Bulletins from the Pacific Packet Radio Society - page 145

Offset QPSK Modulation", IEEE Transactions on Communication, Vol. COM-24, No. 8, August 1976

\PAS79} S. Pasupathy, "Minimum Shift Keying: A Spectrally Efficient Modulation", IEEE Communications Magazine, Vol. 17, No. 49 pp. 14-22, July 1979

Comparisons with Other Techniques -

There are several articles which compare MSK and other modulation techniques, with special emphasis on useable signal-to-noise ratios and required bandwidth. The canonical paper is by John Oetting \OET79}, who compares ALL known modes, and provides a bonus of a extensive bibliography on all of the techniques. Feher and his group have looked at the problem of use on satellites in \LEN82}. A few other pertinent comparisons are included here.

\HIR811 W. Hirt & S. Pasupathy, "Suboptimal Reception of Binary CPSK Signals", IEE PROC., Vol. 128, Pt. F, No. 3, pp- 125-34, June 1981

\LEN82} T. Le-Ngoe, K. Ferer & H. Pham Van, "New Modulation Techniques for Low-Cost Power and Bandwidth Efficient Satellite Earth Stations", IEEE Transactions on Communications, Vol. COM-30, No. 1, January 1982

\MIL81) L. Milstein, D. Shilling & R. Pickholtz, "Comparison of Performance of 16-ary QASK and MSK Over a Frequency Selective Rician Fading Channel", IEEE Transactions on Communications, Vol. COM-29, No. 11, November 1981

\OET79} J. Oetting, "A Comparison of Modulation Techniques for Digital Radio", IEEE Transactions on Communications, Vol. COM-27, No. 12, pp. 1752-62, December 1979

\TEY79} W. Tey & T. Tjhung, "Characteristics of Manchester-Coded FSK", IEEE Transactions on Communications, Vol. COM-27, No. 1, pp. 209-16, January 1979

Filtering -

The utility of MSK has been shown to improve with adequate pre-filtering of the input signal. Morais and Feher \MOR80} give an excellent overview of the effects of filtering and limiting. \BAY79} and \RAB78} discuss bandwidth shaping, and \MUR811 and \SUZ81 } explore the use of Gaussian filtering.

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