Time-Modulated FD-MIMO Array for Integrated Radar and Communication Systems

Nusenu, Shaddrack Yaw; Wang, Wen-Qin; Basit, Abdul

doi:10.1109/lawp.2018.2829729

Cited by 40 publications

(22 citation statements)

References 21 publications

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“…Finally, an 8 × 8 space-time coding and programmable metasurface loaded with PIN diodes is fabricated and experimentally tested. The proposed approach is expected to broaden the applications of digital coding metasurfaces significantly, and promises important advantages in scenarios such as wireless communication 36 , 37 and radar systems 38 .…”

Section: Introductionmentioning

confidence: 99%

Space-time-coding digital metasurfaces

et al. 2018

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The recently proposed digital coding metasurfaces make it possible to control electromagnetic (EM) waves in real time, and allow the implementation of many different functionalities in a programmable way. However, current configurations are only space-encoded, and do not exploit the temporal dimension. Here, we propose a general theory of space-time modulated digital coding metasurfaces to obtain simultaneous manipulations of EM waves in both space and frequency domains, i.e., to control the propagation direction and harmonic power distribution simultaneously. As proof-of-principle application examples, we consider harmonic beam steering, beam shaping, and scattering-signature control. For validation, we realize a prototype controlled by a field-programmable gate array, which implements the harmonic beam steering via an optimized space-time coding sequence. Numerical and experimental results, in good agreement, demonstrate good performance of the proposed approach, with potential applications to diverse fields such as wireless communications, cognitive radars, adaptive beamforming, holographic imaging.

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Section: Introductionmentioning

confidence: 99%

Space-time-coding digital metasurfaces

et al. 2018

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“…The communications symbols were embedded in the magnitude or phase difference of the waveform pairs. Similarly, in [11], the communications symbols were embedded in the radar waveform by controlling different spread sequences as orthogonal waveforms for radar, and the receiver decoded the transmitted information by determining which sequence has been transmitted. In [12] and [13], the communications symbols were embedded in the radar waveform by modulating the phase or amplitude of the linear frequency modulation (LFM) waveform for radar so that the radar waveform acted as a carrier for communications.…”

Section: Introductionmentioning

confidence: 99%

Joint Radar-Communication Waveform Designs Using Signals From Multiplexed Users

Cao

Chen

et al. 2020

IEEE Trans. Commun.

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“…In contrast, the PA lacks range-time-focusing transmit beam-steering. Actually, the FDA has been widely investigated in the radar fields [30][31][32][33][34][35][36][37][38]. Recently, because of FDA potentials, it has been utilized in communication applications [27,[39][40][41][42][43].…”

Section: Introductionmentioning

confidence: 99%

Butler Matrix Frequency Diverse Retrodirective Array Beamforming: An Energy-Efficient Technique for mmWave Networks

Nusenu

Asare

2020

Wireless Communications and Mobile Computing

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Millimeter-wave (mmWave) networks with the frequency spectrum ranging from 30 GHz (with wavelength 10 mm) to 300 GHz (with wavelength 1 mm), can support massive wireless data in fifth-generation (5G) systems. Importantly, large colocated antenna elements can be exploited at the base station (BS) to facilitate beam-steering synthesis along the users’ directions. This paper proposes the Butler matrix (BM) frequency diverse retrodirective array (BM-FDRA) beamforming network at the BS for multiuser communications in mmWave networks. We utilize the orthogonal feature of the M×M BM with M elements of the FDRA to create directional beams for concurrent transmission towards different users in range-angle locations. The proposed scheme has the following merits: (a) there is beam-steering orthogonality without beam interferences and (b) there is automatic tracking functionality, i.e., the prior knowledge on the user location is not required by the proposed BM-FDRA at the BS. The proposed method can serve multiple users concurrently using the beam-steering orthogonality property. Furthermore, performance metrics such as the multiaccess secrecy sum rate (SSR) model, bit error rate (BER), system capacity, and energy efficiency are examined. The proposed BM-FDRA scheme achievements are highlighted via simulation results.

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Time-Modulated FD-MIMO Array for Integrated Radar and Communication Systems

Cited by 40 publications

References 21 publications

Space-time-coding digital metasurfaces

Space-time-coding digital metasurfaces

Joint Radar-Communication Waveform Designs Using Signals From Multiplexed Users

Butler Matrix Frequency Diverse Retrodirective Array Beamforming: An Energy-Efficient Technique for mmWave Networks

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