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Frequency estimation in the presence of Doppler spread: performance analysis
2001
IEEE Transactions on Signal Processing
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In this paper, we are concerned with the estimation of the frequency of a complex sinusoid that has been corrupted by complex-valued multiplicative and additive noises. ...
The latter gives insights into the effective coherent and noncoherent SNRs for frequency estimation. ...
We derived finite-and large-sample expressions for the variance of the pulse-pair method, which estimates the frequency from the phase of the th lag of the correlation. ...
doi:10.1109/78.912922
fatcat:4z4kddshw5avbnga5o2yk5vmdi
Efficient Use of Spectral Resources in Wireless Communication Using Training Data Optimization
[article]
2019
arXiv
pre-print
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One of the most important resources in wireless communication is frequency spectrum. This thesis provides different solutions towards increasing the spectral efficiency. ...
Having one of the sequences especially designed for radar purposes (by designing it such that it has an impulse-like autocorrelation), the system will be able to sense the environment, transmit and receive ...
The optimal placing of the training data is discussed in (5) where the expression in closed-form for the MMSE estimate of the channel assess as a function of training data arrangement for block fading ...
arXiv:1903.12259v1
fatcat:kd2yxugwkvghzlnplqv7i7h5g4
Frequency offset compensation of pilot symbol assisted modulation in frequency flat fading
1997
IEEE Transactions on Communications
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In non-fading or very slow fading cases, reference [15] has pointed out that for n << N, the estimator Gn / n with larger lag (n) produces better estimate of (2. ...
The most significant problem in narrowband fading channel communications is to produce an estimate of the time-varying MD for demodulation. ...
doi:10.1109/26.649760
fatcat:ad3gkpfonne5jklc4st4hplq6e
Low Complexity Phase-Unaware Detectors Based on Estimator-Correlator Concept
[chapter]
2011
Ultra Wideband Communications: Novel Trends - System, Architecture and Implementation
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In fact, any MAP receiver used in a fading channel with AWGN has an estimator-correlator interpretation having an MMSE estimator, possibly nonlinear. ...
When ∆ = / , , the pulses are always orthogonal irrespective of the value of . However, for an arbitrary ∆ we can always find a phase offset for which the pulses are orthogonal. ...
doi:10.5772/18005
fatcat:zbstvmonnfchleu4spdwce67oy
Basis expansion models and diversity techniques for blind identification and equalization of time-varying channels
1998
Proceedings of the IEEE
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Blind methods are reviewed for estimating the bases' parameters and the model orders. ...
The time-varying impulse response of rapidly fading mobile communication channels is expanded over a basis of complex exponentials that arise due to Doppler effects encountered with multipath propagation ...
Tsatsanis of Stevens Institute of Technology for his collaboration and discussions which initiated and formulated a number of topics in this paper. ...
doi:10.1109/5.720248
fatcat:h43hiokxwzc3xaltzqrjxdediu
Iterative detection for multicarrier transmission employing time-frequency concentrated pulses
2003
IEEE Transactions on Communications
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An analysis of the computational complexity and bit-error rate performance of the iterative detection scheme is provided for wide-sense stationary uncorrelated scattering channels. ...
We consider multicarrier transmission schemes in which the elementary signal pulses relate to the elements of a Weyl-Heisenberg system, i.e., resulting from a prototype function shifted in time and frequency ...
In fact, even for a Gaussian pulse with high TF signal concentration, the frequency selectivity of, e.g., the channel used in the following performance analysis leads to a much steeper decay of the MFB ...
doi:10.1109/tcomm.2003.810811
fatcat:outcxr24drhtfffmnbtmirj5fm
Noncoherent ultra-wideband systems
2009
IEEE Signal Processing Magazine
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His research interests are in wireless communication, especially narrowband multiuser detection, digital modulation techniques, channel modeling, diversity techniques, and ultra-wideband communications ...
The channel coefficient h has been introduced in (4) to express the fading of the received pulse energy for individual channel realizations. ...
It has been decomposed in a channel coefficient h, which can express fading or an incomplete energy capture due to a mismatch of the integration interval with the pulse timing, and in a mean pulse energy ...
doi:10.1109/msp.2009.932617
fatcat:fmukf6ij3ffm5ppi4cg7kxqqfa
A Message-Passing Receiver for BICM-OFDM Over Unknown Clustered-Sparse Channels
2011
IEEE Journal on Selected Topics in Signal Processing
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We propose a factor-graph-based approach to joint channel-estimation-and-decoding (JCED) of bit- interleaved coded orthogonal frequency division multiplexing (BICM-OFDM). ...
In order to exploit these channel-tap structures, we adopt a two-state Gaussian mixture prior in conjunction with a Markov model on the hidden state. ...
