Frequency multiplexing

Definition: Distinguishing different channels by modulating the light source at non-overlapping frequencies. In fNIRS devices, each light emitter can be codified with a specific frequency modulation through frequency multiplexing, which allows simultaneous detection of all sources at any given detector. The demultiplexing would then be employed to measure the amount of signal detected coming from each source.

Alternative definition:

Synonym: NaN

References: DOI: 10.1117/1.nph.8.1.012101

Related terms: Time multiplexing