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 c haracterization of the wideband radio channel, The system is based on a wid eband radio channel sounder and a spherical antenna array, and it aims to d escribe the three-dimensional (3-D) spatial radio channel seen by the mobil e terminal, including polarization. This information is highly valuable in designing antennas for mobile terminals. The spatial properties of the meas urement system are analyzed through test measurements in an anechoic chambe r, The system has a 40 degrees spatial resolution and a 17 dB cross polariz ation discrimination. The values are well above those of a small mobile ter minal antenna. The dynamic range in the spatial domain is 12 dB. The measur ement Is very fast, which makes real-time channel acquisition practical at normal mobile speeds.