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A method for joint Direction of Arrival (DOA) and frequency estimation based on the Direct Data Domain (DDD-JDFE) is proposed. This algorithm, designed to work within an array antenna reception system, utilizes space-time adaptive processing techniques to acquire short-term samples through both spatial and temporal smoothing. It employs a broadband array direction-finding system to simultaneously determine the frequency and arrival direction of targets. Compared to traditional spatial-domain array signal processing methods, this approach provides improved direction-finding performance, particularly at low signal-to-noise ratios. Meanwhile, it shows great potential for long-distance signal detection, and simulation results have verified the effectiveness of the method.
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1 School of Information and Communication, Guilin University of Electronic Technology, Guilin 541004, China; [email protected] (R.W.);, Guangxi Engineering Research Center for Intelligent Electromagnetic Spectrum Sensing and Control Technology, Guilin 541001, China
2 Guangxi Engineering Research Center for Intelligent Electromagnetic Spectrum Sensing and Control Technology, Guilin 541001, China
3 School of Information and Communication, Guilin University of Electronic Technology, Guilin 541004, China; [email protected] (R.W.);