TOA-based localization error modeling of distributed MIMO radar for positioning accuracy enhancement

To reduce the influence on localization accuracy resulting from low azimuth angle accuracy, localization with time of arrival (TOA) is proposed for Multiple-input Multiple-output (MIMO) Radar systems. In this paper, the localization error model based on the intersection of Same Delay Contours (SDC) defined by TOA is proposed. Analytic expression for localization Root-Mean-Square error is proposed to study localization performance, and SDC variance zone is proposed as a new approach to evaluate localization performance. Numerical simulations are included to support and corroborate the theoretical developments and analytic results.