A5051515166- Sparse and Compressive Sensing Techniques
- ECG Monitoring and Analysis
- Blind Source Separation Techniques
- Wireless Communication Networks Research
- PAPR reduction in OFDM
- Advanced Wireless Communication Techniques
- graph theory and CDMA systems
- Direction-of-Arrival Estimation Techniques
- Full-Duplex Wireless Communications
- Telecommunications and Broadcasting Technologies
- Advanced MIMO Systems Optimization
- Radar Systems and Signal Processing
Huawei Technologies (France)
2023-2024
EURECOM
2023
Affine Frequency Division Multiplexing (AFDM), a new chirp-based multicarrier waveform for high mobility communications, is introduced here. AFDM based on discrete affine Fourier transform (DAFT), generalization of transform, which characterized by two parameters that can be adapted the Doppler spread doubly dispersive channels. First, we derive explicit input-output relation in DAFT domain showing effect relation. Second, show how underlying have to set so resulting impulse response conveys...
Integrated sensing and communications (ISAC) is regarded as a key technology in next-generation (6G) mobile communication systems. Affine frequency division multiplexing (AFDM) recently proposed waveform that achieves optimal diversity gain high mobility scenarios has appealing properties high-frequency communication. In this letter, we present an AFDM-based ISAC system. We first show order to identify all delay Doppler components associated with the propagation medium, either full AFDM...
Next-generation wireless networks are conceived to provide reliable and high-data-rate communication services for diverse scenarios, such as vehicle-to-vehicle, unmanned aerial vehicles, satellite networks. The severe Doppler spreads in the underlying time-varying channels induce destructive inter-carrier interference (ICI) extensively adopted orthogonal frequency division multiplexing (OFDM) waveform, leading performance degradation. This calls a new air interface design that can...
This paper addresses channel estimation for linear time-varying (LTV) wireless propagation links under the assumption of double sparsity i.e., in both delay and Doppler domains. Affine frequency division multiplexing (AFDM), a recently proposed waveform, is shown to be optimal (in terms pilot overhead) this problem. With mathematical analysis numerical results, minimal guard overhead needed achieving target mean squared error (MSE) while performing smallest when AFDM employed instead...
This paper addresses compressed sensing of linear time-varying (LTV) wireless propagation links under the assumption double sparsity i.e., in both delay and Doppler domains, using Affine Frequency Division Multiplexing (AFDM) measurements. By rigorously linking model to hierarchical paradigm, a algorithm with recovery guarantees is proposed for extracting delay-Doppler profiles LTV channels AFDM. Through mathematical analysis numerical results, superiority AFDM over other waveforms terms...