Abstract:- This is an extension algorithm previously presented in [1] for decoded modulation syst... more Abstract:- This is an extension algorithm previously presented in [1] for decoded modulation systems with block codes for 8-PSK and 16-PSK constellations. The proposed algorithm presents a search mechanism of the least reliable points from the first code array and generate vectors for the Modified BCM, ZNA decoder, described in [1]. It is also presented a mapping of the 8-PSK and 16-PSK constellations in BPSK so the Modified ZNA could get the relevant results. Finally computer simulated results are compared for the 8-PSK and 16-PSK constellations, acquired from the sub-optimal algorithm proposed (Viterbi for BCM and MLD).
Abstract:- This is an extension algorithm previously presented in [1] for decoded modulation syst... more Abstract:- This is an extension algorithm previously presented in [1] for decoded modulation systems with block codes for 8-PSK and 16-PSK constellations. The proposed algorithm presents a search mechanism of the least reliable points from the first code array and generate vectors for the Modified BCM, ZNA decoder, described in [1]. It is also presented a mapping of the 8-PSK and 16-PSK constellations in BPSK so the Modified ZNA could get the relevant results. Finally computer simulated results are compared for the 8-PSK and 16-PSK constellations, acquired from the sub-optimal algorithm proposed (Viterbi for BCM and MLD).
Advances in Electrical and Computer Engineering, 2021
Filamentous fungi have a structure called mycelium which is the vegetative part of the organism t... more Filamentous fungi have a structure called mycelium which is the vegetative part of the organism that forms the body or colony, which can function as a support, reproduction and absorpt ...
Anais do Workshop de Computação Urbana (CoUrb 2020), 2020
As Redes Ad Hoc Veiculares (VANETs) fazem parte dos Sistemas Inteligentes de Transporte (ITS) e t... more As Redes Ad Hoc Veiculares (VANETs) fazem parte dos Sistemas Inteligentes de Transporte (ITS) e têm por objetivo prover a comunicação entre veículos. Por serem redes auto-organizáveis e auto gerenciáveis com controle descentralizado, seu desempenho é totalmente dependente do tempo de duração das rotas. Este trabalho propõe a análise do tempo de duração de rotas em redes veiculares considerando três fatores influentes: velocidade, densidade e sentido dos deslocamentos. Experimentos de simulação comprovam que o tempo de duração de rotas aumenta em redes mais densas e quando os veículos trafegam no mesmo sentido. Além disso, o tempo de duração de rotas não sofre modificações significativas em função da velocidade dos veículos quando essas são limitadas pelo ambiente (como no caso do ambiente veicular urbano).
Link state routing protocols, like OSPF, are used in IP backbones to correctly define the routes.... more Link state routing protocols, like OSPF, are used in IP backbones to correctly define the routes. During failure situations, the OSPF process needs a due time to react and find new routes. During this time, the routes can present instability with high packet loss rate, which affects backbone reliability. This study proposes a proactive approach named E-CER in order to reduce the OSPF packet loss rate during the reaction time. This approach is evaluated in representations of synthetic and real backbone topologies, and also in a network simulator to analyze the reduction of packet loss rate, which has rendered rather satisfactory outcomes.
Anais do Workshop de Computação Urbana (CoUrb 2020), 2020
As Redes Ad Hoc Veiculares (VANETs) fazem parte dos Sistemas Inteligentes de Transporte (ITS) e t... more As Redes Ad Hoc Veiculares (VANETs) fazem parte dos Sistemas Inteligentes de Transporte (ITS) e têm por objetivo prover a comunicação entre veículos. Por serem redes auto-organizáveis e auto gerenciáveis com controle descentralizado, seu desempenho é totalmente dependente do tempo de duração das rotas. Este trabalho propõe a análise do tempo de duração de rotas em redes veiculares considerando três fatores influentes: velocidade, densidade e sentido dos deslocamentos. Experimentos de simulação comprovam que o tempo de duração de rotas aumenta em redes mais densas e quando os veículos trafegam no mesmo sentido. Além disso, o tempo de duração de rotas não sofre modificações significativas em função da velocidade dos veículos quando essas são limitadas pelo ambiente (como no caso do ambiente veicular urbano).
Link state routing protocols, like OSPF, are used in IP backbones to correctly define the routes.... more Link state routing protocols, like OSPF, are used in IP backbones to correctly define the routes. During failure situations, the OSPF process needs a due time to react and find new routes. During this time, the routes can present instability with high packet loss rate, which affects backbone reliability. This study proposes a proactive approach named E-CER in order to reduce the OSPF packet loss rate during the reaction time. This approach is evaluated in representations of synthetic and real backbone topologies, and also in a network simulator to analyze the reduction of packet loss rate, which has rendered rather satisfactory outcomes.
