multiple systems fading
Implementation of a MIMO OFDM-Based Wireless LAN System
White Paper The combination of multiple-input multiple-output (MIMO) signal processing with orthogonal frequency division multiplexing (OFDM) is regarded as a promising solution for enhancing the data rates of next-generation wireless communication systems... [10 Apr 2008]
Implementation of a MIMO OFDM Based Wireless LAN System
White Paper The combination of Multiple-Input Multiple-Output (MIMO) signal processing with Orthogonal Frequency Division Multiplexing (OFDM) is regarded as a promising solution for enhancing the data rates of next generation wireless communication systems... [10 Apr 2008]
Carrier Seperated OFDM Systems for Multiaccess Wireless Communications
White Paper OFDM is considered to support high data rates and carrier separation is introduced to combat multipath fading. While promising robustness against multipath fading, the computational complexity of a carrier separated OFDM system can be made to be as... [10 Apr 2008]
Performance of MIMO OFDM Systems in Fading Channels With Additive TX and RX Impairments
White Paper To gain a better understanding of the influence of these impairments on the performance of multiple antenna OFDM systems, this paper studies a zero-forcing based MIMO OFDM system with imperfections modeled as additive error sources in both... [10 Apr 2008]
Effect of Slow Fading and Adaptive Modulation on TCP/UDP Performance of High-Speed Packet Wireless Networks
White Paper High speed data wireless networks in multipath environments suffer channel impairment from many sources such as thermal noise, path loss, shadowing, and fading. In particular, short-term fading caused by mobility imposes irreducible error floor... [05 Dec 2007]
Improving Wireless LAN Performance Via Adaptive Local Error Control
White Paper Wireless links can exhibit high error rates due to attenuation, fading, or interfering active radiation sources. A significant challenge is ensuring that systems with multiple layers of error control avoid compromising performance by duplication of... [05 Dec 2007]
Rapid MIMO-OFDM Software Defined Radio System Prototyping
White Paper MIMO communication, enabled by the use of multiple transmit and multiple receive antennas, is known for its high spectral efficiency as well as its robustness against fading and interference. Multiple Input-Multiple Output (MIMO) is an attractive... [31 Aug 2007]
Rapid MIMO-OFDM Software Defined Radio System Prototyping
White Paper MIMO communication, enabled by the use of multiple transmit and multiple receive antennas, is known for its high spectral efficiency as well as its robustness against fading and interference. Multiple Input-Multiple Output (MIMO) is an attractive... [10 Aug 2007]
Allocating Resources to Multiple Antenna Mobile Nodes in Fading Wireless Ad-Hoc Networks With Temporally Correlated Loss
White Paper Multiple antenna systems utilizing space-time block codes are gaining increasing popularity as the result of being adopted by different wireless standards. Relying on adaptive modulation techniques for multiple antenna systems, this paper examines... [01 Aug 2007]
Multi-Code Multicarrier CDMA: Performance Analysis
White Paper A novel multi-code multicarrier code division multiple access (MC-MC-CDMA) system is proposed and analyzed in a frequency selective fading channel. The bit error rate of the system is analytically derived in frequency selective fading, with... [04 Jul 2007]
On the Influence of Phase Noise Induced ICI in MIMO OFDM Systems
White Paper It is shown that in the case of frequency flat Rayleigh fading, the influence of receiver and transmitter PN is equal. In the case of independent Rayleigh fading, however, the impact of the receiver PN is shown to depend on the ratio between the... [18 Apr 2007]
Carrier Separated OFDM Systems for Multiaccess Wireless Communications
White Paper OFDM is considered to support high data rates and carrier separation is introduced to combat multipath fading. While promising robustness against multipath fading, the computational complexity of a carrier separated OFDM system can be made to be as... [18 Apr 2007]
A Multirate Pilot-Symbol-Assisted Channel Estimator for OFDM Transmitter Diversity Systems
White Paper Orthogonal Frequency Division Multiplexing (OFDM) transmitter diversity techniques have been shown to be efficient means of achieving near optimal diversity gain in frequency-selective fading channels. [14 Apr 2007]
Asymptotic Performance of Transmit Diversity Via OFDM for Multipath Channels
White Paper The major drawback is that this system only works when a "Flat-fading" model for the channel is assumed; when used in a multipath environment, the system breaks down. Here it shows that when the Alamouti code is placed within an OFDM structure... [13 Apr 2007]
Optimal Space-Frequency Group Codes for MIMO-OFDM System
White Paper A rather general channel model is assumed, where the channel is frequency-selective Rayleigh fading with arbitrary power-delay profile. Space-Frequency (SF) group codes are designed for Multiple-Input Multiple-Output Orthogonal Frequency Division... [13 Apr 2007]
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