Multi-level quantization and blind equalization based direct transmission method of digital baseband signal

2017 ◽  
Vol 25 ◽  
pp. 348-354
Author(s):  
Maolin Ji ◽  
Jin Chen ◽  
Zeng Liu ◽  
Ying Tong ◽  
Fajie Duan ◽  
...  
Keyword(s):  
Blind Equalization ◽  
Direct Transmission ◽  
Transmission Method ◽  
Baseband Signal ◽  
Multi Level ◽  
Level Quantization ◽  
Digital Baseband

scholarly journals Research and Analysis of Digital Baseband Transmission System Based on MATLAB

2018 ◽  
Vol 1 (1) ◽  
Author(s):  
Chai Jianwen
Keyword(s):  
Signal Transmission ◽  
Digital Signal ◽  
Transmission System ◽  
Simulation Software ◽  
Line Pattern ◽  
Matlab Simulation ◽  
Simulation Process ◽  
Transmission Process ◽  
Baseband Signal ◽  
Digital Baseband

This paper mainly studies the basic concept of baseband transmission of digital signal and the transmission processof digital signal baseband transmission and how to design digital baseband transmission system with MATLABsoftware simulation. This paper fi rst introduces the theoretical basis of this subject, including digital communication,the composition of digital baseband transmission system and digital baseband signal transmission process. Then thepaper introduced the characteristics of digital baseband transmission system, including digital PAM signal powerdensity and common line pattern, and by comparing choosing the fi nal bipolar zero return code. Then we introducedthe MATLAB simulation software. The conditions of the best reception of the digital baseband signal are describedand how the waveform of the baseband signal is observed by an oscilloscope. Finally, according to the basic stepsof simulation process, the simulation process of digital baseband transmission system is realized by MATLABsimulation tool, and the system is analyzed.

scholarly journals Tailoring the Switching Dynamics in Yttrium Oxide‐Based RRAM Devices by Oxygen Engineering: From Digital to Multi‐Level Quantization toward Analog Switching

2020 ◽  
Vol 6 (11) ◽  
pp. 2000439
Author(s):  
Stefan Petzold ◽  
Eszter Piros ◽  
Robert Eilhardt ◽  
Alexander Zintler ◽  
Tobias Vogel ◽  
...  
Keyword(s):  
Yttrium Oxide ◽  
Switching Dynamics ◽  
Multi Level ◽  
Level Quantization

scholarly journals Proposal of QAM-OFDM System with IDAR Method Designed for Satellite Channel

1970 ◽  
Vol 6 (2) ◽  
pp. 108-119
Author(s):  
Pornpawit Boonsrimuang ◽  
Pisit Boonsrimuang ◽  
Tawil Paungma ◽  
Hideo Kobayashi
Keyword(s):  
Communication Systems ◽  
Satellite Communication ◽  
Estimation Method ◽  
Modulation Method ◽  
Reconstruction Method ◽  
Transmission Method ◽  
Multimedia Services ◽  
Single Carrier ◽  
Non Linear ◽  
Multi Level

The future satellite communication systems are required to support the higher transmission data rate for providing multimedia services by employing the efficient modulation method such as multilevel QAM. However, the employment of conventional single carrier transmission method with multi-level QAM which has larger PAPR (Peak to Averaged Power Ratio) would cause the fatal degradation of signal quality due to the non-linear amplifiers located at the earth station and satellite. To overcome this problem, this paper proposes broadband satellite communication systems by using the multilevel QAM-OFDM technique with IDAR (Improved Decision Aided Reconstruction) method, which is designed for satellite channel. In the IDAR method, the characteristics of non-linear amplifiers are required to be known at the receiver for mitigating the intermodulation noise. This paper also proposes the estimation method for AM-AM and AM-PM conversion characteristics of non-linear amplifiers by using low PAPR preamble symbols. The various computer simulations are conducted in this paper to verify the effectiveness of proposed system in the non-linear satellite channel.

Error diffusion concept for multi-level quantization

1990 ◽  
Vol 79 (5) ◽  
pp. 280-284 ◽  
Author(s):  
Manfred Broja ◽  
Kristina Michalowski ◽  
Olof Bryngdahl
Keyword(s):  
Error Diffusion ◽  
Multi Level ◽  
Level Quantization
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