Results 241 to 250 of about 147,755 (277)

Microdiversity on rician fading channels

IEEE Transactions on Communications, 1994
formats, coherent phase shift keying (CPSK) and -noncoherent frequency shift keying (NCFSK). Results using both maximal ratio combining (MRC) and selection diversity combining (SC) are presented for comparison. Our results show that from a feasibility and practical tradeoffs point of view, the performance of an EG combiner may be as good as that of a ...
Adnan A. Abu-Dayya, Norman C. Beaulieu
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Diversity transform for fading channels

IEEE Transactions on Communications, 1996
This paper investigates a transform that provides diversity to words of symbols transmitted over fading channels. This diversity transform (DRT) does not alter the distance between the input words nor the bandwidth or the information rate. The transform is based on an orthonormal transform and thus increases the channel alphabet.
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Adaptive channel precoding for slowly fading channels

5th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, Wireless Networks - Catching the Mobile Future., 2002
The bit error rate (BER) performance of a mobile or personal radio digital communications system at a high bit rate can be increased significantly by intersymbol interference (ISI) due to multipath propagation. In this paper, a novel adaptive channel precoder is proposed to improve the system performance with-out increasing the complexity of the ...
Weihua Zhuang, Witold A. Krzymien, Paul Goud   +2 more
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Generalized decorrelators for fading channels

Proceedings International Conference on Information Technology: Coding and Computing, 2002
An iterative pilot symbol aided detector for random multipath fading channels that does not neglect intersymbol interference (ISI) is studied for a CDMA uplink system with multiple receiver antennas. The algorithm resolves the received signals at each antenna into components corresponding to each path for every user.
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Ergodic channel capacity for generalized fading channels

2014 IEEE Wireless Communications and Networking Conference (WCNC), 2014
The ergodic channel capacity (ECC) of single-branch receivers is studied under the scenarios described by means of α-η-μ, α-к-μ, and α-λ-μ-η generalized fading channels. Novel expressions are derived, which are the most general in this scientific area.
Anastasios K. Papazafeiropoulos, Tharmalingam Ratnarajah   +1 more
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On the capacity of generalized-k fading channels

IEEE Transactions on Wireless Communications, 2007
This paper investigates the capacity of generalized- K fading channels. This very general model describes accurately composite multipath/shadowing fading channels which are widely encountered in real-world environments. We derive closed-form expressions for three adaptive transmission techniques, namely, i) optimal rate adaptation with constant power ...
Amine Laourine, Mohamed-Slim Alouini, Sofiène Affes, Alex Stephenne   +3 more
openaire   +1 more source

Adaptive coded modulation for fading channels

Proceedings of ICC'97 - International Conference on Communications, 1998
We propose a variable-power and variable-rate coded MQAM modulation technique for high-speed data transmission on fading channels. Coding gain is obtained by superimposing trellis codes designed for AWGN channels on the adaptive modulation, and we obtain the same coding gains as these codes exhibit in AWGN.
Andrea J. Goldsmith, Soon-Ghee Chua
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Distortion Exponent of Parallel Fading Channels

2006 IEEE International Symposium on Information Theory, 2006
We consider the end-to-end distortion achieved by transmitting a continuous amplitude source over M parallel, independent quasi-static fading channels. We analyze the high SNR expected distortion behavior characterized by the distortion exponent. We first give an upper bound for the distortion exponent in terms of the bandwidth ratio between the ...
Deniz Gündüz, Elza Erkip
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Target Tracking Over Fading Channels

IEEE Transactions on Communications, 1976
The problem of tracking a target in a multitarget environment when the observations are received over a fading channel is considered. The optimal Bayes solution to the tracking problem in such cases involves growing memory and hence is not feasible.
F. S. Chang, M. D. Srinath
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On coding for fading channels

1998 URSI International Symposium on Signals, Systems, and Electronics. Conference Proceedings (Cat. No.98EX167), 2002
We discuss the coding design criteria for some classical fading channel models. If the channel is not stationary, as it happens for example in a mobile-radio communication system where it may fluctuate in time between the extremes of Rayleigh and AWGN, then a code designed to be optimum for a fixed channel model might perform poorly when the channel ...
E. Biglieri, G. Caire, G. Taricco
openaire   +1 more source