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General phase perturbation method

A phase and feedback communication technology, applied in the direction of location diversity, devices dedicated to transmitters, diversity/multi-antenna systems, etc., can solve problems such as reduced efficiency

Active Publication Date: 2014-06-25
GOOGLE LLC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Perturbations may become less efficient in either case, especially under rapidly changing environmental conditions

Method used

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  • General phase perturbation method
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Embodiment Construction

[0018] figure 1 A block diagram illustrating one example of a communication network 10 comprising a transmitter T and a receiver R is shown. The transmitter T comprises at least two antennas 100A, 100B and transmits data and control signals 24 to a receiver R. The receiver includes at least one antenna 110 that receives the signal 24 .

[0019] The transmitter T also includes a transceiver module 12A, a correcting communication device 20A and a signal (phase) corrector 32 . In this example, the modified communication device 20A performs a process for determining a modified (eg, phase perturbation signal) signal, such as a transmit diversity parameter, at the perturbation rate and transmits the signal to the receiver R.

[0020] The receiver R comprises a transceiver module 12B, a feedback communication device 20B that receives transmit diversity signals and controls a feedback generator 30 . The feedback generator generates and returns feedback information describing the t...

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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.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Patent Application No. 61 / 547,323, filed October 14, 2011, which is hereby incorporated by reference in its entirety. technical field [0003] The present disclosure relates generally to the field of wireless communications, and more particularly to modifying signals by controlling transmit diversity parameters. More particularly, the two antennas are provided with phase perturbed signals, said information being selected to reduce the phase discontinuity at the receiver. Background technique [0004] The modified communication device includes multiple antenna elements that transmit signals to convey information. Feedback communication devices extract information from transmitted signals. Multiple antenna elements increase spectral efficiency, allowing more users to be served simultaneously over a given frequency band. However, the transmitted signal travels along a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06
CPCH04B7/026H04L1/0033H04B7/0623H04B7/0682
Inventor H·哈里尔E·阿布里尤
Owner GOOGLE LLC
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