PhD - Leuven | More than two weeks ago
Motivated by the new emerging applications such as augmented reality, virtual reality, point to point for backhaul and datacenter or point to multipoint broadband access, the future wireless connectivity landscape of 6G and beyond will feature a wide a range of applications with very-high-throughput requirements. Such stringent requirements make the radio access design very challenging and some fundamental performance / complexity tradeoffs must be made. The move to mm-wave bands (100-300) GHz to achieve wired-like speeds in the order of 100 Gbps requires revisiting the radio access design beyond the state-of-the-art wireless technologies such as 5G networks and WLAN standards (802.11ax/ay).
The transmission in mm-wave bands is challenging because of (i) the large propagation loss, (ii) the frequency selectivity with a sparse multipath channel, (iii) very high sensitivity to Doppler shift/spread even with low mobility, (iv) challenging high-frequency analog front-end design and (v) digital signal processing with extremely large signal bandwidth. These challenges are by nature different from those in 5G, motivating the need for novel radio access designs.
In this PhD, the candidate will investigate novel radio waveforms and the underlying signal processing to outperform state-of-the-art air interfaces. The proposed designs are expected to achieve (i) higher robustness to changes in the end-to-end radio access and hardware impairments, (ii) low-complexity equalization, (iii) higher spectral efficiency and (iv) higher energy efficiency of both the user terminal as well as the base station. The waveform design can result in different classes of waveforms adapted to the dominant propagation channels; however, the design should be practical to be deployed and tested in realistic environment. In particular, the proposed waveforms should involve complexity-efficient channel estimation and beam-tracking as well as simple digital beamforming.
Thanks to the multidisciplinary nature of this PhD research, the successful PhD candidate will build on IMEC's experience of high-throughput mm-wave communication systems and identify the key research areas to investigate based on state-of-the-art literature and assessment of the expected link and system power consumption in future systems. Novel waveforms, signal processing blocks and system architectures will be proposed and simulated in order to evaluate the system performance and optimize the different components. This research may be combined with experiments and measurement on communication testbeds.
Required background: wireless communications, digital signal processing
Type of work: 10% literature/theory, 80% modelling/simulation, 10% design/experimental
Supervisor: Heidi Steendam
Daily advisor: Mamoun Guenach, Andre Bourdoux
The reference code for this position is 2022-056. Mention this reference code on your application form.