Seminar

Renewable energy is the key to achieving carbon neutrality. However, the large-scale integration of renewable energy sources poses tremendous challenges to the stable operation of modern power systems, as the systems become much more complex and are under lots of uncertainties. In particular, the grid interface of renewable generators (i.e., power electronics converters) generally have […]

Robot learning has witnessed significant progress in terms of generalization in the past few years. At the heart of such a generalization, the advancement of representation learning, such as image and text foundation models plays an important role. While these achievements are encouraging, most tasks conducted are relatively simple. In this talk, I will talk […]

The fusion of digital and real worlds in all dimensions will be the driving force for future sixth-generation (6G) wireless systems. Ubiquitous in-time and on-time communication services between humans, machines, robots, and their virtual counterparts are essential, and they expand from the ground to air, space, underground, and deep sea. 6G systems are not only data pipelines but also large-scale distributed computing systems […]

In the imminent era of 6G communications, unprecedented advancements will reshape our technological landscape and redefine the boundaries of the digital experience. 6G will enable two main features: ubiquitous communications via satellite-terrestrial integrated networks and intelligent connections. It is expected that 6G will significantly amplify network capabilities through advanced communication techniques such as AI methods […]

6G networks will bring forth a variety of novel enabling technologies such as integrated sensing and communications for perceptive mobile networks, quantum-enabled wireless networks, blockchainized mobile networks, and AI-native networks with intelligence-endogenous capabilities. The push from more advanced technological tools becoming available as well as the pull from society’s needs imply that there must be […]

In this talk, we will first review the model of linear time-varying (LTV) channels from the delay-Doppler (DD) domain, and discuss the LTV channels' DD domain impulse response. Next, we revisit the fundamentals of multi-carrier (MC) modulation, including the transmission strategy, the pulse design principles and the implementation methods. Then, we propose an impulse function […]

MIMO (multiple-input multiple-output) wireless communication has been an instrumental technology in fourth and fifth generation cellular communication systems. With more aggressive performance targets, the evolution of MIMO is essential to support more antennas,  accommodate larger bandwidths and exploit higher carrier frequencies.  In this talk, I will describe three areas of opportunity for the next generation […]

A highly competitive research environment with increasingly limited research funding has created a “Publish or Perish” attitude among scientists who are judged on the quantity rather than quality of their research articles. This presentation provides a brief overview of current trends and challenges in scientific publishing, some ethical considerations, how publishers and authors interact and […]

This presentation discusses various aspects of Compressed Spectrum Sensing (CSS) systems to address existing challenges and enhance practical implementation. The research contributes to some of the key techniques that enhance the performance of CSS systems in a practical framework, including refining spectrum recovery accuracy, optimising sampling pattern design, and improving reconstruction and machine learning algorithms. […]

Kerr optical frequency combs have emerged as one of the most versatile laser sources over the past decade. Through the nonlinear cavity soliton generation process within a Kerr resonator, a narrow linewidth coherent laser can be efficiently broadened into a wide-ranging comb, with all comb lines remaining mutually coherent. In the quest for miniaturization, the […]

The propagation of short and intense laser pulses in an optical fiber is known to be associated with a rich landscape of nonlinear propagation scenarios and multidimensional dynamical regimes. For example, in the coherent regime, soliton dynamics can lead to the generation of a broadband supercontinuum while in the incoherent regime noise amplification can lead […]

Computational imaging systems are based on the joint design of optics and associated image reconstruction algorithms. Of particular interest in recent years has been the development of end-to-end learned “Deep Optics” systems that use differentiable optical simulation in combination with backpropagation to simultaneously learn optical design and deep network post-processing for applications such as hyperspectral […]

On the occasion of the 50th anniversary of the prediction of optical solitons, I feel instructive to revisit the connections between ultrafast laser dynamics and solitary waves through a few milestones. The concepts of conventional (Hamiltonian) and dissipative solitons have been found to echo, oppose, or complement each other in the understanding of original dynamical […]

Spectral analysis is one of the most widely adopted techniques in various fields of scientific research, industrial production, and medical diagnostics. Yet, traditional spectrum detection techniques often require the setup of spectroscopic components, photodetector arrays, and mechanical positioning parts and so on. The relatively large size of those instrumentations may limit their applicability for small-scale […]

In this talk, the design dilemma of "What will be different between near-field communications (NFC) and far-field communications (FFC)?" is discussed from four perspectives. (1) From the channel modelling perspective, the differences between near-field and far-field channel models are discussed. (2) From the performance analysis perspective, analytical results for characterizing the degrees of freedom and […]

Estimating depth from images is a fundamental problem in many computer vision applications such as autonomous driving and robot navigation. Stereo matching is a solution to this task, which finds the matching correspondences between stereo image pairs and recovers the depth through triangulation. However, despite recent stereo matching networks achieving impressive performance given sufficient training […]

This work presents a novel algorithm for source localization based on Time Difference of Arrival (TDoA) measurements. We proposed a robust variant of the classic least-squares solution that improves the precision and robustness of the localization technique in the presence of heavily noisy measurements, including those with non-line-of-sight (NLOS) errors, which could be caused by […]

As the world moves towards the new era of post-covid and new world order brought about by innovative industries and digital economy, Web3.0 serves as the social fabric in everybody's daily life. Biography of the speaker: Prof. James Lei is Secretary General of Institute of Web3.0 Hong Kong, founder of Meta Metopia, New Paramount Technology, […]