In-Band Full-Duplex Radar-Communication System

Hassani, Seyed Ali; Lampu, Vesa; Parashar, Karthick; Anttila, Lauri; Bourdoux, André; Liempd, Barend van; Valkama, Mikko; Horlin, François; Pollin, Sofie

doi:10.1109/jsyst.2020.2992689

Cited by 21 publications

(14 citation statements)

References 21 publications

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“…In this test, two persons, labeled by A and B in the picture, walk away (A) and run toward (B) the prototyped system, which is placed in a corridor and emits a 40 MHz OFDM communication signal. Note that here, we skipped the sum in (16) and mapped the first 20 filter coefficients directly to the distance axis as such it improves the graphical drawing of the 2D graph. Given 80 MHz sampling rate, we calculate the maximum detectable range R max =37.5 m. This experiment proves the ability of the proposed technique in this paper to detect multiple targets at different ranges and velocities.…”

Section: Radar Performancementioning

confidence: 99%

“…Besides, as mentioned in Section I, the required hardware via implementing the proposed approach in this work is more efficient than the technique in [16]. The reason is two-fold: a) the approach in [16] requires several IQ mixers to obtain the Doppler information of each radar range bean while the proposed technique in this work reuses the already existing blocks from the DiSIC. b) Since the adaptive filter update rate is less than the sampling rate, the approach in this work requires partially smaller logic for decimation.…”

Section: Radcom Fpga Resource Usagementioning

confidence: 99%

“…In [14] and [15], we introduced an IBFD transceiver architecture that also achieves environment sensing opportunistically. The design is prototyped in [16], where a classical correlation-based radar is deployed on top of an IBFD platform. Such a radar-communication (RadCom) system performs short-range mono-static Doppler-sensing on the sample domain, operating over the standardized waveforms, and without the complexity of the DFRC systems or the requirement of bi-static counterparts.…”

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confidence: 99%

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Joint In-Band Full-Duplex Communication and Radar Processing

Hassani

Liempd

Bourdoux

et al. 2022

IEEE Systems Journal

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In-band full-duplex (IBFD) technology has the potential to not only double the communication throughput but also enable additional capabilities. The fusion of radar and communication subsystems is an excellent example of how IBFD facilitates integration of radar functionality into a communication system. Developing and analysis of a joint IBFD radar-communication (RadCom) system is at the core of this study. This system derives the range-Doppler image from the state of an adaptive filter, which already exists in a typical IBFD transceiver. Our approach is waveform-independent and reuses the RF front-end while it requires little additional digital logic. The proposed system is prototyped to assess the modemradar coexistence in a real-world IBFD communication link budget. Employing the prototyped system, we quantify the additional required logic resources and investigate whether such a RadCom approach dictates a trade-off between the two intended functionalities. The experimental results show that the proposed solution enables a communication system to detect targets within 20 m while maintaining an IBFD link with another communication node.

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Section: Radar Performancementioning

confidence: 99%

Section: Radcom Fpga Resource Usagementioning

confidence: 99%

mentioning

confidence: 99%

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Joint In-Band Full-Duplex Communication and Radar Processing

Hassani

Liempd

Bourdoux

et al. 2022

IEEE Systems Journal

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“…As a consequence, FD operation is required implying a simultaneous transmit-and-receive (STAR) mode [34] -even in time-division duplexing (TDD) based networks, when viewed from the sensing function's point of view. Thus, one major technical challenge is the self-interference (SI) between TX and RX, which requires SI cancellation (SIC) to provide sufficient TX-RX isolation [35]. This is one of the JCAS challenges addressed in this article, through the beamforming design and optimization.…”

Section: A State-of-the-artmentioning

confidence: 99%

Beamformer Design and Optimization for Full-Duplex Joint Communication and Sensing at mm-Waves

Barneto¹,

Riihonen²,

Liyanaarachchi³

et al. 2021

Preprint

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In this article, we study the joint communication and sensing (JCAS) paradigm in the context of millimeter-wave (mm-wave) mobile communication networks. We specifically address the JCAS challenges stemming from the full-duplex operation and from the co-existence of multiple simultaneous beams for communications and sensing purposes. To this end, we first formulate and solve beamforming optimization problems for hybrid beamforming based multiuser multiple-input and multiple-output JCAS systems. The cost function to be maximized is the beamformed power at the sensing direction while constraining the beamformed power at the communications directions, suppressing interuser interference and cancelling full-duplexing related self-interference (SI). We then also propose new transmitter and receiver beamforming solutions for purely analog beamforming based JCAS systems that maximize the beamforming gain at the sensing direction while controlling the beamformed power at the communications direction(s), cancelling the SI as well as eliminating the potential reflection from the communication direction and optimizing the combined radar pattern (CRP). Both closed-form and numerical optimization based formulations are provided. We analyze and evaluate the performance through extensive simulations, and show that substantial gains and benefits in terms of radar transmit gain, CRP, and SI suppression can be achieved with the proposed beamforming methods.

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“…F ULL-duplexing can theoretically double the spectral efficiency of bidirectional communication links, when compared to systems using time-division or frequency-division duplexing, while also facilitating lower latencies and simplified usage of spectral resources [1]- [3]. Recently, full-duplex technology has also been used to enable joint communications and radar, where simultaneous data transmission and environmental sensing within a common radio system is pursued [4]- [6]. Therefore, full-duplex technology is of great interest when designing and building next-generation wireless systems and networks.…”

Section: Introductionmentioning

confidence: 99%