Advanced multi-antenna techniques, such as multiuser MIMO (MU-MIMO) and cooperative transmission are known to increase system performance in cellular deployments. However, it is well known that cellular systems suffer from multicell interference. Antenna downtilt is a common method used to adjust interference conditions especially in urban scenarios with a high base station density. Performance...

The techniques used in GSM networks for mobile station localization typically use several methods with different level of granularity, based on the base network parameters such as Cell Identification, Timing Advance, the position of Base Transceiver Station, the parameters of Base Transceiver Station antenna etc. This article introduces several others parameters that can be used for network des...

The rapid growth in the number of users of mobile communications means that many operators must find new ways of increasing the capacity of their networks. Their options include allocating more frequency, introducing frequency-hopping techniques, and adding microcells and adaptive antenna systems. The introduction of new frequency bands at 1800 and 1900 MHz is an example of allocating frequency...

The current wireless cellular base station antenna system employs switched beam technology which suffers from its inefficiency to track the user and limited capacity. The Smart antenna technology which tracks the mobile user continuously by steering the main beam towards the user and at the same time forming nulls in the directions of the interfering signal. The development of smart antennas in...

This paper presents the gain improvement of a sector antenna for mobile phone base station by using the new technique to enhance its gain for microstrip antenna (MSA) array without construction enlargement. The curved woodpile Electromagnetic Band Gap (EBG) has been utilized to improve the gain instead. The advantages of this proposed antenna are reducing the length of MSAs array but providing ...

• Great Duck Island [SMP04]. Szewczyk et al. have used two sensor patches, gateways, base station and satellite WAN link for their experiments. A gateway node interfaces a sensor patch to the base station and consists of a mote with 14dBi high gain yagi antenna (point-to-point, directional). The base station collects the data from the sensor patches in the database and makes the data available ...

During the last two decades, the number of macrocell mobile telephony base station antennas emitting radiofrequency (RF) electromagnetic radiation (EMR) in residential areas has increased significantly, and therefore much more attention is being paid to RF EMR and its effects on human health. Scientific field measurements of public exposure to RF EMR (specifically to radio frequency radiation) ...

Abstract: In this paper, experimental investigations are performed to compare different MIMO antenna configurations at the mobile and base stations. The goal is to provide new information on the effects of antenna properties on MIMO performance. At the mobile station, the effect of using different elements in arrays is studied. Further, at the base station, the effects of increasing the number ...

In this paper, we are concerned with the performance at the media access control (MAC) layer of the protocol stack when multibeam adaptive antenna arrays are employed at the base station site. Specifically, we analyze the performance of slotted ALOHA when the base station receiver uses multibeam antenna arrays capable of steering the beams selectively on smaller sectors. The effect of different...