${W}$ -Band Time-Domain Multiplexing FMCW MIMO Radar for Far-Field 3-D Imaging

Bleh, D.; Rösch, Markus; Kuri, M.; Dyck, Alexander; Tessmann, A.; Leuther, A.; Wagner, Stefan; Weismann-Thaden, B.; Stulz, H.-P.; Zink, M.; Riessle, M.; Sommer, Rainer; Wilcke, Jorn; Schlechtweg, M.; Yang, Bin; Ambacher, O.

doi:10.1109/tmtt.2017.2661742

Cited by 121 publications

(34 citation statements)

References 16 publications

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“…Table I is ordered by the maximum operating frequency f max and gives an overview of already presented mm-wave FMCW imaging radar systems and their theoretical angular resolution above 77 GHz. In [14]- [16] radar systems at 100 GHz or above are presented.…”

Section: Introductionmentioning

confidence: 99%

“…In [14] and [15], imaging radar systems are realized using an optimized 2-D sparse array. The system concept is based on separate transmit (TX) and receive (RX) modules with a frequency multiplier approach.…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, Table I shows that only [15] and [16] are realized distinctly above 100 GHz. The system architecture in [16] is based on a frequency multiplier with factor 8 and is comparable to [14] and [15], but it uses AoCs.…”

Section: Introductionmentioning

confidence: 99%

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High-Resolution 160-GHz Imaging MIMO Radar Using MMICs With On-Chip Frequency Synthesizers

Dürr

Schwarz

Häfner

et al. 2019

IEEE Trans. Microwave Theory Techn.

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A high-resolution frequency modulated continuous wave imaging radar for short-range applications is presented. A range resolution of about 1 cm is achieved with a bandwidth of up to 16 GHz around 160 GHz. In order to overcome losses and large tolerances on a printed circuit board (PCB), 8 coherently coupled monolithic microwave integrated circuits (MMIC) are used, each with one transmit and receive antenna on-chip and each representing a single channel radar system. The signals on the PCB are below 12 GHz, which facilitates fabrication and enables a design with low-cost substrates. The MMIC comprises a phase noise optimized architecture with a fully integrated on-chip frequency synthesizer. Due to partly uncorrelated phase noise between the frequency synthesizer components, the noise level is increased in bistatic radar measurements between two different MMICs, which is explained by a thorough phase noise analysis. Time-division multiplexing is used to realize a multiple-input multiple-output system with a virtual array of 64 elements and an angular resolution better than 1.5 • for the designed array. The positioning tolerances of the MMICs are included into the design resulting in a robust array design. The high-resolution radar performance is proven by imaging radar measurements of two exemplary scenarios.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

High-Resolution 160-GHz Imaging MIMO Radar Using MMICs With On-Chip Frequency Synthesizers

Dürr

Schwarz

Häfner

et al. 2019

IEEE Trans. Microwave Theory Techn.

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show abstract

“…Unfortunately, conventional highresolution mm-wave imaging systems require the use of either expensive physical arrays [7]- [9] or slow synthetic [10], [11] aperture arrays, thus preventing its pervasive usage in societally important applications. Moreover, conventional phased array imaging systems-see Fig.1(a)-are suboptimal due to the often large mutual information existing between successive measurements [12]. One way to address the aforementioned limitations is to engineer new mm-wave imaging systems capable of making that successive measurements are as incoherent as possible; this will enable real-time operation while reducing the number of measurements, hardware complexity, and required energy budget.…”

Section: Introductionmentioning

confidence: 99%

Experimental Results of a 3-D Millimeter-Wave Compressive Reflector Antenna Imaging System

Zhang¹,

Molaei²,

Heredia-Juesas³

et al. 2019

Antennas Wirel. Propag. Lett.

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This letter presents the first experimental results of our three-dimensional (3D) millimeter-wave (mm-wave) Compressive-Reflector-Antenna (CRA) imaging system. In this prototype, the CRA is 3D-printed and coated with a metallic spray to easily introduce pseudo-random scatterers on the surface of a traditional reflector antenna (TRA). The CRA performs a pseudo-random coding of the incident wavefront, thus adding spatial diversity in the imaging region and enabling the effective use of compressive sensing (CS) and imaging techniques. The CRA is fed with a multiple-input-multiple-output (MIMO) radar, which consists of four transmitting and four receiving ports. Consequently, the mechanical scanning parts and phase shifters, which are necessary in conventional physical or synthetic aperture arrays, are not needed in this system. Experimental results show the effectiveness of the prototype to perform a successful 3D reconstruction of a T-shaped metallic target.

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“…This paper focuses on the time division multiplexing (TDM) scheme, which is used very often, e.g. [1], [2], [3], [4].…”

Section: Introductionmentioning

confidence: 99%

Compensation of Motion-Induced Phase Errors in TDM MIMO Radars

Bechter¹,

Roos²,

Waldschmidt³

2017

IEEE Microw. Wireless Compon. Lett.

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For high-resolution direction of arrival estimation, a wide aperture is necessary. This can be achieved with multipleinput multiple-output (MIMO) radars, which offer a wide virtual aperture. However, the requirement of orthogonal transmit signals has to be satisfied for their operation. Although time division multiplexing (TDM) of the transmit elements is an orthogonality realization with low hardware effort, phase errors occur in nonstationary scenarios. This work briefly discusses the problem of the motion-induced phase errors and describes processing steps to mitigate them without additional effort. The proposed technique is demonstrated with simulation and measurement data.

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${W}$ -Band Time-Domain Multiplexing FMCW MIMO Radar for Far-Field 3-D Imaging

Cited by 121 publications

References 16 publications

High-Resolution 160-GHz Imaging MIMO Radar Using MMICs With On-Chip Frequency Synthesizers

High-Resolution 160-GHz Imaging MIMO Radar Using MMICs With On-Chip Frequency Synthesizers

Experimental Results of a 3-D Millimeter-Wave Compressive Reflector Antenna Imaging System

Compensation of Motion-Induced Phase Errors in TDM MIMO Radars

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