國立虎尾科技大學 |

Polarized Beamforming for Enhanced Countermeasure Against Interference in Wireless Systems.

紀錄類型:	書目-語言資料,手稿 : Monograph/item
正題名/作者:	Polarized Beamforming for Enhanced Countermeasure Against Interference in Wireless Systems./
作者:	Aldarraji, Ali.
面頁冊數:	1 online resource (90 pages)
附註:	Source: Dissertation Abstracts International, Volume: 78-10(E), Section: B.
標題:	Electrical engineering. -
電子資源:	click for full text (PQDT)
ISBN:	9781369815665

Polarized Beamforming for Enhanced Countermeasure Against Interference in Wireless Systems.
Aldarraji, Ali.

Polarized Beamforming for Enhanced Countermeasure Against Interference in Wireless Systems. - 1 online resource (90 pages)

Source: Dissertation Abstracts International, Volume: 78-10(E), Section: B.

Thesis (Ph.D.)--Tennessee State University, 2017.

Includes bibliographical references

Wireless communications are a revolution in the information era but they are vulnerable to jamming and interference in general from other wireless signals. Beamforming is a promising technique to counteract the impact of jamming attacks. However, when the direction of the desired signal is close to that of the jamming signal, the performance of the traditional anti-jamming beamformer is significantly degraded due to the indistinguishable signals and interferences in space domain. Polarized beamforming has been proposed to solve this problem by filtering interference from the desired signal in both space and polarization domain. However, existing work only considered far-field radiation region of the signal by assuming that the transmitter and the receiver are far apart while near-field wireless communications have been employed in more and more applications. In this dissertation, an enhanced countermeasure method for mitigating jamming attacks in the near-field and far-field radiation regions has been proposed by using the polarized beamforming with planar arrays. The analytical expressions of the steering vectors is derived for near-field propagation. The steering vectors for far-field is shown to be an approximation of that of near-field. The beamformer is designed by using the Linearly Constrained Minimum Variance (LCMV) criterion. Simulations are conducted for beam pattern and Bit Error Rate (BER) to show a significant performance improvement of the proposed anti-jamming system even when the desired signals and interferences are coming from the same direction.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2018

Mode of access: World Wide Web

ISBN: 9781369815665Subjects--Topical Terms:

596380
Electrical engineering.
Index Terms--Genre/Form:

554714
Electronic books.

Polarized Beamforming for Enhanced Countermeasure Against Interference in Wireless Systems.
LDR:02764ntm a2200325K 4500 001 912523
005 20180608112132.5
006 m o u
007 cr mn||||a|a||
008 190606s2017 xx obm 000 0 eng d
020 $a 9781369815665
035 $a (MiAaPQ)AAI10266797
035 $a (MiAaPQ)tnstate:11062
035 $a AAI10266797
040 $a MiAaPQ $b eng $c MiAaPQ
100 1 $a Aldarraji, Ali. $3 1184924
245 1 0 $a Polarized Beamforming for Enhanced Countermeasure Against Interference in Wireless Systems.
264 0 $c 2017
300 $a 1 online resource (90 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
338 $a online resource $b cr $2 rdacarrier
500 $a Source: Dissertation Abstracts International, Volume: 78-10(E), Section: B.
500 $a Adviser: Liang Hong.
502 $a Thesis (Ph.D.)--Tennessee State University, 2017.
504 $a Includes bibliographical references
520 $a Wireless communications are a revolution in the information era but they are vulnerable to jamming and interference in general from other wireless signals. Beamforming is a promising technique to counteract the impact of jamming attacks. However, when the direction of the desired signal is close to that of the jamming signal, the performance of the traditional anti-jamming beamformer is significantly degraded due to the indistinguishable signals and interferences in space domain. Polarized beamforming has been proposed to solve this problem by filtering interference from the desired signal in both space and polarization domain. However, existing work only considered far-field radiation region of the signal by assuming that the transmitter and the receiver are far apart while near-field wireless communications have been employed in more and more applications. In this dissertation, an enhanced countermeasure method for mitigating jamming attacks in the near-field and far-field radiation regions has been proposed by using the polarized beamforming with planar arrays. The analytical expressions of the steering vectors is derived for near-field propagation. The steering vectors for far-field is shown to be an approximation of that of near-field. The beamformer is designed by using the Linearly Constrained Minimum Variance (LCMV) criterion. Simulations are conducted for beam pattern and Bit Error Rate (BER) to show a significant performance improvement of the proposed anti-jamming system even when the desired signals and interferences are coming from the same direction.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2018
538 $a Mode of access: World Wide Web
650 4 $a Electrical engineering. $3 596380
650 4 $a Communication. $3 556422
655 7 $a Electronic books. $2 local $3 554714
690 $a 0544
690 $a 0459
710 2 $a ProQuest Information and Learning Co. $3 1178819
710 2 $a Tennessee State University. $b Electrical & Computer Engineering. $3 1184925
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10266797 $z click for full text (PQDT)