NDLI: Studies on Fundamental Properties of MMFSK Systems

Content Provider	IEEE Xplore Digital Library
Author	Nojiri, Y. Tachikawa, S. Marubayashi, G.
Copyright Year	2007
Description	Author affiliation: Nagaoka Univ. of Technol., Niigata (Nojiri, Y.; Tachikawa, S.; Marubayashi, G.)
Abstract	To compare the transmission system suitability for power-line communications the spectral efficiency and the required transmission power are two important fundamental factors. In this paper these two factors are studied for our proposed MMFSK (M-ary multilevel FSK) system. Spectral efficiency eta of MMFSK system is a function of number of frequency levels n, number of time chips L, number of hopping patterns h. An equation connecting eta and n, L, h is derived and quantitative relationships between these parameters are studied. As a comparison spectral efficiency of existing systems such as OFDM, MFSK, multilevel FSK are also shown. Results show that compared to ordinary OFDM systems one tenth of spectral efficiency can be achieved by the proposed system which may not be attained by the other systems. The required transmission power for a fixed error rate directly relates to the radiation power. To obtain the required transmission power, relation between error rates and signal to noise ratio should be clarified. Transmission feature between the output of the transmitter and the input of the receiver for MMFSK is same as that for MFSK and the symbol error probability at the receiver input is same. Difference in bit error rate comes from difference of symbol to bit transformation process. A consideration on the relation between bit error probability and symbol error probability in MMFSK is given and a formula representing worst case probability of bit error is derived. A comparison between the worst case bit error probability and the bit error probability obtained by a simulation is shown. Using these results it is cleared that the radiation power of MMFSK is 20~50 times smaller than that of OFDM.
Starting Page	222
Ending Page	227
File Size	427987
Page Count	6
File Format	PDF
ISBN	1424410894
DOI	10.1109/ISPLC.2007.371127
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-03-26
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Error probability Frequency shift keying OFDM Time of arrival estimation Error analysis Equations Joining processes Signal to noise ratio Transmitters Bit error rate
Content Type	Text
Resource Type	Article

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