Implementation of OFDM modulation by using real arithmetic
DOI:
https://doi.org/10.3103/S0735272713120030Keywords:
modulation, demodulation, orthogonal frequency division multiplexing, OFDM, fast Fourier transform, fast Hartley transform, quadrature-amplitude modulation, QAM, modulator, demodulatorAbstract
A method of generating the OFDM signal by using the discrete Hartley transform has been presented. This method makes it possible to essentially simplify the modulation and demodulation processes in data transmission systems where data are formed from real data streams including bit streams. A distinctive feature of the proposed method of generating the OFDM signal implies the use of the Hartley transform with subsequent appropriate data stream manipulation making it possible to abandon the use of the QAM modulator and demodulator.
References
CHANG, ROBERT W. Synthesis of band-limited orthogonal signal for multichannel data transmission. Bell Sys. Tech. J., v.45, n.10, p.1775-1796, 1966. doi: http://dx.doi.org/10.1002/j.1538-7305.1966.tb02435.x">10.1002/j.1538-7305.1966.tb02435.x.
LIN, YUAN-PEI; PHOONG, SEE-MAY; VAIDYANATHAN, P.P. Filter Bank Transceivers for OFDM and DMT Systems. New York: Cambridge University Press, 2010.
JANKIRAMAN, MOHINDER. Space-Time Codes and MIMO Systems. Boston–London: Artech House, 2004.
BALASHOV, V.A.; VOROBIENKO, P.P.; LYAKHOVETSKII, L.M. Transmission Systems Using Orthogonal Harmonic Signals. Moscow: Eko-Trends, 2012 [in Russian].
SERGIENKO, A.B. Digital Processing of Signals. St. Petersburg: Piter, 2003 [in Russian].
KOKHANOV, A.B. AND ZAKHAROV, V.V. Orthogonal multicarrier modulation with the use of Hartley’s transform. Izv. Vyssh. Uchebn. Zaved., Radioelektron., v.47, n.11, p.38-45, 2004 [in Russian]. Radioelectron. Commun. Syst., v.47, n.11, p.30-36, 2004.
WANG, CHIN-LIANG; CHANG, CHING-HSIEN; FAN, JOHON L.; CIOFFI, JOHN M. Discrete Hartley transform based multicarrier modulation. Proc. of IEEE Int. Conf. “Acoustics, Speech and Signal Processing,” ICASSP’00, June 5–9, 2000, Istanbul, Turkey. Istanbul, 2000, v.5, p.2513-2516. doi: http://dx.doi.org/10.1109/ICASSP.2000.860954">10.1109/ICASSP.2000.860954.
BRACEWELL, R.N. The fast Hartley transform algorithm. Proc. IEEE, v.72, n.8, p.1010-1018, 1984. doi: http://dx.doi.org/10.1109/PROC.1984.12968">10.1109/PROC.1984.12968.
KOKHANOV, A.B. UA Patent No. 63068, 15 June 2004.
