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Evaluating Direct RF Sampling Performance for RFSoC-based Radio-frequency Astronomy Receivers
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As the maximum RF input and output frequencies of the integrated data converters in RFSoC increase, it becomes practical to digitize and synthesize RF signals in the majority of C band directly without analogue up and down mixing circuits. The elimination of the mixer circuits can significantly simplify the architecture of the receivers or readouts for radio astronomy telescopes. For the systems with large bandwidth or high channel counts, direct sampling can dramatically reduce the size and cost of overall system. This paper with focus on summarising part of the preliminary characterization results for direct sampling with RFSoC data converters in higher order Nyquist zones.
Forward citations
Cited by 5 Pith papers
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Low Level RF and Timing System Design for the Cool Copper Collider
Design and prototype testing of an RFSoC-based LLRF system with direct sampling for stabilizing RF fields in the C3 collider cavities.
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Open-loop integration of S-band NG-LLRF with a custom SSA yields amplitude fluctuations of 0.067–0.190% and phase of 0.048–0.085° over 120 pulses, near accelerator requirements.
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Next generation direct RF sampling LLRF control and monitoring system for linear accelerators
A direct-sampling RFSoC LLRF system shows low phase jitter in high-power tests on S- and C-band accelerator structures, though closed-loop feedback remains under development.
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Next Generation LLRF Control and Monitoring System for S-Band Linear Accelerators
A direct-sampling RFSoC-based low-level RF system achieved S-band pulse-to-pulse phase jitter as low as 19 femtoseconds in loopback tests and measured S-band accelerating cavity signals at high power.
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High Precision RF Pulse Shaping with Direct RF Sampling for Future Linear Accelerators
A direct RF-sampling LLRF system generated square, pulsed, phase-reversed, and phase-ramped C-band RF pulses at megawatt power levels, including the rapid phase reversal used for SLED pulse compression.
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