邻频干扰对跳频系统通信容量的影响分析

在已知台站布置的跳频系统中,针对邻频干扰对系统通信容量的影响,从信号信息熵角度,分析了接收点干扰信号和噪声的熵功率,利用信号熵和熵功率不等式,推导得出了以信道参数、干扰台站数和可用频点数为变量的系统通信容量公式。仿真结果表明,在干扰台站数较小时,接收点干扰信号的分布取决于信道参数,而不能简单地假设为高斯分布;并验证了所提理论在nakagami信道下的正确性。     

基于Multi-agent协商的多干扰机资源管理

多干扰机协同是组网雷达对抗的一种重要方法。针对多干扰机协同中面临的数据传输率、时效性等因素所引起的干扰资源管理问题,建立了基于中心控制协商和公约协商的干扰资源管理模型,并给出了相应的协同算法与仿真。仿真结果表明：两种方法在组网雷达对抗中均能取得良好的干扰效果及较低的漏威胁目标信号脉冲比例。其中,基于公约的Multi?agent协商在组网干扰资源管理方面具有更好的可行性,其效果优于基于中心控制协商的方法。     

基于模拟退火算法的阵列模型有源校正方法

针对同时存在通道幅度相位不一致与阵列互耦的均匀直线阵列,提出了一种采用模拟退火算法的阵列模型校正方法.该方法使用多个辅助信源分时工作,根据子空间基本原理构造目标函数,采用模拟退火算法对幅相误差矩阵及互耦矩阵进行估计.利用该方法对均匀直线阵进行了计算机仿真与实测实验,仿真及实验结果证明了该方法是有效可行的.     

Inventory transshipment game with limited supply: Trap or treat

Inventory transshipment is generally shown to be beneficial to retailers by matching their excess demand with surplus inventory. We investigate an inventory transshipment game with two newsvendor-type retailers under limited total supply and check whether the retailers are better off than the case without transshipment. We derive the ordering strategies for the retailers and show that unlike the unlimited supply case, a pure Nash equilibrium only exists under certain conditions. Furthermore, contrary to the conventional wisdom, we show that inventory transshipment may not always benefit both retailers. Although one of the retailers is guaranteed to be better off, the other could be worse off. The decision criteria are then provided for the retailers to determine if they will benefit from the exercise of inventory transshipment. Numerical study indicates that the carefully chosen transshipment prices play an important role in keeping inventory transshipment beneficial to both retailers. Subsequently, a coordinating mechanism is designed for the retailers to negotiate transshipment prices that maximize the total profit of the two retailers while keeping each of them in a beneficial position.     

Command Coordination and Tactical Effectiveness in Counter-insurgency Operations: Lessons from the South Korean Campaign

This article analyzes the causes of combat effectiveness of the South Korean security forces through the course of its various counter-insurgency (COIN) operations from 1948 to 1953. We argue that improvements in two interrelated aspects ultimately resulted in higher operational and tactical level performance: unified operational command structure and the subsequent improvements in tactical efficiency under the guidance of the US advisory mission. Through an in-depth case study on how a nascent army improved its capacity in combating homegrown insurgencies, we demonstrate how the actual conduct of operations itself remains just as significant in the assessment of overall COIN outcomes.     

无线通信及其干扰的建模与仿真研究

对无线通信及其干扰建模进行了分析和结构设计,重点研究了无线通信的天线、传播损耗、信噪比、误码率、纠错及通信干扰等主要模型,开发了仿真实例并进行了试验。结果表明：无线通信设备的战术技术性能、战场环境因素和通信干扰等对无线通信效果有极大的影响。     

运用心理学相关理论培育军人核心价值观

培育军人核心价值观,是当前部队思想政治教育的重中之重,其培育途径尤为重要,笔者认为,可以通过培养与激发官兵亲社会行为,来推动与促进军人核心价值观的培育。运用心理学的相关理论,促进亲社会行为的概念与特征、亲社会行为与军人核心价值观的有机结合,培育军人核心价值观。     

两跳OFDM译码转发中继系统的功率分配研究

分析了系统总功率约束和各节点独立功率约束条件下的中继信道,提出了以最大化系统容量为准则的两跳中继系统联合子载波配对和功率优化分配算法。算法先进行子载波配对,然后选出一组信道增益最大的子载波进行平均功率分配,最后通过迭代得到功率分配结果。为了进一步降低系统复杂度,我们利用相邻子载波之间的相关性,用若干相邻子载波组成一个等效子信道。仿真结果表明,所提算法可以在大大降低反馈量的情况下达到和注水功率分配几乎相同的系统容量。     

一种短交织长度匹配交织器设计

针对无迫零比特结构Turbo码,给出了一种短交织长度匹配交织器设计准则,通过确保局部坏点对应Turbo码码重,有效减少了Turbo码字中小重量码字数量。仿真结果表明,与两种传统方法设计的交织器相比,文中算法所得交织器性能更加优良。     

单通道自适应有源消声系统

对单通道自适应有源消声系统进行了频域分析,对系统的有关特性进行了讨论,并分别在半消声室和普通房间进行了降噪实验。在误差传声器周围取得了一定的有效空间范围。