Design of a DSP-based high-speed turbo code decoder for WCDMA applications

2005 ◽  
Author(s):  
Wu Yi ◽  
Zhou Shidong ◽  
Yao Yan
Keyword(s):  
High Speed ◽  
Turbo Code

scholarly journals Turbo-coded Ultra Long Haul System with Probabilistic Shaped 16QAM Modulation

2021 ◽  
Vol 2112 (1) ◽  
pp. 012027
Author(s):  
Ziqi Wang ◽  
Yuzhe Li ◽  
Yuan Gao ◽  
Xishuo Wang ◽  
Qi Zhang
Keyword(s):  
Communication Technology ◽  
Mobile Communication ◽  
High Speed ◽  
Turbo Code ◽  
Optical Fiber Communication ◽  
Modulation Scheme ◽  
Modulation Format ◽  
Transmission Distance ◽  
Bit Error Ratio ◽  
Mobile Communication Technology

Abstract With the rapid growth and development of 5G (5th Generation Mobile Communication Technology) and the incoming of 6G (6th Generation Mobile Communication Technology), the demand for high-speed and flexible communication solutions is becoming far more urgent. Within this paper, a novel code modulation scheme based on PS (probabilistic shaping) and Turbo code is proposed with its effectiveness is confirmed by the results of simulation. The results inform that in an optical fiber communication system with 56 Gb/s rate and 3000 km transmission distance, when the SNR (signal-noise ratio) is greater than 3.5 dB, the Turbo-coded PS-16QAM modulation format can achieve reliable transmission. The proposed scheme performs the best in BER (bit error ratio) and average launch power in the four cases of uniform 16QAM, PS-16QAM, Turbo-coded 16QAM with and itself. The proposed scheme is a potential solution in the future 5G communication.

High Speed Data Transmission Using Coding

2012 ◽  
Vol 229-231 ◽  
pp. 1635-1638
Author(s):  
Yousef Hwegi ◽  
Nasser Hassen
Keyword(s):  
Data Transmission ◽  
High Speed ◽  
Forward Error Correction ◽  
Convolutional Code ◽  
Turbo Code ◽  
System Capacity ◽  
Signal Degradation ◽  
High Speed Data ◽  
Forward Error ◽  
Speed Data Transmission

The relible and fast data transmission over noisy band limitted channels is the basic requirment of digital communication and transmission system. Reliability considerations require that forward error correction techniques be used. This techniques find and correct limitted erros caused by a transport or storage systems. Such coding technique is therefore used to help compensate for signal degradation and provide increase in system capacity and reliability. In this paper, we analyze the performance of three codes which are the Reed Soloman Code, the convolutional code, and turbo code for the same signal that is corrupted by transmission channel. The type of channel considered in this work is the AWGN. For the same message length, the turbo code gives the best performance and the Reed Soloman Code gave the poorest performance when the signal is corrupted by AWGN channel.

scholarly journals Hardware implementation issues of turbo decoders

2012 ◽  
Vol 47 (3) ◽  
pp. 327-332
Author(s):  
MS Islam ◽  
MA Quaium ◽  
M Morshed ◽  
RC Roy
Keyword(s):  
High Speed ◽  
Turbo Code ◽  
General Structure ◽  
Parallel Architecture ◽  
Convolutional Codes ◽  
Stopping Rules ◽  
Iterative Decoders ◽  
Turbo Decoder ◽  
Turbo Decoders ◽  
Implementation Aspects

