Performance of Adaptive Transmit Diversity with Orthogonal Space-Time Block Coding in Microcell and Macrocell Channel Environments

Recently an adaptive transmit eigenbeamforming with orthogonal space-time block coding (Eigen-OSTBC) has been proposed. This model was simulated over macrocell environment with a uniform linear array (ULA) at the base station (BS). In this paper we investigate the impact of various antenna geometries on the performance of this scheme as well as the performance over microcell and macrocell channel environments. The geometrical-based hyperbolically distributed scatterers (GB- HDS) channel models were simulated with angular spreads (AS) taken from experimental data. The ULA and the uniform circular array (UCA) are considered at the BS. In the simulation conducted, results have shown that the Eigen-OSTBC system has a higher performance gain than OSTBC systems in macrocell than microcell environment (where the AS gets larger). It is also observed that BS antenna array with different separation distances also affects the performance of both Eigen-OSTBC and OSTBC systems. However, the error-rate performance curves of ULA and UCA configurations are very similar.

[1]  A. Robert Calderbank,et al.  Space-time block coding for wireless communications: performance results , 1999, IEEE J. Sel. Areas Commun..

[2]  Michael A. Jensen,et al.  Modeling the statistical time and angle of arrival characteristics of an indoor multipath channel , 2000, IEEE Journal on Selected Areas in Communications.

[3]  Zahir M. Hussain,et al.  A geometrical-based channel model with hyperbolically distributed scatterers for a macrocell mobile environment with antenna array , 2004 .

[4]  H. Bolcskei,et al.  Performance of space-time codes in the presence of spatial fading correlation , 2000, Conference Record of the Thirty-Fourth Asilomar Conference on Signals, Systems and Computers (Cat. No.00CH37154).

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

[6]  Ramakrishna Janaswamy,et al.  Angle and time of arrival statistics for the Gaussian scatter density model , 2002, IEEE Trans. Wirel. Commun..

[7]  J.E. Mazo,et al.  Digital communications , 1985, Proceedings of the IEEE.

[8]  Ran Gozali,et al.  Space-Time Codes for High Data Rate Wireless Communications , 2002 .

[9]  A. Robert Calderbank,et al.  Space-Time block codes from orthogonal designs , 1999, IEEE Trans. Inf. Theory.

[10]  Z.M. Hussain,et al.  Space-time OFDM with adaptive beamforming: performance in spatially correlated channels , 2004, 2004 IEEE Region 10 Conference TENCON 2004..

[11]  Preben E. Mogensen,et al.  A stochastic model of the temporal and azimuthal dispersion seen at the base station in outdoor propagation environments , 2000, IEEE Trans. Veh. Technol..

[12]  Joseph M. Kahn,et al.  Fading correlation and its effect on the capacity of multielement antenna systems , 2000, IEEE Trans. Commun..

[13]  Z.M. Hussain,et al.  A multipath mobile channel model for microcell environment , 2004, Eighth IEEE International Symposium on Spread Spectrum Techniques and Applications - Programme and Book of Abstracts (IEEE Cat. No.04TH8738).