Successive Self-Interference Cancellation in a Low-Complexity WCP-OFDM Radar Receiver

Mercier, Sébastien; Roque, Damien; Bidon, Stéphanie

doi:10.1109/acssc.2018.8645413

Cited by 6 publications

(5 citation statements)

References 8 publications

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“…Otherwise, the OFDM receiver experiences the inter-pulse interference, usually characterized as white random sidelobes at the output of symbol-based receivers [66]. Such a situation may cause target masking issues and must be mitigated in many realistic scenarios (e.g., high number of targets, clutter), for example, with the help of CLEAN-based techniques [67] or with sparse Bayesian MCMC processing [68].…”

Section: A Communication Signal-based Approachesmentioning

confidence: 99%

Radio Resource Management in Joint Radar and Communication: A Comprehensive Survey

Luong

Hoang

et al. 2021

IEEE Commun. Surv. Tutorials

126

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Joint radar and communication (JRC) has recently attracted substantial attention. The first reason is that JRC allows individual radar and communication systems to share spectrum bands and thus improves the spectrum utilization. The second reason is that JRC enables a single hardware platform, e.g., an autonomous vehicle or a UAV, to simultaneously perform the communication function and the radar function. As a result, JRC is able to improve the efficiency of resources, i.e., spectrum and energy, reduce the system size, and minimize the system cost. However, there are several challenges to be solved for the JRC design. In particular, sharing the spectrum imposes the interference caused by the systems, and sharing the hardware platform and energy resource complicates the design of the JRC transmitter and compromises the performance of each function. To address the challenges, several resource management approaches have been recently proposed, and this paper presents a comprehensive literature review on resource management for JRC. First, we give fundamental concepts of JRC, important performance metrics used in JRC systems, and applications of the JRC systems. Then, we review and analyze resource management approaches, i.e., spectrum sharing, power allocation, and interference management, for JRC. In addition, we present security issues to JRC and provide a discussion of countermeasures to the security issues. Finally, we highlight important challenges in the JRC design and discuss future research directions related to JRC.

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Section: A Communication Signal-based Approachesmentioning

confidence: 99%

Radio Resource Management in Joint Radar and Communication: A Comprehensive Survey

Luong

Hoang

et al. 2021

IEEE Commun. Surv. Tutorials

126

View full text Add to dashboard Cite

show abstract

“…[l, n] is specifically related to the presence of random elements (i.e., the data symbols c k,m ) in the transmitted signal (1). It is worth underlining that since we assume the data symbols to be known, they could in theory be used to remove the pedestal of each scatterers (e.g., see [39]). This strategy is out of the scope of this work.…”

Section: Sinr Performancementioning

confidence: 99%

Comparison of Correlation-Based OFDM Radar Receivers

Mercier

Bidon

Roque

et al. 2020

IEEE Trans. Aerosp. Electron. Syst.

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Various correlation-based receivers have been proposed in passive bistatic and active monostatic radar exploiting orthogonal frequency-division multiplexing (OFDM) communications signals, but too little has been dedicated to establishing their relations and advantages over each other. Accordingly, this paper provides an analytical comparison of the common filters in such waveform sharing scenarios, along with a performance analysis regarding three criteria: computational complexity, signal-tointerference-plus-noise-ratio and resilience to ground clutter. The last two especially assess the possible detrimental effects of the random sidelobes (or pedestal) induced by the data symbols in the range-Doppler map. Although simulations show that none of the filters performs unanimously better, the ones employing circular correlations globally evidence attractive results.

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“…This calls for new hardware, to replace the TDD RF switching with more elaborate circulator [20], [23]- [25] or EBD [12], [26], [27] type of circuitries, and has been studied actively over the recent years, under the inband full-duplex radio terminology, with primarily communications applications in mind, see, e.g., [19], [23], [37]- [45]. In the radar context, the self-interference (SI) stemming from the direct coupling of the transmit signal to the receiver can be interpreted as a strong static target at a very short distance [11], [12], [33], [46]. Hence, one could argue that as long as a certain level of TX-RX isolation can be provided, such that the low noise amplifier (LNA) and the rest of the sensitive receiver electronics can tolerate the remaining SI, the true echoes stemming from true targets can be separated in the radar processing.…”

Section: Self-interference Problem and Cancellation Solutions Amentioning

confidence: 99%

“…This is one clear difference to all earlier fullduplex radio works, such as [41], [47], [48], that do not separate between the direct and reflected SI components. Additionally, we note that agnostic digital cancellation techniques, independent of the specific radar processing approach are pursued, which can then be complemented with, e.g., the CLEAN-like methods [11], [12], [32], [33] operating in the radar domain.…”

Section: B Rf and Digital Cancellation Solutionsmentioning

confidence: 99%

Full-Duplex OFDM Radar With LTE and 5G NR Waveforms: Challenges, Solutions, and Measurements

Barneto

Riihonen

Turunen

et al. 2019

IEEE Trans. Microwave Theory Techn.

208

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This paper studies the processing principles, implementation challenges, and performance of OFDM-based radars, with particular focus on the fourth-generation Long-Term Evolution (LTE) and fifth-generation (5G) New Radio (NR) mobile networks' base stations and their utilization for radar/sensing purposes. First, we address the problem stemming from the unused subcarriers within the LTE and NR transmit signal passbands, and their impact on frequency-domain radar processing. Particularly, we formulate and adopt a computationally efficient interpolation approach to mitigate the effects of such empty subcarriers in the radar processing. We evaluate the target detection and the corresponding range and velocity estimation performance through computer simulations, and show that highquality target detection as well as high-precision range and velocity estimation can be achieved. Especially 5G NR waveforms, through their impressive channel bandwidths and configurable subcarrier spacing, are shown to provide very good radar/sensing performance. Then, a fundamental implementation challenge of transmitter-receiver (TX-RX) isolation in OFDM radars is addressed, with specific emphasis on shared-antenna cases, where the TX-RX isolation challenges are the largest. It is confirmed that from the OFDM radar processing perspective, limited TX-RX isolation is primarily a concern in detection of static targets while moving targets are inherently more robust to transmitter self-interference. Properly tailored analog/RF and digital selfinterference cancellation solutions for OFDM radars are also described and implemented, and shown through RF measurements to be key technical ingredients for practical deployments, particularly from static and slowly moving targets' point of view.

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Successive Self-Interference Cancellation in a Low-Complexity WCP-OFDM Radar Receiver

Cited by 6 publications

References 8 publications

Radio Resource Management in Joint Radar and Communication: A Comprehensive Survey

Radio Resource Management in Joint Radar and Communication: A Comprehensive Survey

Comparison of Correlation-Based OFDM Radar Receivers

Full-Duplex OFDM Radar With LTE and 5G NR Waveforms: Challenges, Solutions, and Measurements

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