This paper gives a general overview of the implementation aspects of turbo decoders. Although the parallel architecture of the turbo code is emphasized, the serial concatenated convolutional codes for the turbo decoder are discussed too. Considering the general structure of iterative decoders, the main features of the soft input and soft output algorithm, which are the heart of a turbo decoder, are observed. The efficient parallel architectures of turbo decoders are shown which allow high speed implementation. Apart from these, implementation aspects like quantization issues and stopping rules to increase the throughput as well as an evaluation of the various turbo decoders are discussed. Finally, we suggest a number of solutions to overcome the implementation issues as well as the complexities without affecting the high throughput rate. DOI: http://dx.doi.org/10.3329/bjsir.v47i3.13068 Bangladesh J. Sci. Ind. Res. 47(3), 327-332 2012

scholarly journals Coding Techniques using IDMA OFDM MIMO for Underwater Wireless Acoustic Communication

2020 ◽  
Vol 8 (5) ◽  
pp. 3968-3973
Keyword(s):  
High Speed ◽  
Turbo Code ◽  
High Capacity ◽  
Ldpc Code ◽  
Data Rate ◽  
Underwater Communication ◽  
Available Bandwidth ◽  
Mimo Ofdm ◽  
High Speed Data ◽  
Communication Demands

Future Underwater communication demands high speed data transmission. Present Underwater communication can only provide a limited data rate, where the available bandwidth is limited. To increase the data rate, we simulate the MIMO-OFDM with IDMA technique. In MIMO method many transmitter and many receiver antennas are present. MIMO method offer a very high capacity which raises linearly with the numeral of antennas. Data rate increases with MIMO method, bandwidth is saved and fading is reduced with OFDM. In OFDM technique the complete sign orthogonally overlays in a frequency field that secures the bandwidth. IDMA system is constructed on interleaving procedure. In this paper different coding techniques Convolutional, RS code, LDPC code, Turbo code with IDMA OFDM MIMO technique are compared. IDMA OFDM MIMO with Turbo code, BER performance is improved up to 10-6 .

Reliability Analysis of Turbo Code for High-Speed Underwater Acoustic Communication Based on OFDM

2013 ◽  
Vol 475-476 ◽  
pp. 832-837
Author(s):  
Lin Zhou ◽  
Lan Jun Liu ◽  
Shu Kai Chi
Keyword(s):  
Acoustic Communication ◽  
Orthogonal Frequency Division Multiplexing ◽  
High Speed ◽  
Data Transfer ◽  
Turbo Code ◽  
Rapid Development ◽  
Underwater Acoustic Communication ◽  
Underwater Acoustic ◽  
Advantages And Disadvantages ◽  
Coding Scheme

With the rapid development of OFDM (Orthogonal Frequency Division Multiplexing) technology and its own advantages, this technology has been studied actively in underwater acoustic communication recently to improve the data transfer rate and reliability. This paper introduces the key technology of high speed OFDM underwater acoustic communication, analyzes the advantages and disadvantages, design a high-speed underwater acoustic OFDM communication coding scheme based on TURBO code, and proceeding the simulation and analysis for the OFDM system. Finally, the reliability of TURBO code in high speed underwater acoustic OFDM communication is analyzed.

scholarly journals A Study on Interleave Division Multiple Access

2018 ◽  
pp. 180-183
Author(s):  
Chirag R Shah
Keyword(s):  
Turbo Codes ◽  
Multiple Access ◽  
High Speed ◽  
Turbo Code ◽  
Coding Gain ◽  
Broadband Communication ◽  
Data Rates ◽  
Wireless Broadband ◽  
Access Technique ◽  
Multiple Access Technique

As wireless broadband communication has been experiencing a tremendous growth in past few year, the demands for various new & advanced multiple access techniques is increasing consistently. We can experience many new multiple access techniques in 3G & 4G. Here in this article we propose the multiple access technique IDMA which was developed with the view of achieving something more in terms of speed and capacity then what we had in 3G. The most important in IDMA is turbo-code which has increased the efficiency of 4G to a larger extent. By using these turbo codes with interleave division multiple excess the data rates 4G technology has been increased significantly. The basic idea behind this article is to lead down how by using interleaver division multiple accesses we can achieve higher coding gain, capacity, high speed (both for uploading & downloading) by using turbo codes along with IDMA.

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