Citation
Abstract
Drop-lock relationships for the second-order phase-locked loop are derived when the carrier and a sinusoidal interference signal lie within the predetection filter bandwidth of the Block IV receiver. Limiter suppression factors are calculated when a bandpass hard limiter is used to maintain constant total power at the loop. The parameters of interest are the interference-to-signal power ratio (ISR), the input signal-to-noise power ratio (SNR), and the interference signal frequency offset from carrier Af. Limiter suppression caused by the combined effects of the noise and the interference signal accounts for the variability in the drop-lock threshold for given values of the input SNR and ISR parameters. This article goes beyond earlier published work that focused on the limiter’s effect on the drop-lock threshold; it accounts for the limiter action in the interference mode and provides an overall improvement in the prediction accuracy of the drop-lock model.
Details
- Volume
- 42-99
- Published
- November 15, 1989
- Pages
- 161–169
- File Size
- 326.7 KB