An Improved Algorithm of Digital Beam Anti-jamming Based on Adaptive Side-lobe Cancellation
In allusion to the problem of high equipment complexity and signal-to-noise degradation of desired signal in adaptive anti-jamming processing of digital array radar,an improved algorithm of digital beam anti-jamming is investigated.The algorithm analyses the problem of space resource occupancy caused by separate design of auxiliary antenna,it optimizes the array resource design and in-creases the correlations between desired signal and jamming,in order to improves the jamming-cancellation ratio by choosing the aux-iliary antenna elements in the digital array flexibly.It decreases the energy of desired signal in auxiliary beam and solves the problem of desired signal cancellation due to signal in auxiliary beam autocorrelation matrix by pre-weighting to auxiliary signal according to minimum mean square error criteria.The effectiveness of this algorithm is proved in the system test,and the result shows that it has achieved 51.6 dB on jamming nulling depth,with only 0.65 dB loss of signal-to-noise ratio while simplifying the design of antenna array.It solved the problem of efficiency degradation in ASLC algorithm and has a broad engineering application prospects.
minimum mean square error(MMSE)adaptive side-lobe cancellation(ASLC)digital beam anti-jamming
国家科技期刊平台
NSTL
万方数据
