arXiv:2503.13468eess.SPcs.LG2025-03

用生成模型模拟长期动态信道,更真实地捕捉非平稳特性。

A CGAN-LSTM-Based Framework for Time-Varying Non-Stationary Channel Modeling

  • 结合CGAN与LSTM生成具备时序相关性的信道数据
  • 生成的信道在统计特性上与实测数据高度一致
  • 适合需要长期信道建模的无线通信系统设计

时变非平稳信道具有复杂的动态变化和时间演化特征,给信道建模与通信系统性能评估带来挑战。现有方法多聚焦于瞬时信道状态预测或短期波动模拟,难以刻画信道的长期演化。本文提出一种混合深度学习框架,融合条件生成对抗网络(CGAN)与长短期记忆网络(LSTM),生成具有长期动态特性的信道序列。通过引入平稳性约束机制,确保生成时序信道具备合理的时序相关性。实验对比了信道统计特征,结果表明生成信道与原始信道在非平稳性表现上高度吻合,且能有效支持后续系统性能评估。

原文摘要 · Abstract (English)

Time-varying non-stationary channels, with complex dynamic variations and temporal evolution characteristics, have significant challenges in channel modeling and communication system performance evaluation. Most existing methods of time-varying channel modeling focus on predicting channel state at a given moment or simulating short-term channel fluctuations, which are unable to capture the long-term evolution of the channel. This paper emphasizes the generation of long-term dynamic channel to fully capture evolution of non-stationary channel properties. The generated channel not only reflects temporal dynamics but also ensures consistent stationarity. We propose a hybrid deep learning framework that combines conditional generative adversarial networks (CGAN) with long short-term memory (LSTM) networks. A stationarity-constrained approach is designed to ensure temporal correlation of the generated time-series channel. This method can generate channel with required temporal non-stationarity. The model is validated by comparing channel statistical features, and the results show that the generated channel is in good agreement with raw channel and provides good performance in terms of non-stationarity.

信道建模生成模型时序建模

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