A5057950808- PAPR reduction in OFDM
- Advanced Wireless Communication Technologies
- Optical Wireless Communication Technologies
- Advanced Wireless Communication Techniques
- Optical Network Technologies
- Advanced Fiber Optic Sensors
- Advanced Photonic Communication Systems
- Advanced Electrical Measurement Techniques
- Analog and Mixed-Signal Circuit Design
- Wireless Communication Networks Research
- Blind Source Separation Techniques
University College Dublin
2020-2023
Trinity College Dublin
2023
5G communication systems and beyond are envisioned to support an extremely diverse set of use cases with different performance requirements. These requirements necessitate the numerologies for increased flexibility. Non-orthogonal multiple access (NOMA) can potentially attain this flexibility by superimposing user signals while offering improved spectral efficiency (SE). However, users have symbol durations. When combined NOMA, changes nature interference impose on each other. This paper...
6G wireless networks will require the flexibility to accommodate an extremely diverse set of service types. Accommodating different quality (QoS) requirements for these types necessitates use mixed numerologies, where services using subcarrier spacings or symbol durations coexist in same frequency band. Non-orthogonal multiple access (NOMA) techniques can potentially be used users with numerologies while also gaining performance benefits associated NOMA. To achieve full a numerology NOMA...
Orthogonal time frequency space (OTFS) modulation has recently emerged as a potential 6G candidate waveform which provides improved performance in high-mobility scenarios. In this paper we investigate the combination of OTFS with non-orthogonal multiple access (NOMA). Existing equalization and detection methods for OTFS-NOMA, such minimum-mean-squared error successive interference cancellation (MMSE-SIC), suffer from poor performance. Additionally, existing iterative single-user based on...
Orthogonal time frequency space (OTFS) modulation has recently emerged as a potential 6G candidate waveform which provides improved performance in high-mobility scenarios. In this paper we investigate the combination of OTFS with non-orthogonal multiple access (NOMA). Existing equalization and detection methods for OTFS-NOMA, such minimum-mean-squared error successive interference cancellation (MMSE-SIC), suffer from poor high complexity. Motivated by this, propose low-complexity method...
The advent of mixed-numerology multi-carrier (MN-MC) techniques adds flexibilities in supporting heterogeneous services fifth generation (5G) communication systems and beyond. However, the coexistence mixed numerologies destroys orthogonality principle defined for single-numerology orthogonal frequency division multiplexing (SN-OFDM) with overlapping subcarriers uniform subcarrier spacing. Consequently, loss leads to inter-numerology interference (INI), which complicates signal impedes...
Orthogonal time frequency space (OTFS) is a promising candidate waveform for the next generation wireless communication systems. OTFS places data in delay-Doppler (DD) domain, which simplifies channel estimation high-mobility scenarios. However, due to 2-D convolution effect of time-varying DD equalization still challenge OTFS. Existing equalizers are either highly complex or they do not consider intercarrier interference present Hence, this paper, we propose novel two-stage detection...
Orthogonal time frequency space (OTFS) modulation has recently emerged as a potential 6G candidate waveform which provides improved performance in high-mobility scenarios. In this paper we investigate the combination of OTFS with non-orthogonal multiple access (NOMA). Existing equalization and detection methods for OTFS-NOMA, such minimum-mean-squared error successive interference cancellation (MMSE-SIC), suffer from poor performance. Additionally, existing iterative single-user based on...
Orthogonal time frequency space (OTFS) is a promising candidate waveform for the next generation wireless communication systems. OTFS places data in delay-Doppler (DD) domain, which simplifies channel estimation highmobility scenarios. However, due to 2-D convolution effect of time-varying DD equalization still challenge OTFS. Existing equalizers are either highly complex or they do not consider intercarrier interference present high-mobility Hence, this paper, we propose novel two-stage...
5G communication systems and beyond are envisioned to support an extremely diverse set of use cases with different performance requirements. These requirements necessitate the numerologies for increased flexibility. Non-orthogonal multiple access (NOMA) can potentially attain this flexibility by superimposing user signals while offering improved spectral efficiency (SE). However, users have symbol durations. When combined NOMA, changes nature interference impose on each other. This paper...
Orthogonal time frequency space (OTFS) modulation has recently emerged as a potential 6G candidate waveform which provides improved performance in high-mobility scenarios. In this paper we investigate the combination of OTFS with non-orthogonal multiple access (NOMA). Existing equalization and detection methods for OTFS-NOMA, such minimum-mean-squared error successive interference cancellation (MMSE-SIC), suffer from poor performance. Additionally, existing iterative single-user based on...
6G wireless networks will require the flexibility to accommodate an extremely diverse set of service types. This necessitates use mixed numerologies different quality (QoS) requirements. Non-orthogonal multiple access (NOMA) techniques can potentially be used users with while also gaining performance benefits associated NOMA. To achieve full a numerology NOMA (MN-NOMA) system, resource allocation among is paramount. However, coexistence changes nature interference that each user experiences....