Abstract
The processing of coherent-pulse radar signals in the presence of passive interference is considered on the basis of simplified versions of the likelihood ratio. The aim of the work is to synthesize and analyze algorithms and systems for processing coherent pulse signals that are invariant to the Doppler phase shift of the signal over the period of repetition of probing pulses. The integration of the first variant of the simplified truth-similarity relation leads to a system with a single-channel coherent accumulation of pairwise products of the results of adaptive matrix or vector processing. The second variant of the simplified likelihood ratio directly corresponds to the incoherent accumulation of the matrix or vector filter output samples. The structural diagrams of single-channel joint detection-measurement systems based on adaptive matrix and notch filters are presented. The systems were compared by the threshold signal-to-noise ratio using the computer simulation method. It is established that in comparison with the optimal processing system, the losses of the corresponding system due to the single-channel accumulation are an acceptable value.
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