Results 201 to 210 of about 4,234 (257)
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Capacity of Channels With Frequency-Selective and Time-Selective Fading
IEEE Transactions on Information Theory, 2010This paper finds the capacity of single-user discrete-time channels subject to both frequency-selective and time-selective fading, where the channel output is observed in additive Gaussian noise. A coherent model is assumed where the fading coefficients are known at the receiver. Capacity depends on the first-order distributions of the fading processes
Antonia M. Tulino +2 more
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Multicode STBC in Frequency Selective Fading
IEEE GLOBECOM 2007-2007 IEEE Global Telecommunications Conference, 2007Multicode 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 +1 more
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Analysis of Wavelet Modulation in Frequency-Selective Fading
IEEE Transactions on Vehicular Technology, 2005We consider an antipodal signaling system using wavelet modulation with scale diversity over a frequency-selective fading channel. The channel introduces a random gain for each scale. These scale gains are estimated by sending a block of pilot symbols.
Vaibhav Mittal +3 more
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Adaptive channel selection in frequency-selective fading environment
1999 IEEE International Conference on Communications (Cat. No. 99CH36311), 2003This paper proposes an adaptive channel selection method that reduces signal distortion due to frequency selective fading and thereby improving the performance of mobile communication. In this method a channel is adaptively selected by estimating current channel condition with mean square decision error as a measure.
Osamu Muta, Yoshihiko Akaiwa
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Universal Decoding for Frequency-Selective Fading Channels
IEEE Transactions on Information Theory, 2005We address the problem of universal decoding in unknown frequency-selective fading channels, using an orthogonal frequency-division multiplexing (OFDM) signaling scheme. A block-fading model is adopted, where the bands' fading coefficients are unknown yet assumed constant throughout the block.
Ofer Shayevitz, Meir Feder
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The Performance of FSK in Frequency-Selective Rayleigh Fading
IEEE Transactions on Communications, 1983This paper presents measured error-rate performance of binary FSK with discriminator detection in simulated Rayleigh fading with time delay spread. Measured relations between error rate and carrier-to-noise ratio are shown for a range of time delay spreads. We have verified that the effect of time delay spread on error rate can be described by only one
Hamilton W. Arnold, William F. Bodtmann
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Modulation diversity for frequency-selective fading channels
IEEE Transactions on Information Theory, 2003In this article, modulation diversity (MD) for frequency-selective fading channels is proposed. The achievable performance with MD is analyzed and a simple design criterion for MD codes for Rayleigh-fading channels is deduced from an upper bound on the pairwise error probability (PEP) for single-symbol transmission.
Robert Schober +3 more
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A frequency offset estimation technique for frequency-selective fading channels
IEEE Communications Letters, 2001Rapid frequency offset estimation is required in burst communication systems. The performance of traditional open loop frequency estimation techniques is severely degraded by multipath propagation. We present a new data-aided technique for frequency offset estimation in the presence of strong multipath.
Harish Viswanathan +1 more
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Switched-diversity FSK in frequency-selective Rayleigh fading
33rd IEEE Vehicular Technology Conference, 1983This paper presents the measured performance of a 64 kbit/s switched-diversity FSK receiver subjected to simulated frequency-selective Rayleigh fading. The single receiver input is switched between two, three, or four uncorrelated Rayleigh-fading signals whenever the instantaneous receiver output falls below a threshold.
Hamilton W. Arnold, William F. Bodtmann
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Frequency offset estimation in frequency selective fading channels
1997 IEEE 47th Vehicular Technology Conference. Technology in Motion, 2002The challenge of frequency offset estimation in wireless channels and also the effect of delay spread on the performance of some of the existing algorithms is discussed. A new frequency estimation technique based on channel impulse response estimation which is desirable in wireless systems and has a fast convergence speed is addressed with some new ...
A.R.S. Bahai, M. Sarraf
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