2025
Benchmarking CFAR and CNN-Based Peak Detection Algorithms in ISAC Under Hardware Impairments
Peak detection is a fundamental task in radar and has therefore been studied extensively in radar literature. However, Integrated Sensing and Communication (ISAC) systems for sixth generation (6 G) cellular networks need to perform peak detection under hardware impairments and constraints imposed by …
Cubic B-Splines for Hardware-Accelerated Antenna Beampattern Interpolation
For applications that require fast evaluations of an antenna’s beampattern, we propose a computationally efficient interpolation technique based on cubic B-Splines. We expand the pattern into a sum of finite-support polynomial functions that allow a fixed runtime evaluation irrespective of the …
Dual-Band Sensing for Passive Target Surveillance in ISAC Systems
A ubiquitous and high-performance sensing service is required in the next generation of wireless communication systems. The legacy Sub-6GHz bands can provide a larger sensing range, but the available bandwidth limits the resolution. In contrast, the millimeter-wave (mmWave) frequencies enhance the …
Elowen: MIMO Channel Sounding and Characterization in an Urban Macro Cell
The measurement campaign was performed in Cologne (Germany) using a RUSK MIMO channel sounder operating at 2.53 GHz. The fixed transmitter has been mounted on a roof top of an approx. 30m high building whereas the mobile receiver has been set up in a car. The application of high resolution parameter …
Estimating Angular Diffuse Components and Model Misspecification in MIMO Channel Sounding
Parameter estimation for MIMO channel sounding data aims at accurately describing channel measurements with physically realistic and interpretable parameters. The performance of model-based approaches, e.g. maximum likelihood, is determined by the accuracy of the imposed signal model. For channel …
Experimental Performance Validation of Fisher Information-Optimized Multicarrier Waveforms for Sub-THz Channel Sounding
This paper describes an experimental performance validation of Fisher information-based waveform designs for channel sounding and high-resolution propagation parameter estimation. These waveform designs require prior knowledge about the parameters which can be estimated from a preceding measurement. …
Joint Delay-Doppler Estimation Using OFDMA Payloads for Integrated Communications and Sensing
The use of future communication systems for sensing offers the potential for a number of new applications. In this paper, we show that leveraging user data payloads in multinode Orthogonal Frequency Division Multiple Access (OFDMA) networks for estimating target delay and Doppler-shift parameters …
Measurement-Based Evaluation of CNN-Based Detection and Estimation for ISAC Systems
In wireless sensing applications, such as Integrated Sensing and Communication (ISAC), one of the first crucial signal processing steps is the detection and estimation targets from a channel estimate. Effective algorithms in this context must be robust across a broad Signal-to-Noise Ratio (SNR) …
Metrology of Multicarrier-Based Delay-Doppler Channel Sounding for sub-THz Frequencies
Developing channel models typically requires aggregating channel measurements and the corresponding extracted propagation parameters from different research institutions to form a sufficiently large data basis. However, uncertainties arising from limitations of the sounding hardware and algorithms …
Model-Based Joint Delay-Doppler Estimation for ICAS with Sparse OFDM Resources
Studies have shown that OFDM waveforms are promising candidates for dual functionality radar and communication networks. However, when the transmitted OFDM frame contains sparsely and arbitrarily allocated resources, periodogram based target estimation suffers from high side-lobes and poor …
Multi-Bistatic Coordinated Multipoint JCAS: Exploring the Synchronization Requirements
This paper investigates synchronization accuracy and derived synchronization requirements for multi-bistatic Joint Communication and Sensing (JCAS) systems, with a focus on Coordinated MultiPoint (CoMP) architectures. JCAS technology, especially in Vehicle-to-everything (V2X) networks, can enhance …
Newtonized Orthogonal Matching Pursuit for High-Resolution Target Detection in Sparse OFDM ISAC Systems
Integrated Sensing and Communication (ISAC) is a technology paradigm that combines sensing capabilities with communication functionalities in a single device or system. In vehicle-to-everything (V2X) sidelink, ISAC can provide enhanced safety by allowing vehicles to not only communicate with one …
Real-Time 141 GHz JCAS Channel Sounder: Near-Field Switched Beamforming, Carrier Multiplexing, and Context Awareness
We have developed a real-time 141 GHz joint communications and sensing (JCAS) channel sounder, with focus on this article on 3-D near-field imaging (less than 50 cm range) for applications such as finger recognition. To achieve this, we integrated phased-array antennas into the channel sounder—to …
Wireless Propagation Parameter Estimation with Convolutional Neural Networks
Wireless channel propagation parameter estimation forms the foundation of channel sounding, estimation, modeling, and sensing. This paper introduces a deep learning approach for joint delay and Doppler estimation from frequency and time samples of a radio channel transfer function. Our work …