Performance of two-branch polarisation antenna diversity in an operational GSM network

Abstract

Measurements conducted in an operational GSM network antennas require considerable spacing to achieve dehave been used to evaluate the performance of two-branch polarisation diversity in terms of Branch Power Ratio and cross power envelope correlation of the branch signals [7].Correlation Coefficient. In an urban environment slanted (~k4.5") and V/H polarisation diversity have been compared to conventional space diversity. Similarly, in a rural environment slanted has been compared to space. The results indicate that the correlation and power in-balance between polarisation diversity branches are practically insignificant when the total effect of environment and mobile phone users is taken into account. Therefore, polarisation diversity performs at least as well as space diversity in both urban and rural environments. In the urban environment slanted and V/H diversity configurations can be used interchangeably, but the slanted configuration may be preferred due to practical considerations.

Statistical Modeling of Dual-Polarized MIMO Land Mobile Satellite Channels

“…The power imbalance between the co-and cross-polar components in the cases of 0 o /90 o and ±45 o polarization diversity configurations was investigated in detail in [15] and [16] in the context of fixed wireless and mobile radio channels, respectively, through experimental results and, in particular, through the Branch Power Ratio defined (in dB) as = 10 log 10…”

The COST 259 Directional Channel Model-Part II: Macrocells

“…(2). However, there is a dearth of information in the literature regarding the characteristics of this matrix, since published measurements have usually [50], [51], [52], and that the channel polarization matrix can be characterized by the average relative powers of its components. The ratio between cross-polarized (off-diagonal) and co-polarized (on-diagonal) power is reported to be in the range 4-8 dB in urban environments and 9-15 dB in suburban [40], [46], [49], [50], [51], [53].…”

Dual-polarized wireless communications: from propagation models to system performance evaluation

“…Other experiments have dealt with handheld terminals [17] and have yielded XPR values as low as 2 dB, with mean correlation levels below 0.1 for a VH reception scheme, and around 0.15 for a slant reception scheme. The low measured XPR is explained in the paper by interaction between the antenna and the human head.…”