Luis Carlos Carneiro Gonçalves

Unemployed

The ARTHUR project consists of a platform that allows the virtual performance of maxillofacial surgeries, offering, in a photorealistic concept, the possibility for the patient to have an idea of the surgical changes before they are performed on their face. For this, the system brings together several image formats, dicoms and objs that, after load...

Facial expression facilitates the understanding of the individual's identity, being essential for communication and interaction in modern society. When this expression is limited, in addition to the functional consequences of the organism, it also has psychological and social consequences. The ARTHUR project developed a virtual surgery solution, ap...

In this article the complexity and runtime performance of two Multiuser Detectors for Direct Sequence-Code Division Multiple Access were evaluated in two different hardware platforms. The innovation and aim is to take advantage of present parallel hardware to bring Multiuser technology to present and future Base Stations in order to increase the ca...

The aim is to compute the time delay between the set of measurements in each of two or more Spectrum Analyzers using a linear relation between two dimensions (power and time). This method of time measurement implies to input in each Spectrum Analyzer two identical and synchronized Amplitude Shift Keying signals, each one modulated by a square wave...

In this article the complexity and runtime performance of two Multiuser Detectors for Direct Sequence-Code Division Multiple Access were evaluated in two hardware platforms in order of a possible deployment in base stations. The detectors are based on the Frequency Shift Canceller concatenated with a Parallel Interference Canceller. This detector i...

A vertically integrated approach is presented to evaluate the performance of cognitive radio (CR) systems. The approach consists of three pillars: measurement, modeling, and emulation (MME). This integrated approach enables the reproduction of the radio environment in laboratory conditions and aims to guarantee the same performance results as one w...

Direct Sequence Code Division Multiple Access (DS-CDMA) signals exhibit cyclostationary properties which imply redundancy between frequency components separated by multiples of the symbol rate. In this paper a Multiple Access Interference (MAI) Canceller (Frequency Shift Canceller (FSC)) that explores this property is presented. The linear frequenc...

Direct sequence code division multiple access (DS-CDMA) signals exhibit cyclostationary properties which imply a redundancy between frequency components separated by multiples of the symbol rate. In this paper a multiple access interference canceller (frequency shift canceller) that explores this property is presented. This linear frequency domain...

Direct-sequence spread spectrum (DS-SS) signals exhibit cyclostationary properties which imply a redundancy between frequency components separated by multiples of the symbol rate. In this paper we present a multiple access interference canceller that explores this property and applies to UMTS-TDD. This linear frequency domain canceller operates in...

Direct Sequence Spread Spectrum (DS-SS) signals exhibit cyclostationary properties which imply a redundancy between frequency components separated by multiples of the symbol rate. In this paper we present a Multiple Access Interference Canceller that explores this property and applies to UMTS-TDD. This frequency domain canceller operates in the spr...

Direct sequence spread spectrum (DS-SS) signals exhibit cyclostationary properties which imply a redundancy between frequency components separated by multiples of the symbol rate. In this paper we present a multiple access interference canceller that explores this property and applies to UMTS-TDD This frequency domain canceller operates in the spre...

The cyclostationary properties of direct sequence spread spectrum signals are well known. These cyclostationary properties imply a redundancy between frequency components separated by multiples of the symbol rate. We present a multiple access interference canceller that explores this property and applies it to UMTS-TDD. This frequency domain cancel...

The cyclostationary properties of Direct Se- quence Spread Spectrum signals are well known. These cy- clostationary properties imply a redundancy between fre- quency components separated by multiples of the symbol rate. In this paper we present a Multiple Access Inter- ference Canceller that explores this property and apply to UMTS-TDD. The results...

This communication describes the architecture and development of link level evaluation platform intended to evaluate advanced signal processing schemes for the Universal Mobile Telecommunications System (UMTS), Time Division Duplex (TDD), Up Link (UL) mode. It starts with the architecture design, then outlines the main aspects of the used advanced...

This paper presents the authors contribution to the work performed in the ASILUM project. It describes the development of a link level simulation platform that includes advanced space-time multiuser detection for the TDD mode of UMTS. The receiver comprises two main units, a spatial processing unit and a multiuser detection unit. The former tries t...