Redundant filterbank precoders and equalizers. II. Blind channel estimation, synchronization, and direct equalization

For pt.I see ibid., vol.47, no.7, p.1988-2006 (1999). Transmitter redundancy introduced using finite impulse response (FIR) filterbank precoders offers a unifying framework for single- and multiuser transmissions. With minimal rate reduction, FIR filterbank transmitters with trailing zeros allow for perfect (in the absence of noise) equalization of FIR channels with FIR zero-forcing equalizer filterbanks, irrespective of the input color and the channel zero locations. Exploiting this simple form of redundancy, blind channel estimators, block synchronizers, and direct self-recovering equalizing filterbanks are derived in this paper. The resulting algorithms are computationally simple, require small data sizes, can be implemented online, and remain consistent (after appropriate modifications), even at low SNR colored noise. Simulations illustrate applications to blind equalization of downlink CDMA transmissions, multicarrier modulations through channels with deep fades, and superior performance relative to CMA and existing output diversity techniques relying on multiple antennas and fractional sampling.

[1]  Georgios B. Giannakis,et al.  Direct blind equalizers of multiple FIR channels: a deterministic approach , 1996, Conference Record of The Thirtieth Asilomar Conference on Signals, Systems and Computers.

[2]  Gene H. Golub,et al.  Matrix computations , 1983 .

[3]  Per Ola Börjesson,et al.  ML estimation of time and frequency offset in OFDM systems , 1997, IEEE Trans. Signal Process..

[4]  P. Loubaton,et al.  Blind second-order identification of FIR channels: forced cyclostationarity and structured subspace method , 1997, IEEE Signal Processing Letters.

[5]  Jacques Palicot,et al.  A least mean squares blind equalization techniques for OFDM systems , 1997, Ann. des Télécommunications.

[6]  G.B. Giannakis,et al.  Direct blind equalization for transmitter induced cyclostationarity , 1997, First IEEE Signal Processing Workshop on Signal Processing Advances in Wireless Communications.

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

[8]  Xiang-Gen Xia,et al.  New precoding for intersymbol interference cancellation using nonmaximally decimated multirate filterbanks with ideal FIR equalizers , 1997, IEEE Trans. Signal Process..

[9]  Sergio Benedetto,et al.  Digital Transmission Theory , 1987 .

[10]  Ali N. Akansu,et al.  A new look at digital orthogonal transmultiplexers for CDMA communications , 1997, IEEE Trans. Signal Process..

[11]  Leonard J. Cimini,et al.  Analysis and Simulation of a Digital Mobile Channel Using Orthogonal Frequency Division Multiplexing , 1985, IEEE Trans. Commun..

[12]  Stefan Kaiser,et al.  Multi-Carrier Spread Spectrum , 2000, Eur. Trans. Telecommun..

[13]  B. Dickinson Efficient solutions of linear equations with banded Toeplitz matrices , 1979 .

[14]  G. Giannakis Filterbanks for blind channel identification and equalization , 1997, IEEE Signal Processing Letters.

[15]  John M. Cioffi,et al.  A Discrete Multitone Transceiver System for HDSL Applications , 1991, IEEE J. Sel. Areas Commun..

[16]  Georgios B. Giannakis,et al.  Transmitter induced cyclostationarity for blind channel equalization , 1997, IEEE Trans. Signal Process..

[17]  L. Lupas On the computation of the generalized Vandermonde matrix inverse , 1975 .

[18]  Gregory W. Wornell Emerging applications of multirate signal processing and wavelets in digital communications , 1996 .

[19]  Anna Scaglione,et al.  Redundant filterbank precoders and equalizers. I. Unification and optimal designs , 1999, IEEE Trans. Signal Process..

[20]  P. Loubaton,et al.  Blind second-order identification of FIR channels: forced cyclostationarity and structured subspace method , 1997, IEEE Signal Process. Lett..

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

[22]  Philippe Loubaton,et al.  Semi-blind second order identification of convolutive channels , 1997, 1997 IEEE International Conference on Acoustics, Speech, and Signal Processing.

[23]  D. Godard,et al.  Self-Recovering Equalization and Carrier Tracking in Two-Dimensional Data Communication Systems , 1980, IEEE Trans. Commun..

[24]  David Gesbert,et al.  On-line blind multichannel equalization based on mutually referenced filters , 1997, IEEE Trans. Signal Process..

[25]  Eric Moulines,et al.  Subspace methods for the blind identification of multichannel FIR filters , 1995, IEEE Trans. Signal Process..

[26]  T. Kailath,et al.  A least-squares approach to blind channel identification , 1995, IEEE Trans. Signal Process..

[27]  Georgios B. Giannakis,et al.  Blind channel identification and equalization with modulation-induced cyclostationarity , 1998, IEEE Trans. Signal Process..

[28]  Michael A. Tzannes,et al.  Overlapped Discrete Multitone Modulation for High Speed Copper Wire Communication , 2006, IEEE J. Sel. Areas Commun..

[29]  Donald T. Gavel Solution to the problem of instability in banded Toeplitz solvers , 1992, IEEE Trans. Signal Process..

[30]  Framing structure , channel coding and modulation for digital terrestrial television , 2022 .