For practical realizations of spread-spectrum receivers, automatic threshold level control (ATLC) in synchronization schemes is crucial. A novel ATLC system is described and analyzed. The system uses a fixed threshold which provides a constant false alarm rate (CFAR) independent of signal to noise ratio variations that may be generated due to impulse noise. The in sync/out of sync decision variable is formed by using the ratio of the correlation functions of the input signal and two mutually delayed PN (pseudo-noise) sequences. Numerical results of the system performance analysis are presented and discussed.
GLOBECOM '90 - IEEE Global Telecommunications Conference and Exhibition, Volume 1
- Pub Date:
- False Alarms;
- Spread Spectrum Transmission;
- Probability Theory;
- Signal Detection;
- Communications and Radar