scholarly journals Degrees of Freedom of Generic Block-Fading MIMO Channels Without a Priori Channel State Information

2014 ◽  
Vol 60 (12) ◽  
pp. 7760-7781 ◽  
Author(s):  
Gunther Koliander ◽  
Erwin Riegler ◽  
Giuseppe Durisi ◽  
Franz Hlawatsch
Keyword(s):  
Channel State Information ◽  
Degrees Of Freedom ◽  
A Priori ◽  
Mimo Channels ◽  
Channel State ◽  
State Information

On the Capacity of MIMO Channels with Outdated Channel State Information

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 Thus, channel state information at the transmitter (CSIT) is outdated due to the delay between the estimation of the channel and the transmission of the data.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to achieve the maximum channel capacity, the transmitter linearly precoded the signal before transmission based on the outdated CSIT.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channels and Jake’s model, the instantaneous mutual information and ergodic capacity is derived for MIMO channels with outdated CSIT. The information outage probability of MIMO channel with outdated CSIT is also presented.

scholarly journals Power Optimization of Tilted Tomlinson-Harashima Precoder in MIMO Channels with Imperfect Channel State Information

2013 ◽  
Vol 2013 ◽  
pp. 1-6
Author(s):  
Hossein Khaleghi Bizaki ◽  
Morteza Khaleghi Hojaghan ◽  
Seyyed Mohammad Razavizadeh
Keyword(s):  
Channel State Information ◽  
Communication Systems ◽  
Estimation Error ◽  
Multiple Input Multiple Output ◽  
Channel Estimation Error ◽  
Imperfect Channel State Information ◽  
Mimo Channels ◽  
Channel State ◽  
State Information ◽  
Input Multiple Output

This paper concentrates on the designing of a robust Tomlinson-Harashima Precoder (THP) over multiple-input multiple-output (MIMO) channels in wireless communication systems with assumption of imperfect channel state information (CSI) at the transmitter side. With the assumption that the covariance matrix of channel estimation error is available at the transmitter side, we design a THP that presents robustness against channel uncertainties. In the proposed robust THP, the transmit power is further minimized by using the Tilted constellation concept. This power minimization reduces the interchannel Interference (ICI) between subchannels and, furthermore, recovers some part of the THP's power loss. The bit error rate (BER) of the proposed system is further improved by using a power loading technique. Finally, the simulation results compare the performance of our proposed robust THP with a conventional MIMO-THP.

Degrees of Freedom of 2-Tier Networks Without Channel State Information at the Transmitter

2019 ◽  
Vol 26 (2) ◽  
pp. 382-386
Author(s):  
Maximo Morales-Cespedes ◽  
Luc Vandendorpe ◽  
Ana Garcia Armada
Keyword(s):  
Channel State Information ◽  
Degrees Of Freedom ◽  
Channel State ◽  
State Information

Multi-User and Single-User Throughputs for Downlink MIMO Channels with Outdated Channel State Information

2014 ◽  
Vol 3 (3) ◽  
pp. 321-324 ◽  
Author(s):  
Qi Wang ◽  
Larry J. Greenstein ◽  
Leonard J. Cimini ◽  
Douglas S. Chan ◽  
Ahmadreza Hedayat
Keyword(s):  
Channel State Information ◽  
Mimo Channels ◽  
Channel State ◽  
State Information ◽  
Single User ◽  
Outdated Channel State Information

Finite-SNR outage analysis for MIMO channels with imperfect channel state information

2017 ◽  
Vol 22 ◽  
pp. 58-64 ◽  
Author(s):  
Nandita Lavanis ◽  
Devendra Jalihal ◽  
Arun Pachai Kannu ◽  
Srikrishna Bhashyam
Keyword(s):  
Channel State Information ◽  
Imperfect Channel State Information ◽  
Mimo Channels ◽  
Channel State ◽  
State Information ◽  
Outage Analysis
Sign in / Sign up

Export Citation Format

Share Document