STUDY AND EXPERIMENTAL INVESTIGATION ON SAMPLING RATE AND ALIASING IN TIME-DIVISION TELEMETRY SYSTEMS
Abstract
A study to determine the effect of (1) data power spectrum and (2) system design parameters on aliasing and data interpolation error was conduc ed. Results are applicable to time-division multiplexed telemetry systems In particular, the results apply to the commonly used PAM-FM, PDM-FM d PCM-F telemetry systems. Data was obtained on the basis of combined analysis and experiment with emphasis on the derivation of experimentally proven design parameters. T HE PROGRAM CON ISTED OF THREE PHASES: (1) A survey was conducted to determine typical telemetry data spectra. (2) Analysis was performed to predict accuracy p rformance of practical data and interpolation filters using selected examples. Included is a more general analysis to determine optimum filter transfer functions, both realizable and non-realizable. (3) Experimental tests using data spectral models were performed to derive proven interpolation accuracy performance on the basis of practical filters and design parameters. The experimental tests utilized a PAM-FM syst to derive an accurate measurement of attainable performance and to indicate when other equipment factors begin to impose a limit on data recovery accuracy.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1962
- Accession Number
- AD0278515
Entities
People
- C. D. Eatough
- D. G. Childers
- J. W. Capps
- W. F. Link