Fabbryccio A. C. M. Cardoso

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An adaptive multi-target space-time downlink receiver for user terminals of WCDMA systems under soft handoff is presented. The receiver consists of M antennas and K array processors, each one followed by a chip-rate equalizer and a despreader. The resulting K signals are combined in an “adaptive ratio combiner” which is updated by pilot common channel(More)
This paper presents an adaptive multi-target spacetime architecture for downlink receivers in the user terminal of WCDMA systems under soft handoff. The receiver consists of M antennas andK array processors, each one followed by a chip-rate equalizer and a despreader. The resulting signals from these K branches are combined in an adaptive ratio combiner(More)
The objective of this paper is to present a generic and extensible access framework architecture for WebLab integration. In this framework each Weblab becomes accessible by means of a preinstalled plug-in. This modular approach makes it possible to add, remove or modify a plug-in, and its corresponding Weblab, without framework recompilation.
This document gives formatting guidelines for authors preparing papers for publication in the International Journal of Emerging Technology and Advanced Engineering The authors must follow the instructions given in the document for the papers to be published. Keywords—Keyword are your own designated keyword which can be used for easy location of the(More)
This paper deals with architectural and practical design aspects to estimate the frame misalignment of LTE uplink transmissions on field programmable gate array devices. Timing adjustments are calculated and delivered to the User Equipment in conformance to Long Term Evolution specifications. Performance results as well as amount of resources necessary for(More)
Long Term Evolution (LTE), a standard developed by the 3rd Generation Partnership Project (3GPP), is currently the 4G mainstream technology, providing technology convergence for this generation of cellular communication systems. LTE networks promise data transmission rates of 100 Mbps in the downlink channel. For this high throughput it needs to optimize(More)
Random Access is an important aspect of mobile systems where multiple users are always competing for resources. However, noise imposes a significant problem to those systems causing them to falsely detect access requests. In consequence, unnecessary processing and air traffic are generated based upon these unreal request events. This paper presents a(More)
This paper presents a configurable and optimized hardware architecture for computing Zadoff-Chu (ZC) complex sequences in the frequency domain. It is a hardware-efficient and accurate architecture for computing ZC sequences in realtime. The architecture is mainly based on the CORDIC algorithm for computing complex exponentials using only shift and add(More)