Estimation of the scattering radius around a mobile handset using a sub-space technique

There have been a number of attempts to use experimental data to obtain estimates of the scattering radius of scatterers around transmitters in cellular radio systems. This paper presents a new method of estimating the scattering radius using a linear array antenna at the receiver. The method is based on a sub-space technique for estimating the angle of arrival of the received signals. The new method exploits the decorrelation of the received signal across the multiple antenna elements of a linear array antenna to estimate the angular spread. The concept of the new method is developed and its performance is verified for an eight element antenna array using a Monte-Carlo simulation of a DCS1800 system for two different scattering models. One is a uniform disk of scatterers and the other is a random distribution of scatterers.

[1]  Theodore S. Rappaport,et al.  Overview of spatial channel models for antenna array communication systems , 1998, IEEE Wirel. Commun..

[2]  W. C. Jakes,et al.  Microwave Mobile Communications , 1974 .

[3]  Thomas Kailath,et al.  ESPRIT-estimation of signal parameters via rotational invariance techniques , 1989, IEEE Trans. Acoust. Speech Signal Process..

[4]  Arogyaswami Paulraj,et al.  Space-time processing for wireless communications , 1997 .

[5]  G. V. Tsoulos,et al.  A macrocellular radio channel model for smart antenna tracking algorithms , 1999, 1999 IEEE 49th Vehicular Technology Conference (Cat. No.99CH36363).

[6]  R. O. Schmidt,et al.  Multiple emitter location and signal Parameter estimation , 1986 .

[7]  George V. Tsoulos,et al.  Space division multiple access (SDMA) field trials - Parts I & II : Tracking and BER performance , 1998 .

[8]  A.J. Paulraj,et al.  Space-time processing for wireless communications , 1997, 1997 IEEE International Conference on Acoustics, Speech, and Signal Processing.

[9]  K. Molnar,et al.  The Jakes fading model incorporating angular spread for a disk of scatterers , 1998, VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151).

[10]  R. Piechocki,et al.  Simple general formula for PDF of angle of arrival in large cell operational environments , 1998 .