Polarization characteristics of multiple-input multiple-output channels

Jiang, Lei; Thiele, Lars; Brylka, A.; Jaeckel, Stephan; Jungnickel, Volker

doi:10.1109/pimrc.2008.4699800

Cited by 4 publications

(5 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is verified that the MIMO capacity is determined by the SNR and the eigenvalue ratio as shown in Equation (7). However, it is obvious that DP displays a few fluctuations of the eigenvalue ratio relative to the NRSSI changes as shown in Fig.6.…”

Section: Measurement Resultsmentioning

confidence: 79%

“…However, it has been reported that the XPDs of the V and H polarization in NLOS are highly dependent on the specific propagation environment between the transmitter and receiver because the polarization dependency of the signals is weakened due to multiple reflections, diffractions and scattering [7], while the XPD increases in a LOS environment. Then, we introduce the normalized RSSI which represents the difference from the RSSI when free space propagation is assumed.…”

Section: Measurement Resultsmentioning

confidence: 99%

“…MIMO propagation characteristics have been thoroughly analyzed in a series of studies under outdoor conditions for dual-polarized antennas [2][3][4][5][6][7]. One study validated the stochastic MIMO channel considering polarization diversity and unbalanced branch power ratio by comparing Monte-Carlo simulations and experimental results of the 4x4 MIMO [2].…”

Section: Introductionmentioning

confidence: 99%

“…An experimental study [6] focused on the characteristics of the channel capacity based on the number of antennas and the difference in antenna configurations in terms of polarization, i.e., vertical and horizontal, and slanted 45 deg., at both the base and the terminal stations for an 8x2 MIMO channel. Study [7] showed that the difference between the XPDs of the vertically and horizontally polarized transmission depends strongly on the specific propagation environment between the transmitter and the receiver in non-line-of-sight (NLOS) conditions. These studies clarified the propagation characteristics required to specify a MIMO channel or its capacity.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

MIMO capacity estimation based on single and dual-polarization MIMO channel measurements

Nanba

Miyazaki

Hirota

et al. 2010

2010 16th Asia-Pacific Conference on Communications (APCC)

View full text Add to dashboard Cite

Multiple-Input Multiple-Output (MIMO) wireless system is one of the most promising technologies for providing a large transmission capacity without expanding the frequency band in cellular mobile systems. This paper focuses on 2x2 MIMO capacity estimation through propagation measurements at 2GHz band. The authors conducted the measurement campaign in two regions in Fujimino (Saitama prefecture) and Yokohama (Kanagawa prefecture) Japan. The former is a typical residential area and the latter is an urban area. The paper compares MIMO spatial multiplexing efficiency in terms of the eigenvalue ratio between the single and orthogonal dualpolarization antenna configurations. The eigenvalue ratio is characterized by two parameters. One is cross-polarization discrimination (XPD) and the other is the normalized received signal strength indicator (RSSI), which represents the difference from the RSSI when free space propagation is assumed. It is verified that the MIMO capacity of the dual-polarization can be estimated from just the SNR because the dependency of the eigenvalue ratio on the propagation environment is small. In contrast, that of the single-polarization needs to consider both the eigenvalue ratio and the SNR because the eigenvalue ratios change significantly due to the propagation environment.

show abstract

Section: Measurement Resultsmentioning

confidence: 79%

Section: Measurement Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

MIMO capacity estimation based on single and dual-polarization MIMO channel measurements

Nanba

Miyazaki

Hirota

et al. 2010

2010 16th Asia-Pacific Conference on Communications (APCC)

View full text Add to dashboard Cite

show abstract

“…One is a cylinder with 8 cross-polarized patch antennas on the surface arranged in a row. The other is a cylindrical antenna made of two 12-patch elements arranged in two rows, on top a cube antenna is mounted as shown in [13].…”

Section: Measurement Setupmentioning

confidence: 99%

Polarization rotation evaluation for macrocell MIMO channel

Jiang

Thiele

Jungnickel

2009

2009 6th International Symposium on Wireless Communication Systems

Self Cite

View full text Add to dashboard Cite

Abstract-In this paper, the impact of the polarization on the performance of the multiple-input multiple-output (MIMO) channel with cross-polarized antennas has been investigated based on the outdoor macrocell measurement at 2.53 GHz. A simple model which can capture the major characteristics of the cross polarized channel is proposed. The effective polarization rotation during the propagation is evaluated using the proposed model, and found to follow a bimodal Rayleigh distribution. The commonly accepted uniform distribution polarization rotation angle is a reasonable but coarse assumption compared with our estimated results. The vertical and horizontal polarization perform similarly in line-of-sight (LOS) scenario, but may be different in non-LOS (NLOS) scenario depending on the environment where the receiver is located. The polarization diversity outperforms the spatial diversity in LOS scenario, but shows relatively small gain in a rich scattering scenario. This is further proofed by the comparison of the capacity of a 4 × 4 MIMO channel with cross-polarized antennas.

show abstract