基于功率谱对消的时域相关认知跳频谱检测算法

发布时间：2018-01-30 22:57

本文关键词： 通信技术认知跳频功率谱对消时域相关　出处：《兵工学报》2017年09期 　论文类型：期刊论文

【摘要】：认知跳频技术将认知无线电运用到跳频通信中,通过检测认知跳频频谱中的"频谱空穴"来更新跳频点集,避免频点碰撞,提高频谱利用率。针对频谱检测中的时域相关算法因噪声和授权信号的存在,导致频谱空穴的判定门限难以确定,从而使占用信号的检测概率较低的问题,提出了一种基于功率谱对消的时域相关算法来检测跳频谱。与未经过功率谱对消运算的传统时域相关算法相比,该算法能有效提高信号的检测概率,具有实时性好、克服白噪声不确定性、抑制授权信号干扰的优点。理论分析与仿真结果表明,基于功率谱对消的时域相关算法优于传统时域相关算法。
[Abstract]:The cognitive frequency hopping technology applies cognitive radio to frequency hopping communication. By detecting the "spectrum holes" in the cognitive frequency hopping spectrum, the frequency hopping point set is updated to avoid frequency point collision. Because of the noise and the existence of authorized signal, it is difficult to determine the threshold of spectrum hole, which makes the detection probability of occupied signal low. A time-domain correlation algorithm based on power spectrum cancellation is proposed to detect hopping spectrum. Compared with the traditional time-domain correlation algorithm without power spectrum cancellation, this algorithm can effectively improve the detection probability of signals. The theoretical analysis and simulation results show that the time-domain correlation algorithm based on power spectrum cancellation is superior to the traditional time-domain correlation algorithm.
【作者单位】：装甲兵工程学院信息工程系;
【分类号】：TN914.41
【正文快照】： 0引言跳频通信具有低截获、抗干扰等特点,在军事通信、网电空间战中广泛应用,当前战术通信电台多采用跳频技术来提高通信的抗干扰能力。然而传统跳频通信是在确定、静态的频点集上进行通信,尽管使用多套(约定的备用方案)跳频点集,但由于缺少对频谱的认知能力,使跳频点集固定,

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