scholarly journals PhySim-11p: Simulation model for IEEE 802.11p physical layer in MATLAB

SoftwareX ◽  
2020 ◽  
Vol 12 ◽  
pp. 100580
Author(s):  
Xavier Alejandro Flores Cabezas ◽  
Martha Cecilia Paredes Paredes ◽  
Luis Felipe Urquiza-Aguiar ◽  
Diego Javier Reinoso-Chisaguano
2021 ◽  
Author(s):  
abderrahim mountaciri

Abstract In this article proposed IEEE 802.11p Physical layer (PHY). A MATLAB simulation is performed to analyze the baseband processing of the transceiver. Orthogonal Frequency Division Multiplexing (OFDM) is applied in this project according to the IEEE 802.11p standard, which allows data transmission rates from 3 to 27 Mbps. Separate modulation schemes, bit phase shift modulation (BPSK), quadrate phase shift modulation (QPSK), and quadrature amplitude modulation (QAM), are used for different data rates. These schemes are combined with time interleaving and a convolutional error correction code. A guard interval is inserted at the start of the transmitted symbol to reduce the effect of intersymbol interference (ISI). This article studies the PHY physical layer of the IEEE 802.11p vehicular communication standard. An IEEE.802.11p PHY model, with many associated phenomena, is implemented in the V2V vehicle-to- vehicle, and the vehicle-to-vehicle ad hoc network (VANET) provides convenient coordination between moving vehicles. A moving vehicle could move at a very high speed, producing a Doppler effect that damages OFDM symbols and also causes inter-carrier interference (ICI). This article has discussed VANET technology versus 802.11a technology, as they have many differences when it comes to user mobility. The Doppler effect resulting from the mobility of the user with a high speed of 25 to 400 km / h has been studied as the main parameter, the estimation of the channel based on the lms algorithm has been proposed in order to improve the performance of the physical physical chain


2021 ◽  
Author(s):  
Diego Javier Reinoso-Chisaguano ◽  
Juan Pablo Astudillo León ◽  
Martha Cecilia Paredes Paredes ◽  
Pablo Anibal Lupera Morillo ◽  
Luis F. Urquiza-Aguiar
Keyword(s):  

2020 ◽  
Vol 9 (2) ◽  
pp. 28 ◽  
Author(s):  
Thales Teixeira de Almeida ◽  
José Geraldo Ribeiro Júnior ◽  
Miguel Elias M. Campista ◽  
Luís Henrique M. K. Costa

The high cost of IEEE 802.11p-compliant devices and the lack of a widely adopted standard motivate the search for alternative methods for vehicular communication. As a consequence, and due to the ubiquity of smartphones, we see an increasing number of proposals based on Wi-Fi Direct, especially related to the integration of pedestrians in VANETs. Nevertheless, given the complexity of real experimentation, it is difficult to assess the ability of Wi-Fi Direct to offer connectivity in the vehicular environment on a large scale, leading to the evaluation through simulation. In order to verify the ability of a simulation model of reproducing the Wi-Fi Direct behavior, we analyze the performance of a safety application based on the communication range, packet delivery rate, and packet inter-reception time. In V2P scenarios, with and without line of sight, with varying vehicle speed, measurements using smartphones are performed and their results compared with those of OMNeT++ simulator. The results indicate, apart from the simulator’s accuracy, that the connection establishment time hinders the use of Wi-Fi Direct as a replacement to 802.11p. As an outcome of this observation, we evaluate a new transmission method for Wi-Fi Direct based on beacon stuffing, which mitigates the long connection establishment issue.


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