Motion compensation and efficient array design for TDMA FMCW MIMO radar systems

Schmid, Christian M.; Feger, Reinhard; Pfeffer, Clemens; Stelzer, Andreas

doi:10.1109/eucap.2012.6206605

Cited by 70 publications

(44 citation statements)

References 4 publications

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“…[17] Another approach to increase the angular resolution is to facilitate a multiple input multiple output (MIMO) system concept, that creates an antenna array with additional virtual antenna positions. There is a lot of ongoing research conducted in this area, the example shown in Fig.6 was taken from [18]. A critical issue with this approach is measurement time.…”

Section: Angle Informationmentioning

confidence: 99%

Driving towards 2020: Automotive radar technology trends

Hasch

2015

2015 IEEE MTT-S International Conference on Microwaves for Intelligent Mobility (ICMIM)

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In the last few years automotive radar has been transformed from being a niche sensor to becoming standard even in middle-class cars. With Euro-NCAP ratings now requiring automated braking and pedestrian safety functionality, radar is often identified as the best suited sensor for this purpose. Additionally, future automated driving will require detailed and highly reliable information on the environment and surrounding street traffic. This requires radar sensors to provide more detailed information about the environment, foremost in the spatial domain. Automotive radar has always benefited significantly from technological advances, especially in semiconductor technology and packaging, allowing a better performance and much more functionality in the radar frontend. A second key area is the antenna system, where new concepts to acquire more information about signals reflected from the environment can significantly improve resolution and detection performance.

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Section: Angle Informationmentioning

confidence: 99%

Driving towards 2020: Automotive radar technology trends

Hasch

2015

2015 IEEE MTT-S International Conference on Microwaves for Intelligent Mobility (ICMIM)

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“…With this phase difference the angle under which the target is detected can be calculated using this relation or with a conventional Bartlett beamformer. As the ramps are transmitted at the same time there is no need for a phase error correction as for TDM [5]. [7] to show the working matching and angle estimation for a challenging extended target.…”

Section: Signal Processing Chainmentioning

confidence: 99%

“…This repetition time has an influence on the maximal detectable Doppler frequency [4] which is decreased by the number of transmitting elements. Additionally, if a relative radial velocity of targets is present, a motion compensation is required to compensate phase errors [5].…”

Section: Introductionmentioning

confidence: 99%

Waveform multiplexing using chirp rate diversity for chirp-sequence based MIMO radar systems

Roos¹,

Appenrodt

Dickmann

et al. 2018

2018 IEEE Radio and Wireless Symposium (RWS)

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-MIMO radar systems create a large virtual aperture to enhance the angular resolution. As a multiplexing scheme often the time-division multiplexing (TDM) procedure is chosen. The drawbacks are a reduced maximal unambiguously detectable Doppler frequency and the need to correct a phase error in angle estimation for relative radial velocities. To overcome these disadvantages a multiplexing scheme is proposed which uses different chirp rates. Every transmitting antenna is active at the same time but can be distinguished due to the different slopes of the frequency ramps.

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“…To reduce the calculation effort for radar signal processing in standard scenarios, and increase the sensor performance in complex surroundings a scenario adaptive MIMO technique can be introduced to resolve ambiguities or improve the angular resolution in complex scenarios A critical point in the system architecture is the time invariance of the observed target scenario. To avoid additional movement compensation techniques like those in [19] the modulation time of the FMCW signal should be kept short, so that a complete MIMO observation takes less than some ms. The fast chirp modulations offer additional effective methods for range/velocity estimation and matching using the classical 2D FFT approach or new and advanced signal processing algorithms like compressed sensing.…”

Section: C O N C L U S I O Nmentioning

confidence: 99%

“…Efficient methods for this correction are discussed, e.g. in [19] or [20]. However, the measurement results of the system indicate a very good performance in all relevant cases.…”

Section: C O N C L U S I O Nmentioning

confidence: 99%

Lens-based 77 GHZ MIMO radar for angular estimation in multitarget environments

Lutz

Walter

Weigel

2014

Int. J. Microw. Wireless Technol.

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The demanding tasks for automotive radar systems in multitarget scenarios require an increased target separation performance and new sensor concepts. In this contribution, a highly integrated 77 GHz time domain multiplex (TDM) MIMO radar is presented. The sensor is feasible for advanced direction of arrival (DOA) estimation in azimuth and elevation. For efficient and high-quality measurements a fractional-n phased locked loop (PLL) with integrated waveform generator, enabling chirp and frequency modulated continous waveform (FMCW) modulations, is implemented. Spatial beamforming is done with series feed array patch antennas in combination with a dielectric cylindrical lens. For the improvement of the direction of arrival (DOA) estimation performance a new lens-based MIMO radar approach is introduced. Therefore the classical MIMO approach is combined with the advantages of an optical beamforming concept. Due to the usage of these techniques the sensor performance in accuracy, ambiguity suppression, and angular resolution can be significantly increased.

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Motion compensation and efficient array design for TDMA FMCW MIMO radar systems

Cited by 70 publications

References 4 publications

Driving towards 2020: Automotive radar technology trends

Driving towards 2020: Automotive radar technology trends

Waveform multiplexing using chirp rate diversity for chirp-sequence based MIMO radar systems

Lens-based 77 GHZ MIMO radar for angular estimation in multitarget environments

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