The Direction of Arrival (DOA) is regarded as the best initial sorting parameter for locating enemy radar. The Direction finding (DF) systems are employed for estimating the direction of arrival of radar installation. Among all the techniques Amplitude Comparison Direction Finding (ADF) technique is the simplest. The Amplitude Comparison DF compares amplitude of the signal at multiple receivers...

This paper introduces two shon-time spectral amplitude estimators for speech enhancement with multiple microphones. Based on joint Gaussian models of speech and noise Fourier coefficients the clean speech amplitudes are estimated with respect to the MMSE or the MAP criterion. The estimators outperform single microphone minimum mean square amplitude estimators when the speech is highly correlate...

This paper presents a novel technique to detect ships and estimate their velocities. The technique takes advantage of two existing techniques and inserts some innovation by using the Radon Transform to detect the ship wake and estimate the range velocity component. For detection, cross correlation of split-look is used. To estimate the azimuth velocity component a sequence of single-look SAR im...

Depth estimation has been used widely as a tool for rapid interpretion of large-scale potential-field data in applications such as mapping basement relief. Nearly all of these techniques rely on the analysis of the local shape of the anomalous field in determining the depth and location of the subsurface sources. These methods focus on the phase information at the expense of the amplitude of th...

This paper describes the possibility of estimating the apparent power of a signal component using the interpolation of the products of amplitude discrete Fourier transform (DFT) coefficients. As with energy-based approach for the amplitude square estimation of the onechannel signal, the apparent power in the two-channel case can be estimated with the multiplied amplitude DFT coefficients around...

This article deals with the estimation of sinusoidal parameters for non stationary sinusoids. It will be shown that for linear amplitude and frequency modulation only the frequency modulation creates additional estimation bias for the standard sinusoidal parameter estimator. Then a new algorithm for frequency domain demodulation of spectral peaks is proposed that can be used to obtain an approx...

In this paper we introduce a new method for muscle force estimation from multi-channel surface electromyograms. The method combines a motor unit twitch model with motor unit innervation pulse trains, which are estimated from multi-channel surface electromyograms. The motor unit twitches are then aligned to the innervation pulse trains and summed up to obtain the total muscle force. The method w...

Watermarking is the process of imperceptibly embedding a message (watermark) into a host signal (audio, video). The resulting signal is called a watermarked signal. The message should introduce only tolerable distortion to the host signal and it should be recoverable by the intended receiver after signal processing operations on the watermarked data. Watermarking schemes based on quantization t...

The "Polynomial Phase transform (PPT)", was presented in [l] as a tool for the estimation of the parameters of constant amplitude polynomial phase signals. Extensions of the algorithm have also been proposed in [2] to be able to deal with parameter estimation for multiple components and for time-varying amplitude. While the P P T is computationally efficient and almost statistically efficient a...

Parameter estimation based on binary quantized observations is considered given the estimation system does not know which of a set of quantizers was used, without replacement, for each block of observations. Thus the estimation system receives permutated blocks of quantized samples of a signal in noise with unknown signal amplitude. Maximum likelihood (ML) estimators are utilized to estimate bo...