Abstract:- This is an extension algorithm previously presented in [1] for decoded modulation syst... more Abstract:- This is an extension algorithm previously presented in [1] for decoded modulation systems with block codes for 8-PSK and 16-PSK constellations. The proposed algorithm presents a search mechanism of the least reliable points from the first code array and generate vectors for the Modified BCM, ZNA decoder, described in [1]. It is also presented a mapping of the 8-PSK and 16-PSK constellations in BPSK so the Modified ZNA could get the relevant results. Finally computer simulated results are compared for the 8-PSK and 16-PSK constellations, acquired from the sub-optimal algorithm proposed (Viterbi for BCM and MLD).
Abstract:- This is an extension algorithm previously presented in [1] for decoded modulation syst... more Abstract:- This is an extension algorithm previously presented in [1] for decoded modulation systems with block codes for 8-PSK and 16-PSK constellations. The proposed algorithm presents a search mechanism of the least reliable points from the first code array and generate vectors for the Modified BCM, ZNA decoder, described in [1]. It is also presented a mapping of the 8-PSK and 16-PSK constellations in BPSK so the Modified ZNA could get the relevant results. Finally computer simulated results are compared for the 8-PSK and 16-PSK constellations, acquired from the sub-optimal algorithm proposed (Viterbi for BCM and MLD).
Advances in Electrical and Computer Engineering, 2021
Filamentous fungi have a structure called mycelium which is the vegetative part of the organism t... more Filamentous fungi have a structure called mycelium which is the vegetative part of the organism that forms the body or colony, which can function as a support, reproduction and absorpt ...
Anais do Workshop de Computação Urbana (CoUrb 2020), 2020
As Redes Ad Hoc Veiculares (VANETs) fazem parte dos Sistemas Inteligentes de Transporte (ITS) e t... more As Redes Ad Hoc Veiculares (VANETs) fazem parte dos Sistemas Inteligentes de Transporte (ITS) e têm por objetivo prover a comunicação entre veículos. Por serem redes auto-organizáveis e auto gerenciáveis com controle descentralizado, seu desempenho é totalmente dependente do tempo de duração das rotas. Este trabalho propõe a análise do tempo de duração de rotas em redes veiculares considerando três fatores influentes: velocidade, densidade e sentido dos deslocamentos. Experimentos de simulação comprovam que o tempo de duração de rotas aumenta em redes mais densas e quando os veículos trafegam no mesmo sentido. Além disso, o tempo de duração de rotas não sofre modificações significativas em função da velocidade dos veículos quando essas são limitadas pelo ambiente (como no caso do ambiente veicular urbano).
Link state routing protocols, like OSPF, are used in IP backbones to correctly define the routes.... more Link state routing protocols, like OSPF, are used in IP backbones to correctly define the routes. During failure situations, the OSPF process needs a due time to react and find new routes. During this time, the routes can present instability with high packet loss rate, which affects backbone reliability. This study proposes a proactive approach named E-CER in order to reduce the OSPF packet loss rate during the reaction time. This approach is evaluated in representations of synthetic and real backbone topologies, and also in a network simulator to analyze the reduction of packet loss rate, which has rendered rather satisfactory outcomes.
Anais do Workshop de Computação Urbana (CoUrb 2020), 2020
As Redes Ad Hoc Veiculares (VANETs) fazem parte dos Sistemas Inteligentes de Transporte (ITS) e t... more As Redes Ad Hoc Veiculares (VANETs) fazem parte dos Sistemas Inteligentes de Transporte (ITS) e têm por objetivo prover a comunicação entre veículos. Por serem redes auto-organizáveis e auto gerenciáveis com controle descentralizado, seu desempenho é totalmente dependente do tempo de duração das rotas. Este trabalho propõe a análise do tempo de duração de rotas em redes veiculares considerando três fatores influentes: velocidade, densidade e sentido dos deslocamentos. Experimentos de simulação comprovam que o tempo de duração de rotas aumenta em redes mais densas e quando os veículos trafegam no mesmo sentido. Além disso, o tempo de duração de rotas não sofre modificações significativas em função da velocidade dos veículos quando essas são limitadas pelo ambiente (como no caso do ambiente veicular urbano).
Link state routing protocols, like OSPF, are used in IP backbones to correctly define the routes.... more Link state routing protocols, like OSPF, are used in IP backbones to correctly define the routes. During failure situations, the OSPF process needs a due time to react and find new routes. During this time, the routes can present instability with high packet loss rate, which affects backbone reliability. This study proposes a proactive approach named E-CER in order to reduce the OSPF packet loss rate during the reaction time. This approach is evaluated in representations of synthetic and real backbone topologies, and also in a network simulator to analyze the reduction of packet loss rate, which has rendered rather satisfactory outcomes.
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Papers by Emilio C . G . Wille