Joint selection of the parameters of a minimum-shift frequency-keyed complex signal and a matched surface-acoustic-wave filter

Authors

  • N. I. Smirnov
  • Yu. A. Karavaev
  • S. F. Gorgadze

DOI:

https://doi.org/10.3103/S073527271990070172

Abstract

It is ever more frequently the practice to use frequency-keyed complex signals with minimum shift along with phase-keyed signals in order to increase the efficiency with which the frequency band assigned to a system for transmitting information in complex signals (CS) is utilized. For an identical cycling frequency fc of the main lobe of the spectrum of a frequency keyed complex signal with minimum shift (FK-MS) is already 133 times greater than it is for a phase-keyed (PK) complex signal and contains 99.5% of the total energy (against 92% for a PK complex signal), while the level of the first sidelobe is –23 dB relative to the main lobe (compared to –13 dB for a PK complex signal).

References

SMITH, W.R. SAW filters for CPSM spread spectrum communication. Proc. of Ultrasonics Symp., 26-28 Oct. 1977, Phoenix, AZ, USA. IEEE, 1977, pp. 524-528. DOI: https://doi.org/10.1109/ULTSYM.1977.196891.

MALOCHA, D.C.; GOLL, J.H.; HEARD, M.A. Design of a compensated SAW filter used in a wide spread MSK waveform generator. Proc. of Ultrasonics Symp., 26-28 Sept. 1979, New Orleans, LA, USA. IEEE, 1979, pp. 518-521. DOI: https://doi.org/10.1109/ULTSYM.1979.197256.

SMIRNOV, N.I.; KARAVAEV, Y.A. Estimating the reliability of programmed matched SAW filters. Radioelectron. Commun. Syst., vol. 25, no. 3, pp. 27-32, 1982.

KARAVAEV, Y.A.; SMIRNOV, A.A.; SMIRNOV, N.I.; FOKIN, N.I. Matched SAW filters for wide-band communications systems. Elektronnaya Promyshlennost, no. 8, pp. 67-71, 1983.

Published

1990-07-17

Issue

Section

Brief Communications