Comparison of MIMO antenna configurations in picocell and microcell environments

Abstract

This paper presents the results achieved with a dualpolarized multiple-input multiple-output (MIMO) measurement system in the 2 GHz range. Results from continuous measurement routes were used in evaluating and comparing different MIMO antenna configurations. Different pattern and polarization diversity possibilities were studied using two methods: elements were selected from the antenna arrays used in measurements, and as another option, in the mobile station the incident waves were estimated and used in different dipole antenna arrays. The capacity limit seems to be higher in an indoor picocell than in an outdoor microcell environment. At the mobile station, directive elements result in 35% higher average capacities than those of the omnidirectional elements; however, the capacity of the directive elements also depends on the azimuth direction of arrival of the incident field. Dual-polarized antenna configurations have approximately 14% higher capacities than copolarized configurations. Increasing the number of mobile antenna elements increases the capacity in those environments where the angular spread of the incident field is large. Increasing the distance between elements at the fixed station increases the capacity-especially in microcells where signals arrive from specific directions.

Latest Progress in MIMO Antennas Design

“…Another measurement results in micro-and pico-cell show the channel capacity of MIMO systems with dual-polarized antenna elements are 14% higher than that with twicenumbered single-polarized antennas (Sulonen et al, 2003). Similar results are also obtained (Erceg et al, 2006).…”

Design and Measurement-Based Evaluation of Multi-Antenna Mobile Terminals for Lte 3500 MHZ Band

“…On the base station side, link capacity can be improved by employing multiple antennas without space restrictions [6]. In contrast, compact terminal antennas are strictly limited in size.…”

Impact of Vehicular Array Position on Urban MIMO Channel Characteristics

“…Studies of vehicular-based MIMO channels were reported in [9][10][11][12][13][14][15][16][17], where the MIMO channels were measured using systems with one fixed endpoint and one vehicular-based endpoint. Lower mobility outdoor measurement campaigns have been performed using a mobile transmitter or receiver mounted on a trolley, pushed at walking speed, for example, [18][19][20]. The fixed wireless outdoor International Journal of Antennas and Propagation MIMO channel has also been investigated in urban environments, see, for example, [21][22][23][24][25].…”