Aperture-Level Self-Interference Cancelation for Full-Duplex Phased Arrays by Phase-Only Transmitting Beamfoming

Yang, Feng; Yang, Shiwen; Chen, Xianzhou; Xu, Yang

doi:10.1109/ap-s/usnc-ursi47032.2022.9886795

Cited by 2 publications

(1 citation statement)

References 6 publications

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“…They combined digital beamforming and digital SIC technology to enhance the isolation performance between the transmit aperture and array elements at different receive positions [ 12 ]. Feng Yang et al [ 13 ] proposed a phase-only transmit beamforming method for aperture-level SIC in full duplex phased arrays. For X-band 8 × 8 transmit and receive subarrays, an average isolation improvement of about 29.3 dB was achieved with only 0.2 dB of transmit gain loss.…”

Section: Introductionmentioning

confidence: 99%

A Sparse Shared Aperture Design for Simultaneous Transmit and Receive Arrays with Beam Constraints

Wei

Xie

et al. 2023

Sensors

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The utilization of efficient digital self-interference cancellation technology enables the simultaneous transmit and receive (STAR) phased array system to meet most application requirements through STAR capabilities. However, the development of application scenario requirements makes array configuration technology for STAR phased arrays increasingly important. Thus, this paper proposes a sparse shared aperture STAR reconfigurable phased array design based on beam constraints which are achieved by a genetic algorithm. Firstly, a design scheme for transmit and receive arrays with symmetrical shared apertures is adopted to improve the aperture efficiency of both transmit and receive arrays. Then, on the basis of shared aperture, sparse array design is introduced to further reduce system complexity and hardware costs. Finally, the shape of the transmit and receive arrays is determined by constraining the side lobe level (SLL), main lobe gain, and beam width. The simulated results indicate that the SLL of the transmit and receive patterns under beam-constrained design have been reduced by 4.1 dBi and 7.1 dBi, respectively. The cost of SLL improvement is a reduction in transmit gain, receive gain, and EII of 1.9 dBi, 2.1 dBi, and 3.9 dB, respectively. When the sparsity ratio is greater than 0.78, the SLL suppression effect is also significant, and the attenuation of EII, transmit, and receive gains do not exceed 3 dB and 2 dB, respectively. Overall, the results demonstrate the effectiveness of a sparse shared aperture design based on beam constraints in producing high gain, low SLL, and low-cost transmit and receive arrays.

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Section: Introductionmentioning

confidence: 99%

A Sparse Shared Aperture Design for Simultaneous Transmit and Receive Arrays with Beam Constraints

Wei

Xie

et al. 2023

Sensors

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Comparative Analysis of Digital Self-Interference Cancellation Methods for Simultaneous Transmit and Receive Arrays

Hu,

Yang,

Zhang

et al. 2024

Electronics

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This paper provides a comprehensive theoretical derivation of the residual noise power and effective isotropic isolation (EII) signal models in baseband digital cancellation, aperture-level digital cancellation, and beamforming spatial cancellation models in simultaneous transmit and receive (STAR) arrays. We simulated and analyzed the isolation performance and self-interference (SI) noise cancellation of STAR systems using digital SI cancellation (SIC) and beamforming in a 32-element planar array. The simulation results show that in the absence of SIC or baseband digital SIC, the EII obtained by receive adaptive beamforming (ABF) is 20 dB higher than that obtained by transmit ABF. On the basis of aperture-level digital SIC, the EII obtained from transmit ABF and receive ABF is basically the same. The EII obtained by baseband digital SIC is 22.5 dB and 41.1 dB lower than that of transmit ABF and receive ABF, respectively. Therefore, baseband digital SIC technology is not required when using transmit ABF and receive ABF.

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Aperture-Level Self-Interference Cancelation for Full-Duplex Phased Arrays by Phase-Only Transmitting Beamfoming

Cited by 2 publications

References 6 publications

A Sparse Shared Aperture Design for Simultaneous Transmit and Receive Arrays with Beam Constraints

A Sparse Shared Aperture Design for Simultaneous Transmit and Receive Arrays with Beam Constraints

Comparative Analysis of Digital Self-Interference Cancellation Methods for Simultaneous Transmit and Receive Arrays

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