Transmit frequency based terminal uplink power control in a satellite communication system
AssigneeHughes Network Systems, LLC
InventorsMurali Regunathan, George Eapen
Life of this patent
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Abstract
Methods and apparatus are disclosed for uplink power control of a terminal in a satellite communication system. Calibration data that includes output backoff values corresponding to input backoff values for each of a first set of calibration frequencies is initially stored in the terminal. A normalized transmit power for the terminal is determined for multiple transmit frequencies based on the calibration data. Upon receiving an assigned frequency for communicating, the terminal selects one of the normalized transmit power previously determined and begins transmitting.
Claims20
A method for determining a normalized transmit power for a terminal of a wireless communications network, wherein calibration data stored in the terminal comprises a first set of calibration frequencies, a first set of input backoff values each corresponding to a respective frequency of the first set of calibration frequencies, a first set of output backoff values each corresponding to a respective input backoff value of the first set of input backoff values, a second set of calibration frequencies, and a first set of gain values each corresponding to a respective frequency of the second set of calibration frequencies, the method comprising:
- generating a first subset S1 of frequencies from the first set of calibration frequencies, based on matching a minimum transmit frequency to the first set of calibration frequencies and matching a maximum transmit frequency to the first set of calibration frequencies;
- generating a second subset S2 of frequencies from the second set of calibration frequencies based on matching the minimum transmit frequency to the second set of calibration frequencies and matching the maximum transmit frequency to the second set of calibration frequencies;
- generating a first subset G of gain values from the first set of gain values, wherein the first subset G comprises each gain value of the first set which corresponds with a one of the calibration frequencies of the second subset S2;
- generating a third subset S2r of frequencies by interpolating adjacent frequencies of the second subset S2;
- generating a second subset Gr of gain values by interpolating adjacent gain values of the first subset G;
- determining a normalized transmit power for each of the frequencies of the third subset S2r based, at least in part, on the second subset Gr and a corresponding output backoff value;
- receiving an assigned frequency for communications by the terminal to a gateway of the wireless communications network;
- selecting a first one of the normalized transmit powers corresponding to the assigned frequency;
- and
- transmitting uplink data to the gateway using the selected first normalized transmit power.
A method comprising:
- obtaining calibration data for a terminal during a calibration procedure, wherein the calibration data comprises output backoff values corresponding to input backoff values for each of a first set of calibration frequencies, and a first set of gain values associated with each of a second set of calibration frequencies;
- generating a first subset S1 of frequencies based on matching a minimum transmit frequency to the first set of calibration frequencies and matching a maximum transmit frequency to the first set of calibration frequencies;
- generating a second subset S2 of frequencies based on matching the minimum transmit frequency to the second set of calibration frequencies and matching the maximum transmit frequency to the second set of calibration frequencies;
- obtaining, from the first set of gain values, a first subset G of gain values associated with the second subset S2;
- interpolating adjacent frequencies of the second subset S2 to obtain a third subset S2r of frequencies;
- interpolating adjacent gain values of the first subset G to obtain a second subset Gr of gain values;
- determining a normalized transmit power for each of the frequencies of the third subset S2r based on the second subset Gr and a corresponding output backoff value;
- receiving an assigned frequency for communicating with a gateway in a satellite communication system;
- and
- transmitting uplink data to the gateway using a selected normalized transmit power corresponding to the assigned frequency.
Dependencies are inferred from the claim text.