Multiple-input-multiple-output (MIMO) technology has become an integral part of wireless systems nowadays. This technology depends on the use of multiple antenna elements at the mobile terminal as well as the base station. The design of compact printed MIMO antenna systems is a challenging task specially when it is made for small factor mobile terminals. The introduction of MIMO brought with it...

This paper presents a new dual-band, dual-polarized 1×4 antenna array design for telecommunication base station. One of the bands covers global system for mobile communication (GSM) band, while the other covers both digital communication system (DCS) and universal mobile telecommunication system (UMTS) bands. The antenna is based upon an aperture stacked patch layout and incorporates a simple a...

A compact dual-band dual-polarized antenna is proposed in this paper. The two pair dipoles with strong end coupling are used for the lower frequency band, and cross-placed patch dipoles are used for the upper frequency band. The ends of the dipoles for lower frequency band are bent to increase the coupling between adjacent dipoles, which can benefit the compactness and bandwidth of the antenna....

DS-CDMA[1] is being investigated for the next generation mobile communication system. In DS-CDMA, to distinguish one user’s transmission from another, each mobile terminal modulates the information data symbols by a pseudo-noise(PN) code and the strong point of this system is that it can easily realize the multi-rate transmission. On the other hand, the transmission power increases in proportio...

An antenna selection based initial ranging method is proposed in orthogonal frequency division multiple access (OFDMA) networks with multiple-input multiple-output (MIMO) for IEEE 802.16m standard. In the proposed scheme, the initial ranging signal processing is selected by the antenna selection at the base station, where the receive antenna with the largest received signal-to-interference-and-...

A rigorous analysis method is provided for a rectangular slot antenna loaded by a dielectric hemisphere with double dielectric coatings. The method is an integral equation approach and the moment method solution is sought. The antenna input impedance and radiation patterns are obtained and compared with the case with a single dielectric coating layer. The bandwidth of the antenna is found to be...

ABSTRACT The paper presents design of a 2×2 multiple input multiple output (MIMO) LTE Downlink using OFDM with 16-QAM scheme, operated in a spatial Multiplexing (SM) mode. An urban Microcell Winner channel model is assumed to investigate the performance of the system. The focus of this paper is to understand the effect of antenna spacing of end transceivers on the performance of 2×2 MIMO LTE Do...