Yonghui Li

A Tchebycheff-Guided MARL-Based Channel Access in IEEE 802.11ah Networks

Tian Qiu, Litianyi Zhang, Peng Cheng, Shenghong Li et autres

This paper addresses the challenge of balancing per-station throughput and overall fairness for IEEE 802.11ah uplink scenarios with heterogeneous link conditions and shared-medium contention. We propose a learning-based MAC-layer enhancement that replaces the backoff mechanism with a policy-driven transmission decision, enabling explicit …

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Pulse Shaping Filter Design for Zak-OTFS

Kecheng Zhang, Weijie Yuan, Yonghui Li

The Zak-transform-based Orthogonal Time Frequency Space (Zak-OTFS), offers a robust framework for high-mobility communications by simplifying the input-output (I/O) relation to a twisted convolution. While this structure theoretically enables accurate channel estimation by sampling the response from one pilot symbol, practical implementation …

Pulse Shaping Filter Design for Zak-OTFS

Kecheng Zhang, Weijie Yuan, Yonghui Li

The Zak-transform-based Orthogonal Time Frequency Space (Zak-OTFS), offers a robust framework for high-mobility communications by simplifying the input-output (I/O) relation to a twisted convolution. While this structure theoretically enables accurate channel estimation by sampling the response from one pilot symbol, practical implementation …

Toward Standardizing OTFS: A Candidate Waveform for Next-Generation Wireless Networks

Mingcheng Nie, Ruoxi Chong, Shuangyang Li, Arman Farhang et autres

The standardization of the sixth-generation (6G) has recently commenced to address the rapidly growing demands for enhanced wireless network services. Nevertheless, existing wireless systems, particularly at the physical layer waveform level, remain inadequate for achieving the ambitious key performance indicators (KPIs) envisioned …

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A Novel Cross-Domain Channel Estimation Scheme for OFDM

Mingcheng Nie, Ruoxi Chong, Shuangyang Li, Weijie Yuan et autres

In this paper, we propose a novel cross-domain channel estimation (CDCE) algorithm for orthogonal frequency division multiplexing (OFDM) systems, leveraging the unique characteristics of the delay-Doppler (DD) domain channel. Specifically, the proposed algorithm transforms the time-frequency (TF) domain pilot sequence of OFDM …

Towards Standardizing OTFS: A Candidate Waveform for Next-Generation Wireless Networks

Mingcheng Nie, Ruoxi Chong, Shuangyang Li, Arman Farhang et autres

The standardization of the sixth-generation (6G) has recently commenced to address the rapidly growing demands for enhanced wireless network services. Nevertheless, existing wireless systems, particularly at the physical layer waveform level, remain inadequate for achieving the ambitious key performance indicators (KPIs) envisioned …

Towards Standardizing OTFS: A Candidate Waveform for Next-Generation Wireless Networks

Mingcheng Nie, Ruoxi Chong, Shuangyang Li, Arman Farhang et autres

The standardization of the sixth-generation (6G) has recently commenced to address the rapidly growing demands for enhanced wireless network services. Nevertheless, existing wireless systems, particularly at the physical layer waveform level, remain inadequate for achieving the ambitious key performance indicators (KPIs) envisioned …

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A Novel Cross-Domain Channel Estimation Scheme for OFDM

Mingcheng Nie, Ruoxi Chong, Shuangyang Li, Weijie Yuan et autres

In this paper, we propose a novel cross-domain channel estimation (CDCE) algorithm for orthogonal frequency division multiplexing (OFDM) systems, leveraging the unique characteristics of the delay-Doppler (DD) domain channel. Specifically, the proposed algorithm transforms the time-frequency (TF) domain pilot sequence of OFDM …

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Optimal Linear MAP Decoding for Non-Binary Convolutional Codes

Zhengtong Li, Chentao Yue, Branka Vucetic, Yonghui Li

Non-binary convolutional codes (NBCCs) offer significant performance advantages in modern communication systems, but their optimal decoding using classical maximum a posteriori probability (MAP) algorithms is computationally intensive. This paper proposes a low-complexity linear MAP (LMAP) decoding method for rate-1/2 NBCCs. By representing …

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Design of Distributed Network-Channel Codes for Wireless Sensor Networks

ザカン タン, Gia Khanh Tran, Kun Pang, Zihuai Lin et autres