ID 原文 译文
47146 最后，通过粒子滤波以数值逼近方式得到估计结果。 Finally, approximated estimation results were obtained by using aparticle filter.
47147 仿真结果表明，通过准确获取出感知时间差，所提出的异步感知算法可有效消除接收信号的信息不确定性，从而显著提高频谱感知性能。 The simulation results show that the proposed asynchronous scheme significantly eliminates the uncertaintyof the received signal information and thus improves the spectrum sensing performance by obtaining the time differenceaccurately.
47148 针对基于网络编码云存储系统数据更新时通信开销过大的问题，提出一种差分数据更新方案， In order to solve the problem that the communication overhead of date update was too large on net-work-coding-based cloud storage system, a new differential data update scheme was proposed.
47149 通过对文件中更新部分进行编码和压缩传输，降低了更新过程中的通信开销。 By encoding and com-pressing the updated part of file, the communication overhead was reduced significantly.
47150 设计实现了基于网络编码的云存储原型系统，在真实网络环境中进行部署和测试， A network-coding-based storageprototype system was designed and implemented, and update scheme was deployed in the real network settings.
47151 实验结果表明，与现有更新方案相比，所提方案通信开销更小，具有更好的可扩展性。 Experi-mental results show that the proposed scheme has less communication overhead and better scalability than the existingschemes.
47152 针对时变大多普勒干扰提出了基于直扩信号结构的多普勒估计方法，通过相邻接收扩频符号的匹配相关运算及能量检测可实现对接收扩频信号中的多普勒实时估计。 A Doppler estimation method based on the structural features of spread spectrum signal was proposed, whichcould achieve real-time Doppler estimation for received spread spectrum signals by energy detecting the result of match-ing correlation calculation of adjacent received spreading symbols.
47153 同时，该方法充分利用扩频处理增益，在低信噪比条件下仍然可以完成多普勒估计。 In addition, this method made full use of the spreadspectrum processing gain and could do Doppler estimation under low SNR condition.
47154 在此基础上，提出改进差分能量检测器接收机算法，通过比较接收端相关器输出能量完成解码，可有效应对多普勒效应带来的快速载波相位跳变干扰以及时变的多途扩展干扰， Improved differential energy detec-tor was further proposed, which can effectively deal with the rapid carrier phase fluctuation interference caused by Dopp-ler effect and time-varying multi-path interference by detecting the output energy of two correlators.
47155 从而保证了直扩水声通信系统在复杂干扰条件下稳定可靠工作。 Simulation verifiedthe robustness of improved differential energy detector algorithm and the Doppler estimation method based on spreadspectrum signal.