In this paper we present measured inand output data of a power amplifier (PA). We compare this data with an AM-AM and AM-PM model. We conclude that a more sophisticated PA model is needed to cope with severe memory effects. We suggest to use memory polynomials and introduce two approaches to deduce the polynomial coefficients from the measured data: the Least-Squares and Crosscorrelation approa...

Recently, the new spreading sequence obtained by the Weyl sequence is proposed for CDMA systems. Its crosscorrelation function follows O( 1 N ), where N is the code length of the spreading sequence. In this paper, we optimize the Weyl sequence code design to assign to each user for CDMA systems and we analytically calculate its theoretical SIR (Signal to Interference Noise Ratio). It is theoret...

In this paper, we introduce some methods for finding mutually corresponding dependent components from two different but related data sets in an unsupervised (blind) manner. The basic idea is to generalize cross-correlation analysis by taking into account higher-order statistics. We propose independent component analysis (ICA) type extensions for the singular value decomposition of the crosscorr...

We derive interferometric field representations that are valid for diffusive field methods. The method retrieves the reflection response of the earth, as if the domain above the receiver depth level is homogeneous. It is represented as the flux-normalized up going field deconvolved by the down going field. The deconvolution step can be seen as a weighted crosscorrelation step, which is the usua...

Extended common-image-point (CIP) gathers can be constructed using wave-equation migration by preserving into the output image the non-zero spaceand timelags of the cross-correlation between the source and receiver wavefields. Correct wavefield reconstruction leads to focused events in the extended CIPs, while incorrect reconstruction leads to de-focused events that can be used for velocity mod...

A model registration system capable of tracking an object through distinct aspects in real-time is presented. The system integrates tracking, pose determination, and aspect graph indexing. The tracking combines steerable lters with normalized crosscorrelation, compensates for rotation in 2D and is adaptive. Robust statistical methods are used in the pose estimation to detect and remove mismatch...

Nonlinearity estimation and spectral regrowth prediction are crucial to power amplifier linearization. The correlation techniques shown here can estimate amplifier nonlinearity and predict out-of-band power spectrum. Crosscorrelation is performed between the output envelope and a test sequence generated from the input signal and can be carried out in background during amplifier operations. The ...

This paper presents an approach to analyze experimental data contaminated with noise from Anthropomorphic Test Devices (ATDs). This approach is based on information extraction procedures and they are illustrated through an analysis of Hybrid III 3-year-old and Q3 ATDs test data. The methodology used for extracting information and ATD test data analysis includes optimized filtering, spectral coh...

In this paper, the author analyzes characteristics and extracting method of interference signal of the distributed optical fiber sensing. In the distributed optical fiber sensing, realizing alarm and positioning function only through the crosscorrelation operation will increase the load of the system, can make misinformation rate of the system be improved greatly. Therefore, before the localiza...

The digital watermarking provides the protection against the digital data copying, proceeding distributing among the unauthorized users using easily available software. This paper gives the comparative analysis of digital image watermarking in frequency domain. The parameters used to test the robustness and transparency of the watermarking algorithm are Normalized crosscorrelation coefficient (...