研究

研究方向与论文列表,我的名字已加粗标出。

2025 – now

无限采样的鲁棒重建

模 ADC 把高动态范围信号折叠到有限区间内,但当阈值、采样密度或信号模型失配时,经典展开算法会失效。我设计在这些情况下依然可靠的重建方法:带物理修正的多输出网络(在混合基准上 NMSE 比最佳经典方法低 6 倍)、用于压缩无限采样的整数感知 OMP,以及面向雷达信号的系统性鲁棒性研究。

2024 – 2025

扩散模型与分子生成

一种分层扩散模型:先对骨架原子去噪、再生成取代基,EGNN 同时预测每个原子的角色,并在合适的噪声阶段启用分类器引导——在 QM9 上分子稳定性达 91.7%,收敛速度明显快于 EDM。

2025 – 2026

从零实现语言模型

自学 Stanford CS336:从零实现字节级 BPE 分词器与 Transformer 语言模型,复现 Chinchilla 式 scaling law 拟合,搭建 Common Crawl 过滤与去重流程,并在 Qwen2.5-Math-1.5B 上用 SFT/GRPO 把 MATH 准确率提升到 63%。

2018 – 2023

无线网络与联邦学习

在清华期间,用鞍点近似与大偏差理论分析无线联邦学习的时延,并研究面向边缘缓存的流行度预测;在华为期间,开发无线定位与基站参数校准算法,已在商用平台中替代人工路测。

论文与专利

2026

Robust Neural Reconstruction for Unlimited Sampling

Longwei Yang, Ali C. Gurbuz, Fauzia Ahmad

Submitted to IEEE Transactions on Signal Processing, 2026

TSPUnder review

Compressive Unlimited Sampling with Smooth-Coded Measurements and Integer-Aware OMP

Longwei Yang, Ali C. Gurbuz, Fauzia Ahmad

Submitted to IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP 2027), 2026

ICASSPUnder review

On the Robustness of Unlimited Sampling: An Empirical Study

Longwei Yang, Ali C. Gurbuz, Fauzia Ahmad

IEEE Radar Conference (RadarConf'26), 2026

RadarConf 2026论文

2025

Scaffold–Substituent Differentiated Diffusion for Hierarchical Molecule Generation

Longwei Yang, et al.

Manuscript, 2025

Manuscript

2021

Delay Analysis of Wireless Federated Learning Based on Saddle Point Approximation and Large Deviation Theory

Lintao Li, Longwei Yang, Xin Guo, Yuanming Shi, Haiming Wang, Wei Chen, Khaled B. Letaief

IEEE Journal on Selected Areas in Communications, 2021

JSAC 2021论文

Method and Apparatus for Controlling Content Caching in Edge Computing System

Wei Chen, Zhanyuan Xie, Zhiyuan Lin, Longwei Yang, Xin Guo, Haiming Wang

PCT Patent WO2021159304A1, published Aug 2021, 2021

Patent 2021论文

Saddle Point Approximation Based Delay Analysis for Wireless Federated Learning

Longwei Yang, Lintao Li, Xin Guo, Yuanming Shi, Haiming Wang, Wei Chen

IEEE International Conference on Communications (ICC), 2021

ICC 2021论文

2020

A Video Popularity Prediction Scheme with Attention-Based LSTM and Feature Embedding

Longwei Yang, Xin Guo, Haiming Wang, Wei Chen

IEEE Global Communications Conference (GLOBECOM), 2020

GLOBECOM 2020论文
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