A method for setting a test signal level relative to noise
Abstract
A method is described for adjusting the level of an RF test signal generator relative to the noise level at the receiver output. The method compares a detected output to a threshold and counts the number of times noise and signal plus noise cross the threshold in a given number of tries. By setting the threshold at a given false alarm probability for noise alone and then adding the test signal and adjusting its level to give a specified detection probability, the signal-to-noise ratio can be calibrated to an accuracy that depends on the number of samples used to measure the probabilities. The false alarm and detection probabilities are given for best accuracy as well as the rms error in signal-to-noise ratio as a function of the number of samples used.
- Publication:
-
IEEE Transactions on Aerospace Electronic Systems
- Pub Date:
- November 1977
- DOI:
- 10.1109/TAES.1977.308512
- Bibcode:
- 1977ITAES..13..707W
- Keywords:
-
- Electronic Equipment Tests;
- Radio Signals;
- Signal Generators;
- Signal To Noise Ratios;
- Test Equipment;
- Calibrating;
- Probability Theory;
- Root-Mean-Square Errors;
- Signal Detection;
- Thresholds;
- Warning Systems;
- Communications and Radar