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Jianhua Zhang

6 papers indexed

arxivcs.SDcs.AI2026-07-21

What the Waveform Knows: Transparent-first Speech and Audio Intelligence with Caption Studio

Cheng Siong Chin, Jianhua Zhang, Mohan Venkateshkumar

Caption Studio is a transparency-first speech and audio intelligence platform that transforms spoken audio and video into structured, searchable content through automated transcription, speaker diarization, speech analytics, signal-level audio analysis, and subtitle generation. T…

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arxivcs.CVcs.LGcs.MM2026-07-20

LFM: Leveraging Foundation Models for Source-Free Universal Domain Adaptation

Jing Li, Pan Liu, Meng Zhao, Wanli Xue, Yanhong Yang, Xu Cheng, et al.

Source-free universal domain adaptation (SF-UniDA) adapts a pre-trained source model to an unlabeled target domain under both covariate and label shifts, without access to source data. However, existing SF-UniDA methods rely on inefficient techniques such as threshold tuning and…

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arxiveess.SP2026-07-13

DeepRT Engine: A Unified GPU-Parallel Ray-Tracing Framework with Hybrid SBR-IM Path Search for 6G Digital Twin Channel

Tao Wu, Li Yu, Yuxiang Zhang, Jianhua Zhang, Qixing Wang, Guangyi Liu

Digital twin channel (DTC) aims to establish a real-time digital counterpart of physical wireless channels for reproducing and predicting site-specific propagation characteristics. As a high-precision channel computation method for realistic propagation scenarios, ray tracing (RT…

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arxiveess.SP2026-07-11

Low-Altitude ISAC With Spherical Directly-Connected Antenna Array: Performance Analysis and Beamforming Optimization

Zhiqiang Xiao, Tao Zhang, Zhenjun Dong, Hao Wu, Xiaoqiang Qiao, Jianhua Zhang

The safety development requirements of low-altitude economy (LAE) renders the robust low-altitude airspace monitoring critical important than ever before. Integrated sensing and communication (ISAC) as one of the key development trends of 6G provides potential solutions for the L…

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arxiveess.SP2026-07-06

A Simultaneous Clustering and Tracking Algorithm for Capturing Cluster-Level Spatial Consistency in 6G Wireless Channels

Jiaxin Lin, Pan Tang, Jianhua Zhang, Zhaowei Chang, Peijie Liu, Yufeng Qin, et al.

Spatial consistency is a fundamental physical property of wireless channels that reflects the smooth evolution of the channel between spatial locations. At the cluster level, it requires similar multipath components (MPCs) remain grouped into the same clusters as the transceivers…

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arxiveess.SP2026-07-01

Measurement-Based Characterization and Statistical Modeling of 6G Urban Low-Altitude A2G Channels across FR1 and FR3

Bin Ao, Jianhua Zhang, Pan Tang, Peijie Liu, Boyang He, Hao Zheng

Unmanned aerial vehicle (UAV) communications have been recognized as a key component of future sixth-generation (6G) space-air-ground-sea integrated networks. Accurate characterization and modeling of air-to-ground (A2G) channels are essential for the design and optimization of l…

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