Results 141 to 150 of about 2,923 (181)

The relationship between fading and bandwidth for multipath channels

IEEE Transactions on Wireless Communications, 2005
A signal transmitted over a multipath channel experiences fading, the variability of which is a function of: 1) signal bandwidth; and 2) power delay profiles of the channel's specular and diffuse components. We analyze this general relationship and, for several important classes of multipath channel, we derive simple, closed-form approximations for ...
Martin V. Clark, Larry J. Greenstein
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Multipath Fading Effects on Digital Radio

IEEE Transactions on Communications, 1979
An experimental study of multipath fading effects on an 8-PSK 6 GHz digital radio system was conducted on a 26.4 mi test link near Atlanta, Georgia. Results were obtained for a non-diversity arrangement and a space-diversity arrangement employing a cophasing combiner operating at 70 MHz and fed by two antennas separated by 30 ft.
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Multipath fading in wireless sensor networks

Proceedings of the 2006 international conference on Wireless communications and mobile computing, 2006
Multipath fading heavily contributes to the unreliability of wireless links, causing fairly large deviations from link quality predictions based on path loss models; its impact on wireless sensor networks is considerable. Although analytical models provide a probabilistic description, multipath fading is a deterministic phenomenon.
Daniele Puccinelli, Martin Haenggi
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OAM Transmission in Sparse Multipath Environments with Fading

ICC 2020 - 2020 IEEE International Conference on Communications (ICC), 2020
Orbital angular momentum (OAM), which has attracted much attention recently, is a potential technology to achieve high capacity for future wireless communications. In existing literatures, the OAM-based transmission is assumed to be used in ideal line-of-sight (LoS) scenarios.
Jiatong Zhou, Wenchi Cheng, Liping Liang
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Frequency estimation in slowly fading multipath channels

IEEE Transactions on Communications, 2002
This paper concerns the estimation of a frequency offset of a known (pilot) signal propagated through a slowly fading multipath channel, such that channel parameters are considered to he constant over the observation interval. We derive a maximum-likelihood (ML) frequency estimation algorithm for additive Gaussian noise and path amplitudes having ...
Vladimir M. Baronkin, Yuriy V. Zakharov, Tim C. Tozer   +2 more
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Statistical properties of the capacity of multipath fading channels

2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications, 2009
It is well known that a frequency-nonselective multipath fading channel can be modeled by a sum of complex sinusoids, also called sum-of-cisoids (SOC). By using the SOC, we can efficiently model the scattered component of the received signal in non-isotropic scattering environments.
Gulzaib Rafiq, Matthias Pätzold 0001
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Baseband Multipath Fading Simulator

Radio Science, 1966
A device is described which was built to provide representative fading multipath channel behavior for the investigation of communication system performance. The unit is based on the tapped delay line approach and operates in the band of 50 to 8000 c/s. The tap modulation functions are camgenerated with adjustable correlation.
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Multicode CDMA downlink in shadowed multipath fading

ICC 2001. IEEE International Conference on Communications. Conference Record (Cat. No.01CH37240), 2002
The performance characteristics of a multicode CDMA downlink with systematic convolutional (turbo) coding are obtained under a shadowed multipath fading mobile channel. Two different iterative decoding methods are compared in two different synchronous downlink schemes operating under given channel conditions with the same transmission bandwidth as in ...
Anil Bircan, M. Oguz Sunay, Ali N. Akansu   +2 more
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PSP array processing for multipath fading channels

IEEE Transactions on Communications, 1999
The performance of per-survivor processing (PSP) algorithms with stochastic gradient estimators is investigated for frequency-selective channels and array measurements. The focus is on the degree to which the underlying channel structure can be reliably exploited by such algorithms in tracking the time-varying channel and detecting the data.
Gent Paparisto, Keith M. Chugg
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Bayesian MLSD for multipath Rayleigh fading channels

2008 IEEE International Conference on Acoustics, Speech and Signal Processing, 2008
We propose a tree-search based Bayesian approach to blind maximum likelihood sequence detection (MLSD) of convolutionally encoded data transmitted over a multipath Rayleigh fading channel. In deriving the path metric for searching the channel-code tree, the proposed algorithm incorporates a forgetting factor matched to the time variation of the channel
Hossein Roufarshbaf, Jill K. Nelson
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