Uplink Carrier-to-Interference Improvement in a Cellular Telecommunication System When a Six-Beam Switched Parasitic Array Is Implemented

Abstract

Abstract-Mobile broadband communication is experiencing rapid growth in the following sections: technology, range of services and marketing target groups. This growth has driven research and development activities towards advanced high-data-rate wireless systems, with improved network performance. A typical example of technology thrust in wireless communications is the use of adaptive antennas at the transceivers, in association with advanced array signal processing. Although the mass deployment of adaptive array systems has not achieved the desired levels yet, there are many examples of improved cell coverage, link quality and system capacity at several networks. The performance of a six-beam switched parasitic array, in terms of carrier-to-interference ratio (CIR) measurement at the uplink direction, is presented in this paper. The switched parasitic array is designed with the aid of the method of genetic algorithms and the simulation results are compared with respect to those obtained when an omni directional antenna is used instead. The calculated CIR improvement reveals the superiority of the adaptive system compared to the conventional one.

CIR improvement in a cellular mobile system using beamforming and power control

“…For further improvement in network capacity antenna beamforming technique can also be used. By using beam forming technique cochannel 978-1-4244-7578-0/$26.00 © 2010 IEEE 294 interference can be minimized to large extent and hence network capacity of the system can also be increased [4]. Beamforming control is most beneficial technique for all access schemes like TDMA, FDMA, CDMA and SDMA.…”

Optimal Design of Switchable Wearable Antenna Array for Wireless Sensor Networks

“…The radiation pattern of the array for a given number of elementary antennas and their spatial arrangement depends on the phase relationship at the antenna feed points, which follows from the phase shift in each elementary antenna feeding path. Signal-to-interference ratio (SIR) can be improved by forming the radiation pattern to direct the maximum gain of the array towards the signal and the minimum towards the interference [6,9] (see Figure 1b)-with constraints on the radiation pattern following from the array design. Phase switching can be automatically performed during system operation to improve the quality of transmission.…”

A Schematic for Broadband Beam Formation Using Time-Delay Technique

“…Various research papers [2][3][4][5][6][7][8][9][10][11][12][13] and [17][18][19][20][21][22][23][24][25][26][27] are dedicated for single beam and multiple beamforming methods. Among them one of the most popular method is Butler matrix [2] beam former (after J. L. Butler, 1961), which reduces the number of elements in the beam forming network and generates multiple orthogonal beams.…”