Digital channelized receiver based on time-frequency analysis for signal interception
Digital channelized receiver based on time-frequency analysis for signal interception
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DOI：
10.1109/taes.2005.1541437
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发表时间：
2005-07-01
影响因子：
4.4
通讯作者：
Sanz-Osorio, A
中科院分区：
文献类型：
--
作者：
López-Risueño, G;Grajal, J;Sanz-Osorio, A
提出了一种数字信道化接收机，用于截获各种复杂结构的信号，包括那些低截获概率的信号。从时频分析的角度设计了接收机。它使用了一种基于短时傅立叶变换（STFT）的非相干积分的扩展时频表示，检测系统和编码器都是在STFT上工作的。编码器包括鲁棒的频率估计、自动调制识别和聚类，以处理宽带和同步信号，并防止信道外检测（信道化接收器中的典型现象）。该接收机已被评估为广泛的信号，并显示出良好的性能，在检测，估计和处理的同时信号。从现实生活中的系统和合成信号收集的信号已被利用。
A digital channelized receiver is presented for the interception of a wide variety of signals of complex structure, including those with low probability of interception. The receiver is designed from the perspective of the time-frequency analysis. It uses an extended time-frequency representation based on the noncoherent integration of the short-time Fourier transform (STFT) on which the detection system and the encoder Work. The encoder includes robust frequency estimation, automatic modulation recognition, and clustering, to handle broadband and simultaneous signals and to prevent out-of-channel detections (a typical phenomenon in channelized receivers). The receiver has been evaluated for a wide range of signals and shows a good performance in terms of detection, estimation, and processing of simultaneous signals.. Signals collected from real-life systems and synthetic signals have been utilized.