An Overview of Smart Antennas and Its Techinques Beamforming and Diversity
نویسندگان
چکیده
Smart antennas are systems attract lot attentions now and believably more in the future, as it can increase the capacity of mobile communication systems dramatically. Design of smart antenna systems combines the technologies of antenna design, signal processing, and hardware implementation. : A smart antenna is therefore a phased or adaptive array that adjusts to the environment. That is, for the adaptive array, the beam pattern changes as the desired user and the interference move; and for the phased array the beam is steered or different beams are selected as the desired user moves. The early smart antenna systems were designed for use in military applications to suppress interfering or jamming signals from the enemy. The proposed research work gives us an overall view of basic smart antennas and its techniques.
منابع مشابه
Analog smart antennas: an overview
Analog approaches are expected to offer dramatically low power consumption in smart antennas, especially for battery-operated wireless terminal devices. This paper overviews recently developed analog antenna techniques for smart beamforming. Hardware architectures, trainedand blind-control criteria, and adaptation algorithms are introduced along with state-of-the-art devices and a practical exp...
متن کاملIST - 4 - 027756 WINNER II D 4 . 7 . 3 v 1 . 0 Smart antenna based interference mitigation
In this deliverable, smart antenna based interference mitigation methods for WINNER are presented. These methods include beamforming techniques, transmit diversity techniques, and receive diversity and spatial interference suppression techniques. The methods are investigated in terms of what requirements they put on the system, and the performance they can achieve are assessed by means of compu...
متن کاملPerformance Analysis of Direction of Arrival Estimation Algorithms in Smart Antennas
The goal of this paper is to give a brief overview on smart antennas, before analyzing some popular algorithms from this domain in MATLAB and providing simulation results(especially a parametric study of the algorithms), in order to enhance understanding of the possibilities, but also the limitations of these algorithms. The main focus is on Direction of Arrival (DOA) algorithm called beamformi...
متن کاملLayer 2 Path Selection Protocol for Wireless Mesh Networks with Smart Antennas
In this thesis the possibilities of smart antenna systems in wireless mesh networks are examined. With respect to the individual smart antenna tradeoffs, a routing protocol (Modified HWMP, MHWMP) for IEEE 802.11s mesh networks is presented, that exploits the full range of benefits provided by smart antennas: MHWMP actively switches between the PHY-layer transmission/reception modes (multiplexin...
متن کاملBeamforming in 3G and 4G Mobile Communications: The Switched-Beam Approach
The technology and deployment of modern mobile communications systems, should adapt to the continuous and rapid growth of wireless data traffic. Besides the increase in bandwidth, the addition of cell sites and sectors, and the enhancement of air interface capabilities, smart antennas play also a substantial role in the improvement of wireless systems’ performance. When we refer to smart antenn...
متن کامل