ID 原文 译文
45746 然而，数字波束成形中过高的峰均比会造成信号发射端功率放大器进入非线性工作区域。 However, the high peak-to-average power ratio in digital beam-forming would make the power amplifier work in the nonlinear region.
45747 针对现阶段概率类方法中的选择性映射类算法带宽利用率低和运算复杂度高的问题，提出一种基于 MUSIC 算法的盲选择性映射方法。 Nowadays, the solutions to the high peak-to-average power ratio, such as selected mapping, embedded side information selected mapping have some faults: the complexity is high, and the utilization of the bandwidth is low. A blind selected mapping method to reduce the high peak-to-average power ratio based on MUSIC algorithm was proposed.
45748 该方法不用传输边带信息，就可提高频带的利用率； In this method, the side information was omitted, so the utilization of the bandwidth was improved.
45749 同时，在运算复杂度和峰均比的抑制效果上，所提方法较选择性映射算法有一定的改善。 Simultaneously, the result of the peak-to-average power ratio reduction and the complexity is much more enhanced.
45750 JPEG2000 是一种具有高效压缩性能的图像压缩标准，但抗差错能力和安全性不能满足实际应用要求。 Although the JPEG2000 compression standard has high coding efficiency, its error resistance and security can’t meet the requirements of practical application.
45751 基于此，提出一种基于混沌冗余和阈值控制的联合算术码双向编译码快速算法， Based on this, a fast bidirectionally-decodable arithmetic coding method with chaotic redundancy and threshold control was proposed.
45752 在编码端保留多个冗余符号，用混沌系统控制冗余符号的比例增强算术码编码的安全性； At the encoder, the chaotic map controlled the probabilities of multiple redundant symbols to enhance the security of arithmetic coding.
45753 在译码端采用阈值控制和双向译码相结合，实现基于最大后验概率的联合快速译码。 At the decoder, threshold control and bidirectional decoding were combined to realize fast decoding based on maximum a posteriori estimation.
45754 仿真结果表明，所提算法相对现有算法改善了重建图像质量，同时降低译码复杂度，具有良好的抗差错性和安全性。 Simulation results show that the proposed method improves the reconstructed image quality with better error resistance and security.
45755 云服务是天地一体化信息网络的重要应用形式之一， Cloud computing is one of the space-ground integration information network applications.