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.
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Showing 1 to 17 of 17 for “"Cramer-Rao lower bound (CRLB)"”.
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An efficient and computationally attractive localization algorithm under large equal radius scenario
… position covariance matrices 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 …
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Weak interference direction of arrival estimation in the GPS frequency band
… the INR of the weak GPS interference is close or lower than this range, GPS signals need to be mitigated as they act like strong interferences. A Multiple Subspace Projection (MSP) algorithm is proposed to cancel GPS signals. This algorithm projects the received signal onto the orthogonal subspace …
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Essays on contract theory and organizational economics
… contract) for given effort level has a unique lower bound. The second property is an equivalence between the first order condition (Mirrlees-Holmstrom Condition) and the Cramer-Rao Lower Bound (CRLB). These two properties provide the foundations for (1) identifying optimality, and (2) …
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A Model-Based Approach to Demodulation of Co-Channel MSK Signals
… (MVU) estimator exists 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 …
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Target localization in MIMO radar systems
… distributed over an 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 …
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Target localization in passive and active systems : performance bonds
… (SNR) and of system parameters. To this end, lower bounds on the maximum likelihood estimator (MLE) performance 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 …
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Parameter estimation for exponential signals in colored noise using the pseudo-autoregressive (PAR) model
… (AR) noise environment. 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 …
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Chemical identification under a poisson model for Raman spectroscopy
… thesis is to develop algorithms and performance bounds for the identification of chemicals from their Raman spectra. First, a Poisson measurement model based on the physics of a dispersive Raman device is presented. The problem is then expressed as one of deterministic parameter estimation, and …
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Direction of arrival estimation for spinning antenna based electronic intelligence systems
… by the popular performance benchmark, the Cramer Rao lower bound (CRLB); the proposed Bayesian DOA estimators are capable of improving the DOA estimation accuracy by merging the information contained in several snapshots (antenna scans). This thus supports the hypothesis that biased DOA …
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Collaborative Information Processing in Wireless Sensor Networks for Diffusive Source Estimation
… and samples approach infinity, and derive the Cramer-Rao lower bound (CRLB) on its performance. In case of a moving diffusive source, we propose a particle filter (PF) based target tracking scheme for moving diffusive source, and analytically derive the posterior Cramer-Rao lower bound (PCRLB) …
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Doppler-only target tracking for a multistatic radar exploiting FM band illuminators of opportunity
… and therefore, a 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 …
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Optimal Indoor Positioning, Trajectory Reconstruction and Localisation with Uncertainty Control using Radio-Frequency Measurements
… positioning uncertainty 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 …
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Adaptive DS-CDMA multiuser detection for time variant frequency selective Rayleigh fading channel
… and the performance quickly approaches the Cramer-Rao lower bound (CRLB) while maintaining a computational complexity that is as low as the order of the signal dimension.
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Efficient localization methods for a point source and rigid body
… stationary and moving cases, can approach the Cramer-Rao lower bound (CRLB) performance under Gaussian noise over the small error region. Under AOA measurements, we solve the 3D scenario that is seldom considered before, through estimating its distances to landmarks and contrasting the landmark …
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Higher order asymptotic inference in remote sensing of oceanic and planetary environments
… estimates that attain 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 …
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On quantifying the quality of information in social sensing
… quantifies the estimation confidence using the Cramer-Rao lower bound (CRLB) from estimation theory. More specifically, this thesis addressed the QoI quantification challenge of social sensing from the following perspectives. First, we developed an analytically-founded Bayesian interpretation of …
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Statistical Analysis of Geolocation Fundamentals Using Stochastic Geometry
… benchmark for localization 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 …