Coded Modulation for High Spectral Efficiency Long-Haul Optical Transmission System

2013 ◽  
Author(s):  
Hongbin Zhang ◽  
Hussam G. Batshon
Keyword(s):  
Spectral Efficiency ◽  
Optical Transmission ◽  
Transmission System ◽  
Coded Modulation ◽  
High Spectral Efficiency

scholarly journals Channel Statistical OFDM Transmission System Resource Allocation Algorithm

2021 ◽  
Vol 2136 (1) ◽  
pp. 012035
Author(s):  
Min Huang
Keyword(s):  
Spectral Efficiency ◽  
Water Injection ◽  
Scientific Basis ◽  
Transmission System ◽  
System Structure ◽  
Resource Allocation Algorithm ◽  
Allocation Algorithm ◽  
High Spectral Efficiency ◽  
System Resource ◽  
Channel Statistics

Abstract In order to achieve high spectral efficiency in OFDM transmission system, it is necessary to put forward the corresponding efficient subcarrier and power allocation algorithm. Therefore, on the basis of understanding the basic principle and system structure of OFDM, this paper analyzes the corresponding allocation algorithm according to the multi-user water injection theory, and studies the final results, so as to provide an effective scientific basis for future channel statistics research.

scholarly journals Fixed Reception Performance of FDM-based Transmission System for Advanced ISDB-T

2020 ◽  
Vol 2020 (6) ◽  
pp. 9-20
Author(s):  
Takuya Shitomi ◽  
◽  
Shingo Asakura ◽  
Shogo Kawashima ◽  
Akihiko Sato, ◽  
...  
Keyword(s):  
Channel Coding ◽  
Forward Error Correction ◽  
Transmission System ◽  
Coded Modulation ◽  
Transmission Capacity ◽  
Frame Structure ◽  
Modulation Scheme ◽  
High Spectral Efficiency ◽  
Digital Terrestrial Television ◽  
T System

With the aim of improving the quality and expanding the functions of digital terrestrial television broadcasting services, we have been developing an advanced transmission system that inherits key features of the current Integrated Services Digital Broadcasting-Terrestrial (ISDB-T) system, which employs hierarchical transmission based on frequency division multiplexing (FDM) and a segment structure. The advanced ISDB-T system has a new signal frame structure that enables bandwidth to be flexibly allocated to multiple services for different reception scenarios, such as fixed reception and mobile reception, compared with ISDB-T. By introducing transmission technologies such as the latest forward error correction and modulation scheme, this specification has high spectral efficiency and transmission robustness, i.e., the transmission capacity increases by about 10 Mbps for the same required carrier to noise ratio (CNR) in comparison with the current ISDB-T system, or the required CNR can be reduced by about 7 dB for the same transmission capacity. We describe the channel coding scheme and evaluated the performance of bit-interleaved coded modulation (BICM) in simulations. This paper provides a BICM selection guideline based on the simulation results for fixed reception scenarios toward the practical application of advanced ISDB-T.

High Spectral Efficiency Optical Transmission with Probabilistic Constellation Shaping

2018 ◽  
Author(s):  
Junho Cho ◽  
Sethumadhavan Chandrasekhar ◽  
Gregory Raybon ◽  
Xi Chen ◽  
Samuel L. I. Olsson ◽  
...  
Keyword(s):  
Spectral Efficiency ◽  
Optical Transmission ◽  
Constellation Shaping ◽  
High Spectral Efficiency
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