Comparison of random phasing methods for reducing beam pointing errors in phased array

Jiang, Wei; Ye, Guo; Ting-hua, Liu; Shen, Wenhui; Cao, Wei

doi:10.1109/tap.2003.811105

Cited by 42 publications

(17 citation statements)

References 3 publications

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“…Angle resolution is 10 bits (0.35 deg) to minimize angle quantization errors, which have a greater effect on beamforming than randomly distributed errors. Quantized errors and approaches to correcting them are described by Smith and Guo [1983] and more recently by Jiang et al [2003]. The resulting phasor from the look‐up table has a precision of 12 real and 12 imaginary bits, to minimize artifacts arising from quantization and modulation of the primary signal.…”

Section: Hardware Implementationmentioning

confidence: 99%

Real‐time beamforming using high‐speed FPGAs at the Allen Telescope Array

Barott¹,

Milgrome

Wright

et al. 2011

Radio Science

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[1] The Allen Telescope Array (ATA) at the Hat Creek Radio Observatory (HCRO) is a wide-field panchromatic radio telescope currently consisting of 42 offset-Gregorian antennas each with a 6 m aperture, with plans to expand the array to 350 antennas. Through unique back-end hardware, the ATA performs real-time wideband beamforming with independent subarray capabilities and customizable beam shaping. The beamformers enable science observations requiring the full gain of the array, time domain (nonintegrated) output, and interference excision or orthogonal beamsets. In this paper we report on the design of this beamformer, including architecture and experimental results. Furthermore, we address some practical considerations in large-N wideband beamformers implemented on field programmable gate array platforms, including device utilization, methods of calibration and control, and interchip synchronization.

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Section: Hardware Implementationmentioning

confidence: 99%

Real‐time beamforming using high‐speed FPGAs at the Allen Telescope Array

Barott¹,

Milgrome

Wright

et al. 2011

Radio Science

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show abstract

“…The quantization error that arises from the discrete nature of digitally controlled attenuators and phase shifters is strongly coupled to the steering angle and beam shaping algorithm. It should therefore be modeled as a deterministic variable in a specific beam direction instead of as a uniform random process [11], [12]. Mutual coupling is an inter-channel effect by which signals fed to each antenna couple with each other.…”

Section: Introductionmentioning

confidence: 99%

Accurate Statistical Model of Radiation Patterns in Analog Beamforming Including Random Error, Quantization Error, and Mutual Coupling

Lee

Song

2021

IEEE Trans. Antennas Propagat.

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“…Methods to solve the problem so far are various random phasing methods, i.e., the Phased-added Method [1,3]. the Method of Two Probable Value [2] and the Method of Mean Phase error Equal-to-zem [1,3].…”

Section: Introductionmentioning

confidence: 99%

“…the Method of Two Probable Value [2] and the Method of Mean Phase error Equal-to-zem [1,3]. These random phasing methods can improve the pointing accuracy af phased arrays with zero mean pointing errors and small variance.…”

Section: Introductionmentioning

confidence: 99%