Optimum detection of non-orthogonal QAM signals with spectral overlapping

The authors evaluate and propose two approaches for the detection of two non-orthogonal m-QAM signals with spectral overlapping through an AWGN channel. Some previously reported works are revisited and alternative solutions in order to permit their application in practical communication systems are proposed. The subject method is proved to be relevant because it does not obey the Riesz basis condition for performing signal separation. The optimum maximum-likelihood receiver for this detection problem is also derived and the performance analysis is presented, including some analytical and Monte Carlo simulation results.

[1]  Thomas Strohmer,et al.  Optimal OFDM design for time-frequency dispersive channels , 2003, IEEE Trans. Commun..

[2]  Andreas F. Molisch,et al.  Nonorthogonal pulseshapes for multicarrier communications in doubly dispersive channels , 1998, IEEE J. Sel. Areas Commun..

[3]  S. Weinstein,et al.  Data Transmission by Frequency-Division Multiplexing Using the Discrete Fourier Transform , 1971 .

[4]  Pak-Chung Ching,et al.  Maximum likelihood detection for multicarrier systems employing non-orthogonal pulse shapes , 2000, 2000 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings (Cat. No.00CH37100).

[5]  Mahesh K. Varanasi,et al.  Noncoherent decorrelative detection for nonorthogonal multipulse modulation over the multiuser Gaussian channel , 1998, IEEE Trans. Commun..

[6]  Elvino S. Sousa,et al.  Non-orthogonal CDMA forward link offers flexibility without compromising capacity , 1996, Proceedings of ISSSTA'95 International Symposium on Spread Spectrum Techniques and Applications.

[7]  Dirk Dahlhaus,et al.  Iterative detection for multicarrier transmission employing time-frequency concentrated pulses , 2003, IEEE Trans. Commun..

[8]  L. B. Milstein,et al.  Theory of Spread-Spectrum Communications - A Tutorial , 1982, IEEE Transactions on Communications.

[9]  C.C. Cavalcante,et al.  Detection of non-orthogonal PAM signals with spectral overlapping , 2005, IEEE 6th Workshop on Signal Processing Advances in Wireless Communications, 2005..

[10]  John G. Proakis,et al.  Digital Communications , 1983 .

[11]  Optimum detector to non-orthogonal PAM signals with spectral overlapping , 2006, 2006 International Telecommunications Symposium.

[12]  Rege Romeu Scarabucci,et al.  On the {m-QAM}2 modulation , 2001, IEEE Communications Letters.

[13]  J.A.C. Bingham,et al.  Multicarrier modulation for data transmission: an idea whose time has come , 1990, IEEE Communications Magazine.

[14]  Gerald Matz,et al.  Pulse-shaping OFDM/BFDM systems for time-varying channels: ISI/ICI analysis, optimal pulse design, and efficient implementation , 2002, The 13th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications.

[15]  Roy D. Yates,et al.  Noncoherent Multiuser Communications: Multistage Detection and Selective Filtering , 2002, EURASIP J. Adv. Signal Process..

[16]  L. Scharf,et al.  MMSE multiuser detection for noncoherent non-orthogonal multipulse modulation , 2000, 2000 IEEE International Symposium on Information Theory (Cat. No.00CH37060).

[17]  J. Jones.  Filter Distortion and Intersymbol Interference Effects on PSK Signals , 1971 .