A Novel Nonlinear Precoding Algorithm for the Downlink of Multiple Antenna Multi-User Systems
Tóm tắt
By pre-equalizing inter-stream interference at the transmitter, Tomlinson–Harashima precoding (THP) algorithm provides a solution for the downlink of multiple antenna multi-user systems, in which the decentralized structure of the receivers makes the receiver-processing impossible. However, for the zero-forcing (ZF) THP algorithm available in the literature there are significant performance differences between specific mobile stations. In this paper, a novel version of the THP algorithm is proposed. It greatly improves the worst mobile's performance and ensures balanced performance of all the mobiles. For the new THP algorithm, better performance can be obtained by suitably ordering the rows of the channel matrix. We show that the “best-first” ordering method achieves optimal order for BER performance in systems with two mobile stations and achieves near optimal order in systems with more than two mobile stations. Simulation is used to show the advantages of the new THP algorithm and the “best-first” ordering method.
Tài liệu tham khảo
E. Telatar, “Capacity of Multi-Antenna Gaussian Channels”, European Transactions on Telecommunications, vol. 10, pp. 585–595, November/December 1999.
G.J. Foschini and M.J. Gans, “On Limits of Wireless Communications in a Fading Environment when Using Multiple Antennas”, Wireless Personal Communications, vol. 6, pp. 311–335, March 1998.
S. Vishwanath, N. Jindal and A. Goldsmith, “Duality, Achievable Rates, and Sum-Rate Capacity of Gaussian MIMO Broadcast Channels”, IEEE Trans. Inform. Theory, vol. 49, pp. 2658–2668, October 2003.
P. Viswanath and D.N.C. Tse, “Sum Capacity of the Vector Gaussian Broadcast Channel and Uplink-Downlink Duality”, IEEE Trans. Inform. Theory, vol. 49, pp. 1912–1921, August 2003.
G. Caire and S. Shamai, “On the Achievable Throughput of a Multiantenna Gaussian Broadcast Channel”, IEEE Trans. Inform. Theory, vol. 49, pp. 1691–1706, July 2003.
G.J. Foschini, “Layered Space-Time Architecture for Wireless Communication in A Fading Environment when Using Multielement Antennas”, Bell Labs Technical Journal, pp. 41–59, Autumn 1996.
P.W. Wolniansky, G.J. Foschini, G.D. Golden and R.A. Valenzuela, “V-BLAST: An Architecture for Realizing Very High Data Rates Over the Rich-Scattering Wireless Channel”, in Proc. ISSSE'98, pp. 295–300.
B. Hassibi, “An Efficient Square-Root Algorithm for BLAST”, in Proc. ICASSP'00, vol. 2, pp. 737–740.
B.A. Bjerke and J.G. Proakis, “Multiple-Antenna Diversity Techniques for Transmission Over Fading Channels”, in Proc. WCNC'99, vol. 3, pp. 1038–1042.
W.J. Choi, R. Negi, and J.M. Cioffi, “Combined ML and DFE Decoding for the V-BLAST System”, in Proc. ICC'00, vol. 3, pp. 1243–1248.
X. Li, H.C. Huang, A. Lozano, and G.J. Foschini, “Reduced-Complexity Detection Algorithms for Systems Using Multi-Element Arrays”, in Proc. GLOBECOM'00, vol. 2, pp. 1072–1076.
J. Benesty, Y. Huang and J. Chen, “A Fast Recursive Algorithm for Optimum Sequential Signal Detection in a BLAST System”, IEEE Transactions Signal Processing, vol. 51, pp. 1722–1730, July 2003.
B.R. Vojcic and W.M. Jang, “Transmitter Precoding in Synchronous Multiuser Communications”, IEEE Trans. Commun., vol. 46, pp. 1346–1355, October 1998.
M. Joham, K. Kusume, M.H. Gzara, W. Utschick and J.A. Nossek, “Transmit Wiener Filter for the Downlink of TDD DS-CDMA Systems”, in Proc. ISSSTA'02, vol. 1, pp. 9–13.
J. Liu and W.A. Krzymień, “Signal Detection and Pre-Processing Algorithms in Layered Space-Time Multiple Input Multiple Output Antenna Systems”, in Proc. Wireless'04, Calgary, Canada, pp. 9–21.
R.F.H. Fischer, Precoding and Signal Shaping for Digital Transmission. New York: John Wiley & Sons, 2002.
C. Windpassinger, R.F.H. Fischer, T. Vencel and J.B. Huber, “Precoding in Multiantenna and Multiuser Communications”, IEEE Trans. Wireless Commun., vol. 3, pp. 1305–1316, July 2004.
M. Tomlinson, “New Automatic Equaliser Employing Modulo Arithmetic”, Electron. Lett., vol. 7, pp. 138–139, March 1971.
H. Harashima and H. Miyakawa, “A Method of Code Conversion for Digital Communication Channels with Intersymbol Interference”, Transactions of the Institute of Electronics and Communications Engineers of Japan, pp. 272–273, June 1969.
H. Harashima and H. Miyakawa, “Matched-Transmission Technique for Channels with Intersymbol Interference”, IEEE Trans. Commun., pp. 774–780, August 1972.
G.H. Golub and C.F. Van Loan, Matrix Computations. Baltimore, MD: Johns Hopkins University Press, 1996.
T. Haustein, M. Schubert and H. Boche, “On Power Reduction Strategies for the Multi-User Downlink with Decentralized Receivers”, in Proc. VTC'03, Spring, pp. 1007–1011.
A. Edelman, “Eigenvalues and Condition Numbers of Random Matrices”, Ph.D. dissertation, Cambridge, MA: MIT, May 1989.
M.S. Bartlett, “On the Theory of Statistical Regression”, in Proc. Royal Soc. Edinb., vol. 53, pp. 260–283, 1993.
J. Liu and W.A. Krzymień, “Improved Tomlinson-Harashima Precoding for the Downlink of Multiple Antenna Multi-User Systems”, in Proc. WCNC'05, pp. 466–472.
J. Liu and W.A. Krzymień, “A Novel Nonlinear Precoding Algorithm for the Downlink of Multiple Antenna Multi-User System”, in Proc. VTC’05-Spring, pp. 887–891.