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cs.IT2026
Diffusion-Based Noise-Adaptive Null-Space Channel Estimation for OFDM Systems
Heqiang Qi, Yirun Chen, Xiangming Meng +3
Accurate channel estimation in orthogonal frequency division multiplexing (OFDM) systems remains challenging when demodulation reference signal (DMRS) observations are sparse and n…
cs.IT2025
Generative Spectrum Cartography: Unified Reconstruction and Active Sensing via Diffusion Models
Yuntong Gu, Xiangming meng, Zhiyuan Lin +2
High-fidelity spectrum cartography is important for spectrum monitoring and wireless situational awareness, especially in satellite-based wide-area sensing scenarios where measurem…
cs.IT2019
Mutual Information Approximation
Chongjun Ouyang, Sheng Wu, Hongwen Yang
To provide an efficient approach to characterize the input-output mutual information (MI) under additive white Gaussian noise (AWGN) channel, this short report fits the curves of e…