Receiver for antenna switching diversity systems
First Claim
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1. A receiver for use in switching diversity systems having at least two antennas for reception, comprising:
- switching means responsive to an antenna switching signal for switching between said two antennas to produce a received signal;
noise estimating means for producing a first signal indicative of the quantity of noise in the received signal; and
an integrating means adapted to respond to the first signal for integrating the noise to produce a first control signal as said antenna switching signal.
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Abstract
A receiver comprising a switching circuit responsive to an antenna switching signal for switching between two antennas to produce a received signal, a noise estimating circuit for estimating the quantity of noise from the received signal, and an integrating circuit for integrating the noise to produce a first control signal which serves as the antenna switching signal.
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Citations
11 Claims
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1. A receiver for use in switching diversity systems having at least two antennas for reception, comprising:
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switching means responsive to an antenna switching signal for switching between said two antennas to produce a received signal; noise estimating means for producing a first signal indicative of the quantity of noise in the received signal; and an integrating means adapted to respond to the first signal for integrating the noise to produce a first control signal as said antenna switching signal. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A receiver for use in switching diversity systems having at least two antennas for reception, comprising:
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switching means responsive to an antenna switching signal for switching between said two antennas to produce a received signal; noise estimating means for producing a first signal indicative of the quantity of noise in the received signal; an integrating means adapted to respond to the first signal for integrating the noise to produce a first control signal as said antenna switching signal; power detecting means for producing a second signal indicative of the power of the received signal from said switching means; memory means adapted to respond to the antenna switching signal for storing said second signal as a threshold signal for antenna switching; first comparator means for comparing said second signal with the threshold from said memory and for generating a second control signal when said second signal is smaller than the threshold from said memory means; and gating means responsive to said first and second control signals for producing said antenna switching signal. - View Dependent Claims (8, 9, 10, 11)
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Specification