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Typically, geometrically symmetric 2-port Multiple Input - Multiple Output (MIMO) antennas for LTE-enabled small mobile wireless devices feature radiation modes with significantly different radiation quality factors. It is difficult to precisely match radiation modes over the desired frequency band. Therefore, a solution for low-loss electrical tuning is of interest. The new solution, reported in...
Spectrum sharing has been recently proposed as a promising paradigm to improve the efficiency of resource usage in next generation mobile networks. In particular, non orthogonal spectrum sharing allows the operators to re-use the available frequencies at the cost of higher interference at the receivers. In this paper, we mathematically analyze the performance of this technique and how it is statistically...
Long Term Evolution (LTE) is an emerging 4G wireless access technology. Multiple-Input Multiple-Output (MIMO) systems are a primary enabler of the high data rate sought to be achieved by LTE. Closed-Loop-Spatial-Multiplexing and Open-Loop-Spatial-Multiplexing are the two primary MIMO transmission modes used in the LTE downlink. An LTE Base Station (eNodeB) is expected to select and switch transmission...
Fourth Generation (4G) is the evolving mobile technology, supporting up to 1 Gbit/s bandwidth for fixed gadgets and 100 Mbit/s for mobiles, and is reported to be more secure than 3G and 4G. Also supports IPv6 in addition to many added features. Content Delivery Networks (CDN) is the technology deployed for good quality as well as speedy access to the content as it overcomes flash crowd, denial of...
Closed-loop transmission combined with MIMO (multiple-input multiple-output) and OFDM (orthogonal frequency division multiplexing) technologies have drawn most attentions during development of the 4G systems (fourth generation of mobile communication systems). In LTE (Long Term Evolution) and LTE-Advanced systems, which are proposed by 3GPP (Third Generation Partnership Project) to be the most competitive...
To estimate speed of a moving user transmitting data over a single input single output (SISO) Rayleigh fading channels, many autocorrelation function (ACF) based schemes have been presented in literature. It was shown that in a multiple input multiple output (MIMO) channel with N antennas on each side, the velocity of a moving mobile can be obtained by applying the ACF based velocity estimation schemes...
REMON is the Israeli 4G consortium of wireless communication and after five years of R&D activity will perform a field test at the beginning of 2010. The consortium developed the MIMO-OFDMA and other technologies to increase the capacity of cellular networks 100 times. The paper describes the goals and technical achievements in industrial companies and academic institutes.
Next generation mobile technologies must provide the throughput and QoS (quality of service) required for dasiatriple playpsila voice, data and media services. Novel applications are required that fully exploit the capabilities of new technology in a spectrally efficient and cost-effective manner. This paper exploits measured and simulated data to determine the range and throughput of mobile WiMAX...
With the rapid growth of user demands, and the limitations of third generation (3G) mobile communication systems, it is expected that fourth generation (4G) mobile systems are likely to reach the consumer market in another 4-5 years. 4G systems are expected to become a platform capable of providing increased bandwidth, higher data rates, and greater interoperability across communication protocols,...
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