FUNDAMENTAL ACCURACY LIMITATIONS FOR PILOT-TONE TIME-BASE CORRECTION,
Abstract
Wiener filtering concepts are applied to the problem of determining the accuracy limitations for a pilot-tone time-base correction system. In this system, the correction is accomplished by the addition of a stable sinusoid in a clear area of the signal baseband. After transmission through a medium with varying time delay and additive noise, the pilot tone is recovered by a tracking filter, The output of the tracking filter can be used to estimate the variations intime delay of the transmission medium. A statistical optimization is then performed to find the minimum residual time-base error in the desired signal after correction by such a system. The theory of parameter estimation indicates that the system described is near optimum and represents a lower bound on achievable accuracy. The results for the special case of white bandlimited time-delay variations are presented in the form of curves. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 10, 1964
- Accession Number
- AD0430464
Entities
People
- Jean A. Develet Jr.
Organizations
- The Aerospace Corporation