Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 30 for “"CRLB"”.
-
Target localization in MIMO radar systems
… area, are studied. The Cramer-Rao lower bound (CRLB) for target localization accuracy is developed for both coherent and noncoherent processing. The CRLB is shown to be inversely proportional to the signal effective bandwidth in the noncoherent case, but is approximately inversely proportional …
-
An efficient and computationally attractive localization algorithm under large equal radius scenario
… can approach the Cramer-Rao Lower Bound (CRLB) when the LER conditions are sufficiently satisfied. Simulation results are included and assessed by comparing with the CRLB. We also analyze the performance degradation due to the presence of sensor position error, and take them into account …
-
Received Signal Strength-Based Localization of Non-Collaborative Emitters in the Presence of Correlated Shadowing
… (ML) estimator and Cram\' er Rao lower bound (CRLB) for RSS-based localization given do not account for correlated shadowing. This paper presents a new ML estimator and CRLB for RSS-based localization that account for spatially correlated shadowing and imperfect knowledge of the emitter's …
-
Cramer-Rao Lower Bound Derivation and Performance Analysis for Space-Based SAR SMTI
… thesis develops the Cram ́er-Rao Lower Bound (CRLB) for multi-channel space- borne synthetic aperture radar (SAR) system and provides surface moving target in- dication (SMTI) performance analysis. A multi-channel moving target signal model is derived in satellite earth-fixed earth-centered …
-
Biodiversity and dynamics of direction finding accuracy in bat biosonar
… a given direction (Cram{'e}r-Rao lower bound, CRLB). CRLB values were estimated for numerical beampattern estimates derived from 330 individual shape samples, 157 noseleaves (used for emission) and 173 outer ears (pinnae). At an assumed unit[60]{dB} signal-to-noise ratio, the average value of …
-
Weak interference direction of arrival estimation in the GPS frequency band
… estimation variance. The Cramer-Rao Lower Bound (CRLB) is derived and analysed for the antenna array DOA estimation. By using the CRLB, the number of snapshots is required to be larger than 1×10⁶ to have the DOA estimation standard deviation to be smaller than 0.25⁰ for a signal with a SNR of …
-
Fast all-digital carrier synchronization techniques for linear modulation formats
… estimator achieving the Cramér-Rao lower bound (CRLB). The bit-error-rate (BER) degradation agrees with the redicted one with, at most, an extra 0.1 dB loss for a practical implementation in field programmable gate array (FPGA) technology. The autocorrelation-based DA FF frequency estimator, …
-
Model-based myelin water fraction mapping: analyses and improvement
… demonstrate through both Cramér-Rao lower bound (CRLB) analyses and Monte Carlo simulations that the three signal models are all very unstable inherently. Comparatively speaking, however, we demonstrate the theoretical advantage of the 3-exponential models over the multi-exponential model in …
-
Ultraviolet (UV) Laser Implementation, Signal Model, and Measurement Sensitivities in Filtered Rayleigh Scattering for Aerodynamic Flows
… and deriving the Cramér-Rao lower bound (CRLB) for each quantity. The effects of different flow conditions, Mie and geometric scattering levels, cesium vapor cell temperature, and spectral resolution are demonstrated. It is found that the best possible theoretical measurement results are …
-
Statistical Analysis of Geolocation Fundamentals Using Stochastic Geometry
… error, such as the Cramer-Rao lower bound (CRLB), can be calculated for a given localization strategy, e.g., time-of-arrival (TOA), angle-of-arrival (AOA), etc. While this CRLB calculation provides excellent insight into expected localization performance, its traditional treatment as a …
-
Optimizing range aware localization in wireless sensor networks (WSNs)
… paths. The fundamental Cram´er- Rao lower bound (CRLB) on ToF and RSS ranging performance is compared with the performance limits of IEEE 802.1.5.4 compliant modules. The experimental results for both outdoor and indoor LOS path demonstrated that RSS is a good candidate for range estimation at …
-
Higher order asymptotic inference in remote sensing of oceanic and planetary environments
… minimum variance, the Cramer-Rao Lower Bound (CRLB), as well as practical design thresholds. These conditions are derived by first expanding the bias and covariance of the MLE in inverse orders of sample size or SNR, where the firstorder covariance term is the CRLB. The necessary sample sizes …
-
Doppler-only target tracking for a multistatic radar exploiting FM band illuminators of opportunity
… direct comparison to the Cramer Rao Lower Bound (CRLB) is unrealistic and accordingly a new theoretical lower bound, called the Cumulative CRLB was derived that does account for time history measurements. Although the best results for this thesis are achieved by using long integration periods (4 …
-
Spatial Audio for Bat Biosonar
… performance. The Cramer-Rao lower bounds (CRLB) of the estimator are also computed with various d and SNR conditions. The CRLB which is for TDOA based methods does not cover the effects of different incident angles to the capsules and signal delays between the capsules due to a non-zero d, …
-
Optimal Indoor Positioning, Trajectory Reconstruction and Localisation with Uncertainty Control using Radio-Frequency Measurements
… to a value close to the Cramer–Rao Lower Bound (CRLB), a measure which is then used in the proceeding chapters for developing optimal anchor configurations for positioning problem with guaranteed estimation uncertainties. The findings in the positioning part are also used to address the …
-
Essays on contract theory and organizational economics
… Condition) and the Cramer-Rao Lower Bound (CRLB). These two properties provide the foundations for (1) identifying optimality, and (2) performing statistical inference on the agent's primitives based on an observed sequence of pairs of outputs and payments. The paper shows that under some …
-
A Model-Based Approach to Demodulation of Co-Channel MSK Signals
… that satisfies the Cramer-Rao lower bound (CRLB) with equality. This framework allows us to derive the best estimators for a single-user and a two-user case. These concepts can also be extended to wideband signals and it is shown that the MVU estimator for Direct Sequence Spread Spectrum …
-
Exploiting Signals of Opportunity for High-Precision PNT: Optimized Bayesian Estimation Across 5G and LEO Networks
… positioning. Third, the Cramér–Rao lower bound (CRLB) for multi-receiver LEO Doppler positioning is derived under spatially correlated atmospheric conditions, providing a theoretical benchmark for evaluating differential architectures. Fourth, a base-station-aided differential LEO framework is …
-
Target localization in passive and active systems : performance bonds
… are studied. The Cramer-Rao lower bound (CRLB) for coherent passive localization of a near-field source is derived. It is shown through the Cramer-Rao bound that, the coherent localization systems can provide high accuracies in localization, to the order of carrier frequency of the …
-
Parameter estimation for exponential signals in colored noise using the pseudo-autoregressive (PAR) model
… We derive the Cramer-Rao Lower Bound (CRLB) for the parameters of damped exponential signals in the colored noise case. A closed-form expression for the Cramer-Rao Lower Bound for the Pseudo-Autoregressive (PAR(<i>M,p</i>) model is obtained. Some special cases are investigated, for …
Page 1 of 2