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There is significant recent interest in designing new modulation schemes for doubly-selective channels with large delay and Doppler spreads, where legacy modulation schemes based on time-frequency signal representations underperform.…

Signal Processing · Electrical Eng. & Systems 2026-02-10 Nishant Mehrotra , Sandesh Rao Mattu , Robert Calderbank

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 estimation (CE) for AFDM systems in complex doubly selective…

Signal Processing · Electrical Eng. & Systems 2026-02-18 Xiangjun Li , Zilong Liu , Zhengchun Zhou , Pingzhi Fan

Reconfigurable antenna technology, such as movable antennas (MAs) and rotatable antennas (RAs), has emerged as a promising solution to enhance the communication performance of wireless systems by exploiting the new degree of freedom (DoF)…

Signal Processing · Electrical Eng. & Systems 2026-04-07 Weijia Wang , Changsheng You , Xiaodan Shao , Rui Zhang

The sixth generation (6G) of mobile communications and beyond is expected to enable advanced functionalities, such as integrated sensing and communication (ISAC), while involving diverse terminal/user equipment types from terrestrial to…

Signal Processing · Electrical Eng. & Systems 2026-05-19 Yujie Liu , Yong Liang Guan , David González G. , Halim Yanikomeroglu

The time division multiple access (TDMA) technique has been applied in automotive multiple-input multiple-output (MIMO) radar. However, it suffers from the transmit energy loss, and as a result the parameter estimation performance…

Signal Processing · Electrical Eng. & Systems 2021-03-26 Feng Xu , Sergiy A. Vorobyov , Fawei Yang

Integrated sensing and communication (ISAC) has been widely recognized as one of the key technologies for 6G wireless networks. In this paper, we focus on the waveform design of ISAC system, which can realize radar sensing while also…

Signal Processing · Electrical Eng. & Systems 2025-04-09 Jiangtao Wang , Xuyang Zhao , Muyu Mei , Yongchao Wang

This paper introduces a multi-beam secure communication scheme for mixed near-field and far-field (hNF) scenarios, primarily designed to address the challenges faced by sixth-generation (6G) networks in simultaneously managing near-field…

Signal Processing · Electrical Eng. & Systems 2024-07-24 Wensheng Deng , Bin Qiu , Wenchi Cheng

Wireless relays can effectively extend the transmission range of information. However, if relay technology is utilized unlawfully, it can amplify potential harm. Effectively surveilling illegitimate relay links poses a challenging problem.…

Information Theory · Computer Science 2024-07-11 Qian Dan , Hongjiang Lei , Ki-Hong Park , Weijia Lei , Gaofeng Pan

Post commercial deployment of fifth-generation (5G) technologies, the consideration of sixth-generation (6G) networks is drawing remarkable attention from research communities. Researchers suggest that similar to 5G, 6G technology must be…

Information Theory · Computer Science 2022-12-21 Md. Ibrahim , A. S. M. Badrudduza , Md. Shakhawat Hossen , Milton Kumar Kundu , Imran Shafique Ansari

Integrated sensing and communication (ISAC) system has been envisioned as a promising technology to be applied in future applications requiring both communication and high-accuracy sensing. Different from most research focusing on…

Signal Processing · Electrical Eng. & Systems 2023-08-17 Jintao Wang , Chengwang Ji , Jiajia Guo , Shaodan Ma

This paper studies the detection performance of a multiple-input-multiple-output (MIMO) multifunction radio frequency (MFRF) system, which simultaneously supports radar, communication, and jamming. We show that the detection performance of…

Information Theory · Computer Science 2022-08-29 Bo Tang , Petre Stoica

An integrated sensing and communication (ISAC) framework comprises radar sensing to enable reliable direction beam-based communication between a base station (BS) and mobile user (MU). The ISAC will be an integral part of 6G with potential…

Signal Processing · Electrical Eng. & Systems 2026-03-10 Jai Mangal , Sumit Darak , Shobha Sundar Ram

This work focuses on the use of reconfigurable intelligent surface (RIS) in dual-function radar-communication (DFRC) systems to improve communication capacity and sensing precision, and enhance coverage for both functions. In contrast to…

Signal Processing · Electrical Eng. & Systems 2024-09-10 Bowen Wang , Hongyu Li , Shanpu Shen , Ziyang Cheng , Bruno Clerckx

In this paper, the privacy of wireless transmissions is improved through the use of an efficient technique termed dynamic directional modulation (DDM), and is subsequently assessed in terms of the measure of information leakage. Recently, a…

In modern radar systems, target detection and parameter estimation face significant challenges when confronted with mainlobe jamming. This paper presents a Diffusion-based Model and Data Dual-driven (DMDD) approach to estimate and detect…

Signal Processing · Electrical Eng. & Systems 2025-12-01 Ruohai Guo , Jiang Zhu , Chengjie Yu , Zhigang Wang , Ning Zhang , Fengzhong Qu , Min Gong

Integrated sensing and communication (ISAC) poses various challenges that arise from the communication-centric design of cellular networks. One of them is target detection with time division duplex (TDD) transmission used in current 5G and…

Signal Processing · Electrical Eng. & Systems 2025-05-19 Marcus Henninger , Lucas Giroto de Oliveira , Stephan Saur , Artjom Grudnitsky , Thorsten Wild , Silvio Mandelli

The recent proposed orthogonal time frequency space (OTFS) modulation shows signifcant advantages than conventional orthogonal frequency division multiplexing (OFDM) for high mobility wireless communications. However, a challenging problem…

Information Theory · Computer Science 2022-07-25 Xiangxiang Li , Haiyan Wang , Yao Ge , Xiaohong Shen , Yuanyuan Lei

Symbol-level precoding (SLP) is a promising solution for addressing the inherent interference problem in dual-functional radar-communication (DFRC) signal designs. This paper considers an SLP-DFRC signal design problem which optimizes the…

Signal Processing · Electrical Eng. & Systems 2025-04-22 Ly V. Nguyen , Rang Liu , Nhan Thanh Nguyen , Markku Juntti , Björn Ottersten , A. Lee Swindlehurst

This paper investigates the fundamental limits on the target detection performance with a dual-function multiple-input-multiple-output (MIMO) radar communication (RadCom) systems. By assuming the presence of a point-like target and a…

Information Theory · Computer Science 2022-04-12 Bo Tang , Zhongrui Huang , Lilong Qin , Hai Wang

Integrated sensing and communications (ISAC) as one of the key technologies is capable of supporting high-speed communication and high-precision sensing for the upcoming 6G. This paper studies a waveform strategy by designing the orthogonal…

Signal Processing · Electrical Eng. & Systems 2024-11-13 Ming Lyu , Hao Chen , Dan Wang , Guangyin Feng , Chen Qiu , Xiaodong Xu