16 papers
Joint PAPR and OOBE Reduction for AFDM via Chirp Parameter Tuning
Vincent Savaux, Hyeon Seok Rou, Zeping Sui +2
This paper addresses the joint reduction of the peak-to-average power ratio (PAPR) and out-of-band emissions (OOBE) in affine frequency division multiplexing (AFDM) systems by sele…
SCMA Inspired Sparse Vector Coding: An Enhanced URLLC Transmission Scheme
Zhen-Ming Huang, Zilong Liu, Leila Musavian +1
Sparsity is inherently exploited in sparse code multiple access (SCMA) and sparse vector coding (SVC), yet the interaction between these two has not been explored before. It is int…
Robust SCMA Codebook Design: A Hardware-Aware Autoencoder Approach
Zihao Liu, Zilong Liu, Leila Musavian
Sparse code multiple access (SCMA) is a promising code-domain non-orthogonal multiple access scheme which is transmitted over orthogonal frequency division multiplexing (OFDM) to e…
Towards Standardizing Affine Frequency Division Multiplexing (AFDM) for Future Wireless Networks
Qu Luo, Lixia Xiao, Pei Xiao +6
Affine frequency division multiplexing~(AFDM) has emerged as a compelling waveform candidate for future wireless networks, owing to its strong resilience to doubly selective channe…
One-hot Coding-based URA with RFFI-Enabled Message Authentication
Wenbo Fan, Zeping Sui, Yuhei Takahashi +3
Unsourced random access (URA) has emerged as a promising paradigm for enabling massive connectivity in Internet-of-Things (IoT) networks. However, since URA transmissions do not co…
A Novel Low-Complexity Dual-Domain Expectation Propagation Detection Aided AFDM for Future Communications
Qin Yi, Ping Yang, Zilong Liu +3
This paper presents a dual-domain low-complexity expectation propagation (EP) detection framework for affine frequency division multiplexing (AFDM) systems. By analyzing the struct…
AFDM: Evolving OFDM Towards 6G+
Hyeon Seok Rou, Vincent Savaux, Zeping Sui +2
As sixth generation (6G) standardization accelerates, there is growing consensus in favor of evolutionary waveforms that add new capabilities while preserving compatibility with th…
OTFS-based Integrated Positioning and Communication Systems with Low-Resolution ADCs
Yueyi Yang, Zeping Sui, Zilong Liu +1
This paper proposes a two-phase orthogonal time frequency space (OTFS)-based integrated positioning and communication (IPAC) framework under realistic low-resolution analog-to-digi…
MIMO-AFDM Outperforms MIMO-OFDM in the Face of Hardware Impairments
Zeping Sui, Zilong Liu, Leila Musavian +3
The impact of both multiplicative and additive hardware impairments (HWIs) on multiple-input multiple-output affine frequency division multiplexing (MIMO-AFDM) systems is investiga…
On the Robustness of AFDM and OTFS Against Passive Eavesdroppers
Vincent Savaux, Hyeon Seok Rou, Zeping Sui +2
We investigate the robustness of affine frequency division multiplexing (AFDM) and orthogonal time frequency space (OTFS) waveforms against passive eavesdroppers performing brute-f…
Optimal Real-time Communication in 6G Ultra-Massive V2X Mobile Networks
He Huang, Zilong Liu, Zeping Sui +4
This paper introduces a novel cooperative vehicular communication algorithm tailored for future 6G ultra-massive vehicle-to-everything (V2X) networks leveraging integrated space-ai…
Error Rate Analysis and Low-Complexity Receiver Design for Zero-Padded AFDM
Qin Yi, Zeping Sui, Zilong Liu
This paper studies the error rate performance and low-complexity receiver design for zero-padded affine frequency division multiplexing (ZP-AFDM) systems. By exploiting the unique…
Energy Detection over Composite Shadowed Fading Channels with Inverse Gaussian Distribution in Ultra mMTC Networks
He Huang, Zeping Sui, Zilong Liu +4
This paper investigates the characteristics of energy detection (ED) over composite - shadowed fading channels in ultra machine-type communication (mMTC) networks. We have de…
Non-Orthogonal Affine Frequency Division Multiplexing for Spectrally Efficient High-Mobility Communications
Qin Yi, Zilong Liu, Leila Musavian +1
This paper proposes a novel non-orthogonal affine frequency division multiplexing (nAFDM) waveform for reliable high-mobility communications with enhanced spectral efficiency (SE).…
Matched Filtering-Based Channel Estimation for AFDM Systems in Doubly Selective Channels
Xiangjun Li, Zilong Liu, Zhengchun Zhou +1
Affine frequency division multiplexing (AFDM) has recently emerged as an excellent backward-compatible 6G waveform. In this paper, we study matched filtering (MF) assisted channel…
Generalized Spatial Modulation Aided Affine Frequency Division Multiplexing
Zeping Sui, Zilong Liu, Leila Musavian +2
Generalized spatial modulation-aided affine frequency division multiplexing (GSM-AFDM) is conceived for reliable multiple-input multiple-output (MIMO) communications over doubly se…