2023
4D Joint Harmonic Retrieval and Model Order Estimation with Convolutional Neural Networks
Harmonic retrieval is essential in radio channel sounding, estimation, and modeling. In our previous work, we proposed a CNN-based approach combined with additional steps on the likelihood function. This paper extends the approach to perform joint 4D harmonic retrieval by utilizing the samples from …
A Framework for Developing and Evaluating Algorithms for Estimating Multipath Propagation Parameters from Channel Sounder Measurements
A framework is proposed for developing and evaluating algorithms for extracting multipath propagation components (MPCs) from measurements collected by channel sounders at millimeter-wave frequencies. Sounders equipped with an omni-directional transmitter and a receiver with a uniform planar array …
Dynamic delay-dispersive UWB-Radar Targets: Modeling and Estimation
This publication proposes a parametric data model and a gradient-based maximum likelihood estimator suitable for the description of delay-dispersive responses of multiple dynamic ultrawideband (UWB)-radar targets. The target responses are estimated jointly with the global target parameters range and …
High-Resolution Parameter Estimation for Wideband Radio Channel Sounding
Multidimensional channel sounding measures the geometrical structure of mobile radio propagation. The parameters of a multipath data model in terms of directions, time-of-flight, and Doppler shift are estimated from observations in frequency, time, and space. A maximum likelihood estimation …
Misspecification under the Narrowband Assumption: A Cramer--Rao Bound Perspective
To efficiently extract estimates about the propagation behavior of electromagnetic waves in a radio environment it is common to invoke the narrowband-assumption. It essentially states that the relative bandwidth of the measurement system is so low that the frequency response of a single propagation …
Time Variant Directional Multi-Link Channel Sounding and Estimation for V2X
We present our new scalable multi-channel and multi-node sounder, the ILMSound G3. It is configurable in terms of the number of switched Tx and parallel Rx nodes. The basic structures of the Tx and Rx nodes are given with consideration of the measurement system requirements. The ILMSound G3 is …