共查询到19条相似文献,搜索用时 182 毫秒
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为提高相控阵雷达资源管理的实时性,提出了一种基于最优线性无偏估计滤波(Best Linear Unbiased Estimation,BLUE)和后验克拉美罗界(Posterior Cramer-Rao Lower Bound,PCRLB)的快速雷达资源管理算法.首先,使用BLUE算法代替传统跟踪滤波算法,完成目标跟踪,并得到目标在直角坐标系下的状态估计;然后,快速计算得到PCRLB作为代价函数,形成雷达资源管理模型;最后,利用该模型对多目标进行波束和驻留时间的分配.仿真结果表明,该算法以BLUE方法进行跟踪滤波,避免了传统PCRLB计算中雅可比矩阵(Jacobian Matrix)的运算,在保持跟踪精度的同时大幅减少运算量;以两步资源管理算法完成对波束、驻留时间的联合管理,合理分配雷达资源. 相似文献
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针对先进战机射频集成系统"一对多"干扰时的资源管控问题,首先,讨论了基于有源相控阵天线的雷达/电子战一体化设计方案;然后,采用多属性决策方法建立了电子战目标威胁等级评估模型;通过设置威胁等级门限建立干扰任务请求模型;最后,采用时分复用的方式对干扰空间内的多个目标进行干扰,提出了干扰资源的自适应动态分配方法。该方法基于威胁等级偏差均值最小准则或最大威胁等级偏差最小准则,可以结合相控阵雷达资源管理算法,实现雷达/干扰资源综合管控。通过不同威胁等级门限的仿真,表明自适应管控策略能够实现干扰资源的动态分配。 相似文献
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针对协方差控制的策略不满足雷达跟踪目标的实时性要求,文中采用协方差和目标威胁度联合控制的方法来研究关于相控阵雷达波束调度的问题,建立相控阵雷达波束分配的最优化模型。该模型利用目标的运动状态信息,包括目标距离、目标径向速度、加速度和航向,利用层次分析法确定目标威胁度,然后与目标跟踪协方差相结合进一步确定目标优先级,实现目标动态的搜索加跟踪模式(TAS)的波束调度。将该算法与传统的顺序波束调度方法进行比较,仿真结果表明该算法具有较高的时间利用效率,同时也具有较好跟踪性能。 相似文献
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自适应协方差控制的传感器分配算法 总被引:2,自引:0,他引:2
基于协方差控制策略设计的传感器分配算法,其协方差控制能力是评价算法性能优劣的重要指标,目前尚缺乏具体的性能度量标准来衡量这类算法的协方差控制能力,使得实际设计分配算法时缺少必要的参考。为此,该文建立了衡量算法协方差控制能力、传感器资源占用程度和算法稳健性等性能度量指标,并提出了一种自适应协方差控制的传感器分配算法,该算法通过引入新的优化目标函数,以达到提高算法协方差控制能力的目的。仿真结果表明,该算法的协方差控制能力要优于基于信息增益的分配算法,并且基本不受矩阵度量的影响,是一种稳健的传感器分配算法。 相似文献
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Power control in direct sequence code division multiple access (DS-CDMA) systems and power/rate allocation in multirate DS-CDMA based networks is an open and interesting research area which has attracted much attention. However, with a few exceptions, most researchers have emphasized centralized resource allocation algorithms for cellular systems where the base station keeps track of the requirements of the various users and is thus responsible for the management of network resources. Ad hoc wireless local area networks (WLANs), on the other hand, are generally configured as peer-to-peer networks with no centralized hub or controller. Thus resource allocation has to be conducted in a distributed fashion. We address the issue of distributed resource management for multirate DS-CDMA based multimedia WLANs by (1) presenting a distributed resource allocation protocol, known as distributed resource negotiation protocol (DRNP) that builds on the RTS/CTS bandwidth reservation mechanism provided by IEEE 802.111, and provides quality of service (QoS) guarantees through distributed control of resources in DS-CDMA based multimedia WLANs and (2) investigating the performance of various resource allocation schemes within the context of DRNP, in terms of network wide metrics such as overall throughput and blocking rates 相似文献
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When adaptive arrays are applied to practical problems, the performances of the conventional adaptive beamforming algorithms are known to degrade substantially in the presence of even slight mismatches between the actual and presumed array responses to the desired signal. Similar types of performance degradation can occur because of data nonstationarity and small training sample size, when the signal steering vector is known exactly. In this paper, to account for mismatches, we propose robust adaptive beamforming algorithm for implementing a quadratic inequality constraint with recursive method updating, which is based on explicit modeling of uncertainties in the desired signal array response and data covariance matrix. We show that the proposed algorithm belongs to the class of diagonal loading approaches, but diagonal loading terms can be precisely calculated based on the given level of uncertainties in the signal array response and data covariance matrix. The variable diagonal loading term is added at each recursive step, which leads to a simpler closed-form algorithm. Our proposed robust recursive algorithm improves the overall robustness against the signal steering vector mismatches and small training sample size, enhances the array system performance under random perturbations in sensor parameters and makes the mean output array SINR consistently close to the optimal one. Moreover, the proposed robust adaptive beamforming can be efficiently computed at a low complexity cost compared with the conventional adaptive beamforming algorithms. Computer simulation results demonstrate excellent performance of our proposed algorithm as compared with the existing adaptive beamforming algorithms. 相似文献
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基于跟踪精度控制的传感器管理方法研究 总被引:4,自引:4,他引:0
军用多传感器系统往往需要在保证完成任务的同时,尽可能地隐蔽自己,为此要求传感器管理系统必须能够在满足跟踪精度要求的前提下,最大限度地降低对资源的使用,特别是减少主动传感器的开机时间。基于该目的,讨论了一种基于跟踪精度控制的传感器管理方法,该方法利用协方差控制技术,保证系统在满足给定性能指标的前提下,对传感器资源的利用最少,从而提高了系统的抗毁性。同时对给定精度过高,造成的系统无解情况给出了一种解决方案,并通过对一个单目标跟踪场景的仿真,验证了该方法的有效性。 相似文献
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网格资源管理的研究与发现 总被引:1,自引:1,他引:0
提出一种采用分布式动态层次结构的资源管理模型方法。依据资源之间的网络通信性能使资源组织成带层次的树型组织结构,根据网格资源类别在逻辑上划分多个社区,使得资源的组织方式能够反映实际的网络拓扑,为计算任务在资源上的合理分配提供了依据,避免了资源选择的盲目性。在该资源管理模型中的资源发现与定位,采用资源树查找算法,多种请求定位策略,可以快速地找到目标结点,提高相应查找时间。资源定位的效率仿真表明这种方法可以提高查找速度和性能。 相似文献
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在第三代移动通信的无线资源管理机制中,分组调度机制在保证预期的服务质量(QoS)和优化无线资源的利用率方面起到了至关重要的作用.至今已经有很多的调度算法被提出,用来有效地提高无线网络资源的利用率.本文提出一种基于Eb/No并且利用功率控制和管理机制的无线分组公平调度算法用来保证QoS,优化资源配置并且达到调度公平性. 相似文献
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Optimal Resource Allocation for Two-Way Relay-Assisted OFDMA 总被引:1,自引:0,他引:1
《Vehicular Technology, IEEE Transactions on》2009,58(7):3311-3321