Related Experiment Video
Updated: Jul 8, 2026
12:19
Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
Published on: April 4, 2017
8.8K
Photonic-aided Doppler-robust ISAC system based on index modulation and chirp multiplexing
Optics Express
|September 23, 2025
Summary
This study introduces a photonic-aided integrated sensing and communication (ISAC) system for low-Earth-orbit satellite networks. The novel system effectively handles Doppler shifts in high-mobility scenarios, enabling robust sensing and communication.
Area of Science:
- Photonics
- Satellite Communications
- Radar Systems
Background:
- Integrated sensing and communication (ISAC) is crucial for low-Earth-orbit (LEO) satellite networks.
- Existing ISAC systems struggle with Doppler frequency shifts in high-mobility environments.
Purpose of the Study:
- To propose and demonstrate a photonic-aided ISAC system robust to Doppler frequency shifts.
- To address the limitations of current ISAC technologies in dynamic LEO satellite networks.
Main Methods:
- Designed and generated a chirp-multiplexed and index modulated linearly frequency modulated (IM-LFM) waveform using a dual polarization up-converter.
- Implemented a photonic dual polarization radar receiver for dual channel de-chirp processing.
- Utilized down conversion and FFT for communication reception and demodulation.
Main Results:
- Experimentally generated and demonstrated a 16.3-17.826 GHz IM-LFM waveform for ISAC.
- Achieved a sensing range resolution better than 0.146 meters with >86% probability.
- Attained a communication rate of 29.99 Mbps with a 500 kHz Doppler frequency shift.
Conclusions:
- The proposed photonic-aided ISAC system demonstrates high performance in sensing and communication under significant Doppler shifts.
- This technology is well-suited for high-mobility ISAC applications in LEO satellite networks.
- The system overcomes previous challenges, paving the way for advanced LEO satellite capabilities.
Related Concept Videos
00:56Doppler Effect - I
The Doppler effect and Doppler shift were named after the Austrian physicist and mathematician Christian Johann Doppler in 1842, who conducted experiments with both moving sources and moving observers. Consider an observer standing on a street corner, observing an ambulance with a siren sound passing by at a constant speed. The observer experiences two characteristic changes in the sound of the siren. Initially, the sound increases in loudness as the ambulance approaches and decreases in...
01:05Doppler Effect - II
The Doppler effect has several practical, real-world applications. For instance, meteorologists use Doppler radars to interpret weather events based on the Doppler effect. Typically, a transmitter emits radio waves at a specific frequency toward the sky from a weather station. The radio waves bounce off the clouds and precipitation and travel back to the weather station. The radio frequency of the waves reflected back to the station appears to decrease if the clouds or precipitation are moving...
01:17Bandpass Sampling
In signal processing, bandpass sampling is an effective technique for sampling signals that have most of their energy concentrated within a narrow frequency band. This type of signal is known as a bandpass signal. The key principle of bandpass sampling involves sampling the signal at a rate that is greater than twice the signal's bandwidth to prevent aliasing.
A bandpass signal has a spectrum with a lower frequency limit, denoted as ω1, and an upper frequency limit, denoted as ω2. The spectrum...
A bandpass signal has a spectrum with a lower frequency limit, denoted as ω1, and an upper frequency limit, denoted as ω2. The spectrum...