Absolute Calibration of BOC Navigation Signal Transmission Channel

This article has designed a digital signal transmission performance analysis system using FPGA. It uses FPGA to generate the m-sequence whose frequency can be adjusted step by step and it uses Manchester encoding. Through the transmission channel, a fast bit synchronization detection arithmetic is used to abstract bit synchronization clock by FPGA. The oscilloscope can use the bit synchronization clock to observe eye diagram and other information. The system has the advantages of good transplant, small size, low-power consumption and high reliability.

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Architecture Design of Multisystem Satellite Navigation Signal Simulator Base on Software

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.568-570.1001 ◽

2014 ◽

Vol 568-570 ◽

pp. 1001-1007

Author(s):

Zhan Shu ◽

Rong Chen

Keyword(s):

Low Cost ◽

Signal Transmission ◽

Estimation Method ◽

Doppler Frequency ◽

Satellite Navigation ◽

Satellite Navigation System ◽

Signal Simulator ◽

Navigation Signal ◽

Navigation Signals ◽

Modulation Methods

Compared to conventional navigation signal simulators, software simulator has many advantages, which include flexible design, easy extending, strong openness, and low cost. With the development of satellite navigation, satellite navigation system is getting more and more complicated. Based on the analysis for satellite navigation signal model in different modulation methods of multisystem, it is very urgent to establish a unified description method, which can reduce duplication writing of algorithm. firstly, description method for multisystem satellite navigation signal simulator is proposed. Secondly, it can describe different systems of satellite navigation signals and provide estimation method for signal transmission delay time and Doppler frequency shift. Finally, the signal of simulation is validated.

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Engineers or Lawyers? Institutions and Demand for Higher Education

Voprosy Ekonomiki ◽

10.32609/0042-8736-2012-10-30-51 ◽

2012 ◽

pp. 30-51 ◽

Cited By ~ 7

Author(s):

T. Natkhov ◽

L. Polishchuk

Keyword(s):

Higher Education ◽

Public Administration ◽

Rule Of Law ◽

Transmission Channel ◽

Demand For Education ◽

Fields Of Study ◽

Quality Of Institutions ◽

Cross Country ◽

Rules Of The Game

Law and public administration schools in Russia vastly exceed in their popularity sciences and engineering. We relate such lopsided demand for higher education to the quality of institutions setting “rules of the game” in economy and society. Cross-country and Russian interregional data indicate the quality of institutions (rule of law, protection of property rights etc.) is negatively associated with the demand for education in law, and positively — in sciences and engineering. More gifted younger people are particularly sensitive to the quality of institutions in choosing their fields of study, and such selection is an important transmission channel between institutions and economic growth.

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