A Multiple Input-Multiple Output (MIMO) Adaptive Decision Feedback Equalizer (DFE) with Cancellation for Wideband Space-Time Communications

A new receiver structure able to deliver high data rates in a multiple input-multiple output (MIMO) frequency selective wireless environment is proposed and investigated in this paper. The optimal solution for the finite-length MIMO decision feedback equalizer (DFE) with cancellation is derived and used to illustrate the potential of this architecture for space-time communications. LMS and RLS adaptive algorithms are also presented for the MIMO architecture. The convergence and performance of these adaptive algorithms is analyzed through simulation results. The proposed adaptive solutions do not require channel identification, are less computationally intensive than their optimal solution counterpart, and allow the proposed MIMO receiver to seamlessly adapt to channel changes.

[1]  Reinaldo A. Valenzuela,et al.  Simplified processing for high spectral efficiency wireless communication employing multi-element arrays , 1999, IEEE J. Sel. Areas Commun..

[2]  A. Robert Calderbank,et al.  A space-time coding modem for high-data-rate wireless communications , 1998, IEEE J. Sel. Areas Commun..

[3]  B. Hassibi,et al.  Adaptive equalization of multiple-input multiple-output (MIMO) frequency selective channels , 1999, Conference Record of the Thirty-Third Asilomar Conference on Signals, Systems, and Computers (Cat. No.CH37020).

[4]  Simon Haykin,et al.  Adaptive filter theory (2nd ed.) , 1991 .

[5]  John M. Cioffi,et al.  Spatio-temporal coding for wireless communications , 1996, Proceedings of GLOBECOM'96. 1996 IEEE Global Telecommunications Conference.

[6]  A.H. Sayed,et al.  A computationally-efficient FIR MMSE-DFE for multi-user communications , 1999, Conference Record of the Thirty-Third Asilomar Conference on Signals, Systems, and Computers (Cat. No.CH37020).

[7]  John M. Cioffi,et al.  Multiple input/multiple output (MIMO) equalization for space-time block coding , 1999, 1999 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (PACRIM 1999). Conference Proceedings (Cat. No.99CH36368).

[8]  Reinaldo A. Valenzuela,et al.  Detection algorithm and initial laboratory results using V-BLAST space-time communication architecture , 1999 .

[9]  S. Haykin,et al.  Adaptive Filter Theory , 1986 .

[10]  Vahid Tarokh,et al.  Space-time coded OFDM for high data-rate wireless communication over wideband channels , 1998, VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151).

[11]  Gerard J. Foschini,et al.  Layered space-time architecture for wireless communication in a fading environment when using multi-element antennas , 1996, Bell Labs Technical Journal.

[12]  Harish Viswanathan,et al.  Achieving high data rates in CDMA systems using BLAST techniques , 1999, Seamless Interconnection for Universal Services. Global Telecommunications Conference. GLOBECOM'99. (Cat. No.99CH37042).

[13]  Aaas News,et al.  Book Reviews , 1893, Buffalo Medical and Surgical Journal.

[14]  J. Yang,et al.  Joint transmitter-receiver optimization for multi-input multi-output systems with decision feedback , 1994, IEEE Trans. Inf. Theory.