A method for intermodulation noise calculations in a cable television network with HD-MAC, PAL and FM radio signals

Author

Joshi, Richa ; Arnbak, Jens C. ; Prasad, Ramjee

Author_Institution

Delft Univ. of Technol., Netherlands

Volume

38

Issue

3

fYear

1992

fDate

9/1/1992 12:00:00 AM

Firstpage

177

Lastpage

186

Abstract

A statistical method for calculating intermodulation noise in CATV systems whose traffic can be characterized as a sum of a large number of independent signals is presented. The method is demonstrated by calculating the signal-to-intermodulation-noise ratio in the various channels of a prototype cable network supporting HD-MAC, PAL, and FM radio signals. The spectra of these individual signals are simplified in order to perform part of the calculation analytically. It is shown that the signal-to-intermodulation-noise ratio decreases when the total signal power is increased. This method can be used to calculate the necessary back-off of a cable network for a given frequency plan and to determine suitable plans for loading and controlling CATV networks

Keywords

cable television; intermodulation; noise; statistical analysis; CATV networks; FM radio; HD-MAC; PAL; cable back-off; cable television network; frequency plan; independent signals; intermodulation noise calculations; signal-to-intermodulation-noise ratio; statistical method; total signal power; Cable TV; Frequency; HDTV; Intelligent networks; Noise generators; Prototypes; Satellite broadcasting; Signal to noise ratio; Statistical analysis; TV receivers;

fLanguage

English

Journal_Title

Broadcasting, IEEE Transactions on

Publisher

ieee

ISSN

0018-9316

Type

jour

DOI

10.1109/11.158672

Filename

158672