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Description: An adap tive multip le beamforming algorithm based on D3LS ( direct data domain least squares) app roach is
p resented in this paper, including forward p rocedure, backward p rocedure and forward2backward p rocedure. A single snap2
shot data of the comp lex voltagesmeasured at array elements is used to form the matrix equation, which is solved with the
conjugate gradientmethod to obtain the adap tive weight vector of array. Finally, beams are formed along the DOAs ( direction
of arrival) of SO Is ( signal of interest) and deep nullings are made along the DOAs of interferences to imp rove the SINR ( sig2
nal2to2interference2p lus2noise ratio) greatly. The p roposed algorithm has a lower computation comp lexity than conventional al2
gorithms as it p rocesses only a single snap shot data as opposed to forming the samp le covariance matrix and performingmatrix
inversion operation.
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