Changheng Li

• Master of Engineering
• PhD Student at Delft University of Technology

Estimation of acoustic parameters is of great interest but very challenging in the multichannel microphone signal processing area. Existing methods either assume simple, but less realistic scenarios, or suffer from very high computational costs. In this work, we consider the more general scenario where multiple sources, late reverberation and noise...

The Hidden Subset Sum Problem (HSSP) involves reconstructing a hidden set from its multiple subset sums. Initially introduced as a cryptographic problem of accelerating the key generation process in some public key cryptosystems, it has recently found applications in artificial intelligence privacy-preserving research. Although the existing algorit...

Consensus control of multiagent systems arises in various robotic applications such as rendezvous and formation control. For example, to compute the control inputs of individual agents, the difference in the positions in aligned coordinate frames i.e., the pairwise displacements are typically measured. However, the local coordinate frames might be...

Consensus control of multiagent systems arises in various applications such as rendezvous and formation control. The input to these algorithms e.g., the (relative) positions of neighboring agents need to be measured using various sensors. Recent works aim to reconstruct these positions i.e., achieve localization using Euclidean distance measurement...

Estimation of the acoustic-scene related parameters such as relative transfer functions (RTFs) from source to microphones, source power spectral densities (PSDs) and PSDs of the late reverberation is essential and also challenging. Existing maximum likelihood estimators typically consider only subsets of these parameters and use each time frame sep...

Acoustic-scene-related parameters such as relative transfer functions (RTFs) and power spectral densities (PSDs) of the target source, late reverberation and ambient noise are essential for microphone array signal processing and are challenging to estimate. Existing methods typically only estimate a subset of the parameters by assuming the other pa...

For hearing-impaired listeners, both ambient noise suppression and directional source binaural cues preservation are required, such that a complete spatial awareness of the acoustic scene can be obtained. It was shown that the binaural multichannel Wiener filter (MWF) with partial noise preservation can achieve joint noise reduction and binaural cu...

We consider angular-domain channel estimation in massive MIMO systems using one-bit analog-to-digital converters (ADCs) with various thresholding schemes at the receivers. We first derive the performance bounds for estimating angular domain channel parameters, including the angles-of-arrival (AoA), angles-of-departure (AoD) and the associated path...

We consider range estimation and range-Doppler imaging using signed measurements of a radar system. Known time-varying thresholds are investigated for taking the signed measurements through one-bit sampling, and are compared with unknown dithering with known probability density function (pdf). The maximum likelihood (ML) approach is considered for...

The problem of model order selection from signed measurements obtained via 1-bit sampling is considered. The extension of the Bayesian information criterion (BIC) to the case of 1-bit sampling, referred to as 1bBIC, is proposed to determine the signal model order. A detailed analysis of and an application to sinusoidal signals are presented to demo...