ISACSense Super-Resolution Signal Processing & 4D Radar Imaging

ISACSense formalizes digital signal processing pipelines for integrated sensing and communication, 2D-FFT Range-Doppler matrix generation, MUSIC sub-space super-resolution, and CFAR clutter rejection.

ISACSense Super-Resolution Digital Signal Processing Stack

ISAC Core: Sense Core — 2D-FFT Range-Doppler & MUSIC AoA

6G ISAC Nodes & Beamforming Subsystems

2D-FFT Range-Doppler Pipeline
MUSIC Super-Resolution Estimator
OS-CFAR Clutter Suppressor
Micro-Doppler Gait Classifier
4D Point Cloud Formatter

Architectural Layers & Waveform Pipelines

Layer 1: Dual-Functional Waveform & Baseband (OTFS / OFDM-Radar / Fractional Fourier Transform / Ambiguity Function): Orthogonal Time Frequency Space (OTFS) modulation and fractional chirp synthesis achieving zero inter-carrier interference under severe Doppler spreads.
Layer 2: Massive MIMO & Beamforming Frontends (140 GHz D-Band / True-Time-Delay (TTD) / Hybrid Analog-Digital Beamforming): Sub-THz active phased array architectures with true-time-delay beam-squint mitigation, simultaneous communication data beams and pencil radar tracking lobes.
Layer 3: Radar Signal Processing & 4D Point Cloud (2D-FFT Range-Doppler / MUSIC AoA / CFAR Detection / Micro-Doppler Extraction): Sub-decimeter range and velocity resolution, constant false-alarm rate (CFAR) detection, and micro-Doppler biomechanical gait and drone propeller classification.
Layer 4: Network Sensing Orchestration & 3GPP Rel-19 (3GPP Rel-19 ISAC Core / Sensing Function (SF) / Reconfigurable Intelligent Surfaces (RIS)): Cell-free collaborative radar networks, dynamic time-frequency resource allocation balancing communication SLA against radar revisit time.

Sensing Telemetry & Benchmarks: <5 cm (Range Resolution) | 0.1 m/s (Velocity Precision) | <10 ms (Radar Frame Latency) | 3GPP Rel-19 (Global Standard)

Range-Doppler Estimation & Super-Resolution in ISACSense

Extracting crisp 4D point clouds from noisy cellular echo reflections requires sophisticated mathematical transformation pipelines. ISACSense defines hardware-accelerated algorithms for real-time 2D-FFT spectrum estimation, angle-of-arrival super-resolution, and dynamic clutter suppression.

Core Engineering Areas

Two-Dimensional FFT Range-Doppler Matrix Processing — Transforming raw time-domain IQ samples into range-velocity matrices using cascaded fast Fourier transforms with low sidelobe leakage.
Super-Resolution MUSIC and ESPRIT Direction-Finding — Sub-space spatial spectrum estimation resolving multiple targets situated within the same conventional Rayleigh diffraction beamwidth.
Constant False Alarm Rate (CFAR) Clutter Suppression — Adaptive thresholding algorithms maintaining steady false-alarm rates when transitioning between urban buildings, foliage, and rain clutter.