UWB propagation measurements by PN-sequence channel sounding

Abstract

modulated by a train of pulses, each having a duration of 0.4 ns, shaped by a pseudo noise (PN) sequence, covering the band 3.6-6 GHz. The transmitter is moved in six different positions on the floor, while the receiver is moved within each room by a digitally controlled positioner in 625 different locations arranged in a square grid of 25 × 25 points with 2 cm spacing. A total of 625 × 16 profiles in non-line-of-sight (NLOS) and 625 in line-of-sight (LOS) conditions are recorded within the rooms. LOS measurements are made in the corridor in 11 locations at incremental spacing of 1 m. We describe the measurement technique as well as the procedure by which we process the experimental data to extract the amplitude, phase and delay associated to each path of the channel impulse responses. Finally, we derive LOS and NLOS path-loss models

Time dispersion characterization for UWB mobile radio channels between 3.1 and 10.6 GHz

“…The second cluster, with a slight decreasing trend, is made by scatterers far from the antennas. A linear fitting is proposed to model the decreasing trend of the envelope of the PDP in agreement with other studies in different frequency bands [2,5,8,9].…”

“…This procedure has been used in several previous research studies [2][3][4][5]. Considering the indoor radio channel and the transmitter/receiver antennas as a quadripole, the S 21 parameter measured by the network analyzer is proportional to the time-variant transfer function, 0 ( , ) T f t [6,7].…”

“…In this paper, a time dispersion study is presented in the band from 3.1 to 10.6 GHz. An extensive measurement campaign was performed, covering the commercial UWB spectrum, while other studies in this band don't cover the entire bandwidth [2,4]. The measurement campaign was carried out in a typical indoor office scenario, at iTEAM Research Institute facilities, at the Polytechnic University of Valencia.…”

“…UWB uses a very wide frequency range, which allows ultra high data rates at short distances [1][2][3].…”

UWB propagation measurement using spread spectrum channel sounding

“…Characterizing the wideband propagation channel is important for radio system design and performance analysis in general, and characterization of UWB channels in particular is a topic of current interest [1]. In general there are two possible methods for wideband channel sounding and propagation measurements: frequency domain [2][3] and time domain [4][5][6]. One method to characterize channels in time domain is using spread spectrum sounders [5][6].…”