General phase perturbation method
AssigneeGoogle Inc.
InventorsHaim Harel, Eduardo Abreu
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Abstract
A method for modifying a signal transmitted from a mobile communication device comprising perturbing a transmit diversity parameter from its nominal value by modulating the parameter with respect to the nominal value in alternating directions, receiving a feedback signal including feedback information relating to the modified signal as received at a feedback device, and based at least on the feedback information, adjusting the nominal value of the transmit diversity parameter by increasing, decreasing, or preserving the nominal value. The perturbations are selected to minimize phase discontinuities.
Claims15
A method of modifying a signal transmitted from a modifying communication device in communication with a feedback communication device, comprising:
- perturbing a transmit diversity parameter from its nominal value at a perturbation rate;
- receiving a feedback signal at a feedback rate from the feedback communication device, the feedback signal including feedback information relating to the receipt of the perturbed signal at said feedback communication device;
- and
- based on said feedback communication, adjusting the nominal value of said transmitted diversity parameter by a differential value, wherein said differential value is a fraction less than one of said nominal value.
A method of transmitting a signal from a transmitter to a receiver over a communication channel, the transmitter having a first and a second antenna transmitting respective first and second components of the signal, the method comprising the steps of:
- receiving by said transmitter of a nominal phase difference between said first and second component as perceived at the receiver;
- and
- perturbing at least one of said first and second components by differential phase, wherein said differential phase being a fractional value of said nominal phase difference.
A method of transmitting a signal from a transmitter to a receiver over a communication channel, the transmitter having a first and a second antenna transmitting respective first and second components of the signal, the method comprising the steps of:
- perturbing in the transmitter a transmit diversity parameter by an incremental amount from its nominal value at a perturbation rate by modulating the transmit diversity parameter with respect to the nominal value in a first direction for at least said first component, said differential value being a fraction of said nominal value;
- receiving from the receiver a feedback signal according to a communication protocol, the feedback signal including feedback information relating to the perturbed signals as received at said feedback communication device;
- and based at least on said feedback information, adjusting at the transmitter the nominal value of the transmit diversity parameter by increasing, decreasing, or preserving the nominal value.
A method of transmitting a signal from a transmitter to a receiver over a communication channel, the transmitter having a first and a second antenna transmitting respective first and second components of the signal, the method comprising the steps of:
- receiving by said transmitter a phase difference between said first and second component;
- and
- perturbing said first and second components by first and second differential phases, respectively, wherein said first and second differential phases have the same magnitude but opposite directions, said differential phases being a fractional value of said phase difference perturbation.
Dependencies are inferred from the claim text.