SYSTEM AND METHOD FOR ADAPTIVE BEAMFORMING FOR SPECIFIC ABSORPTION RATE CONTROL
3 Assignments
0 Petitions
Accused Products
Abstract
A system may include a modifiable mobile device having at least two antennas coupled to fractional amplifiers, with returned power detectors. A beamformer unit provides adaptive beam shaping pattern, and a baseband processor provides beam pattern requirements, wherein the beamformer unit modifies the beam pattern requirements with return loss sampling information to shape the adaptive beam pattern so that a transmitted beam pattern minimizes transmitted power reflected back to the mobile device. A method may include regularly measuring a return power level, if output power is greater than a specific absorption rate level, comparing the return power level to a first threshold, else implementing mobile transmit diversity (MTD), and repeating. If the return power level is greater than the first threshold, implementing a MTD combined with reflection-based beamforming that modifies beam pattern requirements of the mobile device with return loss sampling information to create an adaptive beam pattern.
250 Citations
22 Claims
-
1-8. -8. (canceled)
-
9. A method comprising the steps of:
-
a) measuring a return power level present at antennas of a modifiable mobile communication device at regular time intervals; b) determining that an output power of the modifiable mobile communication device is greater than a predefined specific absorption rate level, and comparing the return power level to a first threshold; c) determining that the return power level is greater than the first threshold, implementing a mobile transmit diversity algorithm combined with a reflection-based beamforming technique, the reflection-based beamforming technique providing an adaptive beam shaping pattern that shapes a transmitted beam pattern to minimize an amount of reflected transmitted power; d) re-measuring the return power level; e) determining that the return power level has increased, and applying a change to a diversity parameter of the mobile transmit diversity algorithm based on the results of the evaluating step; f) determining that the return power level is equal to or greater than a second threshold, repeating steps c-e until the return power level is less than the second threshold. - View Dependent Claims (10, 11, 12, 13, 14, 15)
-
-
16. A method comprising the steps of;
-
a) measuring a return power level present at antennas of a modifiable mobile communication device at regular time intervals; b) determining that an output power of the modifiable mobile communication device is greater than a predefined specific absorption rate level, and comparing the return power level to a first threshold; c) determining that the return power level is greater than the first threshold, implementing a mobile transmit diversity algorithm combined with reflection-based beamforming, the reflection-based beamforming providing an adaptive beam shaping pattern that shapes a transmitted beam pattern to minimize an amount of reflected transmitted power; d) re-measuring the return power level; e) determining that the return power level has increased, and reducing the output power of the modifiable mobile communication device; f) determining that the return power level is less than a second threshold, repeating steps a-b, until the output power of the modifiable mobile communication device is less than or equal to the predefined specific absorption rate level. - View Dependent Claims (17, 18, 19, 20)
-
-
21. A method comprising the steps of:
-
a) measuring a return power level present at antennas of a modifiable mobile communication device at regular time intervals; b) determining that an output power of the modifiable mobile communication device is less than or equal to a predefined specific absorption rate level, implementing mobile transmit diversity; and c) repeating steps a-c, until the output power of the modifiable mobile communication device is greater than a predefined specific absorption rate level; d) determining that the return power level is greater than the first threshold, implementing a mobile transmit diversity algorithm combined with a reflection-based beamforming technique, the reflection-based beamforming technique providing an adaptive beam shaping pattern that shapes a transmitted beam pattern to minimize an amount of reflected transmitted power; e) re-measuring the return power level; f) determining that the return power level has increased, and applying a change to a diversity parameter of the mobile transmit diversity algorithm based on the results of the evaluating step; g) determining that the return power level is less than a second threshold, and repeating steps a-b.
-
-
22. A method comprising the steps of:
-
a) measuring a return power level present at antennas of a modifiable mobile communication device at regular time intervals; b) determining that an output power of the modifiable mobile communication device is not greater than a predefined specific absorption rate level; c) implementing mobile transmit diversity; and d) repeating steps a-c, until the output power of the modifiable mobile communication device is greater than a predefined specific absorption rate level; e) determining that the return power level is greater than the first threshold, implementing a mobile transmit diversity algorithm combined with reflection-based beamforming, the reflection-based beamforming providing an adaptive beam shaping pattern that shapes a transmitted beam pattern to minimize an amount of reflected transmitted power; f) re-measuring the return power level; g) determining that the return power level has increased, and reducing the output power of the modifiable mobile communication device; h) determining that the return power level is equal to or greater than the second threshold, and repeating steps e-g, until the return power level is less than the second threshold.
-
Specification