Construction and Capacity Analysis of High-Rank LoS MIMO Channels in High Speed Railway Scenarios

The validity of the maximum capacity criterion applied to realize high-rank line-of-sight (LoS) multiple-input multiple-output (MIMO) channels is investigated for high speed railway scenarios. Performance is evaluated by ergodic capacity. Numerical results demonstrate that by simply adjusting antenna spacing according to the maximum capacity criterion, significant capacity gains are achievable. We find relatively low sensitivity of the system to displacements from the optimal point and angle in relatively short range. Thus, we present two proposals to reconfigure antenna arrays so as to maximize LoS MIMO capacity in the high speed railway scenarios

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Construction and Capacity Analysis of High-Rank LoS MIMO Channels in High Speed Railway Scenarios

2012 8th International Conference on Wireless Communications, Networking and Mobile Computing ◽

10.1109/wicom.2012.6478462 ◽

2012 ◽

Cited By ~ 4

Author(s):

Jingya Yang ◽

Bo Ai

Keyword(s):

High Speed ◽

High Rank ◽

Capacity Analysis ◽

Mimo Channels ◽

High Speed Railway

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On the Capacity of MIMO Channels with Outdated Channel State Information

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.204-210.2053 ◽

2011 ◽

Vol 204-210 ◽

pp. 2053-2056

Author(s):

Ying Li ◽

Yi Jun Zhu ◽

Lan Ma ◽

Yao Zhu

Keyword(s):

Fading Channels ◽

Channel State Information ◽

Multiple Input Multiple Output ◽

Ergodic Capacity ◽

Mimo Channel ◽

Wide Sense ◽

Mimo Channels ◽

Channel State ◽

State Information ◽

Input Multiple Output

A Multiple-input multiple-output (MIMO) time-varying flat fading channel is considered. The transmitter obtained the channel state information (CSI) relying on the reciprocity principle or by the feedback from the receiver. Thus, channel state information at the transmitter (CSIT) is outdated due to the delay between the estimation of the channel and the transmission of the data. In order to achieve the maximum channel capacity, the transmitter linearly precoded the signal before transmission based on the outdated CSIT. Under the assumptions of wide-sense stationary uncorrelated scattering Rayleigh fading channels and Jake’s model, the instantaneous mutual information and ergodic capacity is derived for MIMO channels with outdated CSIT. The information outage probability of MIMO channel with outdated CSIT is also presented.

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A Semiempirical MIMO Channel Model in Obstructed Viaduct Scenarios on High-Speed Railway

International Journal of Antennas and Propagation ◽

10.1155/2014/287159 ◽

2014 ◽

Vol 2014 ◽

pp. 1-10 ◽

Cited By ~ 12

Author(s):

Tao Zhou ◽

Cheng Tao ◽

Liu Liu ◽

Zhenhui Tan

Keyword(s):

High Speed ◽

Channel Model ◽

Mimo Systems ◽

Multiple Input Multiple Output ◽

Time Correlation ◽

Time Correlation Function ◽

Mimo Channel ◽

High Speed Railway ◽

Single Input Single Output ◽

Single Output

A semiempirical multiple-input multiple-output (MIMO) channel model is proposed for high-speed railway (HSR) viaduct scenarios. The proposed MIMO model is based on the combination of realistic single-input single-output (SISO) channel measurement results and a theoretical geometry-based stochastic model (GBSM). Temporal fading characteristics involvingK-factor and Doppler power spectral density (PSD) are derived from the wideband measurement under an obstructed viaduct on Zhengzhou-Xi’an HSR in China. The GBSM composed of a one-ring model and an elliptical model is employed to describe the entire propagation environment. Environment-related parameters in the GBSM are determined by the measured temporal fading properties. And a close agreement is achieved between the model results and measured data. Finally, a deterministic simulation model is established to perform the analysis of the space-time correlation function, the space-Doppler PSD, and the channel capacity for the measured scenario. This model is more realistic and particularly beneficial for the performance evaluation of MIMO systems in HSR environments.

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Channel Characteristics of High-Speed Railway Station Based on Ray-Tracing Simulation at 5G mmWave Band

International Journal of Antennas and Propagation ◽

10.1155/2019/3137583 ◽

2019 ◽

Vol 2019 ◽

pp. 1-10

Author(s):

Lei Xiong ◽

Haiyang Miao ◽

Bo Ai ◽

Tutun Juhana ◽

Adit Kurniawan

Keyword(s):

Ray Tracing ◽

Antenna Arrays ◽

High Speed ◽

Wireless Channel ◽

Delay Spread ◽

Shadow Fading ◽

Railway Station ◽

High Speed Railway ◽

Channel Characteristics ◽

Ray Tracing Simulation

In order to satisfy the increasing demand for the higher transmission capacity of “smart station”, millimeter wave (mmWave) technology is expected to play a significant role in the high data rate communication system. Based on the ray-tracing simulation technology, this paper would study wireless channel characteristics of the three-dimensional (3D) model of high-speed railway station at the mmWave band. Key parameters such as path loss exponent, shadow fading factor, delay spread, Rician K-factor, angular spread, power angle spectrum, and spatial correlation are extracted and investigated. These channel characteristics are of value for the selection of antenna arrays and even the design of future 5G communication networks in the railway environment.

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