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在空间通信背景下研究了认知干扰/抗干扰的基本问题。场景包括一对发射机、接收机和一部认知干扰机。假定认知干扰机拥有强大的频谱感知能力,能够检测数据通过信道从发射机到接收机的传输过程。相应地,干扰机采用“检测与干扰”策略;发射机-接收机端使用跳频扩展频谱的方法抑制干扰影响。干扰机与发射机-接收机之间基本的干扰/抗干扰问题被建模为二人零和博弈问题。对于频谱感知,假定干扰机采用滑动窗口能量检测,即滑窗能量检测。作为发射机-接收机端的保守策略,在多种情况下获得了干扰/抗干扰博弈的最大最小解。讨论了各种因素如信号传播时延、信道带宽、干扰机/接收机端信噪比等对博弈结果的影响。结果为评估干扰机对空间通信链路的潜在威胁,及空间传输网络抗干扰配置提供了重要信息。
In the background of space communication, the basic problems of cognitive interference and anti-interference are studied. The scene includes a pair of transmitter, receiver and a cognitive jammer. Assuming that the cognitive jammer has a strong spectrum sensing capability, it can detect the transmission of data from the transmitter to the receiver through the channel. Accordingly, the jammer uses the “detection and interference” strategy; and the transmitter-receiver side uses the method of frequency hopping spread spectrum to suppress interference effects. The basic jamming / jamming problem between the jammer and the transmitter-receiver is modeled as a two-person zero-sum game problem. For spectrum sensing, it is assumed that the jammer uses sliding window energy detection, ie sliding window energy detection. As a conservative strategy at the transmitter-receiver side, the maximum and minimum solutions to the interference / anti-interference game are obtained in many cases. The effects of various factors such as signal propagation delay, channel bandwidth, jammer / receiver SNR, etc. on the game results are discussed. The results provide important information for assessing the potential threat of a jammer to a space communication link and the anti-jamming configuration of the space transmission network.