ID 原文 译文
22765 仿真结果表明，该算法依据环境变化自适应调整指标权值，提高了虚拟网映射成功率和收益开销比。 Simulation results show that the proposed algorithm can improve the acceptance radio and the revenue to cost ratio by adjusting the weights according to the environment.
22766 现有针对异构蜂窝网多点协作安全传输的研究集中于增强主信道质量以提升安全性，然而多基站协作又使基站和窃听者之间的平均距离变近，网络的安全性受限于距离协作基站较近的窃听者。 The existing researches on Coordinated Multi-Point transmission (Co MP) secure transmission in heterogeneous cellular networks mainly focus on improving the quality of the main channel to enhance security. However, CoMP also makes the average distance between base station and eavesdropper close which makes the security threat more severe.
22767 针对该问题，该文提出一种基于安全保护域的增强型多点协作传输机制。 Based on secrecy guard zone, an enhanced CoMP policy is proposed in this paper.
22768 然后，理论分析了用户的连接中断概率、安全中断概率以及安全吞吐量。 Then, the connection outage probability, secrecy outage probability and secrecy throughput are analyzed.
22769 进一步，以最大化安全吞吐量为目标，优化协作微基站的发射功率以及有用信息功率分配比例系数。 Furthermore, the transmission power and power allocation factor are designed very carefully to maximize the secrecy throughput.
22770 仿真结果表明，相比于传统的多点协作安全传输机制，在存在严重安全威胁(窃听者密度较大)的场景下，所提机制可以实现非零系统安全吞吐量；在存在较小安全威胁(窃听者密度较小)的场景下，系统安全吞吐量最大可提升 76.1%。 Simulation results show that compared with conventional CoMP policy, the proposed policy can not only achieve non-zero secrecy throughput when faced with severe security threats (i.e. for larger eavesdropper density), but also improve the secrecy throughput of 76.1% at most when faced with small security threats (i.e. for smaller eavesdropper density).
22771 基于交替方向乘子法(ADMM)的改进惩罚函数 LDPC 译码算法能够提升译码性能，但其所需优化参数过多且性能提升有限。 The LDPC decoding algorithm with improved penalty function can improve the performance of decoding algorithm based on Alternating Direction Method of Multipliers (ADMM), but it has too many parameters to be optimized and the performance improvement is limited.
22772 针对该问题，将该算法与其它带有惩罚函数的译码算法比较后发现，两者的不同之处仅在于译码算法中变量节点的更新规则不同。 For this problem, by comparing it with other decoding algorithms with penalty function, it is found that the difference between them is only the update rules of variable nodes in the decoding algorithm.
22773 因此，该文通过构造一种新的变量节点的更新方法去减少优化参数数目并提升译码性能。 Therefore, a new update method for variable nodes is proposed in this paper to reduce the number of parameters and improve the decoding performance.
22774 实验仿真表明，相较于原有算法，该文所提算法有效减少了所需优化的参数数目，此外，所提算法的平均迭代次数更少且能实现约 0.1 dB 的性能提升。 The simulation results show that, compared with the original decoding algorithm, the decoding algorithm in this paper reduces the parameters which need to be optimized, in addition, the average number of iterations of the algorithm is less and the algorithm can achieve about 0.1 dB performance improvement.