2,478 resources related to Time-varying channels
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ICASSP 2017 - 2017 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)
The ICASSP meeting is the world's largest and most comprehensive technical conference focused on signal processing and its applications. The conference will feature world-class speakers, tutorials, exhibits, and over 50 lecture and poster sessions.
The Marine Technology Scociety and the Oceanic Engineering Society of the IEEE cosponor a joint annual conference and exposition on ocean science, engineering, and policy. The OCEANS conference covers four days. One day for tutorials and three for approx. 500 technical papers and 150 -200 exhibits.
The purpose of these workshops is to bring together individuals from the IEEE and elsewhere with common interests in digital signal processing resarch and signal processing education. The combined workshop will include 5-6 plenary talks and approximately 150 contributed papers.
Broadcast technology, including devices, equipment, techniques, and systems related to broadcast technology, including the production, distribution, transmission, and propagation aspects.
Telephone, telegraphy, facsimile, and point-to-point television, by electromagnetic propagation, including radio; wire; aerial, underground, coaxial, and submarine cables; waveguides, communication satellites, and lasers; in marine, aeronautical, space and fixed station services; repeaters, radio relaying, signal storage, and regeneration; telecommunication error detection and correction; multiplexing and carrier techniques; communication switching systems; data communications; and communication theory. In addition to the above, ...
The fundamental nature of the communication process; storage, transmission and utilization of information; coding and decoding of digital and analog communication transmissions; study of random interference and information-bearing signals; and the development of information-theoretic techniques in diverse areas, including data communication and recording systems, communication networks, cryptography, detection systems, pattern recognition, learning, and automata.
All telecommunications, including telephone, telegraphy, facsimile, and point-to-point television, by electromagnetic propagation, including radio; wire; aerial, underground, coaxial, and submarine cables; waveguides, communication satellites, and lasers; in marine, aeronautical, space, and fixed station services; repeaters, radio relaying, signal storage, and regeneration; telecommunication error detection and correction; multiplexing and carrier techniques; communication switching systems; data communications; communication theory; and wireless communications.
Chih-hung Lee; Po-ying Chen; Hsueh-jyh Li 2006 IEEE International Conference on Communications, 2006
In this paper we discuss issues about the downlink wideband code division multiple access (WCDMA) in high-speed mobile environments. When the carrier synchronization is considered in the RAKE receiver, it may induce the over Doppler shifting (ODS) problem to the high-speed mobile in a rural area where more than one specular component for the multipath channels exist. This makes the ...
Bin Shen; Rumin Yang; Taiping Cui; Kyungsup Kwak 2010 IEEE International Conference on Ultra-Wideband, 2010
Owing to the advantage of simple circuitry, energy detection based weighted non-coherent receivers (WNCR) have been motivated for impulse radio ultrawideband (IR-UWB) systems in recent years. With an aim to combat the practical channel impairments of different levels, this paper further investigates the combining weights of the WNCR, ending up with two blindly weighted non-coherent receiver (BWNCR) schemes in quasi-static ...
A. Swami; B. Sadler Statistical Signal and Array Processing, 1996. Proceedings., 8th IEEE Signal Processing Workshop on (Cat. No.96TB10004, 1996
We show that the blind linear time invariant (LTI) channel estimation problem, when the input sequence is independent, but has time-varying statistics, mimics that for the i.i.d. case under appropriate persistence of excitation conditions. Hence, consistent parametric and non-parametric estimators based on a single realization are readily obtained. We establish an ergodicity theorem for the time-averages of non-stationary continuous time ...
Eoiyoung Choi; Seung-Bum Suh; Jaehong Kim 2005 IEEE 16th International Symposium on Personal, Indoor and Mobile Radio Communications, 2005
We investigate suitable puncturing patterns for circulant sub-matrices based quasi-cyclic low-density parity-check codes whose binary base matrices have dual-diagonal parity structure with a single weight-3 column. The proposed method develops the existing puncturing criteria, and exploits the structure of the parity-check matrix. The performance of the proposed puncturing patterns is quite competitive with the performance of dedicated codes for individual ...
J. D. Behm; T. J. Endres; P. Schniter; C. R. Johnson; C. Prettie; M. L. Alberi; I. Fijalkow Signals, Systems & Computers, 1997. Conference Record of the Thirty-First Asilomar Conference on, 1997
This paper reports on the gathering, processing, and categorization of empirically derived time-varying channel responses. The passband data and data collection information is provided courtesy of Applied Signal Technology (Sunnyvale, CA). It is the intent of this paper to provide the signal processing community with a database of time-varying fractionally-spaced channel responses and received sequences based on empirical measurements which ...
Communications, 2001. ICC 2001. IEEE International Conference on, 2001
A new non-parametric method is presented for the estimation of linear time- varying (LTV) channels. A basis of smooth local exponentials, which are approximate eigenfunctions of underspread LTV channels, is chosen to select time intervals during which the time variation of the channel is small. The time-varying transfer function is expanded in the basis of smooth local exponentials to obtain ...
Signals, Systems & Computers, 1997. Conference Record of the Thirty-First Asilomar Conference on, 1997
We propose a rate-distortion (RD) approach to the optimization of image coding for transmission over time-varying channels. The information available about the channel error rate, is used to adapt the joint source-channel coding (JSCC) scheme. We focus on structured JSCC schemes to obtain realizations with feasible complexity. The image is hierarchically quantized, followed by unequal channel error protection matched to ...
Sensing, Communication, and Networking (SECON), 2014 Eleventh Annual IEEE International Conference on, 2014
This paper develops a unified approach to obtain optimal transmission schedule for an energy-harvesting node with non-ideal circuit power consumption. For both time-invariant and time-varying fading channels, we show that the optimal transmission between any two consecutive channel or energy state changing time, termed epoch, can only take one of the three strategies: (i) no transmission, (ii) transmission with an ...
Wireless Communications, Networking and Mobile Computing, 2008. WiCOM '08. 4th International Conference on, 2008
Doubly-selective channel estimator for orthogonal frequency division multiplexing (OFDM) systems is proposed in this paper. Based on the generalized complex exponential basis expansion model (GCE-BEM), we describe the time-variant channel with time-invariant coefficients over multiple OFDM blocks. The time variation of channel destroys the orthogonality between subcarriers. The resulting channel matrix in the frequency domain is no longer diagonal, but ...
Communications, IEEE Transactions on, 2004
This paper considers the problem of blind joint channel estimation and data detection for orthogonal frequency-division multiplexing (OFDM) systems in a fading environment. Employing a regression model for a time-varying channel, we convert the problem into one where finding the data sequence ![\bf x](/images/tex/14903.gif) whose associated least-squares (LS) channel estimate ![\bf z(\bf x)](/images/tex/14904.gif) is closest to the space of some ...
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