Real-time 3-D spatial-temporal dual-polarized measurement of wideband radio channel at mobile station

This paper describes a measurement system enabling the complete real-time characterization of the wideband radio channel. The system is based on a wideband radio channel sounder and a spherical antenna array, and it aims to describe the three-dimensional (3-D) spatial radio channel seen by the mobile terminal, including polarization. This information is highly valuable in designing antennas for mobile terminals. The spatial properties of the measurement system are analyzed through test measurements in an anechoic chamber. The system has a 40/spl deg/ spatial resolution and a 17 dB cross polarization discrimination. The values are well above those of a small mobile terminal antenna. The dynamic range in the spatial domain is 12 dB. The measurement is very fast, which makes real-time channel acquisition practical at normal mobile speeds.

[1]  A. Molisch,et al.  Unified channel model for mobile radio systems with smart antennas , 1998 .

[2]  Teknillinen Korkeakoulu,et al.  Wideband Patch Antenna Array Techniques for Mobile Communications , 1998 .

[3]  H. R. Anderson,et al.  A comparative study of ray tracing and FDTD for indoor propagation modeling , 1998, VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151).

[4]  Gert Frølund Pedersen,et al.  Aalborg Universitet Computation of Main Effective Gain from 3 D Measurements , 2004 .

[5]  Sven-Gustav Häggman,et al.  Wideband radio channel measurement system at 2 GHz , 1999, IEEE Trans. Instrum. Meas..

[6]  J. R. Edmundson,et al.  The distribution of point charges on the surface of a sphere , 1992 .

[7]  L. Vaskelainen.  Iterative least-squares synthesis methods for conformal array antennas with optimized polarization and frequency properties , 1997 .

[8]  Klaus I. Pedersen,et al.  Spatial channel characteristics in outdoor environments and their impact on BS antenna system performance , 1998, VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151).

[9]  T. Taga,et al.  Analysis for mean effective gain of mobile antennas in land mobile radio environments , 1990 .

[10]  E. Bonek,et al.  High-resolution 3-D direction-of-arrival determination for urban mobile radio , 1997 .

[11]  Pertti Vainikainen,et al.  Dynamic wideband measurement of mobile radio channel with adaptive antennas , 1998, VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151).

[12]  Gerd Sommerkorn,et al.  Radio Channel Measurement for Realistic Simulation of Adaptive Antenna Arrays , 1997 .

[13]  Gerd Sommerkorn,et al.  Identification of time-variant directional mobile radio channels , 1999, IMTC 1999.