Accession Number : AD0763592

Title :   Power Spectra of Computer Simulated Frequency Modulation with Digital Minimum Shift Keying and Voice Input.

Descriptive Note : Final rept. Feb 72-Mar 73,

Corporate Author : OFFICE OF TELECOMMUNICATIONS BOULDER COLO INST FOR TELECOMMUNICATION SCIENCES

Personal Author(s) : Dutton,E. J. ; Juroshek,J. R.

Report Date : MAR 1973

Pagination or Media Count : 74

Abstract : A FORTRAN computer program, FMSPECT, which obtains the power spectrum of an FM signal, modulated by a voice signal, a digital signal, and combinations of both is presented. The theory behind the simulation of the voice signal (265-5575 Hz) is described, as well as the theory of simulating an MSK digital signal (2400 bits-per-second). The digital signal is multiplexed onto the voice at 7200 Hz for combined transmission. Sample spectra are shown for various modulation conditions, and the results are presented in the form of graphs and tables. A listing of the program is given in the appendix. (Author)

Descriptors :   (*VOICE COMMUNICATIONS, FREQUENCY MODULATION), INFORMATION THEORY, FOURIER ANALYSIS, POWER SPECTRA, SPECTRUM SIGNATURES, GRAPHICS, CURVE FITTING, COMPUTER PROGRAMS, FREQUENCY SHIFT KEYERS

Subject Categories : Cybernetics
      Voice Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE