mimo
RSS mimoPhysical Layer Implementation and Evaluation of Multiple Input Multiple Output - Orthogonal Frequency Division Multiplexing (MIMO-OFDM) System
White Paper This paper introduces a physical layer implementation and some test results for the multiple input multiple output - orthogonal frequency division multiplexing (MIMO-OFDM) fast prototype system for the fourth generation mobile communication. [03 Jul 2008]
Blind Carrier Offset Estimation for MIMO OFDM Systems: Cramer Rao Bound and Nonlear Least Squares
White Paper This paper presents the nonlinear least squares (NLS) estimator which exploits Multi Input Multi Output (MIMO) diversity for carrier frequency synchronization. Orthogonal Frequency Division Multiplexing (OFDM) communications transform frequency... [03 Jul 2008]
Optimal Training Sequences for Channel Estimation in MIMO OFDM Systems in Mobile Wireless Channels
White Paper This paper describes a channel estimation and tracking scheme for MIMO OFDM systems based on pilot tones. The mean square error of the proposed scheme is derived, and through this optimal training sequences and placement of the pilot tones is derived. [03 Jul 2008]
Synchronization for MIMO OFDM Systems
White Paper This paper proposes a time and frequency synchronization technique for a Q transmit and L receive (Q X L) MIMO OFDM system. The synchronization is achieved using training symbols which are simultaneously transmitted from Q transmit antennas. [03 Jul 2008]
High Data Rate MIMO-OFDM System With Orthogonal Delay Diversity Realization
White Paper The delayed orthogonality with respect to frequency tones among different transmitter antennas guarantees to exploit the full spatial and frequency diversity of the frequency-selective multi-input multi-output (MIMO) channel. [03 Jul 2008]
Receiver Implementation for a MIMO OFDM System
White Paper This paper presents preamble and receiver design for a Q transmit L receive multi input multi output OFDM system. Tasks performed by the receiver are synchronization in time and frequency domains, followed by channel estimation and noise variance... [03 Jul 2008]
Antenna Selection for Multiple-Input Multiple-Output Orthogonal Frequency Division Multiplexing Systems
White Paper The capacity of a wireless communication system can be increased by the use of multiple-input multiple-output (MIMO) systems. MIMO systems can also be used to increase the diversity order by employing space-time coding. [03 Jul 2008]
Channel Estimation for OFDM Systems With Multiple Transmit Antennas by Exploiting the Properties of the Discrete Fourier Transform
White Paper This paper addresses channel estimation based on the discrete Fourier transform (DFT) applied to OFDM-based MIMO systems. By exploiting the properties of the DFT, channel estimation schemes for MIMO-OFDM system can be simplified. [03 Jul 2008]
An Adaptive/Reconfigurable Space-Time Coded OFDM Modem for Broadband Fixed Wireless Access: The STINGRAY Project
White Paper In this paper the main features of the STINGRAY modem are illustrated, with particular emphasis on the innovative adaptive Space-Time (ST) coding schemes that have been explicitly designed for Multiple-Input Multiple-Output (MIMO) OFDM channels. [03 Jul 2008]
MIMO Capacity Through Correlated Channels in the Presence of Correlated Interferers and Noise: A (Not So) Large N Analysis
White Paper The use of multiple-antenna arrays in both transmission and reception promises huge increases in the throughput of wireless communication systems. It is therefore important to analyze the capacities of such systems in realistic situations, which... [03 Jul 2008]
I/Q Mismatch Cancellation for MIMO-OFDM Systems
White Paper MIMO-OFDM systems are gaining prominence in high data rate applications due to their increased spectral efficiency. In MIMO-OFDM systems, I/Q mismatch causes interference between the frequency mirror subcarriers. [03 Jul 2008]
Frequency-Domain Interference Cancellation for MIMO-OFDM Systems
White Paper This paper proposes a new interference cancellation scheme for multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) systems in the presence of intersymbol interference (ISI). [03 Jul 2008]
Optimal Training Design for MIMO OFDM Systems in Mobile Wireless Channels
White Paper This paper describes a least squares (LS) channel estimation scheme for multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems based on pilot tones. The mean square error (MSE) of the LS channel estimate is... [03 Jul 2008]
Performance of MIMO Antenna Selection for Space-Time Coded OFDM Systems
White Paper This paper studies antenna selection for space-time coded orthogonal frequency division multiplexing (OFDM) systems that employ multiple transmit and receive antennas. It is assumed that the channel state information (CSI) is exactly known at the... [03 Jul 2008]
Multi-User Transmissions for OFDM: Channel Estimation and Performances
White Paper To increase the throughput of transmission systems, MIMO transmission have become a natural path. Two different MIMO schemes can be envisioned: point to point communications and multi-point to point communications. [03 Jul 2008]
