00000000nam 2200000zi 4500
0019.954303
003CaOODSP
00520250917151153
006m     o  d f      
007cr bn|||||||||
008250820e199512  oncad    bt  f000|| eng |
040 |aCaOODSP|beng|erda|cCaOODSP
041 |aeng|beng|bfre
043 |an-cn---
0861 |aDR52-17/72-1995E-PDF
1001 |aToulgoat, Mylène, |d1964- |eauthor.
24510|aEstimation of target angular position under mainbeam jamming conditions (U) / |cby Mylène Toulgoat and Ross M. Turner.
264 1|aOttawa : |bDefence Research Establishment Ottawa, |cDecember 1995.
300 |a1 online resource (xii, 52 pages) : |billustrations, charts.
336 |atext|btxt|2rdacontent
337 |acomputer|bc|2rdamedia
338 |aonline resource|bcr|2rdacarrier
4901 |aDREO report ; |vno. 1281
500 |aDigitized edition from print [produced by Defence Research and Development Canada].
500 |a"PCN 01A01."
504 |aIncludes bibliographical references (pages 24-25).
520 |a"A phased-array multifunction radar (MFR) with an agile pencil beam will invariably employ a monopulse system for precise angle measurement. Such a monopulse system has three receiver channels, one channel for each of the sum, azimuth and elevation difference beamformers. This report considers a modest expansion of the number of receiving channels from three to five channels. The five channels comprise the sum channel beamformer and each half of the two difference beamformers. These five channels form an adaptive array which can be used to provide mainbeam nulling of jammers. A new algorithmic approach to mainbeam jammer nulling and target angle estimation is applied to this five-element adaptive array. With this algorithm, the jammer subspace is first evaluated by sampling at ranges where the target is absent (e.g. beyond the maximum range of targets or during a quiet period when the radar is not transmitting). Data vectors are then processed to remove the jammer thus allowing the target to be detected. Finally, a high resolution technique, Multiple Signal Classification (MUSIC), is used to estimate the target Direction-Of-Arrival (DOA) from the processed data vectors. The model used in the MUSIC technique takes into account the fact that the jammer has been cancelled in the target data vector. The performance of this algorithm is evaluated through simulations and compared with Corrected Adaptive Monopulse (CAM) [3,4] for a typical X-band phased array. The new algorithm provides more accurate estimates than CAM when the target is close to the jammer, at the expense of large computational load."--Abstract, page iii.
546 |aIncludes abstracts in English and French.
650 0|aRadar |xInterference.
650 6|aRadar|xBrouillage.
7102 |aDefence Research Establishment Ottawa, |eissuing body.
830#0|aDREO report ;|vno. 1281.|w(CaOODSP)9.941661
85640|qPDF|s1.89 MB|uhttps://publications.gc.ca/collections/collection_2025/rddc-drdc/DR52-17-72-1995-eng.pdf
986 |aPCN 01A01