scholarly journals Digital Transmission Techniques that support Digital Broadcasting. OFDM Signal Degradation by Amplifiers and Measuring Method of the Nonlinearity.

1999 ◽  
Vol 53 (11) ◽  
pp. 1550-1556
Author(s):  
Mamoru Nagatsuka ◽  
Aiichiro Tsuzuku
Keyword(s):  
Digital Transmission ◽  
Measuring Method ◽  
Signal Degradation ◽  
Ofdm Signal ◽  
Digital Broadcasting

A Terrestrial Digital Broadcasting and Positioning System Based on Overlap Communication

2014 ◽  
Vol 568-570 ◽  
pp. 1282-1286
Author(s):  
Guo Cheng Wu ◽  
Zhan Xin Yang ◽  
Wei Zhang Xu
Keyword(s):  
Communication Theory ◽  
Digital Transmission ◽  
Performance Degradation ◽  
Transmission System ◽  
Positioning System ◽  
Navigation Signal ◽  
Performance Deterioration ◽  
Digital Broadcasting ◽  
Simulation Results

Inspired by the overlap communication theory, a new onshore radio positioning system which superimposed on terrestrial digital transmission system is proposed in this paper. This system overlaps but not affects existing terrestrial digital broadcasting.At the receiver, a reconstruction/cancellation algorithm.is implied to capture the navigation signal and positioning measurements precisely.This paper focus on the construction of overlap system,spreading navigation signal and the capture of positioning measurements.We give a method to generate spreading navigation signal and overlap with terrestrial digital transmission system.The method can reduce the performance degradation due to pilot interference. We also proposes a reconstruction/cancellation algorithm which can solution the capture performance deterioration caused by overlapped system . The simulation results show that this system proposed in this paper can be used in terrestrial digital transmission system and provide good positional function.

scholarly journals Digital Transmission. A Study on Equalization of OFDM Signal using Scattered Pilot Symbols.

1998 ◽  
Vol 52 (11) ◽  
pp. 1650-1657 ◽  
Author(s):  
Makoto Itami ◽  
Mayuko Yamashita ◽  
Masahiro Kuwabara ◽  
Kohji Itoh
Keyword(s):  
Digital Transmission ◽  
Pilot Symbols ◽  
Ofdm Signal

scholarly journals Selection and Justification of a Digital System Broadcasting for the Republic of Angola

2021 ◽  
Vol 7 (3) ◽  
pp. 55-63
Author(s):  
V.M.J. Santos
Keyword(s):  
Costa Rica ◽  
Sri Lanka ◽  
Digital Transmission ◽  
Experimental Results ◽  
The World ◽  
Broadcasting System ◽  
Digital Transmitter ◽  
Digital Broadcasting ◽  
The Republic ◽  
The City

In this work we seek to approach the choice of the Republic of Angola for the ISDB-T telebroadcasting system. The experimental results of the ISDB-T digital transmission system in the Republic of Angola are Execelente. Currently, the Japanese terrestrial digital broadcasting system (ISDB-T) is used in 14 countries around the world (Argentina, Bolivia, Brazil, Chile, Costa Rica, Japan, Peru, Paraguay, El Salvador, Uruguay, Honduras, Venezuela, Philippines, Botswana) and 6 more countries (Angola, Maldives, Sri Lanka, Guatemala, Ecuador, Nicaragua) have adopted this system. The study shows that ISDB-T is a system applicable in our country, as even with the transmitter operating at 50% of its maximum power, the signal is received in a large part of the city of Luanda, with failures only in regions far from the center urban. The implementation of a fully digital transmitter that is foreseen, the increase of the transmitter's power, among other changes, may provide better advantages in implementing the ISDBT in the Republic of Angola. The commitment comes at a time when Angola plans to cover the entire national territory, starting in 2023.

scholarly journals Digital Broadcasting. Trends on Digital Transmission Technologies for Broadcasting Services.

1996 ◽  
Vol 50 (1) ◽  
pp. 24-41
Author(s):  
Koichi Nio ◽  
Aiichiro Tsuzuku ◽  
Hajime Matsumura ◽  
Shuji Hirakawa ◽  
Naoki Kawai
Keyword(s):  
Digital Transmission ◽  
Digital Broadcasting
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