CIRCUIT AND METHOD FOR ANTENNA SELECTION IN AN ANTENNA DIVERSITY RECEIVER
First Claim
1. An asynchronous receiver system comprising:
- a plurality of antennae;
an asynchronous receiver circuit having a signal input, the asynchronous receiver circuit being configured to asynchronously receive a wireless signal at the signal input, the asynchronous receiver circuit being further configured to generate at least a first quality signal responsive to the received wireless signal;
a switch configured to controllably select one of the plurality of antennae for coupling to the input of the asynchronous receiver circuit responsive to a control signal;
a controller configured to receive the first quality signal and generate the switching control signal, where the controller is configured to sequentially select each one of the plurality of antennae, measure the first quality signal and start a timer with a time value for the selected antenna, select a next one of the plurality of antennae if the timer expires, store the measured values for the first quality signal, and select one of the plurality of antenna to receive a remainder of a data packet based on the measured first signal quality values for the plurality of antennae.
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Accused Products
Abstract
An asynchronous receiver system has multiple antennae and an asynchronous receiver circuit with a signal input. The asynchronous receiver circuit receives a wireless signal at the signal input and generates a first quality signal responsive to the received wireless signal. A switch selects one of the antennae for coupling to the input of the asynchronous receiver circuit responsive to a control signal. A controller receives the first quality signal and generates the switching control signal. The controller sequentially selects each one of the antennae, measures the first quality signal and starts a timer with a time value for the selected antenna. The controller selects a next one of the antennae if the measured first quality signal value is below a threshold value and the timer expires and receives a remainder of a data packet based on the measured first signal quality values for the plurality of antennae.
49 Citations
20 Claims
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1. An asynchronous receiver system comprising:
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a plurality of antennae; an asynchronous receiver circuit having a signal input, the asynchronous receiver circuit being configured to asynchronously receive a wireless signal at the signal input, the asynchronous receiver circuit being further configured to generate at least a first quality signal responsive to the received wireless signal; a switch configured to controllably select one of the plurality of antennae for coupling to the input of the asynchronous receiver circuit responsive to a control signal; a controller configured to receive the first quality signal and generate the switching control signal, where the controller is configured to sequentially select each one of the plurality of antennae, measure the first quality signal and start a timer with a time value for the selected antenna, select a next one of the plurality of antennae if the timer expires, store the measured values for the first quality signal, and select one of the plurality of antenna to receive a remainder of a data packet based on the measured first signal quality values for the plurality of antennae. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for asynchronously receiving a data packet in an antenna diversity receiver having multiple antennas, the method comprising the steps of:
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generating a first quality signal for a received signal; sequentially selecting each of the antennas and, for each selected antenna, measuring a first quality signal and starting a timer with a time value for the selected antenna, selecting a next one of the antennas if the measured first quality signal value is below a first threshold value and the timer expires, and receiving a remainder of a data packet based on the measured first signal quality values for the plurality of antennae. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A system for asynchronously receiving a data packet in an antenna diversity receiver having multiple antennas, the system comprising:
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means for generating a first quality signal for a received signal; means for sequentially selecting each of the antennas and, for each selected antenna, measuring a first quality signal and starting a timer with a time value for the selected antenna, selecting a next one of the antennas if the measured first quality signal value is below a threshold value and the timer expires, and receiving a remainder of a data packet based on the measured first signal quality values for the plurality of antennae. - View Dependent Claims (20)
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Specification