Accession Number : ADA325324

Title :   Generating and Demodulating M-ary CPFSK Using the FFT.

Descriptive Note : Research rept. 1 Oct 96-1 Jan 97,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF ELECTRICAL AND COMPUTER ENGINEE RING

Personal Author(s) : Moose, Paul H.

PDF Url : ADA325324

Report Date : 05 MAR 1997

Pagination or Media Count : 32

Abstract : This paper discusses a technique for modulating and demodulating M-ary CPFSK using an FFT based modem typical of Coded Orthogonal Frequency Division Modulation (COFDM), also known as Discrete Multi-Tone (DMT), systems. COFDM is one of the more promising spectrally efficient, high data rate modulation techniques for mobile digital communications. This paper shows that legacy CPFSK radios like the AN/GRC-226 (binary CPFSK at 256, 512, 1024, and 2048 kbps) used by the U.S. Army could be easily implemented in a DMT modem originally designed for higher data rate and better spectral efficiency than the legacy radio. MATLAB code is included that simulates the modem.

Descriptors :   *FAST FOURIER TRANSFORMS, *FREQUENCY SHIFT KEYERS, HIGH RATE, EFFICIENCY, SPECTRA, MOBILE, RADIO EQUIPMENT, DATA RATE, MODEMS, DIGITAL COMMUNICATIONS.

Subject Categories : Statistics and Probability
      Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE