A Cross Layer Optimization Based on Variable-Power AMC and ARQ for MIMO Systems

Shu-Ming Tseng; Wei-Shun Lei

doi:10.4236/ijcns.2010.35066

Home > Journals > Computer Science & Communications > IJCNS

International Journal of Communications,... > Vol.3 No.5, May 2010

A Cross Layer Optimization Based on Variable-Power AMC and ARQ for MIMO Systems ()

Shu-Ming Tseng, Wei-Shun Lei

DOI: 10.4236/ijcns.2010.35066 PDF 3,976 Downloads 7,507 Views

Abstract

To improve spectrum efficiency (SE), the adaptive modulation and coding (AMC) and automatic repeat request (ARQ) scheme have been combined for MIMO systems. In this paper, we add variable power subject to power constraint in each AMC mode. We use KKT optimization algorithm to get the optimal transmit power and AMC mode boundaries. The numerical results show that the average SE is increased by about 0.5 bps/Hz for 2 × 2 MIMO systems with Nakagami fading with parameter m = 2 when SNR is around 15 dB and the ARQ retransmission is twice.

Keywords

Transmitter Power Control, Spectrum Efficiency

Share and Cite:

S. Tseng and W. Lei, "A Cross Layer Optimization Based on Variable-Power AMC and ARQ for MIMO Systems," International Journal of Communications, Network and System Sciences, Vol. 3 No. 5, 2010, pp. 488-493. doi: 10.4236/ijcns.2010.35066.

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	X. Zhang, J. Tang, H. H. Chen, S. Ci and M. Guizani, “Cross-Layer-Based Modeling for Quality of Service Guarantees in Mobile Wireless Networks,” IEEE Communications Magazine, Vol. 44, No. 1, January 2006, pp. 100-106.
[2]	Q. Liu, S. Zhou and G. B. Giannakis, “Cross-Layer Combining of Adaptive Modulation and Coding with Truncated ARQ over Wireless Links,” IEEE Transactions on Wireless Communications, Vol. 3, No. 5, September 2004, pp. 1746-1755.
[3]	J. S. Harsini and F. Lahouti, “Optimized Link Adaptation for Wireless Packet Communications Based on Discrete-Rate Modulation and Coding Schemes,” IEEE Workshop Signal Processing Advances in Wireless Communications, Helsinki, June 2007, pp. 17-20.
[4]	A. Jafari and A. Mohammadi, “A Cross Layer Approach Based on Adaptive Modulation and Truncated ARQ for MIMO Systems,” Processing IEEE International Conference on Telecommunications and Malaysia International Conference on Communications, Penang, May 2007, pp. 260-265.
[5]	A. Doufexi, S. Armour, M. Butler, A. Nix, D. Bull, J. McGeehan and P. Karlsson, “A Comparison of The HIPERLAN/2 & IEEE 802.11a Wireless LAN Standards,” IEEE Communications Magazine, Vol. 40, No. 5, May 2002, pp. 172-180.