Asymmetric physical layer design for high-speed wireless digital communications

1999 ◽  
Vol 17 (10) ◽  
pp. 1712-1724 ◽  
Author(s):  
R.E. Badra ◽  
B. Daneshrad
Keyword(s):  
High Speed ◽  
Digital Communications ◽  
Physical Layer

The Analysis of the Transmission Signal Measured MIPI D-PHY

2014 ◽  
Vol 986-987 ◽  
pp. 2078-2081
Author(s):  
Wei Wei ◽  
Fei Teng Zhang
Keyword(s):  
High Speed ◽  
Physical Layer ◽  
Test Point ◽  
Point Selection ◽  
Test Analysis ◽  
Serial Interface ◽  
Test Items ◽  
Test Point Selection ◽  
Mobile Industry ◽  
Speed Mode

Analysis the characteristics of the measured transmission signal of Mobile Industry Processor Interface (MIPI) Display Serial Interface Physical Layer (D-PHY) interface based on a project platform. Firstly, introduces the transmission characteristics and mutual conversion process of physical layer about high-speed and low power mode, and by the transmission signal measured a platform of high-speed mode, present the D-PHY transmission signal each test items and test point selection, make the phone run smoothly and screen display normally, this test analysis certain practicability and expansibility.

scholarly journals MATLAB Simulation of IEEE802.11p Technology on High User’s Mobility

2021 ◽  
Author(s):  
abderrahim mountaciri
Keyword(s):  
Phase Shift ◽  
Doppler Effect ◽  
Orthogonal Frequency Division Multiplexing ◽  
High Speed ◽  
Physical Layer ◽  
Lms Algorithm ◽  
Ieee 802.11P ◽  
Vehicular Communication ◽  
Matlab Simulation ◽  
Vehicle To Vehicle

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

scholarly journals Link State Machine of PCI Express

2020 ◽  
Vol 9 (4) ◽  
pp. 1371-1372
Keyword(s):  
High Speed ◽  
Data Transfer ◽  
Physical Layer ◽  
State Machine ◽  
Data Link ◽  
Pci Express ◽  
Hard Drives ◽  
Link State ◽  
The Common ◽  
Communication Path

PCI Express is a high-speed serial computer expansion bus standard with advance error reporting technology. It is the common motherboard interface for personal computers' graphics cards, hard drives, SSDs, Wi-Fi and Ethernet hardware connections. A link in PCIe is the communication path between transmitter and receiver. PCIe operates in all transaction, data link and physical layer. The link bring up in physical layer is essential for the link state machine to proceed further into data transfer state. This paper analyses the Link training and status state machine for the Detect, Polling, Configuration and Recovery states. The state analysis is simulated using the TS1 and TS2 packets transfer between Root Complex and End Point.

Municipal Efforts to Promote Residential Broadband

2009 ◽  
pp. 589-610 ◽  
Author(s):  
Roland J. Cole ◽  
Isabel A. Cole ◽  
Jennifer A. Kurtz
Keyword(s):  
Small Business ◽  
Service Provision ◽  
High Speed ◽  
Potential Benefit ◽  
Digital Communications ◽  
Throughput Capacity ◽  
The Internet ◽  
Government Services ◽  
Small Organizations ◽  
Electronic Transactions

The key reason for including this chapter in this book is that the development of more advanced forms of e-government requires that residences have high-speed broadband. Without such connectivity, the advanced forms of service provision and exchange are simply not feasible. The potential benefit of delivering e-government services to entities outside government–in particular, individuals, households, or small organizations–is at least equal to the benefits that can be realized by performing governmentto- government processes electronically. Meeting citizen and small business expectations for efficiently performing electronic transactions over the Internet, however, depends on the design of the e-government application (which government can control), as well as the speed and throughput capacity of the digital communications connection (which government may influence but does not control). This chapter discusses issues surrounding municipal promotion of residential broadband, and the authors’ proposed resolution of such issues, along with suggestions for further research.

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