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Suppressing the inter-carrier interference (ICI) is crucial for differentially coherent detection in underwater acoustic (UWA) orthogonal frequency division multiplexing (OFDM) systems due to the fact that the UWA channel is inherently…

信息论 · 计算机科学 2021-03-09 Yunlong Huang , Yuzhou Li

In underwater acoustic (UWA) communication, orthogonal frequency division multiplexing (OFDM) is commonly employed to mitigate the inter-symbol interference (ISI) caused by delay spread. However, path-specific Doppler effects in UWA…

信号处理 · 电气工程与系统科学 2024-09-24 Xiaoquan You , Hengyu Zhang , Xuehan Wang , Jintao Wang

Physical-layer network coding (PNC) can increase end-to-end throughput in bi-directional multi-hop underwater acoustic (UWA) networks. However, multipath delay spread and Doppler-induced inter-carrier interference (ICI) in UWA channels can…

网络与互联网体系结构 · 计算机科学 2026-04-24 Gewei Zhang , Deqing Wang , Lizhao You , Xiangming Cai , Liqun Fu

In this paper, we propose an encoder-decoder neural architecture (called Channelformer) to achieve improved channel estimation for orthogonal frequency-division multiplexing (OFDM) waveforms in downlink scenarios. The self-attention…

信号处理 · 电气工程与系统科学 2023-02-10 Dianxin Luan , John Thompson

This paper addresses the problem of frequency-domain inter-carrier interference (ICI) mitigation for differential orthogonal frequency-division multiplexing (OFDM) systems. The classical fractional fast Fourier transform (F-FFT), adopting…

信息论 · 计算机科学 2021-10-12 Jihui Qiu , Yuzhou Li , Yunlong Huang , Yimeng Wang , Lingyu Gu

This paper proposes a novel non-orthogonal affine frequency division multiplexing (nAFDM) waveform for reliable high-mobility communications with enhanced spectral efficiency (SE). The key idea is to introduce a bandwidth compression factor…

信息论 · 计算机科学 2026-02-17 Qin Yi , Zilong Liu , Leila Musavian , Zeping Sui

In this paper, we propose a deep learning-based signal detector called TransD3D-IM, which employs the Transformer framework for signal detection in the Dual-mode index modulation-aided three-dimensional (3D) orthogonal frequency division…

信号处理 · 电气工程与系统科学 2023-09-12 Toan Gian , Tien-Hoa Nguyen , Trung Tan Nguyen , Van-Cuong Pham , Thien Van Luong

In this work we present a full-duplex (FD) underwater acoustic (UWA) communication system simultaneously transmitting and receiving acoustic signals in the same frequency bandwidth. To simplify the FD hardware, the system exploits a…

信号处理 · 电气工程与系统科学 2025-10-15 Lu Shen , Benjamin Henson , Long Shi , Yuriy Zakharov

Due to the limited available bandwidth and dynamic channel, data rates are extremely limited in underwater acoustic (UWA) communications. Addressing this concern, in-band fullduplex (IBFD) has the potential to double the efficiency in a…

信号处理 · 电气工程与系统科学 2020-05-25 Mohammad Towliat , Zheng Guo , Leonard J. Cimini , Xiang-Gen Xia , Aijun Song

Transformers are powerful neural architectures that allow integrating different modalities using attention mechanisms. In this paper, we leverage the neural transformer architectures for multi-channel speech recognition systems, where the…

音频与语音处理 · 电气工程与系统科学 2021-02-09 Feng-Ju Chang , Martin Radfar , Athanasios Mouchtaris , Brian King , Siegfried Kunzmann

We present AttDet, a Transformer-inspired MIMO (Multiple Input Multiple Output) detection method that treats each transmit layer as a token and learns inter-stream interference via a lightweight self-attention mechanism. Queries and keys…

信号处理 · 电气工程与系统科学 2025-10-24 András Rácz , Tamás Borsos , András Veres , Benedek Csala

Previous studies on event camera sensing have demonstrated certain detection performance using dense event representations. However, the accumulated noise in such dense representations has received insufficient attention, which degrades the…

机器人学 · 计算机科学 2025-06-12 Yangjie Cui , Boyang Gao , Yiwei Zhang , Xin Dong , Jinwu Xiang , Daochun Li , Zhan Tu

Object detection with Transformers (DETR) has achieved a competitive performance over traditional detectors, such as Faster R-CNN. However, the potential of DETR remains largely unexplored for the more challenging task of arbitrary-oriented…

计算机视觉与模式识别 · 计算机科学 2021-06-08 Teli Ma , Mingyuan Mao , Honghui Zheng , Peng Gao , Xiaodi Wang , Shumin Han , Errui Ding , Baochang Zhang , David Doermann

It is challenging to design an equalizer for the complex time-frequency doubly-selective channel. In this paper, we employ the deep unfolding approach to establish an equalizer for the underwater acoustic (UWA) orthogonal frequency division…

信号处理 · 电气工程与系统科学 2023-06-02 Hao Zhao , Cui Yang , Yalu Xu , Fei Ji , Miaowen Wen , Yankun Chen

Terahertz (THz) communications are envisioned as a key technology of next-generation wireless systems due to its ultra-broad bandwidth. One step forward, THz integrated sensing and communication (ISAC) system can realize both unprecedented…

信号处理 · 电气工程与系统科学 2022-11-30 Yongzhi Wu , Filip Lemic , Chong Han , Zhi Chen

This paper investigates the impacts of Inter-Channel Interference (ICI) effects on a shallow underwater acoustic (UWA) orthogonal frequency-division multiplexing (OFDM) communication system. Considering both the turbulence of the water…

信息论 · 计算机科学 2021-01-07 Do Viet Ha , Tien Hoa Nguyen , Van Duc Nguyen

This paper proposes low complexity detection for internet of underwater things (IoUT)s communication. The signal is transmitted from the source to the destination using several sensors. To simplify the computational operations at the…

信号处理 · 电气工程与系统科学 2022-03-24 Amer Aljanabi , Osama Alluhaibi , Qasim Z. Ahmed , Fahd A. Khan , Waqas-Bin-Abbas , Pavlos I. Lazaridis

Indirect structural health monitoring (iSHM) for broken rail detection using onboard sensors presents a cost-effective paradigm for railway track assessment, yet reliably detecting small, transient anomalies (2-10 cm) remains a significant…

机器学习 · 计算机科学 2025-10-10 Sizhe Ma , Katherine A. Flanigan , Mario Bergés , James D. Brooks

We propose a dynamic encoder transducer (DET) for on-device speech recognition. One DET model scales to multiple devices with different computation capacities without retraining or finetuning. To trading off accuracy and latency, DET…

In this paper, we present the acoustic transceiver developed for the positioning system in underwater neutrino telescopes. These infrastructures are not completely rigid and need a positioning system in order to monitor the position of the…

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