Coherent averaging for measuring traveling wave tube amplifier nonlinearity
First Claim
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1. A method of measuring a transmission performance characteristic, comprising:
- receiving a signal;
demodulating the signal;
generating an ideal signal from the demodulated signal;
coherently averaging the received signal to reduce noise; and
estimating the performance characteristic from a difference between the ideal signal and the coherently averaged received signal.
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Abstract
A method and system provide the ability to measure a transmission performance characteristic. A signal is received and demodulated. An ideal signal is generated from the demodulated signal. The received signal is coherently averaged to reduce noise. The performance characteristic is the estimated TWTA nonlinearity from a difference between the coherently averaged ideal signal and received signal.
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Citations
22 Claims
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1. A method of measuring a transmission performance characteristic, comprising:
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receiving a signal;
demodulating the signal;
generating an ideal signal from the demodulated signal;
coherently averaging the received signal to reduce noise; and
estimating the performance characteristic from a difference between the ideal signal and the coherently averaged received signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system for measuring a transmission performance characteristic, comprising:
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(a) a demodulator for demodulating a received signal;
(b) a signal generator for producing an ideal signal from the demodulated signal; and
(c) a processor for;
(i) coherently averaging the received signal to reduce noise; and
(ii) estimating the performance characteristic from a difference between the ideal signal and the coherently averaged received signal. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification