ADJUSTABLE ELLIPTICAL POLARIZATION PHASING AND AMPLITUDE WEIGHTING FOR A HEARING INSTRUMENT
First Claim
1. A hearing aid, comprising:
- processing circuitry for processing an input signal from a microphone into an output signal for driving a speaker;
a wireless transceiver connected to the processing circuitry;
an antenna array connected to the wireless transceiver, wherein the antenna array comprises two or more antennas with different polarizations;
wherein the processing circuitry further comprises a transmit state machine and a receive state machine;
wherein the transmit state machine is configured to adjust the phases and amplitudes of uplink signals that drive the antennas in response to detection of a degradation in uplink signal quality; and
,wherein the receive state machine is configured to adjust the phases and amplitudes of downlink signals received from the antennas in response to detection of a degradation in downlink signal quality.
2 Assignments
0 Petitions
Accused Products
Abstract
Multiple antennas at the receiver and/or transmitter are commonly used in wireless communications systems to provide diversity in order reduce fading and other effects brought about by multi-path propagation. Due to the size of hearing aids and the wavelengths of the frequencies used for communication, it is difficult to achieve what is called spatial diversity by disposing the multiple antennas at different locations. Described herein are techniques for providing polarization diversity in hearing aids using antennas with different polarizations and applying the appropriate phase shifts to the received and/or transmitted signals to improve the signal quality.
11 Citations
24 Claims
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1. A hearing aid, comprising:
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processing circuitry for processing an input signal from a microphone into an output signal for driving a speaker; a wireless transceiver connected to the processing circuitry; an antenna array connected to the wireless transceiver, wherein the antenna array comprises two or more antennas with different polarizations; wherein the processing circuitry further comprises a transmit state machine and a receive state machine; wherein the transmit state machine is configured to adjust the phases and amplitudes of uplink signals that drive the antennas in response to detection of a degradation in uplink signal quality; and
,wherein the receive state machine is configured to adjust the phases and amplitudes of downlink signals received from the antennas in response to detection of a degradation in downlink signal quality. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for operating a hearing aid, comprising:
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operating a wireless transceiver to drive an antenna array during uplink transmission and receive signals from the antenna array during downlink reception, wherein the antenna array comprises two or more antennas with different polarizations; operating a transmit state machine to adjust the phases and amplitudes of uplink signals that drive the antennas in response to a degradation in uplink signal quality; and
,operating a receive state machine to adjust the phases and amplitudes of downlink signals received from the antennas in response to a degradation in downlink signal quality. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification