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Performance Analysis of Space-time Codes in Realistic Propagation Environments: A

Summary: 1
Performance Analysis of Space-time Codes in
Realistic Propagation Environments: A
Moment Generating Function-Based
Tharaka A. Lamahewa, Marvin K. Simon, Rodney A. Kennedy and Thushara
D. Abhayapala
In this paper, we derive analytical expressions for the exact pairwise error probability (PEP) of
a space-time coded system operating over spatially correlated fast (constant over the duration of a
symbol) and slow (constant over the length of a code word) fading channels using a moment-
generating function-based approach. We discuss two analytical techniques that can be used to
evaluate the exact-PEPs (and therefore approximate the average bit error probability (BEP)) in closed
form. These analytical expressions are more realistic than previously published PEP expressions
as they fully account for antenna spacing, antenna geometries (Uniform Linear Array, Uniform
Grid Array, Uniform Circular Array, etc.) and scattering models (Uniform, Gaussian, Laplacian,
Von-mises, etc). Inclusion of spatial information in these expressions provides valuable insights
into the physical factors determining the performance of a space-time code. Using these new PEP
expressions, we investigate the effect of antenna spacing, antenna geometries and azimuth power
This work was supported by the Australian Research Council Discovery Grant DP0343804.


Source: Abhayapala, Thushara D. - Department of Information Engineering, Australian National University


Collections: Computer Technologies and Information Sciences