Digital Frequency Domain Multiplexer for mm-Wavelength Telescopes
Matt Dobbs, Eric Bissonnette, and Helmuth Spieler

TL;DR
This paper introduces an FPGA-based digital signal processing system designed for multiplexed bolometric detectors in mm-wavelength telescopes, enabling precise measurement of cosmic microwave background signals for cosmology research.
Contribution
It presents a novel digital readout system with real-time DSP algorithms and multi-frequency comb synthesis for biasing and reading out detectors in cosmology experiments.
Findings
Successfully synthesizes 8 to 32 carriers for detector biasing
Achieves stable digitization and demodulation of sky signals
Demonstrates effective filtering for low-frequency sky signals
Abstract
An FPGA based digital signal processing (DSP) system for biasing and reading out multiplexed bolometric detectors for mm-wavelength telescopes is presented. This readout system is being deployed for balloon-borne and ground based cosmology experiments with the primary goal of measuring the signature of inflation with the Cosmic Microwave Background Radiation. The system consists of analog superconducting electronics running at 250mK and 4K, coupled to digital room temperature backend electronics described here. The digital electronics perform the real time functionality with DSP algorithms implemented in firmware. A soft embedded processor provides all of the slow housekeeping control and communications. Each board in the system synthesizes multi-frequency combs of 8 to 32 carriers in the MHz band to bias the detectors. After the carriers have been modulated with the sky-signal by the…
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
