ID 原文 译文
55477 最后,利用采集的卫星中频信号对多种捕获算法进行了实验对比与性能分析,实验结果表明,多星联合捕获算法可成功对多颗卫星进行并行搜索及快速捕获,平均运行速度相对于传统捕获算法提高了约23%,改善了北斗接收机中信号捕获的处理效率。 Finally, using the acquisition algorithm based on the satellite for a variety of intermediate frequency signal capture the performance experiment contrast and analysis of the experimental results show that the multiple star alliance capture algorithm can be successfully carried out on the number of satellites in parallel search and quickly capture, the average speed by about 23% compared with the traditional capture algorithm, improved the processing efficiency of the beidou receiver signal capture.
55478 为了解决脉冲压缩技术运用于超宽带(ultra-wideband,UWB)雷达系统中在增加其最远探测距离的同时也增加了探测盲区这一问题,提出一种利用长短脉冲相组合的伪随机(pseudo random noise,PRN)码调制的二相编码UWB信号作为雷达信号发射源,在满足短脉冲的最大探测距离大于长脉冲的最小探测盲区的条件下,解决UWB脉冲压缩雷达系统探测盲区的问题。 In order to solve the pulse compression technology using ultra-wideband (UWB) ultra - wideband, radar system to increase its farthest distance also increases the detection blind area of this problem, put forward a kind of combined using pulse length of pseudo random (pseudo random noise, PRN) code modulation of two phase encoding UWB radar signals as a signal source, in meet the short pulse is greater than the maximum detection range under the condition of minimum detection blind area of long pulse, solve the problem of UWB pulse compression radar detection blind area.
55479 Matlab仿真结果表明了理论分析的正确性及所提出的方法可以很大程度减小雷达探测盲区,说明所提出方法的可行性与优越性。 The Matlab simulation results show the validity of the theoretical analysis and the proposed method can greatly reduce the radar detection blind area, feasibility and superiority of the proposed method is illustrated.
55480 针对无人作战飞机(unmanned combat aerial vehicle,UCAV)对地攻击过程中存在的诸多不确定性因素问题,提出基于滚动时域策略和Gauss伪谱法(Gauss pseudospectral method,GPM)的在线实时攻击轨迹决策算法。 For unmanned combat aircraft (unmanned combat aerial vehicle, UCAV) ground attack there are many uncertainty factors in the process of problem, put forward based on the rolling strategy and Gauss pseudo-spectral time domain method (Gauss pseudospectral method, GPM) online real-time attack path decision algorithm.
55481 算法采用滚动时域的优化策略,将全局优化问题转化为一系列相互叠加但不断向前推进的优化区间,通过滚动更新和反馈校正消除不确定误差,同时降低了所提算法的计算复杂度和对计算资源的需求;综合飞行包线约束,武器投射约束和威胁规避约束,采用GPM完成高精度攻击轨迹求解;采用实时迭代策略提供优化初值,通过自适应目标函数切换引导UCAV迅速规避近距突发威胁。 Algorithm USES the rolling time domain optimization strategy, the global optimization problem is transformed into a series of overlapping but constantly move forward optimizing interval, by rolling updates and feedback error correction to eliminate uncertainty, at the same time reduces the computational complexity of the proposed approach and the need for computing resources;Integrated flight envelope, weapons projection and threat avoidance constraints, using GPM finish high precision attack path to solve;Providing real-time iterative strategy is used to optimize the initial value, through adaptive target function switch lead UCAV close quickly to avoid sudden threat.
55482 仿真结果表明,所提算法能够有效消除不确定误差,同时以较高的精度和速度生成可行的攻击轨迹。 The simulation results show that the proposed algorithm can effectively eliminate the uncertainty of error, at the same time with high precision and speed to generate feasible attack path.
55483 提出了一种在正交频分复用(orthogonal frequency division multiplexing,OFDM)信号中产生循环平稳签名的方法,该方法开销低,且在频率选择性衰落信道中仍然具备很好的可检测性,尤其适用于动态频谱接入(dynamic spectrum access,DSA)网络。 Proposed in orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) signal of cycle stationary signature method, this method is low cost, and in the frequency selective fading channel still have good sex can be detected, especially suitable for dynamic spectrum access (dynamic spectrum access, DSA) network.
55484 此外,还给出了该循环平稳签名的检测方法。 In addition, also gives the smooth loop signature detection methods.
55485 仿真结果表明,依靠单个跳频子载波产生的签名,在签名检测性能不恶化的情况下,其开销仅仅是萨顿方法的四分之一。 The simulation results show that rely on a single frequency hopping subcarrier signature, the signature detection performance without deterioration, its cost is only a quarter of Sutton approach.
55486 自适应阵列天线作为全球卫星导航系统(global navigation satellite system,GNSS)抗干扰应用中的重要工具,已经得到了广泛应用。 Adaptive array antenna as a global navigation satellite system (global navigation satellite system, GNSS) an important tool in anti-interference application, has been widely used.