On effects of power reallocation and ordering in V-BLAST systems with adaptive modulation and antenna selection

The power reallocation effect and the ordering effect of interference cancellation (IC) of V-BLAST detectors are evaluated in two different systems, which are the V-BLAST system with antenna selection, and the V-BLAST system with both antenna selection and adaptive modulation. Power reallocation is introduced into the antenna selection process to keep a constant total transmit power. The performance of different IC ordering schemes, i.e. the optimal ordering scheme and the fixed ordering scheme, is compared in these systems through intensive simulations. The performance of optimal antenna selection schemes for both IC algorithms is also determined by searching all sets of transmit antennas extensively. It is shown that the performance of the optimal ordering scheme, in terms of throughput is superior to that of the fixed ordering scheme in the V-BLAST system with antenna selection, at the cost of heavy computational load. In the system with both antenna selection and adaptive modulation, the effect of the ordering is not consistent and the throughput of the optimal ordering scheme may sometimes even be worse than that of the fixed ordering scheme. Furthermore, when some optimal antenna selection scheme could be employed, the fixed ordering algorithm and the optimal ordering algorithm would have nearly the same performance.

[1]  Moe Z. Win,et al.  Capacity of MIMO systems with antenna selection , 2001, IEEE Transactions on Wireless Communications.

[2]  Chi-Ying Tsui,et al.  A low complexity architecture of the V-BLAST system , 2000, 2000 IEEE Wireless Communications and Networking Conference. Conference Record (Cat. No.00TH8540).

[3]  Helmut Bölcskei,et al.  Technologies and performance for non-line-of-sight broadband wireless access networks , 2002, IEEE Commun. Mag..

[4]  J. Skold,et al.  System performance of EDGE, a proposal for enhanced data rates in existing digital cellular systems , 1998, VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151).

[5]  H. Sampath,et al.  Adaptive modulation for multiple antenna systems , 2000, Conference Record of the Thirty-Fourth Asilomar Conference on Signals, Systems and Computers (Cat. No.00CH37154).

[6]  Zhongding Lei,et al.  Performance Comparison of Multiple-Transmit Multiple-Receive V-BLAST Algorithms , 2002, PWC.

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

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

[9]  Velio Tralli,et al.  Improving protocol performance in BLAST-based wireless systems using channel adaptive antenna selection , 2002, Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367).

[10]  Rick S. Blum,et al.  On optimum MIMO with antenna selection , 2002, 2002 IEEE International Conference on Communications. Conference Proceedings. ICC 2002 (Cat. No.02CH37333).

[11]  M. J. Gans,et al.  On Limits of Wireless Communications in a Fading Environment when Using Multiple Antennas , 1998, Wirel. Pers. Commun..

[12]  Robert W. Heath,et al.  Adaptive modulation and MIMO coding for broadband wireless data networks , 2002, IEEE Commun. Mag..

[13]  Francois Chin,et al.  On interference cancellation ordering of V-BLAST detectors , 2003, Fourth International Conference on Information, Communications and Signal Processing, 2003 and the Fourth Pacific Rim Conference on Multimedia. Proceedings of the 2003 Joint.

[14]  Erik G. Larsson,et al.  Orthogonal space-time block coding with antenna selection and power allocation , 2003 .

[15]  L. B. Milstein,et al.  Combined average SNR of a generalized diversity selection combining scheme , 1998, ICC '98. 1998 IEEE International Conference on Communications. Conference Record. Affiliated with SUPERCOMM'98 (Cat. No.98CH36220).

[16]  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.

[17]  Reinaldo A. Valenzuela,et al.  V-BLAST: an architecture for realizing very high data rates over the rich-scattering wireless channel , 1998, 1998 URSI International Symposium on Signals, Systems, and Electronics. Conference Proceedings (Cat. No.98EX167).

[18]  P. Stoica,et al.  A generalized space-time linear precoder and decoder design using the weighted MMSE criterion , 2000, Conference Record of the Thirty-Fourth Asilomar Conference on Signals, Systems and Computers (Cat. No.00CH37154).

[19]  J. Skold,et al.  Radio interface performance of EDGE, a proposal for enhanced data rates in existing digital cellular systems , 1998, VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151).