Phase Response Calibration of a Distributed Antenna Array for Satellite Acquisition

Anton, Alberto; Garcia-Rojo, Isabel; Giron, Alejandro; Morales, Eva; Martínez, Raquel

doi:10.1109/lawp.2016.2530694

Cited by 2 publications

(3 citation statements)

References 5 publications

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“…where {a k } K k=1 and {ϕ k } K k=1 are true amplitude and phase coefficients, respectively. We still assume that the first antenna is chosen as the reference antenna, the same as (7) and (8). The key to obtain closed-form expressions of ( 20) and ( 21) is to estimate a k in ( 16) and ϕ k in (17).…”

Section: Calibration Accuracy Analysismentioning

confidence: 99%

“…The amplitude and phase errors caused by these factors are time-varying, and accurate beam pointing cannot be ensured only by offline calibration before launch [8,9]. Therefore, online calibration while communicating must be carried out after satellite launch to ensure that RF chains and array elements have predetermined amplitude and phase relations [10,11].…”

Section: Introductionmentioning

confidence: 99%

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Low-Complexity Online Calibration for Large-Scale Multi-Beam Antennas

Lin

Shi

et al. 2023

Electronics

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High-throughput satellite communication based on large-scale multi-beam antennas is a promising technology for sixth-generation (6G) mobile networks. Conventional online calibration methods for large-scale antennas after satellite launch are restricted by communication signals. This paper proposes an online calibration method of amplitude and phase errors without disturbing the normal communication traffic. Two important aspects of calibration are discussed, i.e., closed-form expressions of calibration accuracy and hardware complexity. Simulation results show that theoretical approximation results are close to simulation results when the number of antennas is less than half of the code length. The relative amplitude and phase performance deteriorate by 6.12 dB and 40.96 deg, respectively, when the power is lower than the reference 20 dB. Finally, a calibration experimental system with eight beams is built for verification.

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Section: Calibration Accuracy Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Low-Complexity Online Calibration for Large-Scale Multi-Beam Antennas

Lin

Shi

et al. 2023

Electronics

View full text Add to dashboard Cite

show abstract

“…Under normal circumstances, this can be solved by a complex trajectory estimation model. However, antenna arrays in ground sections need to have high gain, which results in a narrow beam and prolonged period to acquire the accurate data of satellites [1]. Especially under certain scenarios (e.g., launch and early orbit phase (LEOP) of critical maneuvers), ground stations will lose the ability to operate the spacecraft [2].…”

Section: Introductionmentioning

confidence: 99%

Recurrent NEAT Assisted 2D-DOA Estimation With Reduced Complexity for Satellite Communication Systems

Huang

Pedersen

et al. 2022

IEEE Access

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Direction-of-arrival (DOA) estimation plays a vital role in the field of array signal processing. However, the need for heavy computing tasks in most traditional DOA algorithms, e.g., multiple signal classification (MUSIC), makes their engineering practicality significantly compromised in satellite communication systems. The neuroevolution of augmenting topologies (NEAT) can quickly search for appropriate topologies and weights of neural network functions, but its computational complexity is still too high for satellite systems. This paper proposes a modified NEAT architecture featuring a recurrent structure (RNEAT) that only needs a small number of phase components of the received signal covariance matrix as inputs to reduce the complexity and simplify the neural network architecture. The proposed RNEAT incorporated with multiple signal classification (RNEAT-MUSIC) can be easy to achieve high resolution and low complexity simultaneously. Validation has been done by applying the proposed method in a twodimensional direction of arrival estimation (2D-DOA) problem. Results show that the proposed RNEAT-MUSIC efficiently restricts the scanning region before forwarding the covariance matrix to the MUSIC stage. Consequently, the computational workload is reduced by 3/4 compared with the traditional 2D-MUSIC algorithm while maintaining good DoA resolution.INDEX TERMS Direction-of-arrival (DOA), neuroevolution of augmenting topologies (NEAT), multiple signal classification (MUSIC), RNEAT-MUSIC, satellite communication.

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Phase Response Calibration of a Distributed Antenna Array for Satellite Acquisition

Cited by 2 publications

References 5 publications

Low-Complexity Online Calibration for Large-Scale Multi-Beam Antennas

Low-Complexity Online Calibration for Large-Scale Multi-Beam Antennas

Recurrent NEAT Assisted 2D-DOA Estimation With Reduced Complexity for Satellite Communication Systems

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