Adaptive diversity receiver architecture
First Claim
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1. A diversity receiver circuit comprising the following:
- a first receiver configured to receive a first representation of a signal on a first antenna and process the first representation of the signal;
a second receiver configured to receive a second representation of the signal on a second antenna and process the second represent of the signal; and
means for adaptively phase shift summing the processed first and second representations of the signal only if the processed first and second representations have sufficient strength, and otherwise selecting only one of the processed first and second representations of the signal for further processing.
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Abstract
A diversity receiver circuit that adaptively selects a variable number of one or more antennas for use in improving signal quality. Each antenna is provided its own receiver that each generates a representation of a received signal. This adaptive selection offers high dynamic adaptability in using the appropriate antennas and receivers at the appropriate time to thereby improving signal-to-noise ratio. The receivers may be direct conversion receivers that implement up-conversion of the baseband signal to reduce DC offset and 1/f noise characteristic of direct conversion architectures.
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Citations
29 Claims
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1. A diversity receiver circuit comprising the following:
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a first receiver configured to receive a first representation of a signal on a first antenna and process the first representation of the signal;
a second receiver configured to receive a second representation of the signal on a second antenna and process the second represent of the signal; and
means for adaptively phase shift summing the processed first and second representations of the signal only if the processed first and second representations have sufficient strength, and otherwise selecting only one of the processed first and second representations of the signal for further processing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A diversity receiver circuit comprising the following:
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a first receiver configured to receive a first representation of a signal on a first antenna and process the first representation of the signal;
a second receiver configured to receive a second representation of the signal on a second antenna and process the second represent of the signal;
a phase shifter configured to receive the processed first representation of the signal at least when the processed first representation of the signal exceeds a first threshold value, the phase shifter further configured to generate a phase shifted version of the processed first representation of the signal at least when the processed first representation of the signal exceeds the first threshold value; and
a summer configured to sum the phase shifted version of the processed first representation of the signal with the processed second representation of the signal at least when both of the following conditions are true;
the processed first representation of the signal exceeds the first threshold value, and the processed second representation of the signal exceeds a second threshold value. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification