Real-time noise-suppression method and apparatus therefor
First Claim
1. A method of noise suppression in a signal measurement system, said method comprising:
- a) providing a first signal;
b) deriving a second signal from said first signal;
c) deriving a third signal from said first signal;
d) analyzing said third signal to determine the presence of noise within said first signal; and
e) compensating, when said analyzing activity d) determines said noise is present within said first signal, said second signal in response to said noise within said first signal.
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Abstract
A thorough error suppression signal measurement system (20) having a transmitter (300) for propagating a transmission signal to a first probe 100, through a device under test (26), and into a second probe (200), and for propagating reference signals to the probes (100,200). The probes (100,200) extract normalization signals from the reference signals, exchange specific ones of the normalization signals, and combine the normalization signals with data signals derived from the transmission signal to form receiver signals. The probes (100,200) propagate the receiver signals to a receiver (400), where the signals are gain-ranged, digitized, normalized, and compensated for phase-noise.
26 Citations
20 Claims
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1. A method of noise suppression in a signal measurement system, said method comprising:
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a) providing a first signal;
b) deriving a second signal from said first signal;
c) deriving a third signal from said first signal;
d) analyzing said third signal to determine the presence of noise within said first signal; and
e) compensating, when said analyzing activity d) determines said noise is present within said first signal, said second signal in response to said noise within said first signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of calibrating a noise channel in a signal measurement system, said method comprising:
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providing a first signal;
producing a second signal;
injecting said second signal into said first signal to produce a third signal, said third signal being a composite of said first signal and said second signal;
deriving a fourth signal from said third signal; and
determining invariant perturbations of said first signal from said fourth signal. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A method of noise suppression in a signal measurement system, said method comprising:
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providing a first signal;
deriving a second signal from said first signal, wherein said second signal is an analog signal;
deriving a third signal from said first signal substantially concurrently with said second signal, wherein said third signal is an analog signal;
converting said second signal into a fourth signal, wherein said fourth signal is a digital signal;
converting said third signal into a fifth signal, wherein said fifth signal is a digital signal;
analyzing said fifth signal to determine the presence of phase noise within said first signal; and
compensating, when said analyzing activity d) determines said phase noise is present within said first signal, said fourth signal in response to said noise within said first signal.
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Specification