Search Results for author: Tony Xiao Han

Found 15 papers, 2 papers with code

RF-Diffusion: Radio Signal Generation via Time-Frequency Diffusion

1 code implementation14 Apr 2024 Guoxuan Chi, Zheng Yang, Chenshu Wu, Jingao Xu, Yuchong Gao, Yunhao Liu, Tony Xiao Han

In this work, inspired by the stellar achievements of the diffusion model in CV and NLP, we adapt it to the RF domain and propose RF-Diffusion.

Time Series

Reshaping the ISAC Tradeoff Under OFDM Signaling: A Probabilistic Constellation Shaping Approach

no code implementations26 Dec 2023 Zhen Du, Fan Liu, Yifeng Xiong, Tony Xiao Han, Yonina C. Eldar, Shi Jin

To cope with this issue, we characterize the random AF of OFDM communication signals, and demonstrate that the AF variance is determined by the fourth-moment of the constellation amplitudes.

Fully-Passive versus Semi-Passive IRS-Enabled Sensing: SNR and CRB Comparison

no code implementations10 Nov 2023 Xianxin Song, Xinmin Li, Xiaoqi Qin, Jie Xu, Tony Xiao Han, Derrick Wing Kwan Ng

Accordingly, we analyze the sensing signal-to-noise ratio (SNR) performance for a target detection scenario and the estimation Cram\'er-Rao bound (CRB) performance for a target's direction-of-arrival (DoA) estimation scenario, in cases where the transmit beamforming at the BS and the reflective beamforming at the IRS are jointly optimized.

Probabilistic Constellation Shaping for OFDM-Based ISAC Signaling

no code implementations27 Oct 2023 Zhen Du, Fan Liu, Yifeng Xiong, Tony Xiao Han, Weijie Yuan, Yuanhao Cui, Changhua Yao, Yonina C. Eldar

Integrated Sensing and Communications (ISAC) has garnered significant attention as a promising technology for the upcoming sixth-generation wireless communication systems (6G).

An Overview on IEEE 802.11bf: WLAN Sensing

no code implementations20 Oct 2023 Rui Du, Haocheng Hua, Hailiang Xie, Xianxin Song, Zhonghao Lyu, Mengshi Hu, Narengerile, Yan Xin, Stephen McCann, Michael Montemurro, Tony Xiao Han, Jie Xu

To resolve this issue, a new Task Group (TG), namely IEEE 802. 11bf, has been established by the IEEE 802. 11 working group, with the objective of creating a new amendment to the WLAN standard to meet advanced sensing requirements while minimizing the effect on communications.

Quantization

Cramér-Rao Bound Minimization for IRS-Enabled Multiuser Integrated Sensing and Communication with Extended Target

no code implementations29 Oct 2022 Xianxin Song, Tony Xiao Han, Jie Xu

This paper investigates an intelligent reflecting surface (IRS) enabled multiuser integrated sensing and communication (ISAC) system, which consists of one multi-antenna base station (BS), one IRS, multiple single-antenna communication users (CUs), and one extended target at the non-line-of-sight (NLoS) region of the BS.

Fundamental Limits and Optimization of Multiband Sensing

no code implementations21 Jul 2022 Yubo Wan, An Liu, Rui Du, Tony Xiao Han

Then, a metric called the statistical resolution limit (SRL) that provides a resolution limit is employed to investigate the fundamental limits of delay resolution.

A Two-stage Multiband WiFi Sensing Scheme via Stochastic Particle-Based Variational Bayesian Inference

no code implementations21 Jul 2022 Zhixiang Hu, An Liu, Yubo Wan, Tony Xiao Han, MinJian Zhao

Multiband fusion enhances WiFi sensing by jointly utilizing signals from multiple non-contiguous frequency bands.

Bayesian Inference

Intelligent Reflecting Surface Enabled Sensing: Cramér-Rao Bound Optimization

no code implementations12 Jul 2022 Xianxin Song, Jie Xu, Fan Liu, Tony Xiao Han, Yonina C. Eldar

For the extended target case, we obtain the optimal transmit beamforming solution to minimize the CRB in closed form.

An Indoor Environment Sensing and Localization System via mmWave Phased Array

no code implementations7 Jun 2022 Yifei Sun, Jie Li, Tong Zhang, Rui Wang, Xiaohui Peng, Tony Xiao Han, Haisheng Tan

At the end, we show that the reconstructed room layout can be utilized to locate a mobile device according to its AoA spectrum, even with single access point.

Intelligent Reflecting Surface Enabled Sensing: Cramér-Rao Lower Bound Optimization

no code implementations23 Apr 2022 Xianxin Song, Jie Xu, Fan Liu, Tony Xiao Han, Yonina C. Eldar

This paper investigates intelligent reflecting surface (IRS) enabled non-line-of-sight (NLoS) wireless sensing, in which an IRS is deployed to assist an access point (AP) to sense a target in its NLoS region.

Joint transmit and reflective beamforming for IRS-assisted integrated sensing and communication

no code implementations26 Nov 2021 Xianxin Song, Ding Zhao, Haocheng Hua, Tony Xiao Han, Xun Yang, Jie Xu

This paper studies an intelligent reflecting surface (IRS)-assisted integrated sensing and communication (ISAC) system, in which one IRS is deployed to not only assist the wireless communication from a multi-antenna base station (BS) to a single-antenna communication user (CU), but also create virtual line-of-sight (LoS) links for sensing targets at areas with LoS links blocked.

Integrated Sensing and Communication from Learning Perspective: An SDP3 Approach

no code implementations20 Jul 2021 Guoliang Li, Shuai Wang, Jie Li, Rui Wang, Fan Liu, Xiaohui Peng, Tony Xiao Han, Chengzhong Xu

Characterizing the sensing and communication performance tradeoff in integrated sensing and communication (ISAC) systems is challenging in the applications of learning-based human motion recognition.

Wireless Sensing With Deep Spectrogram Network and Primitive Based Autoregressive Hybrid Channel Model

no code implementations21 Apr 2021 Guoliang Li, Shuai Wang, Jie Li, Rui Wang, Xiaohui Peng, Tony Xiao Han

Although wireless channel models can be adopted for dataset generation, current channel models are mostly designed for communication rather than sensing.

Scene Understanding

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