Title :
Some new results of the Gram-Schmidt algorithm in DBF
Author :
Xie, L.-g. ; Jiang, X.-f.
Author_Institution :
Beijing Inst. of Radio Meas., China
Abstract :
Some new results are obtained using the Gram-Schmidt algorithm (GSA) in digital beamforming (DBF). It is noted that the number of snapshot samples must be equal to the number of jammers: otherwise, the pattern nulls cannot be formed in the jammer directions. Both numbers can be determined adaptively. In addition, the amplitude and phase errors existing in each receiver and the GSA itself will affect the null position and depth of the difference pattern in the steering direction. These effects are eliminated in the algorithm described. It is also shown that the nulls in 2-D directions can be achieved by using the GSA in a planar array.<>
Keywords :
antenna phased arrays; antenna radiation patterns; jamming; Gram-Schmidt algorithm; difference pattern; digital beamforming; jammers; null depth; null position; phase errors; planar array; receiver; snapshot samples; steering direction; Adaptive arrays; Array signal processing; Convergence; Equations; Interference; Jamming; Planar arrays; Sampling methods; Transmission line matrix methods;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1991. AP-S. Digest
Conference_Location :
London, Ontario, Canada
Print_ISBN :
0-7803-0144-7
DOI :
10.1109/APS.1991.174784
