OFDM waveform for distributed radar sensing in automotive scenarios

Schieler, Steffen; Schneider, Christian; Andrich, Carsten; Döbereiner, Michael; Luo, Jian; Schwind, Andreas; Thomä, Reiner S.; Galdo, Giovanni Del

doi:10.1017/s1759078720000859

Cited by 19 publications

(17 citation statements)

References 9 publications

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“…Another OFDM-based radar at 77 GHz used a stepped carrier approach to achieve a sensing resolution of 0.146 m with a bandwidth of 1.024 GHz, while the maximum range is 60 m [29]. Moreover, the authors implemented OFDM-based radar processing for automotive scenario by using a relatively longer interval of 128 ms to achieve speed resolution of 0.22 m/s, while the range resolution was 1.87 m for a bandwidth of 80 MHz at 5.2 GHz [30].…”

Section: Related Workmentioning

confidence: 99%

A W-Band Communication and Sensing Convergence System Enabled by Single OFDM Waveform

Idrees

Saqlain

et al. 2022

Micromachines

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Convergence of communication and sensing is highly desirable for future wireless systems. This paper presents a converged millimeter-wave system using a single orthogonal frequency division multiplexing (OFDM) waveform and proposes a novel method, based on the zero-delay shift for the received echoes, to extend the sensing range beyond the cyclic prefix interval (CPI). Both simulation and proof-of-concept experiments evaluate the performance of the proposed system at 97 GHz. The experiment uses a W-band heterodyne structure to transmit/receive an OFDM waveform featuring 3.9 GHz bandwidth with quadrature amplitude modulation (16-QAM). The proposed approach successfully achieves a range resolution of 0.042 m and a speed resolution of 0.79 m/s with an extended range, which agree well with the simulation. Meanwhile, based on the same OFDM waveform, it also achieves a bit-error-rate (BER) 10−2, below the forward error-correction threshold. Our proposed system is expected to be a significant step forward for future wireless convergence applications.

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Section: Related Workmentioning

confidence: 99%

A W-Band Communication and Sensing Convergence System Enabled by Single OFDM Waveform

Idrees

Saqlain

et al. 2022

Micromachines

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“…The acceleration, passage, and braking processes can be easily depicted. Further details about the measurement campaign are described in [7].…”

Section: Bi‐static Radar Parameters and Test Scenariomentioning

confidence: 99%

“…2 , the radar target drives along the road (green path) through the transmitting and receiving car. Detailed information about the measurement campaign is provided in [ 7 ]…”

Section: Bi‐static Radar Parameters and Test Scenariomentioning

confidence: 99%

Bi‐static delay‐Doppler reference for cooperative passive vehicle‐to‐X radar applications

Schwind

Döbereiner

Andrich

et al. 2020

IET Microwaves, Antennas & Propagation

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“…Modern advancements in wireless technologies have enabled more reliable communications between separate wireless systems, and as a result, several new applications involving distributed systems have emerged over recent years. These include distributed beamforming systems [1], distributed automotive radars [2], [3], and distributed massive MIMO systems [4], among others.…”

Section: Introductionmentioning

confidence: 99%

Online Expectation-Maximization Based Frequency and Phase Consensus in Distributed Phased Arrays

Rashid¹,

Nanzer²

2022

Preprint

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Distributed phased arrays are comprised of separate, smaller antenna systems that coordinate with each other to support coherent beamforming towards a destination. However, due to the frequency drift and phase jitter of the oscillators on each node, as well as the frequency and phase estimation errors induced at the nodes in the process of synchronization, there exists a decoherence that degrades the beamforming process. To this end, a decentralized frequency and phase consensus (DFPC) algorithm was proposed in prior work for undirected networks in which the nodes locally share their frequencies and phases with their neighboring nodes to reach a synchronized state. Kalman filtering (KF) was also integrated with DFPC, and the resulting KF-DFPC showed significant reduction in the total residual phase error upon convergence. One limitation of DFPC-based algorithms is that, due to relying on the average consensus protocol which requires undirected networks, they do not converge for directed networks. Since directed networks can be more easily implemented in practice, we propose in this paper a push-sum based frequency and phase consensus (P s FPC) algorithm which converges for such networks. The residual phase error of P s FPC upon convergence is theoretically derived in this work.Kalman filtering is also integrated with P s FPC and the resulting KF-P s FPC algorithm shows significant Manuscript received 2022.

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OFDM waveform for distributed radar sensing in automotive scenarios

Cited by 19 publications

References 9 publications

A W-Band Communication and Sensing Convergence System Enabled by Single OFDM Waveform

A W-Band Communication and Sensing Convergence System Enabled by Single OFDM Waveform

Bi‐static delay‐Doppler reference for cooperative passive vehicle‐to‐X radar applications

Online Expectation-Maximization Based Frequency and Phase Consensus in Distributed Phased Arrays

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