Abstract
This paper compares the spectral efficiency of a hybrid DS/FH-CDMA system employing variants of MFSK modulation. The proposed modulation schemes are: non-coherent MFSK, MFSK-DPSK, and wideband MT-FSK. In each case, the signal to be transmitted is modulated by a high rate BPSK signal (the PN sequence) and then hopped at a rate higher than the symbol rate into different frequency bins that are sufficiently spaced so that the fading process in each frequency bin appears to be independent of the fading in any other frequency bin. The bit error rate performance of each modulation scheme in Rayleigh fading is found by analytical means. Error control coding is also considered. These results are used to find the spectral efficiency of the DS/FH-CDMA system where the multiple access interference is modeled by white Gaussian noise. It will be shown that MFSK with rate 1/2 dual-k coding provides the best results for the cases considered in this paper.
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© 1996 Springer-Verlag Berlin Heidelberg
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D'Amours, C., Yongaço¯glu, A. (1996). Comparison of MFSK variants for a hybrid DS/FH-CDMA system in Rayleigh fading. In: Chouinard, JY., Fortier, P., Gulliver, T.A. (eds) Information Theory and Applications II. CWIT 1995. Lecture Notes in Computer Science, vol 1133. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0025145
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DOI: https://doi.org/10.1007/BFb0025145
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