Crest factor optimization of multi-tone signals generated for low-temperature sensor readout

Abstract

Microwave kinetic inductance detectors (MKID) are a growing technology of cryogenic detectors and have a great potential in radio-astronomy and cosmic microwave background (CMB) characterization. A review of the general readout performance requirements for experiments requiring the multiplexing of large arrays (~10.000 pixels) of such cryogenic detectors is presented. The focus is on the crest factor optimization process for proper excitation and readout of these large arrays of detectors. It is shown an algorithm to optimize the phase generation of the carriers to obtain a low crest factor, favoring the dynamic range usage of the electronic chain.