Single-channel blind equalization for GSM cellular systems

This paper focuses on the study of blind equalization global system for mobile communications (GSM) systems using a single antenna. In order to utilize the well-known linear system model in conventional studies of blind equalization, an equivalent baseband quadrature amplitude modulation (QAM) approximation is used for the nonlinear GMSK signal in GSM systems. Since the GMSK signal in GSM has very little excess bandwidth to warrant oversampling, a derotation scheme is developed to create two subchannels for each received GMSK signal sampled at the baud rate. Linear approximation of the GMSK signal makes the traditional QAM blind equalization system model applicable for GSM. Derotation induces channel diversity without an additional antenna and reduces the number of necessary radio frequency (RF) receivers (sensors) without increasing hardware or computational costs. Several second-order statistical and higher order statistical methods of blind equalization are adopted for GSM signals.

[1]  A. Paulraj,et al.  Blind estimation of multiple co-channel digital signals using an antenna array , 1994, IEEE Signal Processing Letters.

[2]  Giuliano Benelli,et al.  Some Digital Receivers for the GSM Pan-European Cellular Communication System , 1994 .

[3]  Pierre A. Laurent,et al.  Exact and Approximate Construction of Digital Phase Modulations by Superposition of Amplitude Modulated Pulses (AMP) , 1986, IEEE Trans. Commun..

[4]  Lang Tong,et al.  Blind identification and equalization based on second-order statistics: a time domain approach , 1994, IEEE Trans. Inf. Theory.

[5]  Yingbo Hua,et al.  Fast maximum likelihood for blind identification of multiple FIR channels , 1996, IEEE Trans. Signal Process..

[6]  K. Hirade,et al.  GMSK Modulation for Digital Mobile Radio Telephony , 1981, IEEE Trans. Commun..

[7]  Zhi Ding,et al.  A blind channel identification algorithm based on matrix outer-product , 1996, Proceedings of ICC/SUPERCOMM '96 - International Conference on Communications.

[8]  Dieter Boss,et al.  Blind identification of mixed-phase FIR systems with application to mobile communication channels , 1997, 1997 IEEE International Conference on Acoustics, Speech, and Signal Processing.

[9]  Arogyaswami Paulraj,et al.  Blind separation of synchronous co-channel digital signals using an antenna array. I. Algorithms , 1996, IEEE Trans. Signal Process..

[10]  Philippe Loubaton,et al.  Prediction error method for second-order blind identification , 1997, IEEE Trans. Signal Process..

[11]  Hui Liu,et al.  A deterministic approach to blind identification of multi-channel FIR systems , 1994, Proceedings of ICASSP '94. IEEE International Conference on Acoustics, Speech and Signal Processing.

[12]  D. Slock,et al.  Blind subspace identification of a BPSK communication channel , 1996, Conference Record of The Thirtieth Asilomar Conference on Signals, Systems and Computers.

[13]  G. Benelli,et al.  Simplified Viterbi processors for the GSM Pan-European cellular communication system , 1994 .

[14]  Dirk T. M. Slock,et al.  Blind fractionally-spaced equalization, perfect-reconstruction filter banks and multichannel linear prediction , 1994, Proceedings of ICASSP '94. IEEE International Conference on Acoustics, Speech and Signal Processing.

[15]  Peter Adam Hoeher,et al.  A statistical discrete-time model for the WSSUS multipath channel , 1992 .

[16]  Eric Moulines,et al.  Subspace methods for the blind identification of multichannel FIR filters , 1994, Proceedings of ICASSP '94. IEEE International Conference on Acoustics, Speech and Signal Processing.

[17]  Lang Tong,et al.  A new approach to blind identification and equalization of multipath channels , 1991, [1991] Conference Record of the Twenty-Fifth Asilomar Conference on Signals, Systems & Computers.

[18]  Zhi Ding.  On convergence analysis of fractionally spaced adaptive blind equalizers , 1997, IEEE Trans. Signal Process..

[19]  Ghassan Kawas Kaleh,et al.  Simple coherent receivers for partial response continuous phase modulation , 1989, IEEE J. Sel. Areas Commun..

[20]  Arogyaswami Paulraj,et al.  Singular value analysis of space-time equalization in the GSM mobile system , 1996, 1996 IEEE International Conference on Acoustics, Speech, and Signal Processing Conference Proceedings.

[21]  A. G. Constantinides,et al.  MMSE space-time equalization for GSM cellular systems , 1996, Proceedings of Vehicular Technology Conference - VTC.

[22]  Ehud Weinstein,et al.  Super-exponential methods for blind deconvolution , 1993, IEEE Trans. Inf. Theory.

[23]  Thomas Kailath,et al.  Detection of signals by information theoretic criteria , 1985, IEEE Trans. Acoust. Speech Signal Process..

[24]  Zhi Ding,et al.  A semi-blind channel identification method for GSM receivers , 1998, Proceedings of the 1998 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP '98 (Cat. No.98CH36181).

[25]  Zhi Ding,et al.  Global convergence of fractionally spaced Godard (CMA) adaptive equalizers , 1996, IEEE Trans. Signal Process..