Underwater acoustic (UWA) communication provides an effective way for underwater
devices to establish wireless links, which is crucial for the development of Internet of …

In underwater acoustic channels, multipath propagation and Doppler frequency can distort
the received signal and reduce system reliability. In order to effectively combat multipath …

In this paper, we propose a covert underwater acoustic communication method that is robust
to fading using a chirp signal combined with a frequency-hopping spread spectrum scheme …

针对多个无人机遥控信号的分离问题, 提出一种基于时频分析进行数据处理的多跳频(frequency
hopping, FH) 信号盲源分离(blind source separation, BSS) 算法. 利用不同跳周期的跳频信号 …

Abstract Underwater Acoustic Sensor Networks (UASN) have to cope with high and variable
delays, disruptions and disconnections between nodes, because underwater acoustic …

针对卫星导航应用中线性调频(linearfrequencymodulated, LFM) 干扰统计特征时变引起的抗
干扰性能下降问题, 提出了一种基于数据空时频三维特征分组的空频自适应处理(space …

为了解决低信噪比条件下跳频信号参数估计难度大的问题, 提出一种基于时频分析方法的跳频
信号参数估计方法. 首先对跳频信号进行时频变换, 获得时频图像, 通过能量对消去除定频信号 …

针对Chirp 基调制信号在分数阶傅里叶变换域特征明显, 信号周期易被检测等问题,
提出一种能够实现多域隐蔽的低检测概率(lowprobabilityofdetection, LPD) 波形构造方法 …

传统跳频(FH) 通信技术具有抗干扰能力强, 截获概率低等优点, 广泛应用在军民领域.
针对检测传统跳频的手段越来越成熟, 信息易被截获的问题, 该文借鉴正交频分复用(OFDM) …

针对现有多跳频信号参数估计方法构造的基字典与信号不匹配的问题, 提出了基于原子范数的时
频参数估计方法. 首先定义无限原子集合并建立原子范数最小化模型, 再利用其对偶问题完成对 …