Luis F. Abanto-Leon

Luis F. Abanto-Leon
Technische Universität Darmstadt | TU

About

42
Publications
2,604
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90
Citations
Introduction
I am working on hybrid precoding for several uses cases: single-group multicasting, multi-group multicasting, superimposed unicast and multicast, joint scheduling and precoding, mainly targetting massive IoT. As design tools, I employ convex optimization and machine learning. In the past, I have worked on resource allocation and scheduling for V2X communications. Presentation slides and preprints can be found at: >> https://www.luis-f-abanto-leon.com/
Education
November 2018 - December 2022
Technische Universität Darmstadt
Field of study
  • Computer Science
October 2013 - September 2015
Tohoku University
Field of study
  • Communications Engineering

Publications

Publications (42)
Article
The intrinsic hardware imperfection of WiFi chipsets manifests itself in the transmitted signal, leading to a unique radiometric (radio frequency) fingerprint. This fingerprint can be used as an additional means of authentication to enhance security. In this paper, we prove analytically and experimentally that these solutions are highly vulnerable...
Article
Context-based copresence detection schemes are a necessary prerequisite to building secure and usable authentication systems in the Internet of Things ( IoT ) . Such schemes allow one device to verify proximity of another device without user assistance utilizing their physical context (e.g., audio). The state-of-the-art copresence detection schemes...
Preprint
Full-text available
Millimeter-wave self-backhauled small cells are a key component of next-generation wireless networks. Their dense deployment will increase data rates, reduce latency, and enable efficient data transport between the access and backhaul networks, providing greater flexibility not previously possible with optical fiber. Despite their high potential, o...
Preprint
Full-text available
This paper investigates rate-splitting (RS) precoding for non-orthogonal unicast and multicast (NOUM) transmissions using fully-digital and hybrid precoders. We study the nonconvex weighted sum-rate (WSR) maximization problem subject to a multicast requirement. We propose FALCON, an approach based on sequential parametric optimization, to solve the...
Preprint
Context-based copresence detection schemes are a necessary prerequisite to building secure and usable authentication systems in the Internet of Things (IoT). Such schemes allow one device to verify proximity of another device without user assistance utilizing their physical context (e.g., audio). The state-of-the-art copresence detection schemes su...
Preprint
Full-text available
The omnipresence of IoT devices in Industry 4.0 is expected to foster higher reliability, safety, and efficiency. However, interconnecting a large number of wireless devices without jeopardizing the system performance proves challenging. To address the requirements of future industries, we investigate the cross-layer design of beamforming and sched...
Conference Paper
Full-text available
The intrinsic hardware imperfection of WiFi chipsets manifests itself in the transmitted signal, leading to a unique radiometric fingerprint. This fingerprint can be used as an additional means of authentication to enhance security. In fact, recent works propose practical fingerprinting solutions that can be readily implemented in commercial-off-th...
Preprint
Full-text available
The intrinsic hardware imperfection of WiFi chipsets manifests itself in the transmitted signal, leading to a unique radiometric fingerprint. This fingerprint can be used as an additional means of authentication to enhance security. In fact, recent works propose practical fingerprinting solutions that can be readily implemented in commercial-off-th...
Preprint
Full-text available
Cyclically shifted partial transmit sequences (CSPTS) has conventionally been used in SISO systems for PAPR reduction of OFDM signals. Compared to other techniques, CS-PTS attains superior performance. Nevertheless, due to the exhaustive search requirement, it demands excessive computational complexity. In this paper, we adapt CS-PTS to operate in...
Preprint
Full-text available
This paper investigates dual-layer non-orthogonally superimposed transmissions for industrial internet of things (IoT) millimeter-wave communications. Essentially, the overlayer is a multicast signal devised to serve all the devices in coverage with a common message, i.e., critical control packet. The underlayer is a composite signal that consists...
Preprint
Full-text available
This paper investigates the joint design of hybrid transmit precoder and analog receive combiners for single-group multicasting in millimeter-wave systems. We propose LB-GDM, a low-complexity learning-based approach that leverages gradient descent with momentum and alternating optimization to design (i) the digital and analog constituents of a hybr...
Preprint
Full-text available
Industry 4.0 anticipates massive interconnectivity of industrial devices (e.g., sensors, actuators) to support factory automation and production. Due to the rigidity of wired connections to harmonize with automation, wireless information transfer has attracted substantial attention. However, existing solutions for the manufacturing sector face crit...
Preprint
Full-text available
In Release 14, 3GPP introduced a novel paradigm known as cellular vehicle--to--everything (C-V2X) \emph{mode-4} to specifically support vehicular communications in scenarios without network coverage. Such a scheme has been devised to operate distributedly harnessing a sensing mechanism whereby vehicles can monitor the received power across subchann...
Preprint
Full-text available
This paper proposes an enhanced list-aided successive cancellation stack (ELSCS) decoding algorithm with adjustable decoding complexity. In addition, a logarithmic likelihood ratio (LLR)-threshold based path extension scheme is designed to further reduce the memory consumption of stack decoding. Numerical simulation results show that without affect...
Conference Paper
Full-text available