The receiver samples through the reception pulse , obtaining and applies an -DFT to each time-domain sequence , yielding the frequency-domain sequences for . ...
doi:10.1109/jstsp.2011.2169232
fatcat:2u2xmqxnd5drrp5rvleeztpdgi
A message-passing receiver for BICM-OFDM over unknown clustered-sparse channels
2011
2011 IEEE 12th International Workshop on Signal Processing Advances in Wireless Communications
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We propose a factor-graph-based approach to joint channel-estimation-and-decoding (JCED) of bit-interleaved coded orthogonal frequency division multiplexing (BICM-OFDM). ...
In order to exploit these channel-tap structures, we adopt a two-state Gaussian mixture prior in conjunction with a Markov model on the hidden state. ...
The receiver samples through the reception pulse , obtaining and applies an -DFT to each time-domain sequence , yielding the frequency-domain sequences for . ...
doi:10.1109/spawc.2011.5990405
fatcat:xui3haswf5fe5em2tkktuqggyu
Advanced signal processing methods for pulsed laser vibrometry
2010
Applied Optics
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noise and fading of the signal in harsh noise conditions. ...
Results show the advantage of the estimators that take into account actual noise statistics, and call for a wider use of TFRs to track the vibration-modulated signal. ...
This work was partly supported by the Délégation Générale de l'Armement, Mission pour la Recherche et l'Innovation Scientifique. ...
doi:10.1364/ao.49.003967
pmid:20648175
fatcat:j6mgabdqdvcqxjsbfilox76zrm
An Iterative Receiver for Fast Fading Channels Using Two Kalman Filters
2011
2011 International Conference on Broadband and Wireless Computing, Communication and Applications
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The contributions of this dissertation are as follows: i) An accurate, low-complexity approach to pilot-assisted fast-fading channel estimation for single-carrier modulation with a turbo equalizer and ...
By taking the uncertainty in decoded data bits into account, the channel Linear Minimum Mean Square Error (LMMSE) estimator of an iterative receiver with a given pilot ratio is obtained. ...
We introduce a method for semiblind estimation of MIMO channels with near-optimal performance and reasonable computational cost. ...
doi:10.1109/bwcca.2011.23
dblp:conf/bwcca/MovahedianM11
fatcat:5kuivdpxrrdllmiay7nbjkseiy
Combining beamforming and orthogonal space-time block coding
2002
IEEE Transactions on Information Theory
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A performance criterion is derived for a frequency-nonselective fading channel and then utilized to optimize a linear transformation of the predetermined code. ...
In addition, a particularly efficient solution method is developed for the special case of independently fading channel coefficients. ...
In order to use the latter method in frequency-division duplex systems, estimates of the channel in the receive mode must first be transformed to the desired carrier frequency before they can be utilized ...
doi:10.1109/18.985950
fatcat:6s3ni6lwl5anhaepxtipn2i4fu
FER Performance Evaluation and Enhancement of IEEE 802.11 a/g/p WLAN over Multipath Fading Channels in GNU Radio and USRP N200 Environment
2018
KSII Transactions on Internet and Information Systems
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In this paper, authors have been evaluated the Frame Error Rate (FER) performance of IEEE 802.11 a/g/p standard 5 GHz frequency band WLAN over Rayleigh and Rician distributed fading channels in presence ...
Here, real-time signal constellations, OFDM signal spectrums etc. are also observed to find the effect of multipath propagation of signals through flat and frequency selective fading channels. ...
below [24] : − = 4 2 �� 3( 2 ) ( − 1) 0 � (18) To estimate the performance of the receiver FER is calculated for different values of SNR (dB) expressed in terms of 0 . ...
doi:10.3837/tiis.2018.01.009
fatcat:rp6ybivsebby5j4yrj7lmpcg34
Parametric Frugal Sensing of Power Spectra for Moving Average Models
2015
IEEE Transactions on Signal Processing
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A new Sequential Parametric Convex Approximation (SPCA) method is proposed for this purpose, which can be initialized from an infeasible starting point, and yet still produce a feasible point for the QCQP ...
Simulations not only reveal the superior performance of the parametric techniques over the globally optimum solutions obtained from the non-parametric formulation, but also the better performance of the ...
Using (8) , each can be expressed as (9) (10) where in (10) , represents the lag of the deterministic autocorrelation sequence of the broadband filter with im-pulse response . ...
doi:10.1109/tsp.2014.2386291
fatcat:2bmhbxpqbja7lct2wyuoeux5dm
Max-SINR ISI/ICI-Shaping Multicarrier Communication Over the Doubly Dispersive Channel
2007
IEEE Transactions on Signal Processing
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For communication over doubly dispersive channels, we consider the design of multicarrier modulation (MCM) schemes based on time-frequency shifts of prototype pulses. ...
We propose a different approach to MCM pulse design, whereby a limited expanse of ISI/ICI is tolerated in modulation/demodulation and treated near-optimally by a downstream equalizer. ...
Examples of these jointly optimized max-SINR (JOMS) pulses are given in Fig. 8 for the system and channel parameters described in Section V. ...
doi:10.1109/tsp.2007.901660
fatcat:kvn36l7d75fs7pnv37lge3vkpi
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