A new parameter estimation method for a point moving harmonic source with unknown moving velocity and frequency is presented in this paper. The time-frequency representation of the source signal is taking the place of traditional time correlation estimation methods. For a harmonic source moving at constant velocity, the received signal which is amplitude and frequency modulated has no spatial c...

The joint time-frequency analysis (JTFA) is a signal processing technique in which signals are represented in both the time domain and the frequency domain simultaneously. Recently, this analysis technique has become an extremely powerful tool for analyzing nonstationary time series. One basic problem in business-cycle studies is how to deal with nonstationary time series. The market economy is...

A new method for robust estimation of fundamental frequency (F0) from speech signal is proposed in this paper. The method exploits the high SNR regions of speech in time and frequency domains in the outputs of single frequency filtering (SFF) of speech signal. The high resolution in the frequency domain brings out the harmonic characteristics of speech clearly. The harmonic spacing in the high ...

We present a method for estimating the instantaneous frequency of a signal. This method involves the calculation of a time–frequency energy density of the signal, then obtaining an instantaneous frequency estimate from this joint density. Time–frequency energy density is calculated as a least squares optimal combination of multi–window Gabor based evolutionary spectra. The optimal weights are o...

Estimation schemes of Radio Frequency IDentification (RFID) tag set cardinality are studied in this paper using Maximum Likelihood (ML) approach. We consider the estimation problem under the model of multiple independent reader sessions with detection errors due to unreliable radio communication links and/or collisions. In every reader session, both the detection error probability and the total...

Processor Frequencies Sampsa Fabritius Raimondas Lencevicius Edu Metz Alexander Ran Nokia Mobile Phones, Sinitaival 5, FIN-33720 Tampere, Finland Nokia Research Center, 5 Wayside Road, Burlington, MA 01803, USA [email protected] [email protected] [email protected] [email protected] Abstract. This paper describes a new approach to experimentally estimate the applica...

A pulse diversity-based jammer cancellation processor is designed in this paper to cancel the deception electronic counter measures (ECM) signals repeated by a digital radio frequency memory (DRFM) for radar systems. In order to remove the conventional stationary hypotheses and the rigorous application conditions, an orthogonal transmission block code set is achieved in one pulse repetition int...

This paper studies orthogonal frequency-division multiplexing (OFDM) system channel estimation problem in the interference environment and the channel delay estimation algorithm is proposed. The algorithm consists of the narrowband interference detection and suppression and channel time delay estimation. First of all, this paper studied the statistical characteristics of channel frequency domai...

Analysis of linear time-varying (LTV) systems is closely related to time-varying spectral analysis of nonstationary processes. In this paper, we link together the classical theory of linear time-varying systems and wellknown concepts from time-varying spectral analysis. Formulation of the generalized Weyl correspondence provides a unified time-frequency (TF) framework for linear system analysis...

Estimating the frequency of sinusoidal components is the first part of the sinusoidal analysis chain. Among numerous frequency estimators presented in the literature, we propose to study an estimator proposed in [1] known as the derivative algorithm. Thanks to a trigonometric interpretation of this frequency estimator, we are able to propose a new estimator which improves estimation performance...