2018 IEEE MTT-S International Conference on Microwaves for Intelligent Mobility (ICMIM) 2018
DOI: 10.1109/icmim.2018.8443352
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Enhancement of Doppler Unambiguity for Chirp-Sequence Modulated TDM-MIMO Radars

Abstract: Current automotive radar sensors enhance the angular resolution using a multiple-input multiple-output approach. The often applied time-division multiplexing scheme has the drawback of a reduced unambiguous Doppler velocity proportional to the number of transmitters. In this paper, a signal processing scheme is proposed to regain the same unambiguous Doppler as in the single-input multiple-output case with only one transmit antenna. Simulation and measurement results are shown to prove that the signal processi… Show more

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Cited by 37 publications
(16 citation statements)
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“…Such a set-up is common in the time division multiplexing scheme, which is widely used to obtain the orthogonality between multiple transmitters. In the following section, we demonstrate that the proposed network can resolve the velocity ambiguity problem without hardware changes (e.g., overlapping elements [42]), changes in the transmission scheme (e.g., frequency shift [43], [44]), or additional signal processing steps [45].…”
Section: A Data Acquisitionmentioning
confidence: 94%
“…Such a set-up is common in the time division multiplexing scheme, which is widely used to obtain the orthogonality between multiple transmitters. In the following section, we demonstrate that the proposed network can resolve the velocity ambiguity problem without hardware changes (e.g., overlapping elements [42]), changes in the transmission scheme (e.g., frequency shift [43], [44]), or additional signal processing steps [45].…”
Section: A Data Acquisitionmentioning
confidence: 94%
“…The motion-induced phase error which leads to errors in the DoA estimation is compensated as described in [14]. The TDM usually reduces the maximum unambiguous velocity, which is restored by evaluating the phase trend along the virtual aperture as described in [15]. The used bandwidth of 2 GHz leads to a range resolution of 7.5 cm.…”
Section: Measurement Data Characteristicsmentioning
confidence: 99%
“…by the number of used transmitters M . With the solution presented in [36] the same unambiguous Doppler velocity as for the single-input multiple-output (SIMO) case can be achieved with phase evaluation of the virtual aperture.…”
Section: Tdm Mimo Limitations and Their Compensationmentioning
confidence: 99%