scholarly journals Frequency Synchronization for Multiuser MIMO-OFDM System Using Bayesian Approach

2010 ◽  
Author(s):  
Jianwen Chen ◽  
Jianwu Chen ◽  
Yik-Chung Wu
Keyword(s):  
Bayesian Approach ◽  
Frequency Synchronization ◽  
Ofdm System ◽  
Multiuser Mimo ◽  
Mimo Ofdm

scholarly journals Uplink Multiuser MIMO-OFDM System in the Presence of Phase Noises, Power Imbalance, and Correlation

2018 ◽  
Vol 2018 ◽  
pp. 1-8
Author(s):  
Xiaoming Chen ◽  
Andreas Wolfgang ◽  
Tommy Svensson
Keyword(s):  
Orthogonal Frequency Division Multiplexing ◽  
Mimo Systems ◽  
Multiple Input Multiple Output ◽  
Base Station ◽  
Closed Form Expression ◽  
Ofdm System ◽  
Multiuser Mimo ◽  
Single Antenna ◽  
Input Multiple Output ◽  
Mimo Ofdm

The effects of phase noises (PNs), power imbalances, and correlations on multiuser orthogonal frequency division multiplexing (OFDM) multiple-input multiple-output (MIMO) systems are studied. It is assumed that each user is equipped with a single antenna, whereas the base station (BS) has multiple antennas and use zero-forcing (ZF) decoder for multiuser detection. Since each user has an independent oscillator, the received uplink (UL) signal at each BS antenna is corrupted by all of these independent PNs. Furthermore, there may be power imbalances and correlations (due to common scatterers) between different users. These impairments are jointly analyzed in this work. A closed-form expression of the mean square error (MSE) performance of the multiuser MIMO-OFDM system is derived. The analytical results are verified by simulations.

Precoding Scheme Robust to Imperfect CSI in Downlink Multiuser MIMO-OFDM System

2011 ◽  
Vol E94-B (12) ◽  
pp. 3515-3524 ◽  
Author(s):  
Linchen CHANG ◽  
Kazuhiko FUKAWA ◽  
Hiroshi SUZUKI ◽  
Satoshi SUYAMA
Keyword(s):  
Imperfect Csi ◽  
Ofdm System ◽  
Multiuser Mimo ◽  
Mimo Ofdm ◽  
Downlink Multiuser Mimo
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