In recent years, several smart antenna systems have been proposed and demonstrated at the base station (BS) of wireless communications systems, and these have shown that significant system performance improvement is possible. In this paper, we consider the use of adaptive antennas at the BS and mobile stations (MS), operating jointly, in combination with orthogonal frequency-division multiplexi...

In this paper, the feasibility of co-channel coexistence of Time DivisionSynchronous Code Division Multiple Access ( TD-SCDMA ) and Code Division Multiple Access 2000(CDMA2000)systems operating in a macro cell environment is investigated. The deterministic analysis and simulation method are used to evaluate the performance compromising of both systems. Based on a more efficient calculation sche...

Mobile operators commonly use macro cells with traditional wide beam antennas for wider coverage in the cell, but future capacity demands cannot be achieved by using them only. It is required to achieve maximum practical capacity from macro cells by employing higher order sectorization and by utilizing all possible antenna solutions including smart antennas. This paper presents enhanced tessell...

This document presents technical descriptions of signal processing and cross-layer algorithm design for beamforming from high altitude platforms (HAPs) to ground terminals, and vice versa, using advanced antenna types so-called 'smart antennas'. The research covers topics including vertical antenna arrays for communications from HAPs, optimised antenna array beampatterns for cellular coverage f...

Performance Analysis of Adaptive Beamforming Written by Administrator Thursday, 19 May 2011 04:39 Last Updated Thursday, 19 May 2011 04:44 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...

We are concerned with neural network-basedsmart antenna application in direction of arrival estimation.We have separated and presented the types of generalizationsthat the network should be able to perform in this type of aproblem. The basic concept of the network is presented,followed by steering information for detailed analyze. Usingcomputer simulations, the suitable ...

The 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 tracks the mobile user more efficiently by directing the main beam towards the user and forming nulls in the directions of the interfering signal. Smart antennas include the design of antenna array and adjusting the inco...

Field-programmable gate arrays (FPGAs) are drawing ever increasing interest from designers of embedded wireless communications systems. They outpace digital signal processors (DSPs), through hardware execution of a wide range of parallelizable communications transceiver algorithms, at a fraction of the design and implementation effort and cost required for application-specific integrated circui...