Results 141 to 150 of about 3,508 (187)
Some of the next articles are maybe not open access.
Advanced TOA Estimation For Multipath Channels
2020 IEEE/ION Position, Location and Navigation Symposium (PLANS), 2020In this paper, estimation of time of arrival (TOA) in multipath environments is tackled as it is considered a real limiting factor in terrestrial and GNSS positioning systems. Novel methods are presented for designing novel near-causal filters and TOA-Matched Filters (TOA-MF) that facilitate estimation of the TOA. Near and far multipath are effectively
Rabih Chrabieh +3 more
openaire +1 more source
Multipath Channel Tracking in OFDM Systems
2007 IEEE 18th International Symposium on Personal, Indoor and Mobile Radio Communications, 2007High-quality channel estimation and tracking is central for coherent detection in wireless communication systems. Typical tracking algorithms assume the number of multipath components and delays to be known and constant, while their ampli- tudes may vary in time.
D. Angelosante, E. Biglieri, M. Lops
openaire +2 more sources
Multipath channel modeling with chaotic attractors
Proceedings of the IEEE, 2002Previous works have introduced models based on deterministic chaos equations, aiming to simulate transmission processes over mobile radio digital channels at the level of the post detection error stochastic process and to reproduce their renewal or nonrenewal behaviors.
Eugenio Costamagna +2 more
openaire +1 more source
SIMULATION OF A MULTIPATH COMMUNICATION CHANNEL
Інфокомунікаційні та комп’ютерні технології, 2023In the article, the simulation of a multipath communication channel with two bands or subbands (intervals) of frequencies, the system function of which is expressed in a closed form through elliptic functions. A multipath communication channel is a linear system with time various parameters.
Vitaly Pochernyaev, Viktoriia Sushanova
openaire +1 more source
Signal detection in sparse multipath channels
2009 47th Annual Allerton Conference on Communication, Control, and Computing (Allerton), 2009In this paper, we revisit the problem of signal detection in multipath environments. Existing results implicitly assume a rich multipath environment. Our work is motivated by physical arguments and recent experimental results that suggest physical channels encountered in practice exhibit a sparse structure, especially at high signal space dimension (i ...
Matthew Malloy, Akbar M. Sayeed
openaire +1 more source
Bandwidth scaling for fading multipath channels
IEEE Transactions on Information Theory, 2002Summary: We show that very large bandwidths on fading multipath channels cannot be effectively utilized by spread-spectrum systems that (in a particular sense) spread the available power uniformly over both time and frequency. The approach is to express the input process as an expansion in an orthonormal set of functions each localized in time and ...
Muriel Médard, Robert G. Gallager
openaire +2 more sources
Spectrogram analysis of multipath fading channels
2015 IEEE 26th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC), 2015The analysis of the Doppler power spectral density (PSD) of measured and simulated data is an important topic in the area of mobile radio channel modelling. In this paper, we estimate the Doppler PSD of multipath fading channels by using the concept of the spectrogram.
Matthias Pätzold 0001, Neji Youssef
openaire +1 more source
On OFDM Ranging Accuracy in Multipath Channels
IEEE Systems Journal, 2014Wireless networks with ranging and localization capabilities enable new applications. The performance of wireless ranging depends on both the transmission technique and the propagation channel. Understanding such dependence is crucial to the design of high-accuracy ranging algorithms.
Tianheng Wang +4 more
openaire +1 more source
Characterization of multipath fading channels: channels with specular components
IEEE Transactions on Wireless Communications, 2005A set of parameters collectively called recentered normalized mean square correlation (RC-NMSR) are introduced to characterize the quality of multipath fading channels with nonzero specular components. The consideration of nonzero specular components requires nontrivial generalization of the parameters previously introduced for wide-sense stationary ...
Do-Sik Yoo, Wayne E. Stark
openaire +1 more source
Fuzzy channel estimation in multipath fading CDMA channel
11th IEEE International Symposium on Personal Indoor and Mobile Radio Communications. PIMRC 2000. Proceedings (Cat. No.00TH8525), 2002We study a multipath fading CDMA channel and introduce a fuzzy tracking method to estimate the complex channel coefficients in the downlink. The receiver is the conventional RAKE. The results given by the traditional alpha tracker, differential demodulation and known coefficients are compared to each other.
Antti Niemi +2 more
openaire +1 more source