  Radar signal deinterleaving has been extensively and thoroughly investigated
in the electronic reconnaissance field. In this work, a new radar signal
multiparameter-based deinterleaving method is proposed. In this method,
semantic information composed of the pulse repetition interval (PRI), pulse
width (PW), radio frequency (RF), and pulse amplitude (PA) of a radar signal is
used to deinterleave radar signals. A bidirectional gated recurrent unit (BGRU)
is employed, and the difference of time of arrival (DTOA)/RF, DTOA/PW, and
DTOA/PA of the pulse stream are input into the BGRU. Based on the semantic
information contained in different radar signal types, each pulse in the
obtained pulse stream is classified according to the semantic information
category, and the radar signals are deinterleaved. Compared to the PRI-based
deinterleaving methods, the proposed method utilizes the multidimensional
information of radar signals. As a result, higher deinterleaving accuracy is
achieved. Compared to other existing radar signal multiparameter-based
deinterleaving methods, the proposed method can adapt to radar signals with
complex parameter features as well as to complex signal environments, and can
complete the use of multiparameter in one step.
