Asynchronous Demodulation Method for Four SSB arranged on Frequency Axis in Mobile Radio Path using Hilbert Transform



In this paper, an asynchronous demodulation method for a four-single sideband (SSB) signal arranged on the frequency axis is developed to support burst mode transmission in a mobile radio path and to achieve greater data throughputs. When a reduced pilot carrier is placed at the center of the 4-SSB signal, it is guarded by lower and upper sidebands, that is, this scheme is classified into a tone-in-band (TIB) system. Digital signal processing (DSP) processors are useful for implementing a Hilbert transform. However, we have for a long time neglected introducing it into the demodulation process of SSB signals.

Author Biography

Kazuhiro Daikoku, Retired



W. C. Jakes, Ed., Microwave Mobile Communications, IEEE Press, 1993, ISBN 0-7803-1069-1

K. Daikoku and K. Suwa, “RZ SSB transceiver with equal-gain combiner for speech and data transmission,” Proc. IEEE GLOBECOM’88, Hollywood, FL, USA, pp.26.4.1-26.4.5, 1988, DOI: 10.1109/GLOCOM. 1988.25953

K. Daikoku, “Field test results on JPEG/text file transmission employing RZ SSB transceivers through HF radio channels,” IEE Proc. Communi., vol. 151, no. 1, pp.50-58, 2004, DOI: 10.1049/ip-com:20040347

K. Daikoku, “Hilbert transform applications in asynchronous demodulation for real zero single sideband signals in mobile radio path,” J. Signal Process., vol. 25, no. 1, pp. 11–24, Jan. 2021.

S. L. Hahn, Hilbert Transforms in Signal Processing, Artech House, 1996, ISBN 0-9006-886-0

W. T. Webb and L. Hanzo, Modern Quadrature Amplitude Modulation, Pentech Press, 1994, ISBN 0-7273-1701-6

N. C. Davies, “Digital radio and its application in HF (2-30 MHz) band,” Doctor Thesis to the University of Leeds, May 2004.

R. C. Daniels and S. W. Peters, “A new MIMO HF data link: Designing for high data rates and backwards compatibility,” 2013 IEEE MILCOM, San Diego, CA, USA, pp.1-6, 2013, DOI: 10.1109/MILCOM.2013.214

M. Kuzlu, H. Dinçer and S. Öztürk, “DSP implementation of underwater communication using SSB modulation with random carrier frequencies,” Sci. Res. Essays, vol. 5, no. 10, pp.1084-1099, 2010, ISSN 1992-2248

T. S. Rappaport, Wireless Communications, Prentice Hall, 1996, ISBN 0-13-461088

S. Sampei, S. Komaki and N. Morinaga, “Adaptive modulation/TDMA scheme for large capacity personal multi-media communication systems,” IEICE Trans. Communi., vol. E77-B, no. 9 pp.1096-1103, 1994.

G. Ohta, M. Nanri, M. Uesugi, T. Sato, H. Tominaga, “A study of new modulation method consisted of orthogonal four SSB elements having a common carrier frequency,” The 11th International Symposium on Wireless Personal Multimedia Communications (WPMC 2008), Lapland, Finland, 8–11 Sep. 2008.

M. Nanri, “Transmitter and SSB signal generation method,” US Patent Application Publication, Pub. No.: US 2010/0246710 A1, Pub. Date: Sep. 30, 2010.

A. M. Mustafa, Q. N. Nguyen, T. Sato and G. Ohta, “Four single-sideband M-QAM modulation using soft input soft output equalizer over OFDM,” 2018 28th International Telecommunication Networks and Applications Conference (ITNAC), Sydney, NSW, Australia, 21-23 Nov. 2018, DOI: 10.1109/ATNAC.2018.8615451

M. M. Alhasani, Q. N. Nguyen, G. Ohta, and T. Sato, “A novel four single-sideband M-QAM modulation scheme using a shadow equalizer for MIMO system toward 5G communications,” Sensors, 2019, 9, 1944; DOI:10.3390/s19081944

B. Pitakdumrongkija, H. Suzuki, S. Suyama and K. Fukawa, "Single sideband QPSK with turbo equalization for mobile communications," 2005 IEEE 61st VTC’05, Stockholm, Sweden, pp. 538-542, 30 May-1 June 2005, DOI: 10.1109/VETECS.2005.1543349






Wireless and Mobile Communications