier transmitting a signal; determining the gain adjust signal in response to the transmitted power control commands; detecting a power value of the transmitted signal; digitizing the power value; comparing the digitized power value to the maximum gain setting; if the digitized power value is greater than the maximum gain setting, decreasing the gain adjust signal by a predetermined amount for every predetermined unit of time until the gain adjust signal is less than the maximum gain setting; and if the digitized power value is less than or equal to the maximum gain setting, varying the gain of the variable gain amplifier in response to the gain adjust signal.

Claim 10

A method for limiting transmit power of a radio operating in a cellular environment, the cellular environment comprising a plurality of cells that transmit power control commands to the radio, the radio comprising a variable gain amplifier, a maximum gain setting, and a power control command accumulator that generates a gain adjust signal, the method comprising the steps of: the variable gain amplifier transmitting a signal; determining the gain adjust signal in response to the transmitted power control commands; detecting a power value of the transmitted signal; digitizing the power value; comparing the digitized power value to the maximum gain setting; if the digitized power value is greater than the maximum gain setting, decreasing the gain adjust signal by a predetermined amount for every predetermined unit of time until the gain adjust signal is less than the maximum gain setting; and if the digitized power value is less than or equal to the maximum gain setting, varying the gain of the variable gain amplifier in response to the gain adjust signal.

Claim 11

A method for limiting transmit power of a radio operating in a cellular environment, the cellular environment comprising a plurality of cells that transmit power control commands to the radio, the radio comprising a variable gain amplifier, a maximum gain setting, and a power limiting accumulator, the method comprising the steps of: the variable gain amplifier transmitting a signal; determining a gain adjust signal in response to the transmitted power control commands; detecting a power value of the transmitted signal; digitizing the power value; determining a difference between the digitized power value and the maximum gain setting; integrating the difference to generate a gain control signal, the gain control signal being limited to a predetermined range; adjusting the variable gain amplifier with the gain control signal; and if the gain control signal is less than a predetermined value, prohibiting the gain adjust signal from increasing the variable gain amplifier in response to the transmitted power control commands.

Claim 12

A method for limiting transmit power of a radio operating in a cellular environment, the cellular environment comprising a plurality of cells that transmit power control commands to the radio, the radio comprising a variable gain amplifier, a maximum gain setting, and a power limiting accumulator, the method comprising the steps of: the variable gain amplifier transmitting a signal; determining a gain adjust signal in response to the transmitted power control commands; detecting a power value of the transmitted signal; digitizing the power value; determining a difference between the digitized power value and the maximum gain setting; integrating the difference to generate a gain control signal, the gain control signal being limited to a predetermined range; adjusting the variable gain amplifier with the gain control signal; and if the gain control signal is less than a predetermined value, prohibiting the gain adjust signal from increasing the variable gain amplifier in response to the transmitted power control commands.