Multicast beamforming is known to improve spectral efficiency. However, its benefits and challenges for hybrid precoders design in millimeter-wave (mmWave) systems remain understudied. To this end, this paper investigates the first joint design of hybrid transmit precoders (with an arbitrary number of finite-resolution phase shifts) and receive com...
Preprint
Full-text available
Multicast beamforming is known to improve spectral efficiency. However, its benefits and challenges for hybrid precoders design in millimeter-wave (mmWave) systems remain understudied. To this end, this paper investigates the first joint design of hybrid transmit precoders (with an arbitrary number of finite-resolution phase shifts) and receive com...
Article
Full-text available
This study proposes an enhanced list‐aided successive cancellation stack (ELSCS) decoding algorithm with adjustable decoding complexity. Also, a logarithmic likelihood ratio‐threshold based path extension scheme is designed to further reduce the memory consumption of stack decoding. Numerical simulation results show that without affecting the error...
Conference Paper
Full-text available
In Release 14, the 3rd Generation Partnership Project (3GPP) introduced Cellular Vehicle--to--Everything (C-V2X) \textit{mode-4} as a novel disruptive technology to support sidelink vehicular communications in out--of--coverage scenarios. C-V2X \textit{mode-4} has been engineered to operate in a distributed manner, wherein vehicles autonomously mon...
Preprint
Full-text available
In Release 14, the 3rd Generation Partnership Project (3GPP) introduced Cellular Vehicle--to--Everything (C-V2X) \textit{mode-4} as a novel disruptive technology to support sidelink vehicular communications in out--of--coverage scenarios. C-V2X \textit{mode-4} has been engineered to operate in a distributed manner, wherein vehicles autonomously mon...
Preprint
Full-text available
The 3rd Generation Partnership Project (3GPP) introduced Cellular Vehicle--to--Everything (C-V2X) as a novel technology to support sidelink vehicular communications. While a distributed scheduling approach has been proposed by 3GPP for the out--of--coverage scenario, i.e. C-V2X \textit{mode-4}, there is no standardized scheme for centralized system...
Preprint
Full-text available
Source localization is of pivotal importance in several areas such as wireless sensor networks and Internet of Things (IoT), where the location information can be used for a variety of purposes, e.g. surveillance, monitoring, tracking, etc. Time Difference of Arrival (TDOA) is one of the well-known localization approaches where the source broadcast...
Preprint
Full-text available
In V2V Mode-3, eNodeBs assign subchannels to vehicles in order for them to periodically broadcast CAM messages \cite{b2}. A crucial aspect is to ensure that vehicles in the same cluster will broadcast in orthogonal time subchannels\footnote{A subchannel is a time-frequency resource chunk capable of sufficiently conveying a CAM message.} to avoid co...
Conference Paper
Full-text available
Source localization is of pivotal importance in several areas such as wireless sensor networks and Internet of Things (IoT), where the location information can be used for a variety of purposes, e.g. surveillance, monitoring, tracking, etc. Time Difference of Arrival (TDOA) is one of the well-known localization approaches where the source broadcast...
Preprint
Full-text available
The 3rd Generation Partnership Project (3GPP) has introduced in Rel. 14 a novel technology referred to as vehicle--to--vehicle (V2V) \textit{mode-3}. Under this scheme, the eNodeB assists in the resource allocation process allotting sidelink subchannels to vehicles. Thereupon, vehicles transmit their signals in a broadcast manner without the interv...
Preprint
Full-text available
Conversely to mainstream cellular networks where uplink / downlink data traffic is centrally managed by eNodeBs, in vehicle-to-vehicle (V2V) broadcast communications \textit{mode-3} eNodeBs engage solely in subchannel assignment but ultimately do not intervene in data traffic control. Accordingly, vehicles communicate directly with their counterpar...
Preprint
Full-text available
In this paper we present a graph-based resource allocation scheme for sidelink broadcast V2V communications. Harnessing available information on geographical position of vehicles and spectrum resources utilization, eNodeBs are capable of allotting the same set of sidelink resources to different vehicles distributed among several communications clus...
Preprint
Full-text available
In this paper we present a graph-based resource allocation scheme for sidelink broadcast vehicle-to-vehicle (V2V) communications. Harnessing available information on the geographical position of vehicles and spectrum resources utilization, eNodeBs are capable of allotting the same set of sidelink resources to several different vehicles in order for...
Conference Paper
Full-text available
Conversely to mainstream cellular networks where uplink / downlink data traffic is centrally managed by eN-odeBs, in vehicle-to-vehicle (V2V) broadcast communications mode-3 eNodeBs engage solely in subchannel assignment but ultimately do not intervene in data traffic control. Accordingly, vehicles communicate directly with their counterparts utili...
Conference Paper
In this poster we present a graph-based hierarchical subchannel allocation scheme for V2V sidelink communications in Mode-3. Under this scheme, the eNodeB allocates subchannels for in-coverage vehicles. Then, vehicles will broadcast directly without the eNodeB intervening in the process. Therefore, in each communications cluster, it will become cru...
Conference Paper
Full-text available
In this paper we present a graph-based resource allocation scheme for sidelink broadcast vehicle-to-vehicle (V2V) communications. Harnessing available information on the geographical position of vehicles and spectrum resources utilization, eNodeBs are capable of allotting the same set of sidelink resources to several different vehicles in order for...
Conference Paper
Full-text available
In this paper we present a graph-based resource allocation scheme for sidelink broadcast V2V communications. Harnessing available information on geographical position of vehicles and spectrum resources utilization, eNodeBs are capable of allotting the same set of sidelink resources to different vehicles distributed among several communications clus...

