Imaging radar is a key perception technology for automotive and industrial applications. A lot of progress has been made with high channel count systems, deploying, example, 12 transmit 16 receive channels cascaded monolithic microwave integrated circuit solutions. Nevertheless, fully automated driving requires even higher angular resolution drive-under/drive-over decisions exact predictions object trajectories in dense urban scenarios. Both problems can be solved by increasing the antenna...

In this paper the design and measurement verification of optimized planar sparse arrays for use in wireless localization applications are presented. Existing literature on array optimization has mainly been concerned with intended imaging applications. As requirements 3-D multipath environments essentially different, we made an analysis parameters important specific application. The set challenging practically relevant layout was defined, including a restriction to small number antennas...

This paper presents a novel coherent full-duplex (FD) double-sided two-way ranging (CFDDS-TWR) technique for wireless locating and velocity measurement between separate radio units. The idea presented here is quantum leap in since it enables ranging, continuous phase tracking, units that operate incoherently with low-cost crystal oscillator clock sources. Frequency modulated wave chirp sequences are exchanged FD manner two signals transmitted from received, respectively, by each of the...

Sensitivity and performance of homodyne radar are notably improved if the phase noise terms transmit receive signals correlated canceled out by receiver. However, in a bistatic setup with separate oscillators, this correlation is inherently not given. To achieve good carrier coherency, it required to radio frequency (RF) reference, e.g., using high-quality RF cables, optical fibers, or wireless point-to-point links. All these options complex, costly, prone distortions signal delay...

We propose a model-based compressed sensing (MBCS) of FBG arrays (FBGA), interrogated with wavelength scanning incoherent optical frequency domain reflectometry. This method measures the response FBGA an electrical vector network analyzer combined tunable laser. Instead usual inverse discrete Fourier transform (IDFT), we apply direct estimation grating reflectivities simple model. A reconstruction 10 gratings spaced by 20 cm is demonstrated. MBCS allows to reduce number measurement...

This paper presents a wireless positioning concept based on time domain reflectometry (TDR) chipless radio frequency identification (RFID) landmarks. The is intended for vehicle or mobile robot localization in indoor scenarios. Chipless RFID tags are well suited to serve as uniquely recognizable landmarks industrial warehouse scenarios due their unlimited life cycle and robustness. tag information read the position measured with an ultra-wideband modulated continuous wave reader 7.875 GHz...

Despite their inability to provide distance or angular information, single-channel continuous-wave radar systems are widely used measure vital parameters. Their popularity arises from the simplicity of required components, low demands on sampling rate and processing effort, costs. To obtain health data such as respiration rates, heart variability, change signal phase due displacement body surface is measured. Typical models in literature only consider relevant information assume that behaves...

Wireless local positioning systems are based on measurements of signal time flights and/or bearing angles to determine the position an active transmitter in 3-D space. Traditional time-of-flight and angle with such require many data samples at high rates fulfill Nyquist criterion. Moreover, multipath channels ability classical processing methods resolve delay vectors multiple transmission paths is strictly limited by radio frequency bandwidth aperture size. In this paper, we show that...

We propose the use of 3D-printed helix antennas for millimeter-wave radar imaging. This concept is promising a number reasons: Additive manufacturing involving 3D-printing relatively cost efficient fabrication technique and offers increased geometrical freedom design compared to conventional processes. From an imaging point view, using advantageous because circular polarization emit. That way, thin dipole-like structures possible regardless their orientation. In contrast, systems linearly...

Localization of vehicles in industrial environments is a challenging task due to the high demands on radar system because harsh environmental conditions and strong multipath propagation. Chipless radio identification (RFID) well suited for this type its low-cost production extreme robustness against influences. Furthermore, RFID transponders based time domain reflectometry can be interrogated by chirp sequence systems. To achieve data capacities acceptable tag dimensions, we use an...

This paper presents a novel radar technology for precise position measurements (e.g. crane positioning) between two cooperating units that is especially suited use in harsh industrial environments. The concept uses the coherent full-duplex double-sided two-way ranging (CFDDS-TWR) FMCW secondary and combines beat frequency estimation phase tracking even though work incoherently. CFDDS-TWR method allows an efficient suppression of multipath distortions enables displacement measurement with...