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In this contribution, we address the position estimation of thin, conducting plates by means of a frequency-stepped continuous wave (FSCW) radar system. In particular, we focus on polarimetric scattering properties, introduced by an edge at the border of a conducting plate. To account for the edge's contribution to the overall FSCW radar signal, the method of equivalent currents is applied and finally...
In this contribution, we address the position estimation of thin, conducting plates by means of a frequency-stepped continuous wave (FSCW) radar system. In particular, we focus on polarimetric scattering properties, introduced by an edge at the border of a conducting plate. To account for the edge's contribution to the overall FSCW radar signal, the method of equivalent currents is applied and finally...
Local positioning systems which are based on the bistatic frequency modulated continuous wave (FMCW) radar principle generally evaluate the time of flight (TOF) of signals. However, the FMCW principle also provides the power level (PL) of the received signal, which is often neglected since various unknown parameters must be considered. In this contribution, we present a method which exploits this...
This paper describes the development of an array processing system and its integration into the local position measurement system (LPM). The design focus is laid on achieving high speed array processing performance in order to meet existing timing requirements. A field programmable gate array (FPGA) controls the radio frequency receivers and executes the array signal processing algorithms for local...
This contribution addresses radial velocity estimation with a frequency-modulated continuous-wave (FMCW) radar system. The estimator we propose aligns the up- and downchirp information of adjacent sweeps including the phasing of the chirps. The resulting one-dimensional signal depends on the radial velocity and can therefore be used for estimation purposes. Because the phase information between nearby...
Precise position estimation has always been a challenging but highly requested task in many technical problems. The time-difference of arrival (TDOA) based local position measurement system LPM uses the well-known Bancroft algorithm, which computes a closed-form solution to the non-linear range measurement equations. A critical issue of this computation method is that outliers in the measurements...
For target tracking applications it is a well-known technique to model the motion behavior by a finite set of motion models. This contribution discusses two cases in the area of local positioning where the measurement equation is taken from a finite set of possibilities, depending on the actual state of the object. The first case is a multi antenna scenario where it is unknown which antenna actually...
This paper presents the hardware design as well as the implemented sensor fusion algorithms used for navigation purposes in unmanned systems. A design concept is illustrated that has advantages when limited space and changing demands of different unmanned systems are of particular interest. The embedded system demonstrated in this work consists of a Field Programmable gate array (FPGA) board in conjunction...
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