Results 171 to 180 of about 15,939 (189)

Antenna Selection for MIMO–OFDM WLAN Systems

International Journal of Wireless Information Networks, 2005
This paper discusses the packet error rate (PER) performance of multiple-input multiple-output (MIMO) wireless systems. We focus our discussion on communication systems based on the IEEE 802.11a/g standard. In particular, we study the performance of spatial multiplexing systems with joint encoding at the transmitter and linear detection at the receiver.
M. Collados, A. Gorokhov
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MIMO OFDM System with Virtual Receive Antennas

VTC Spring 2009 - IEEE 69th Vehicular Technology Conference, 2009
In our earlier work, a novel concept of virtual receive antennas (VRA) was proposed and is a viable solution for single carrier spatial multiplexing system with less number of physical receive antennas. In this paper, we investigate the VRA system in spatially multiplexed orthogonal frequency-division multiplexing (OFDM) system, which is a promising ...
Lan, Yang, So, Daniel K C
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Performance Evaluation of MIMO-OFDM in Tunnels

IEEE Antennas and Wireless Propagation Letters, 2012
It has been previously shown that communications in tunnel environments can be improved by using multiple-input-multiple-output (MIMO) techniques, despite the small angular spread of the rays. However, narrowband transmission was always assumed to fulfill the flat channel hypothesis. The objective of this letter is to generalize these previous works to
Sanchis-Borras, C., Molina-Garcia-Pardo, J.M., Lienard, M., Degauque, Pierre   +3 more
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MIMO-OFDM Visible Light Communications

2017
Visible light communication is emerging as an important new technology for indoor high-speed data transmission. Illumination in most indoor scenarios is provided by multiple luminaires located on the ceiling. When these luminaires are used as data transmitters, they can be configured as an optical multiple-input multiple-output (MIMO) system to achieve
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3D MIMO-OFDM Channel Estimation

IEEE Transactions on Communications, 2012
In this paper bandwidth efficient pilot design for a MIMO-OFDM downlink is addressed. By exploiting the spatial correlation of signals originating from neighboring transmit antennas, the principle of pilot aided channel estimation (PACE) by two-dimensional (2D) interpolation in time and frequency is extended to the spatial domain; giving rise to three ...
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Compare the performance analysis for FFT based MIMO-OFDM with DWT based MIMO-OFDM

2013 IEEE International Conference ON Emerging Trends in Computing, Communication and Nanotechnology (ICECCN), 2013
In that paper examines the enactment of ripple (otherwise called as wavelet) based Multi-user MIMO OFDM systems and also compare with the performance of FFT based MIMO OFDM. Wavelet based OFDM has lot of advantages compare to the FFT based OFDM. There is no need for cyclic prefix, flexibility and optimal resolution.
D. Meenakshi, S. Prabha, N. R. Raajan
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Multipath signal effect on the capacity of MIMO, MIMO-OFDM and spread MIMO-OFDM

15th International Conference on Microwaves, Radar and Wireless Communications (IEEE Cat. No.04EX824), 2004
MIMO (multiple-input multiple-output), MIMO-OFDM (MIMO orthogonal frequency division multiplexing) and spread MIMO-OFDM systems are considered as candidates for future broadband wireless services. In order to compare their performances, the effects of multipath signal propagation on the capacity, under both single and multi-user channel, are examined ...
P. Uthansakul, M.E. Bialkowski
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Downlink Multiuser MIMO-OFDM Systems

2012
Multiple input multiple output (MIMO) techniques for wireless communication systems have attracted in the last years huge research activity due to the possibility of improving the link performance by increasing the channel capacity and decreasing the bit-error rate (BER).
Sebastian Aust, Andreas Ahrens, Francisco Cano-Broncano, César Benavente-Peces   +3 more
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MIMO OFDM PAPR Reduction Techniques

International Journal of Innovative Science and Research Technology
Wireless communication plays a vital role in modern life. Over time, and with the rise in user demands, the field of communication has experienced significant advancements. To enhance transmission efficiency, single-carrier wave systems are increasingly being replaced by multi-carrier wave technologies such as MIMO-OFDM, which has become widely adopted.
P. Sarthika, S. Avanthika, R. Karthikeya, M. Abhinav Reddy, Y. Prathyusha, D. Ramadevi   +5 more
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Standardization of MIMO-OFDM Technology

2008 IEEE International Networking and Communications Conference, 2008
Standards development organizations around the world are making rapid advances in adopting MIMO-OFDM as the technology of choice for emerging broadband wireless standards. These include IEEE 802.11n - the next generation standard for wireless local networking, IEEE 802.16e - a new standard for metropolitan area networks, and 3 GPP Long Term Evolution ...
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