Theoretical and experimental analysis of the channel capacity enhancement based on MIMO techniques in subway tunnels
نویسندگان
چکیده
Both a theoretical approach and measurements of channel characteristics have been carried out to determine the maximum capacity which can be expected when MIMO techniques are implemented in tunnels, and especially in subway tunnels. The influence of the position of the antennas inside the transmitting and the receiving arrays on the correlation between paths and on the singular values of the transfer matrix is emphasized. The channel capacity is given for various geometrical configurations and compared with the case of i.i.d. Rayleigh channels.
منابع مشابه
Propagation in Subway Tunnels: SISO and MIMO Channel Characterization
This paper first describes experimental results on the characterization of the propagation in subway tunnels. A first set of experiments have been carried out in Paris subway to determine the path loss, the long term and short term fading and the masking effect produced by a train. Then a wide band analysis has been performed both for a SISO (Single Input Single Output) and for a MIMO (Multiple...
متن کاملEffect of Surface Blasting on Subway Tunnels- A Parametric Study
During wars and crises, the underground tunnels are used as a safe space. Therefore, the stability and safety of them under a blast is of particular importance. In this paper, the Finite Difference Method has been used to study the influence of the change in geotechnical parameters and depth on surface blasting on subway tunnels. Results showed that increasing the internal friction angle, modul...
متن کاملمدلسازی دو بعدی کانالهای چند ورودی– چند خروجی با آرایههای قطبیشده
In this paper, required parameters for the spatial MIMO channel modeling are studied, and necessary steps for realization of the channel based on two different scenarios, called; “ un-polarized and cross-polarized antenna”, are introduced. We also consider the effect of cross correlations between important parameters like delay spread, shadow fading and angle spread in our study. Th...
متن کاملModeling and Understanding MIMO Propagation in Tunnels
This paper first presents an application of the modal theory for interpreting experimental results of the electromagnetic field variation along a tunnel. The transmitting frequency is assumed to be high enough so that the tunnel behaves as an oversized waveguide. Then, for a Multiple-Input Multiple-Output channel, theoretical results of the channel capacity are given. To explain the decrease of...
متن کاملبررسی تأثیر فاصلهی بین آنتنها در فرستنده و گیرنده بر روی ظرفیت کانال MIMO
In this paper, the spatial MIMO channel modeling (SCM) is introduced and the required parameters for this modeling are studied. Then, the MIMO channel gains and capacity are analyzed. The transmitter and receiver antenna patterns are also analyzed. Next, we are focused on the effects of the transmitter and receiver antenna arrays separations, the arrays length, and the angles spread on the ante...
متن کامل