Results 211 to 220 of about 4,234 (257)

Optimal training for MIMO frequency-selective fading channels

Conference Record of the Thirty-Sixth Asilomar Conference on Signals, Systems and Computers, 2002., 2003
High data rates give rise to frequency-selective propagation effects. Space-time multiplexing and/or coding offer attractive means of combating fading and boosting capacity of multi-antenna communications. As the number of antennas increases, channel estimation becomes challenging because the number of unknowns increases, and the power is split at the ...
Xiaoli Ma, Liuqing Yang 0001, Georgios B. Giannakis   +2 more
openaire   +1 more source

Detection of Multicode STBC Signals in Frequency Selective Fading

2007 IEEE 18th International Symposium on Personal, Indoor and Mobile Radio Communications, 2007
Multicode operation in space-time block coded (STBC) multiple input multiple output (MIMO) systems can provide additional degrees of freedom in code domain to achieve high data rates. In such multicode STBC systems, the receiver experiences code domain interference (CDI) in frequency selective fading.
Saif K. Mohammed, Ananthanarayanan Chockalingam   +1 more
openaire   +2 more sources

Information rates of the noncoherent frequency selective fading channel

2009 47th Annual Allerton Conference on Communication, Control, and Computing (Allerton), 2009
This paper examines ways of improving channel estimation using successive decoding for the time varying frequency selective fading channel in a point to point wireless communication system. The channel state information (CSI) is not known a priori at either the transmitter or the receiver.
Jing Huang, Sundeep Venkatraman, Krishnan Padmanabhan, Oliver M. Collins   +3 more
openaire   +2 more sources

Turbo product codes on frequency selective fading channel

Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367), 2003
In this article, we present a new scheme that combines the turbo product codes with a simple single carrier frequency domain based equalization algorithm. By using transmit diversity in frequency selective Rayleigh fading channels, the system can resist intersymbol interference effectively.
Cong Shi, Zongwang Li, Dijia Wu, Wentao Song 0001, Hanwen Luo 0001   +4 more
openaire   +2 more sources

Improved GFDM equalization in severe frequency selective fading

2017 IEEE 38th Sarnoff Symposium, 2017
This paper presents a method for protecting wireless signals through the creation and exploitation of time-varying spectral redundancy. Redundant symbols are multiplexed in both time and frequency in dynamic patterns within multicarrier symbols which creates the spectral redundancy.
Matt Carrick, Jeffrey H. Reed
openaire   +2 more sources

Frequency selective fading and frequency correlation analysis on indoor fading radio channels

2004 IEEE 59th Vehicular Technology Conference. VTC 2004-Spring (IEEE Cat. No.04CH37514), 2005
This work presents the frequency selective fading and frequency correlation evaluation of several indoor environments; the analysis was made over measurements carried out with a sounder with a 300 MHz bandwidth. A description of the sounder used in the measurements, the sounder parameters and the sounded environments is given.
openaire   +1 more source

Cooperation over frequency-selective fading relay channels

IEEE Transactions on Wireless Communications, 2008
We study information-rate calculations and coded cooperation strategies for relay channels with frequency-selective (FS) fading. We develop suitable channel trellises for the multiaccess and broadcast parts of the relay channel, and employ simulation-based techniques to calculate (approximate) ergodic information-rate bounds with FS Rayleigh fading ...
Jun Hu 0018, Tolga M. Duman
openaire   +1 more source

MIMO antenna system for frequency selective fading channels

11th IEEE International Symposium on Personal Indoor and Mobile Radio Communications. PIMRC 2000. Proceedings (Cat. No.00TH8525), 2002
In this paper, we investigate the use of MIMO antenna system to maximize the average SINR of each packet in the system, with prior knowledge of the channel at the transmitter. Our approach is based on deriving an analytic formula for the average packet SINR and using the Lagrange multiplier method to determine an optimum. Our proposed solution provides
Kai-Kit Wong, Ross D. Murch, Khaled Ben Letaief   +2 more
openaire   +2 more sources

Capacity of frequency selective fading channels

Proceedings of IEEE International Symposium on Information Theory, 2002
We derive a formula for the capacity of frequency selective fading channels, described by stationary ergodic processes. We express the capacity as an integral w.r.t. the limiting distribution of the eigenvalues of a particular channel matrix. We show that this distribution, and the capacity depend on the channel impulse response statistics only.
openaire   +1 more source

A transmit diversity scheme for frequency selective fading channels

Globecom '00 - IEEE. Global Telecommunications Conference. Conference Record (Cat. No.00CH37137), 2002
We propose a transmit diversity scheme for frequency selective fading channels using orthogonal frequency division multiplexing (OFDM). The transmit diversity scheme proposed by Alamouti (see IEEE JSAC, vol.16, no.8, p.1451-58, 1998) for flat fading channels is extended to the case when the channel has a delay spread.
Sriram Mudulodu, Arogyaswami Paulraj
openaire   +2 more sources