CCAT: multirate DSP for sub-mm astronomy: polyphase synthesis filter bank on FPGA for enhanced MKID readout

Ruixuan (Matt) Xie; Adrian K. Sinclair; James Burgoyne; Scott Chapman; Anthony Huber

doi:10.1117/12.3020586

16 August 2024 CCAT: multirate DSP for sub-mm astronomy: polyphase synthesis filter bank on FPGA for enhanced MKID readout

Ruixuan (Matt) Xie, Adrian K. Sinclair, James Burgoyne, Scott Chapman, Anthony Huber

Author Affiliations +

Proceedings Volume 13102, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XII; 1310213 (2024) https://doi.org/10.1117/12.3020586
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

The next-generation mm/sub-mm/far-IR astronomy will in part be enabled by advanced digital signal processing (DSP) techniques. The Prime-Cam instrument of the Fred Young Submillimeter Telescope (FYST), featuring the largest array of submillimeter detectors to date, utilizes a novel overlap-channel polyphase synthesis filter bank (OC-PSB) for the AC biasing of detectors, implemented on a cutting-edge Xilinx Radio Frequency System on Chip (RFSoC). This design departs from traditional waveform look-up-table(LUT) in memory, allowing real-time, dynamic signal generation, enhancing usable bandwidth and dynamic range, and enabling microwave kinetic inductance detector (MKID) tracking for future readout systems. Results show that the OC-PSB upholds critical performance metrics such as signal-to-noise ratio (SNR) while offering additional benefits such as scalability. This paper will discuss DSP design, RFSoC implementation, and laboratory performance, demonstrating OC-PSB’s potential in submillimeter-wave astronomy MKID readout systems.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Ruixuan (Matt) Xie, Adrian K. Sinclair, James Burgoyne, Scott Chapman, and Anthony Huber "CCAT: multirate DSP for sub-mm astronomy: polyphase synthesis filter bank on FPGA for enhanced MKID readout", Proc. SPIE 13102, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XII, 1310213 (16 August 2024); https://doi.org/10.1117/12.3020586

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