Results 191 to 200 of about 222,342 (217)

3D atomic structure reveals evolution of prions in templated amplification in vitro

open access: yes
Bieschke J   +11 more
europepmc   +1 more source
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Performance of MPSK trellis-coded modulation in Rayleigh fading with an imperfect phase reference

IEE Proceedings I Communications, Speech and Vision, 1992
The pairwise error probability for a trellis-coded multiple phase shift keying (MPSK) system with imperfect phase reference at high signal-to-noise ratios is derived. These results are used to study the effect of phase offset, phase jitter and imperfect differential detection on trellis-coded MPSK. >
Chan, KY, Bateman, A
openaire   +3 more sources

Trellis-coded quantization/modulation over mobile satellite channels with imperfect phase reference

International Journal of Satellite Communications, 1998
In this paper the bit error performance of trellis-coded quantization/modulation (TCQ/TCM) schemes is derived taking into account the quantization noise over mobile satellite channels with imperfect phase reference. The analytical upper bounds are obtained using the Chernoff bounding technique combined with the modified generating functional approach ...
Osman N Uçan
openaire   +3 more sources

Correction of wave-front retrieval errors caused by the imperfect collimation of reference beam in phase-shifting interferometry

Optik, 2014
Abstract In phase-shifting interferometry (PSI) the standard wave retrieval formulae are usually derived based on the condition of a plane reference beam normal to the recording plane. In practice, however, the reference wave may be a spherical wave of large radius or even have a slight inclination at the same time due to the imperfect collimation ...
R.S. Yan, L.Z. Cai, X.F. Meng
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Qpsk-direct-phase regenerator with imperfect reference carrier

IEE Proceedings F Communications, Radar and Signal Processing, 1984
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Coded octal PSK system performance disturbed by imperfect recovered phase reference

Electronics and Communications in Japan (Part I: Communications), 1985
AbstractThere have been various investigations on the PSK modulation technique which is encoded by a convolutional code. For the bandwidth constrained transmission, such as satellite communications, it is important to hold a high information transmission rate.
Tadashi Fujino   +2 more
openaire   +1 more source

Performance of turbo coded signals over partial response fading channels with imperfect phase reference

Proceedings of the 43rd IEEE Midwest Symposium on Circuits and Systems (Cat.No.CH37144), 2002
In this paper, the performance of turbo coded signals are investigated over a new channel model, denoted as 1/spl plusmn/D/sup n//Partial Response Fading Channels (PRFC) with imperfect phase reference. The combined effects of the 1/spl plusmn/D/sup n//PRFC and nonideal coherent receiver on the phase of the received amplitude and of a noisy carrier ...
O.N. Ucan, O. Osman, A. Gumus
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Trellis coded quantization/trellis coded continuous phase modulation over Rician channel with imperfect phase reference

European Transactions on Telecommunications, 2004
AbstractIn this paper, to improve bandwidth efficiency and error performance, trellis coded quantization/trellis continuous phase modulation (TCQ/TCPM) are combined and a trellis coded quantization/trellis coded continuous phase modulation (TCQ/TCCPM) scheme is introduced.
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Performance of trellis coded M-PSK and neural network equivalent systems over partial response-fading channels with imperfect phase reference

Proceedings of ICUPC - 5th International Conference on Universal Personal Communications, 2002
For the first time in the literature, a partial response-fading channel is introduced. The new channel model acts like partial response signalling (PRS) having Rician probability density function. Analytical upper bounds of the trellis coded M-PSK structures are derived using Chernoff bounding technique, combined with the modified generating functional
openaire   +1 more source

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