  The inadequate adaptability to flexible interference scenarios remains an
unresolved challenge in the majority of techniques utilized for mitigating
interrupted-sampling repeater jamming (ISRJ). Matched filtering system based
methods is desirable to incorporate anti-ISRJ measures based on prior ISRJ
modeling, either preceding or succeeding the matched filtering. Due to the
partial matching nature of ISRJ, its characteristics are revealed during the
process of matched filtering. Therefore, this paper introduces an extended
domain called the waveform domain within the matched filtering process. On this
domain, an adaptive matched filtering model, known as the waveform-domain
adaptive matched filtering (WD-AMF), is established to tackle the problem of
ISRJ suppression without relying on a pre-existing ISRJ model. The output of
the WD-AMF encompasses an adaptive filtering term and a compensation term. The
adaptive filtering term encompasses the adaptive integration outcomes in the
waveform domain, which are determined by an adaptive weighted function. This
function, akin to a collection of bandpass filters, decomposes the integrated
function into multiple components, some of which contain interference while
others do not. The compensation term adheres to an integrated guideline for
discerning the presence of signal components or noise within the integrated
function. The integration results are then concatenated to reconstruct a
compensated matched filter signal output. Simulations are conducted to showcase
the exceptional capability of the proposed method in suppressing ISRJ in
diverse interference scenarios, even in the absence of a pre-existing ISRJ
model.
