The asymptotic statistical resolution limit (SRL), denoted by d, characterizing the minimal separation to resolve two closely spaced far-field narrowband sources for a large number of observations, among a total number of MZ2, impinging on a linear array is derived. The two sources of interest (SOI) are corrupted by (1) the interference resulting from the M 2 remaining sources and by (2) a broa...

The use of carrier phase data is the main driver for high-precision Global Navigation Satellite Systems (GNSS) positioning solutions, such as Real-Time Kinematic (RTK). However, observations are ambiguous by an unknown number cycles, and their in RTK relies on process mapping real-valued ambiguities to integer ones, so-called Integer Ambiguity Resolution (IAR). goal IAR enhance position solutio...

This paper mainly deals with an extension of the matrix Slepian-Bangs (SB) formula to elliptical symmetric (ES) distributions under assumption that arbitrary density generator depends on unknown parameters, aiming rigorously quantify and understand impact this ES distributed parametric estimation models. SB is derived in a unified way within framework real (RES) circular (C-CES) or noncircular ...

Unlike low-rank matrix decomposition, which is generically nonunique for rank greater than one, low-rank threeand higher dimensional array decomposition is unique, provided that the array rank is lower than a certain bound, and the correct number of components (equal to array rank) is sought in the decomposition. Parallel factor (PARAFAC) analysis is a common name for low-rank decomposition of ...

.In this paper we present ranging algorithms for Ultrawideband (UWB) communications systems and evaluate their performance in indoor propagation environment. Using the UWB transmission technique for ranging is motivated by position accuracy that varies with the inverse of the bandwidth; the larger the bandwidth, the finer the time resolution and therefore the greater the obtained accuracy. We s...

The problem of signal direction-of-arrival (DOA) estimation in partly calibrated arrays composed of multiple subarrays with unknown intersubarray parameters and imperfectly known subarray orientations is studied. The recently developed spectral and root versions of the rank reduction estimator (RARE) are applicable to scenarios where no intersubarray calibration is available, but unfortunately,...

Carrier frequency offset (CFO) estimation in multiuser multiple-input multiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM) system is investigated this study. MIMO-OFDM very sensitive to CFOs due oscillator mismatch and/or Doppler shift. Inaccurate CFO results intercarrier interference (ICI) through the loss of orthogonality among subcarriers. In paper, performance ML and APF...

The problem of frequency estimation a single sinusoid observed in colored noise is addressed. Our estimator based on the operation sinusoidal digital phase-locked loop (SDPLL) which carries information its phase error after noisy has been acquired by SDPLL. We show computer simulations that this beats Cramer-Rao bound (CRB) variance for moderate and high SNRs when general low-pass filtered (LPF...

A closed-form Cramér-Rao bound (CRB) for general multi-modal measurements is derived for D-dimensional network localization (D ∈ {2,3}). Links are asymmetric and the measurements among neighboring nodes are non-reciprocal depending on an arbitrary differentiable function of their position difference, subject to additive Gaussian noise (with variance that may depend on distance). The provided bo...

Near-field source localization problem by a passive antenna array makes the assumption that the time-varying sources are located near the antenna. In this situation, the far-field assumption (planar wavefront) is no longer valid and we have to consider a more complicated model parameterized by the bearing (as in the far-field case) and by the distance, named range, between the source and a refe...