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Rate Efficient Wireless Image Transmission Using MIMO-OFDM
White Papers This paper proposes a rate efficient JPEG 2000 image transmission system over hybrid wireless networks using MIMO-OFDM. In the proposed system, MIMO-OFDM is used to increase the channel capacity and mitigate the inter-symbol interference, variable...
[March 30, 2005, 3:00]
Magic Squares Transmission Scheme For MIMO OFDM Systems Under Fast Fading Channel
White Papers This paper presents high data rate transmission scheme for Multiple Input Multiple Output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM) systems under fast fading channel in wireless communication.
[October 8, 2008, 1:21]
Point-to-Point Transmission Over MIMO Channels With Intersymbol Interference: Comparison Of Single- And Multicarrier Modulation
White Papers In MIMO orthogonal frequency division multiplexing, temporal equalization is performed by applying OFDM, which decomposes the MIMO ISI channel into a set of independent flat fading MIMO channels. Conversely, in MIMO decision-feedback equalization...
[March 30, 2005, 3:00]
New Technologies In 802.11n review
Reviews MIMO-OFDM is viewed by many as the single most significant development of 802.11n.a/g networks do not work well in multipath environments: having multiple (and slightly different in phase or timing due to the environment) copies of the same...
[June 24, 2008, 9:51]
Broadband MIMO-OFDM Wireless Communications
White Papers OFDM may be combined with antenna arrays at the transmitter and receiver to increase the diversity gain and/or to enhance the system capacity on time-variant and frequency-selective channels, resulting in a multiple-input multiple-output (MIMO...
[November 2, 2004, 2:00]
Performance Of Joint Detection Techniques For Coded MIMO-OFDM And MIMO-MC-CDM
White Papers In the case of MIMO-OFDM crosstalk only occurs because of the use of multiple transmit antennas, whereas MIMO-MC-CDM systems are additionally affected by interference among subcarriers. This paper considers a coded transmission over a time...
[November 2, 2004, 2:00]
Comparison Of Vector Detection Algorithms For MIMO-OFDM
White Papers The aim of this paper is to compare detection algorithms for MIMO-OFDM transmissions by simulation. Moreover, iterative equalization techniques based on soft interference cancellation connected with decoding via the well-known turbo principle can...
[April 11, 2007, 1:01]
On The Exploitation Of Multiple Access Points In A Wireless Single-Frequency-Network Using TDD-OFDM-MIMO Techniques
White Papers This paper proposes a new MIMO data transmission scheme, which combines Single-Frequency-Network (SFN) with TDD-OFDM-MIMO applied for wireless LAN networks. This paper advocates using SFN for Multiple Access Points (MAP) MIMO data transmission.
[April 18, 2007, 1:00]
Channel Capacity Of TDD-OFDM-MIMO For Multiple Access Points In A Wireless Single-Frequency-Network
White Papers This paper proposes a new MIMO data transmission scheme, which combines Single-Frequency-Network (SFN) with TDD-OFDM-MIMO applied for wireless LAN networks. This proposal advocates using SFN for Multiple Access Points (MAP) MIMO data transmission.
[April 18, 2007, 1:00]
Performance Analysis And Design Optimization Of LDPC-Coded MIMO OFDM Systems
White Papers This paper considers the performance analysis and design optimization of Low-Density Parity Check (LDPC) coded Multiple-Input Multiple-Output (MIMO) Orthogonal Frequency-Division Multiplexing (OFDM) systems for high data rate wireless transmission.
[April 26, 2007, 1:00]
Spatial Multiplexing And Diversity Gain In OFDM-Based MIMO Systems
White Papers This paper investigates trade offs between different techniques in broadband OFDM-based MIMO systems for achieving full diversity or maximum spatial multiplexing gain. The basic model of OFDM-based spatial multiplexer is very suitable for high data...
[October 21, 2004, 5:45]
Comparison Of Iterative Detection Schemes For MIMO Systems With Spreading Based On OFDM
White Papers This paper considers a coded transmission over a time-invariant MIMO channel, where channel state information is present at the receiver but not at the transmitter. As basic modulation technique OFDM is applied.
[August 10, 2008, 1:16]
On The Capacity Of Noncoherent Wideband MIMO-OFDM Systems
White Papers In this paper the capacity behavior of full-band MIMO-OFDM systems in the absence of channel state information both at the transmitter and the receiver is studied. Based on capacity lower and upper bounds, the transmission rate penalty due to...
[August 9, 2008, 1:16]
Siemens Claims Gigabit Wireless Breakthrough
News The demonstration at its Munich laboratories on Tuesday reached speeds of 1Gbps, twenty times faster than 802.11g, thanks to a combination of new OFDM techniques and multi-in, multi-out (MIMO) antenna technology.
[December 9, 2004, 17:00]
Multiuser Detection And Channel Estimation In MIMO OFDM Systems Via Blind Source Separation
White Papers This paper proposes a blind multiuser detection and channel estimation method for Multiple-Input Multiple-Output (MIMO) Orthogonal Frequency-Division Multiplexing (OFDM) systems based on Blind Source Separation (BSS).
[April 18, 2007, 1:00]
Effect Of Spreading In An Outdoor MIMO-OFDM System
White Papers This paper considers transmission over an outdoor broadband MIMO channel where channel state information is present at the receiver but not at the transmitter. Among several MC variants, OFDM represents a well-known technique and is used in...
[August 9, 2008, 1:16]
Space-Frequency Coded MIMO-OFDM With Variable Multiplexing-Diversity Tradeoff
White Papers Space-frequency coded Orthogonal Frequency Division Multiplexing (OFDM) is capable of realizing both spatial and frequency-diversity gains in multipath multiple-input multiple-output (MIMO) fading channels.
[October 26, 2004, 3:00]
Per-Antenna-Coded Schemes For MIMO OFDM
White Papers Two Per-Antenna-Coding (PAC) receiver schemes for Multiple-Input Multiple-Output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM) are described and compared in this paper. In MIMO, the data to transmit are multiplexed onto different antennas.
[November 2, 2004, 2:00]
Spatial Multiplexing For Outdoor MIMO-OFDM Systems With Limited Feedback Constraint
White Papers This paper proposes a spatial multiplexing technique for the downlink of a Multiple-Input-Multiple-Output (MIMO) Orthogonal-Frequency-Division-Multiplexing (OFDM) system. Adaptive transmission is adopted on each stream to set a fixed probability of...
[April 11, 2007, 1:01]
MIMO-OFDM
White Papers OFDM is modulation method known for its capability to mitigate multipath. In OFDM the high speed data stream is divided into Nc narrowband data streams, Nc corresponding to the subcarriers or subchannels i.e.one OFDM symbol consists of N symbols...
[April 11, 2007, 1:01]