Questions

Questions (5)
Question
I have a few questions related to the computational complexity of some standard program classes in terms of the number of constraints (m) and number of optimization variables (n). For instance,
1) Computational complexity of a linear program: C_LP = ?
2) Computational complexity of a SOCP program: C_SOCP = ?
3) Computational complexity of a SDP program: C_SDP = ?
I would be grateful if you also point me to an updated reference to study further details.
4) Also, is there a major difference when dealing with real and complex numbers? The only difference I can think of is that the dimensionality of variables is doubled in the complex case but the number of constraints remain the same.
In addition, how is the computational complexity of mixed-integer linear programs (MILPs) computed? For a given binary assignment, the MILP becomes a LP and the complexity for this instance is C_LP as in point 1). So, the worst case complexity can be found as “k x C_LP” where k represents all possible combinations of the binary variables. In some cases, k can be found easily but in others, finding k is more complicated.
5) How is the complexity of two MILPs usually compared when “k” is not easily obtained? Is execution time the only possible measure?
Thanks in advance.
Question
I am looking for the most recent 3GPP document that shows different data rates supported for various MCS configurations.
- Could you please refer me to this document?
- Is 64QAM the highest modulation scheme or are there any current efforts in expanding the constellation size ?
Thank you!
Question
I would like to know if there are any well-accepted models for a full-duplex channel. Precisely, I am wondering if there is something like:
C = a*log2(1+SINR) or
C = log2(1+a*SINR)
where 0<a<1. I am working with analog-digital transcievers, and I am aware that I would normally have to substract a percentage of the transmitted signal from the received one. However, this process will create additional multiplicative coupling between the hybrid combiners and precoders. So, in order to mitigate such multiplicative effect and simplify the optimization, I would like to know if there are any references that discuss a capacity model with an attenuation factor. Thank you!
Question
I would like to know if there is an expression that shows the (maximum) channel capacity of a downlink multiuser MIMO channel when imperfect CSI is assumed.
Any references in this direction would be useful for me. Thanks!
Question
Hi! I would like to know how many SIC layers (in power-domain NOMA-like schemes) are seen as practical. In theory, we could have multiple layers and peel each of them sequentially. But with each layer, the latency and BER also increases. I wonder how many layers are feasible and practical. Is there any suggested number of layers in 3GPP standards? Are we talking about 2, 3, 4 layers? Thank you.

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Projects

Projects (2)
Project
The objective is to compare the performance of centralized and distributed schemes in vehicular networks under the paradigm on Cellular Vehicle--to--Everything communications.