Abstract
In this letter, we present a novel approach to realizing photonics-assisted compressive sensing (CS) with
the technique of microwave photonic
fi
ltering. In the proposed system, an input spectrally sparse signal
to be captured and a random sequence are modulated on an optical carrier via two Mach
–
Zehnder
modulators (MZMs). Therefore, the mixing process (the signal to be captured mixing with the random
sequence) is realized in the optical domain. The mixed optical signal then propagates through a length of
dispersive
fi
ber. As the double-sideband modulation in a dispersive optical link leads to a frequency-
dependent power fading, low-pass
fi
ltering required in the CS is then realized. A proof-of-concept ex-
periment for compressive sampling and recovery of a signal containing three tones at 310 MHz, 1 GHz
and 2 GHz with a compression factor up to 10 is successfully demonstrated. More simulation results are
also presented to recover signals within wider bandwidth and with more frequency components.
Original language | English |
---|---|
Journal | Optics Communications |
Volume | 338 |
Pages (from-to) | 428-432 |
ISSN | 0030-4018 |
DOIs | |
Publication status | Published - 2015 |
Keywords
- Analog-to-digital converter (ADC)
- Compressive sensing (CS)
- Microwave photonic filter