针对端到端通信系统在信道未知时通过使用生成对抗网络(Generative Adversarial Network,GAN)表示信道效应而产生的梯度消失和过拟合问题,提出了一种通过互信息作为正则化项的改进方案。通过互信息神经估计器(Mutual Information Neural...针对端到端通信系统在信道未知时通过使用生成对抗网络(Generative Adversarial Network,GAN)表示信道效应而产生的梯度消失和过拟合问题,提出了一种通过互信息作为正则化项的改进方案。通过互信息神经估计器(Mutual Information Neural Estimator,MINE)计算发射信号与接收信号的互信息并由此作为正则化项来提高模型的泛化能力,从而缓解过拟合问题,而其中产生的额外梯度可以缓解梯度消失问题,从而提高了模型的学习性能。从仿真结果来看,改进后的方案表现出了更好的鲁棒性,并且在加性高斯白噪声(Additive White Gaussian Noise,AWGN)信道、瑞利衰落信道上获得了更好的误比特率性能。此外,在频率选择性信道上,改进后的方案获得了1 dB左右误比特率性能的改善。展开更多
Vanadium alloy has been taken as one of the candidate structural materials for fusion reactors because of its excellent high-temperature mecha nical performances, high thermal stress factor and low radioactivity. It i...Vanadium alloy has been taken as one of the candidate structural materials for fusion reactors because of its excellent high-temperature mecha nical performances, high thermal stress factor and low radioactivity. It is a kind of potential materials for hydrogen storage as well. Because operated in an environment conta!ning hydrogen and its isotopes or the neutron irradiation resulting transmutation product of H, the problem that H induced degradation of mechanical properties and hydrogen embrittlement has been being one of the key issues for the application for vanadium alloys.展开更多
文摘针对端到端通信系统在信道未知时通过使用生成对抗网络(Generative Adversarial Network,GAN)表示信道效应而产生的梯度消失和过拟合问题,提出了一种通过互信息作为正则化项的改进方案。通过互信息神经估计器(Mutual Information Neural Estimator,MINE)计算发射信号与接收信号的互信息并由此作为正则化项来提高模型的泛化能力,从而缓解过拟合问题,而其中产生的额外梯度可以缓解梯度消失问题,从而提高了模型的学习性能。从仿真结果来看,改进后的方案表现出了更好的鲁棒性,并且在加性高斯白噪声(Additive White Gaussian Noise,AWGN)信道、瑞利衰落信道上获得了更好的误比特率性能。此外,在频率选择性信道上,改进后的方案获得了1 dB左右误比特率性能的改善。
基金Supported by the National Natural Science Foundation of China ( 50271025 )
文摘Vanadium alloy has been taken as one of the candidate structural materials for fusion reactors because of its excellent high-temperature mecha nical performances, high thermal stress factor and low radioactivity. It is a kind of potential materials for hydrogen storage as well. Because operated in an environment conta!ning hydrogen and its isotopes or the neutron irradiation resulting transmutation product of H, the problem that H induced degradation of mechanical properties and hydrogen embrittlement has been being one of the key issues for the application for vanadium alloys.