Performance of Layered Steered Space---Time Codes in Wireless Systems

Authors:
Ahmad S. Salim;Salam A. Zummo;Samir N. Al-Ghadhban
Affiliations:
School of Electrical, Computer and Energy Engineering (ECEE), Arizona State University, Tempe, USA AZ 85287---5706;Electrical Engineering Department, King Fahd University of Petroleum and Minerals (KFUPM), Dhahran, Saudi Arabia 31261;Electrical Engineering Department, King Fahd University of Petroleum and Minerals (KFUPM), Dhahran, Saudi Arabia 31261
Venue:
Wireless Personal Communications: An International Journal
Year:
2013

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Abstract

Layered Steered Space---Time Codes (LSSTC) is a recently proposed multiple-input multiple-output (MIMO) system that combines the benefits of vertical Bell Labs space---time (VBLAST) scheme, space---time block codes (STBC) and beamforming. In this paper, we derive the error performance and capacity of a single-user LSSTC system. The analysis is general enough to any layer ordering and modulation schemes used. In addition, the derived analysis is general for any LSSTC structure in which layers may have different number of antenna arrays and may be assigned power according to any power allocation. Furthermore, we analytically investigate the tradeoff between the main parameters of the LSSTC system, i.e., diversity, multiplexing and beamforming. Our results give recursive expressions for the probability of error for LSSTC which showed nearly perfect match to the simulation results. Results have also revealed the possibility of designing an adaptive system in which it was shown that combining beamforming, STBC, and VBLAST has better performance than VBLAST at high SNR range.