04 / Research Project

Integrated Sensing & Communication

One aperture, two functions. Antennas that simultaneously connect and perceive.

In 5G and earlier systems, sensing and communication are separated by design: radar systems occupy dedicated spectrum and dedicated hardware, base stations handle only data. Integrated Sensing and Communication (ISAC) collapses this separation. A single aperture, on a single frequency band, simultaneously delivers data to users and senses the surrounding environment—detecting objects, tracking motion, mapping spaces. For 6G, ISAC is a design requirement: the same physical-layer infrastructure that delivers connectivity must also build situational awareness of the environment it serves.

01

The Dual-Function Waveform Challenge

A waveform optimized for communication—high spectral efficiency, complex modulation, irregular timing—is not optimized for sensing, which requires high range resolution, clean autocorrelation sidelobe structure, and predictable timing references. ISAC demands waveforms that serve both objectives simultaneously. Our research maps the Pareto frontier of this communication-sensing tradeoff and develops adaptive waveform selection algorithms that shift the operating point based on real-time demands.

02

Joint Signal Processing

Traditional radar and communication receivers are designed independently, with separate DSP chains. ISAC demands a joint receiver that estimates channel state (for communication decoding) and target parameters (range, velocity, angle) from the same received waveform. We develop neural receiver architectures that perform both functions with shared computation, reducing the hardware overhead that a paired radar-communication system would require.

03

Environment Mapping & Beam Prediction

ISAC opens a new capability: the base station as a persistent environmental sensor. Accumulated ISAC sensing returns, processed over time, build a dynamic map of the service area—object locations, movement patterns, blockage geometry. We explore how such maps feed back into beam management, enabling proactive link adaptation and handover prediction before a link actually degrades.

Key Concepts
Radar Cross Section (RCS)A measure of how detectable an object is by radar—the equivalent area that would scatter the same power as the actual target.
Ambiguity FunctionA two-dimensional function describing a waveform's joint range and Doppler resolution; the fundamental tool for assessing sensing waveform quality.
Spectral EfficiencyA measure of how efficiently a limited frequency band is utilized, quantified in bits per second per hertz (bps/Hz).
ClutterUnwanted radar returns from static environment features (buildings, vegetation) that mask returns from targets of interest.
References
  1. [1]Liu, F., et al. (2022). Integrated Sensing and Communications: Toward Dual-Functional Wireless Networks for 6G and Beyond. IEEE Journal on Selected Areas in Communications, 40(6), 1728–1767.
  2. [2]Zhang, J. A., et al. (2021). An Overview of Signal Processing Techniques for Joint Communication and Radar Sensing. IEEE Journal of Selected Topics in Signal Processing, 15(6), 1295–1315.
  3. [3]Sturm, C., & Wiesbeck, W. (2011). Waveform Design and Signal Processing Aspects for Fusion of Wireless Communications and Radar Sensing. Proceedings of the IEEE, 99(7), 1236–1259.
  4. [4]3GPP TR 22.837. (2023). Study on Integrated Sensing and Communication.