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The active adaptive antenna array system
IEEE Transactions on Antennas and Propagation, 1963The active adaptive antenna array system (AAAAS) is a self-focusing antenna array. Phase-lock loop-type circuits are used to automatically adjust the phases of signals received on the elemental antennas of the array so that the received signals can all be added in phase or coherently.
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Adaptive antenna arrays for OFDM systems with cochannel interference
IEEE Transactions on Communications, 1999Orthogonal frequency-division multiplexing (OFDM) is one of the promising techniques for future mobile wireless data systems. For OFDM systems with cochannel interference, adaptive antenna arrays can be used for interference suppression. This paper focuses on a key issue for adaptive antenna arrays, that is, parameter estimation for the minimum mean ...
null Ye Li, N.R. Sollenberger
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IEEE Transactions on Vehicular Technology
Interference cancellation holds great promising to suppress the non-cooperative interference. However, it is usually difficult to obtain an ideal copy of the non-cooperative interference since its statistical characteristics are unknown. A novel adaptive
Zhongpu Cui +5 more
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Interference cancellation holds great promising to suppress the non-cooperative interference. However, it is usually difficult to obtain an ideal copy of the non-cooperative interference since its statistical characteristics are unknown. A novel adaptive
Zhongpu Cui +5 more
semanticscholar +1 more source
A hexagonal antenna array prototype for adaptive system application
The 5th International Symposium on Wireless Personal Multimedia Communications, 2003Adaptive antennas arrays have been recognized as an excellent method to improve the performance of the next generation of wireless communication systems. This work describes the optimization of a novel array prototype with seven patch elements in a hexagonal arrangement.
L.C. Kretly +2 more
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Fixed multibeam antennas versus adaptive arrays for CDMA systems
Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324), 1999We compare the performance of fixed multibeam antennas versus adaptive beamforming for the reverse link of IS-95 systems. A simulation model for analyzing the performance of antenna arrays in a mobile fading environment with closed loop power control is derived and applied to realistic scenarios.
H.J. Xing, J.R. Cruz, null Yiping Wang
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Adaptive beamforming algorithm for OFDM systems with antenna arrays
IEEE Transactions on Consumer Electronics, 2000This paper presents an adaptive beamforming algorithm for an OFDM system with an adaptive array antenna. The proposed algorithm for adaptive beamforming in the OFDM system is derived by (1) calculating the pilot error signals in the frequency domain, (2) transforming the frequency-domain error signals into time-domain error signals, (3) updating the ...
null Chan Kyu Kim +2 more
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Characterization system for radio channel of adaptive array antennas
Proceedings of 8th International Symposium on Personal, Indoor and Mobile Radio Communications - PIMRC '97, 2002This paper describes a multichannel measurement system for the analysis of the radio channel of adaptive array antennas. It provides real-time recording of signals from multiple input channels. Due to this multielement reception, the incidence angles of the received signal components can be resolved.
K. Kalliola, P. Vainikainen
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Problems of implementing adaptive array antennas in CDMA systems
Ninth IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (Cat. No.98TH8361), 2002In this paper, we discuss the performance of a system in which multiprocessing gain (MPG) spread spectrum signals are transmitted to a base station within the same bandwidth. At the receiver of the base station, an adaptive array antenna is employed. We evaluate the system performance in terms of signal to interference-and-noise ratio (SINR) and also ...
A. Morimoto +3 more
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Adaptation of the Wideband System Antenna Array Directional Pattern
2019 International Multi-Conference on Industrial Engineering and Modern Technologies (FarEastCon), 2019The article proposes to control the shape of the antenna array pattern by creating an amplitude-phase distribution at the aperture of the antenna array. In the MatLab environment, a simulation was carried out, confirming the hypothesis that it was possible to adapt the array pattern to specified operating conditions. It has been analytically shown that
A.V. Bazhenov +2 more
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An improved beamformer for OFDM system with adaptive antenna array
Proceedings. 2005 International Conference on Wireless Communications, Networking and Mobile Computing, 2005., 2005In wireless communication system, orthogonal frequency division multiplexing (OFDM) can be used with multiple antennas to achieve both frequency diversity and space diversity. Many methods have been proposed to decide the weight set for beamformer. In this paper, we proposed an improved method to derive the weight set by exploiting the virtual sub ...
null Yu Li +3 more
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