The detection and monitoring on multiple 5G base station signals are not only the important guarantee to maintain the normal order of mobile communication, but also the necessary means to ensure the safety in electromagnetic space. According to the beam sweeping characteristics of 5G base station, a distributed multi-antenna detection and processing method is adopted to realize the multi-mode mixed detection on signals overlapped in time-frequency-domain, by Multiple Input Multiple Output (MIMO) signals reconnaissance model, which increases the diversity of reconnaissance channel. Furthermore, it improves the separation and information extraction capability about signals overlapped in time-frequency-domain. Through non-cooperative demodulation and decoding on these signals in different reconnaissance channel, several groups of Physical Cell Identifier (PCI), Master Information Block (MIB) and System Information Block (SIB) can be extracted. Based on information fusion, information of multiple base stations can be obtained. Finally, the experiment is carried out on the actual 5G base stations of China Mobile. The information extraction of multiple 5G base stations is successfully completed, which verifies the effectiveness and correctness of the method. This is suitable for the engineering application of 5G signals reconnaissance.
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Wu et al. (2021) studied this question.