Results 271 to 280 of about 40,023 (305)
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Partial adaptive nulling on a monopulse phased array antenna system
IEEE Transactions on Antennas and Propagation, 1992A partial phase-only nulling (PPON) algorithm has been developed and evaluated on a 496-element monopulse phased array antenna system which employs five-bit phase shifters. Using this PPON algorithm allows nulls in the far-field pattern to be steered to the desired directions for a phased array equipped with low-resolution phase shifters to perform ...
D.-C. Chang, K.-T. Ho, C.-I. Hung
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Adaptive antenna array for dect system
2020oz DECT SİSTEMİ İÇİN UYARLANABİLEN ANTEN DİZİSİ Özgün, Serkan Yüksek Lisans, Elektrik ve Elektronik Mühendisliği Bölümü Tez Yöneticisi: Prof. Dr. Yalçın Tanık Aralık 2000, 97 sayfa Bu çalışmada, baz istasyonunda anten dizisi bulunan bir 'Digital European Cordless Telecommunications' (DECT) sisterninin performansı bilgisayar benzetimleri ...
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Combined adaptive interference cancellation with antenna array for CDMA systems
Globecom '00 - IEEE. Global Telecommunications Conference. Conference Record (Cat. No.00CH37137), 2002We combined the multistage adaptive parallel interference canceller with an antenna array. Two combination schemes are proposed. In the first approach, interference cancellation is performed at each element of the antenna followed by beamforming. The second method reduces the complexity by carrying out beamforming first. The output of the beamformer is
Y. Dai, G. Xue, T. Le-Ngoc, J. Weng
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Single-Carrier Frequency Domain Adaptive Antenna Array for Cellular Systems
2010 IEEE 72nd Vehicular Technology Conference - Fall, 2010In this paper, a single-carrier frequency domain adaptive antenna array (FDAAA) is proposed for the uplink transmission in cellular systems. The FDAAA algorithm will deal with co-channel interference and exploit the frequency selectivity of the channel fading jointly by using adaptive antenna array in the frequency domain.
Wei Peng, Fumiyuki Adachi
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Outage probability for CDMA cellular system with adaptive antenna array
VTC2000-Spring. 2000 IEEE 51st Vehicular Technology Conference Proceedings (Cat. No.00CH37026), 2002The uplink and downlink capacity for a CDMA system with an adaptive antenna array is analyzed when an angle estimation error is present. For the modulation and spreading schemes, dual channel BPSK with complex spreading in the uplink and QPSK with quadriphase spreading in the downlink are employed as in the asynchronous W-CDMA system.
null Young Mo Chung, G.L. Stuber
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An FDM concept for GPS adaptive array antenna system
IEEE 60th Vehicular Technology Conference, 2004. VTC2004-Fall. 2004, 2005Adaptive array antenna systems have been widely used for GPS receivers for antenna beamforming and nulling. However the conventional technique requires several analog-to-digital-converter (ADC) and digital signal processing paths to achieve high performance GPS tracks in interference rich environments. This paper describes a new technique for a digital
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Multiuser detection for DS/CDMA systems with adaptive antenna array
Proceedings of IEEE. IEEE Region 10 Conference. TENCON 99. 'Multimedia Technology for Asia-Pacific Information Infrastructure' (Cat. No.99CH37030), 2003Recently, the study on adaptive antenna array systems has been investigated to combat multiple access interference for CDMA systems. An adaptive antenna array can cancel out an undesired signal using beamforming. However, if there interfering signals from undesired users with the same arrival angle as that of a desired user, an adaptive antenna array ...
null Jong Won Park +2 more
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Performance of a simulcast radio system using adaptive antenna array
Proceedings of IEEE. IEEE Region 10 Conference. TENCON 99. 'Multimedia Technology for Asia-Pacific Information Infrastructure' (Cat. No.99CH37030), 2003This paper introduces the multiple transmission links between a mobile and ports by using the adaptive antenna array. A simulcasting technique can be used to establish the multiple transmission link in uplink and downlink. When the multipath channel environment between mobiles and ports changes dynamically the transmission power and the weighting ...
null Sung-Kyo Jung +2 more
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Comparative Study of Adaptive Antenna Arrays in CDMA Communication Systems
1997In this paper adaptive algorithms that may be used for spatial filtering or spatio-temporal filtering in a direct sequence code division multiple access (DS-CDMA) communication system are compared on the basis of signal-io-interference-and-noise-raiio (SINE,) improvements, algorithm convergence rates, capacity enhancement, and computational complexity.
Richard B. Ertel, Stephan V. Schell
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Adaptive Antenna Arrays for Satellite Personal Communication Systems
2014Master of ...
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