异构VDES(VHF data exchange system)星座采用相同的通信频率和时分多址通信机制,使得异构星座重复覆盖区域内存在大量由时隙冲突造成的同频干扰,严重影响通信质量。针对此问题,提出一种基于深度Q网络(DQN)的星座间兼容策略。基于VDES...异构VDES(VHF data exchange system)星座采用相同的通信频率和时分多址通信机制,使得异构星座重复覆盖区域内存在大量由时隙冲突造成的同频干扰,严重影响通信质量。针对此问题,提出一种基于深度Q网络(DQN)的星座间兼容策略。基于VDES通信流程,设置船站作为资源信息中转节点,赋予卫星对通信环境的感知能力。在此基础上,将异构星座场景下的资源分配问题建模为强化学习问题,提出一种基于DQN的时隙资源分配算法。通过重构历史资源信息和当前资源信息,规划最优时隙资源分配方案,并根据结果对算法迭代优化。仿真结果表明,所提出的策略可以有效提高通信性能。展开更多
A novel product code iterative decoding algorithm and its high speed implementation scheme are proposed in this paper. Based on partial combination of selected columns of check matrix, the reduced-complexity syndrome ...A novel product code iterative decoding algorithm and its high speed implementation scheme are proposed in this paper. Based on partial combination of selected columns of check matrix, the reduced-complexity syndrome decoding method is proposed to decode sub-codes of product code and deliver soft output information. So iterative decoding of product codes is possible. The fast sorting algorithm and a look-up method are proposed for high speed implementation of this algorithm. Compared to the conventional weighing iterative algorithm, the proposed algorithm has lower complexity while offering better performance, which is demonstrated by simulations and implementation analysis. The implementation scheme and verilog HDL simulation show that it is feasible to achieve high speed decoding with the proposed algorithm.展开更多
文摘异构VDES(VHF data exchange system)星座采用相同的通信频率和时分多址通信机制,使得异构星座重复覆盖区域内存在大量由时隙冲突造成的同频干扰,严重影响通信质量。针对此问题,提出一种基于深度Q网络(DQN)的星座间兼容策略。基于VDES通信流程,设置船站作为资源信息中转节点,赋予卫星对通信环境的感知能力。在此基础上,将异构星座场景下的资源分配问题建模为强化学习问题,提出一种基于DQN的时隙资源分配算法。通过重构历史资源信息和当前资源信息,规划最优时隙资源分配方案,并根据结果对算法迭代优化。仿真结果表明,所提出的策略可以有效提高通信性能。
基金the National Natural Science Foundation of China.
文摘A novel product code iterative decoding algorithm and its high speed implementation scheme are proposed in this paper. Based on partial combination of selected columns of check matrix, the reduced-complexity syndrome decoding method is proposed to decode sub-codes of product code and deliver soft output information. So iterative decoding of product codes is possible. The fast sorting algorithm and a look-up method are proposed for high speed implementation of this algorithm. Compared to the conventional weighing iterative algorithm, the proposed algorithm has lower complexity while offering better performance, which is demonstrated by simulations and implementation analysis. The implementation scheme and verilog HDL simulation show that it is feasible to achieve high speed decoding with the proposed algorithm.
