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The stray interference peaks (SIPs) are an important factor resulting in the misjudgment of measurement information in white light interferometer (WLI). SIPs are generated by the residual reflected light beams. We theoretically analyze the interference conditions of the SIP. The analysis shows that these SIPs are discrete main interference peak outside and have different orders. We present a stagger...
Constructing a highly scalable and dense main memory subsystem with large access bandwidth has become a major challenge for modern computing systems. Traditional memory technologies, like DRAM and NAND Flash, suffer from either poor scalability or limited access bandwidth. Recent studies have identified emerging Phase Change Memory (PCM) as one of the most promising low power main memory technology...
Application of a powerful statistical tool, the Pearson distribution family, to signal detection problems is investigated in communications literature for the first time. In order to design high performance detectors, we use a method of moments which relies on the Pearson distribution system to estimate probability density function (PDF) of the additive noise or interference. Using the Pearson PDF...
Active stealth of warship is an important developing direction in modern stealth technology field. Based on scattering properties of warship and characteristics of linear frequency modulated (LFM) signal and its matched filter, the cancellation signal was designed. Warship stealth was achieved through interference cancellation between cancellation signal and radar echo signal. Simulation results show...
Femtocell systems are providing cost-effective high-bandwidth service in wireless cellular systems under very low transmission power compared to macro-cell. Normally, conventional handoff algorithms can't well satisfy the mobility in hierarchy networks because of femtocell's characteristic. Therefore a user's state and SINR-based handoff (SINR-US) algorithm from macrocell to femtocell under the consideration...
The design of beamformer is an important aspect in array signal processing applied in several fields including radar, sonar, wireless communication and so on. The Capon beamformer, which has been used widely because of its many advantages, requires a priori knowledge of array manifold which sometimes it is difficult to obtain in some applications. Thus, the techniques of blind adaptive beamforming...
A narrowband interference suppression algorithm which combined wavelet packet transform with frequency shift is proposed. It first confined the interference in the center of a subband. Then, the signal is decomposed by wavelet packet transform, and interference is suppressed under subband power ratio rule. Finally, the signal is de-noised by soft-thresholding before signal reconstructed. Both analysis...
In this paper, we describe a fully automatic method using latent root regression based on the generalized sidelobe canceler (GSC) parameterization of the minimum variance beamformer. The proposed method gives a theoretically optimal solution in mean-squared error (MSE) sense (minimized MSE solution) by choosing a linear combination of individual latent root regression predictors in the GSC formulation...
In this paper, a novel robust adaptive beamformer based on principal component regression (PCR) is derived. Unlike many existing methods, the proposed method is completely automatic (or so-called parameter-free), which means, it do not need the choice of user parameters. The performance of our approach is illustrated by numerical simulations and compared to other robust adaptive beamformers. The simulation...
The goal of this paper is to present an iterative robust adaptive beamformer using partial least squares (PLS) based on the generalized sidelobe canceller (GSC) parameterization of the minimum variance (MV) beamformer. The proposed method can be implemented simply as an iterative process and does not require the choice of a user parameter. The shrinkage properties and the relations among ridge regression...
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