no code implementations • 27 Dec 2023 • Yunxin Li, Fan Liu, Zhen Du, Weijie Yuan, Qingjiang Shi, Christos Masouros
In this study, we propose novel frame structures that incorporate ISAC signals for three crucial stages in the NR-V2X system: initial access, connected mode, and beam failure and recovery.
no code implementations • 19 Dec 2023 • Jun Wu, Weijie Yuan, Zhiqiang Wei, Jinjin Yan, Derrick Wing Kwan Ng
This paper investigates the bit error rate (BER) minimum pre-coder design for an orthogonal time frequency space (OTFS)-based integrated sensing and communications (ISAC) system, which is considered as a promising technique for enabling future wireless networks.
no code implementations • 26 Nov 2023 • Weijie Yuan, Lin Zhou, Saeid K. Dehkordi, Shuangyang Li, Pingzhi Fan, Giuseppe Caire, H. Vincent Poor
The recently proposed Orthogonal Time Frequency Space (OTFS) modulation, which exploits various advantages of Delay Doppler (DD) channels, has been shown to support reliable communication in high-mobility scenarios.
no code implementations • 27 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).
no code implementations • 25 Jun 2023 • Jun Wu, Weijie Yuan, Lajos Hanzo
The real-time unmanned aerial vehicle (UAV) trajectory design of secure integrated sensing and communication (ISAC) is optimized.
no code implementations • 20 Jun 2023 • Kecheng Zhang, Zhongjie Li, Weijie Yuan, Yunlong Cai, Feifei Gao
By multiplexing information symbols in the delay-Doppler (DD) domain, orthogonal time frequency space (OTFS) is a promising candidate for future wireless communication in high-mobility scenarios.
no code implementations • 19 May 2023 • Fuwang Dong, Fan Liu, Shihang Lu, Weijie Yuan, Yuanhao Cui, Yifeng Xiong, Feifei Gao
In particular, a pair of transmission schemes, namely, separated S&C and dual-functional waveform designs, are proposed to optimize the sensing QoS under the constraints of the rate-distortion and power budget.
no code implementations • 1 May 2023 • Zhen Du, Fan Liu, Yunxin Li, Weijie Yuan, Yuanhao Cui, Zenghui Zhang, Christos Masouros, Bo Ai
Connected and autonomous vehicle (CAV) networks face several challenges, such as low throughput, high latency, and poor localization accuracy.
no code implementations • 17 Apr 2023 • Yunpu Zhang, Changsheng You, Weijie Yuan, Fan Liu, Rui Zhang
Extremely large-scale array (XL-array) has emerged as a promising technology to enhance the spectrum efficiency and spatial resolution in future wireless networks, leading to a fundamental paradigm shift from conventional far-field communications towards the new near-field communications.
no code implementations • 30 Jan 2023 • Yunxin Li, Fan Liu, Zhen Du, Weijie Yuan, Christos Masouros
The emergence of the fifth-generation (5G) New Radio (NR) brings additional possibilities to vehicle-to-everything (V2X) network with improved quality of services.
no code implementations • 24 Jan 2023 • Kecheng Zhang, Weijie Yuan, Shuangyang Li, Fan Liu, Feifei Gao, Pingzhi Fan, Yunlong Cai
The recently proposed orthogonal time frequency space (OTFS) modulation multiplexes data symbols in the delay-Doppler (DD) domain.
no code implementations • 28 Dec 2022 • Chang Liu, Shuangyang Li, Weijie Yuan, Xuemeng Liu, Derrick Wing Kwan Ng
This paper investigates the orthogonal time frequency space (OTFS) transmission for enabling ultra-reliable low-latency communications (URLLC).
no code implementations • 26 Sep 2022 • Chang Liu, Xuemeng Liu, Shuangyang Li, Weijie Yuan, Derrick Wing Kwan Ng
Predictive beamforming design is an essential task in realizing high-mobility integrated sensing and communication (ISAC), which highly depends on the accuracy of the channel prediction (CP), i. e., predicting the angular parameters of users.
no code implementations • 24 May 2022 • Xiao Meng, Fan Liu, Christos Masouros, Weijie Yuan, Qixun Zhang, Zhiyong Feng
In this paper, we propose sensing-assisted beamforming designs for vehicles on arbitrarily shaped roads by relying on integrated sensing and communication (ISAC) signalling. Specifically, we aim to address the limitations of conventional ISAC beam-tracking schemes that do not apply to complex road geometries.
no code implementations • 19 Nov 2021 • Zhen Du, Fan Liu, Weijie Yuan, Christos Masouros, Zenghui Zhang, Shuqiang Xia, Giuseppe Caire
The first stage is exploited for ISAC transmission, where a wide beam is adopted for both communication and sensing.
no code implementations • 26 Aug 2021 • Chang Liu, Weijie Yuan, Shuangyang Li, Xuemeng Liu, Husheng Li, Derrick Wing Kwan Ng, Yonghui Li
Specifically, the convolution and LSTM modules are successively adopted in the proposed HCL-Net to exploit the spatial and temporal dependencies of communication channels to further improve the learning performance.
no code implementations • 7 May 2021 • Weijie Yuan, Zhiqiang Wei, Shuangyang Li, Jinhong Yuan, Derrick Wing Kwan Ng
Benefiting from the OTFS-ISAC signals, the roadside unit (RSU) is capable of simultaneously transmitting downlink information to the vehicles and estimating the sensing parameters of vehicles, e. g., locations and speeds, based on the reflected echoes.
no code implementations • 14 Jan 2021 • Zhiqiang Wei, Weijie Yuan, Shuangyang Li, Jinhong Yuan, Derrick Wing Kwan Ng
OTFS channel estimation is first formulated as a one-dimensional (1D) off-grid sparse signal recovery (SSR) problem based on a virtual sampling grid defined in the DD space, where the on-grid and off-grid components of the delay and Doppler shifts are separated for estimation.
Information Theory Information Theory
no code implementations • 11 Jan 2021 • Shuangyang Li, Weijie Yuan, Zhiqiang Wei, Jinhong Yuan
Different from conventional OTFS detection methods, the proposed algorithm applies basic estimation/detection approaches to both the time domain and delay-Doppler (DD) domain and iteratively updates the extrinsic information from two domains with the unitary transformation.
Information Theory Information Theory
no code implementations • 16 Sep 2020 • Chang Liu, Weijie Yuan, Zhiqiang Wei, Xuemeng Liu, Derrick Wing Kwan Ng
Unmanned aerial vehicle (UAV)-assisted communication becomes a promising technique to realize the beyond fifth generation (5G) wireless networks, due to the high mobility and maneuverability of UAVs which can adapt to heterogeneous requirements of different applications.
no code implementations • 15 May 2020 • Weijie Yuan, Fan Liu, Christos Masouros, Jinhong Yuan, Derrick Wing Kwan Ng, Nuria Gonzalez-Prelcic
To accurately estimate the motion parameters of vehicles in real-time, we propose a novel message passing algorithm based on factor graph, which yields near optimal solution to the maximum a posteriori estimation.