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  • Rodrigo B. Moraes
Rodrigo B. Moraes

Rodrigo B. Moraes
Pulsify Medical

PhD

About

22
Publications
5,374
Reads
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168
Citations
Citations since 2016
0 Research Items
93 Citations
201620172018201920202021202205101520
201620172018201920202021202205101520
201620172018201920202021202205101520
201620172018201920202021202205101520
Additional affiliations
January 2020 - present
Pulsify Medical
Position
  • Researcher
January 2016 - December 2020
Huawei Technologies
Position
  • Engineer
February 2014 - October 2015
Alcatel-Lucent Bell Labs
Position
  • Engineer

Publications

Publications (22)
Article
Full-text available
In this paper, we treat the combined signal and spectrum coordination problem in digital subscriber line (DSL) networks with linear design for transmitters and receivers. The transmission is modeled as a multitone MIMO system where each user has a number of transceivers and there is coordination between sets of users on the transmitter and on the r...
Article
Full-text available
Theoretical research has demonstrated that the achievable gains in data rate with dynamic spectrum management, i.e., signal coordination or spectrum coordination, are substantial for digital subscriber line (DSL) networks. Work on these two fronts has progressed steadily and, more often than not, independently. In this paper, we combine the two typ...
Article
Full-text available
The use of a feedback link in wireless orthogonal frequency division multiplexing (OFDM) systems is analysed. Although open-loop scenarios have been rigorously investigated in the literature, closed-loop scenarios, in which there is a feedback link from a strong to a weak user, have not been thoroughly studied. The study mainly focus on the recentl...
Article
Full-text available
Digital subscriber lines (DSLs) technology is vastly used for high-speed data transmission. Crosstalk is one of the main problems in DSL. The research community has done extensive work on how to optimize spectrum allocation across DSL frequencies and mitigate crosstalk, a subject that has been called dynamic spectrum management (DSM). This text pre...
Article
Full-text available
Traditionally, copper network operators complement a fiber-to-the-home (FTTH) strategy with a hybrid fiber-copper deployment in which fiber is gradually brought closer to the consumer, and digital subscriber line (DSL) technology is used for the remaining copper network. In this article we propose the system concepts of XG-FAST, the 5th generation...
Conference Paper
Full-text available
Traditionally, copper network operators complement a Fiber-to-the-Home (FTTH) strategy with a hybrid fiber-copper deployment in which fiber is gradually brought closer to the consumer, and Digital Subscriber Line (DSL) technology is used for the remaining copper network. In this paper, we propose the system concepts of XG-FAST, a technology capable...
Article
Full-text available
Multiuser interference, i.e., crosstalk, is the main bottleneck for digital subscriber lines (DSL) technology. Dynamic spectrum management (DSM) mitigates crosstalk by focusing on the multiuser power/frequency resource allocation problem, and it can provide formidable gains in performance. In this paper, we look at the DSM problem from a different...
Article
This paper deals with the discrete multitone multiple input, multiple output interference channel (DMT MIMO IC) in DSL networks. The scenario consists of a number of users, each with a given number of transceivers, that share the same channel in multiple tones. Our goal is to maximize the weighted rate sum of the users subject to power constraints....
Conference Paper
Full-text available
This paper deals with the problem of power al-location in a multi-user, multicarrier communication system. This problem arises, for example, in wireless OFDM or digital subscriber line networks. Users transmitting concurrently on the same sub-carriers cause interference to each other, and this interference is a serious limitation for system perform...
Conference Paper
Full-text available
We focus on the effects of intercarrier interference (ICI) in digital subscriber line (DSL) systems due to asynchronous discrete multi-tone (DMT) transmission and its impact on dynamic spectrum man-agement (DSM). ICI arises when the DMT blocks of interfering users in the network are not aligned in time and it may significantly impact the system per...
Article
In this paper we focus on discrete multitone (DMT) dynamic spectrum management (DSM) in digital subscriber lines (DSL) networks with asynchronous crosstalk. DSM aims to optimally allocate per-user transmit spectra so that the effect of multi-user crosstalk is minimized and the capabilities of the network maximized. Most DSM solutions so far address...
Conference Paper
Full-text available
Joint spectrum and signal coordination is a promising dynamic spectrum management (DSM) technique to significantly boost data rates in vectored DSL systems. This paper presents a novel low-complexity algorithm for joint spectrum and receiver signal coordination in upstream DSL transmission. The algorithm is referred to as MAC-DSB and can be used fo...
Conference Paper
Full-text available
Dynamic spectrum management (DSM) aims to optimally al locate per-user transmit spectra so that the effect of multiuser interference (crosstalk) is minimized and the capabilities of the network are maximized. Work on DSM has progressed considerably over the past decade. Most of this work, however, deals with the idealized situation of perfect synch...
Article
Full-text available
We analyze the use of a feedback link in wireless orthogonal frequency division multiplexing (OFDM) systems. While open-loop scenarios have been rigorously investigated in the literature, closed-loop scenarios, in which there is a feedback link from a strong to a weak user, have not been thoroughly studied. We mainly focus on the recently proposed...
Article
Full-text available
Theoretical research has demonstrated that the gains in data rate achievable with spectrum coordination or signal coordi-nation techniques are substantial for digital subscriber line (DSL) networks. Work on these two fronts has progressed steadily and usually independently. In this paper, we com-bine the two types of coordination for a mixed DSL sc...
Patent
Full-text available
The present invention relates to method and arrangements for reducing crosstalk in a DSL system. This is achieved by providing the users in the network With a ghost line, i.e. a virtual line that should re?ect the damage to be caused to the remaining users in the network, and that each user allocates the PSDs such that the allocated PSD is optimize...
Conference Paper
Full-text available
Digital Subscriber Lines (DSL) are today one of the most important means for delivering high-speed data transmission. Dynamic Spectrum Management (DSM) is an emerging technique for dealing with crosstalk, one of the technology's most harmful problems. DSM judiciously designs users' power spectral densities so that the overall system performance is...
Conference Paper
Full-text available
Digital subscriber lines (DSL) are today one of the most important means for delivering high-speed data transmission. An emerging technique for dealing with one of the technology's most harmful problems, crosstalk, is dynamic spectrum management (DSM). DSM literature already counts with some half a dozen important solutions. These solutions can be...

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Projects

Projects (2)
Archived project
Project
Design, development and testing of next-generation 5G RF transceivers.