scholarly journals Performance Evolution of Modern Error Controlling Codes for future generation (5G) cellular systems: LDPC code

2020 ◽  
Author(s):  
Pradeep M Shah ◽  
Prakash D Vyavahare ◽  
Anjana Jain
Keyword(s):  
Wireless Communication ◽  
Turbo Codes ◽  
Communication Systems ◽  
Ldpc Codes ◽  
Ldpc Code ◽  
Future Generation ◽  
Cellular Systems ◽  
Next Generation ◽  
Cell Network ◽  
Channel Codes

Abstract Modern error controlling codes, like a Low-Density Parity Check (LDPC) codes, assume a significant job in a next-generation wireless system like 5G for improved channel error controlling ability. Execution of Turbo codes(3G), Polar codes(4G) and LDPC (5G) codes are near to Shannon’s limit channel codes and in this manner are being utilized in next-generation wireless communication systems. This paper emphasis around modern cellular cell network, LDPC codes and their performance using EXIT chart is presented. Likewise, a similar exhibition assessment of LDPC codes and the decisions of error controlling codes for the future generation cell systems are talked about in the paper. Such an investigation will be helpful in the choice of legitimate LDPC codes for the next-generation wireless communication system.

scholarly journals MIMO-Filtered OFDM System Improvement Using Modified Concatenated RS/LDPC Codes

2021 ◽  
Author(s):  
Ghasan Ali Hussain
Keyword(s):  
Wireless Communication ◽  
Communication Systems ◽  
Ldpc Codes ◽  
Ldpc Code ◽  
Error Rates ◽  
Wireless Communication Systems ◽  
Ofdm System ◽  
Rs Codes ◽  
Concatenated Code ◽  
Ber Performance

Abstract In mobile communication systems, there are errors that will be generated in the digital signal due to fading and interference. Consequently, different techniques are used to improve the system's reliability and enhance the signal's robustness. Channel coding techniques are used to enhance the system reliability of 5G wireless communication systems . In the upcoming wireless technologies, LDPC codes are still introduced as an alternative to turbo codes. However, the error floor phenomenon is one of the biggest demerits of using LDPC code in the different communication systems that need low error rates. This paper uses RS codes with LDPC codes in a concatenated code to solve this demerit of LDPC codes. Meanwhile, a modified concatenated RS/LDPC codes are created using outer RS codes with inner LDPC codes then appended by interleaver, unlike the conventional concatenated codes that use the interleaver between both codes. Thereafter, the modified concatenated RS/LDPC codes were suggested to enhance BER performance for the f-OFDM system. The results showed that using the proposed concatenated code outperformed using single and familiar concatenated RS/LDPC code in terms of improving BER performance. Meanwhile, the proposed system achieved lower OOBE values than the conventional OFDM system. Therefore, the resulted system can be introduced as a competitor candidate for 5G wireless communication systems due to these features

The Research of LDPC Code in Communication System

2012 ◽  
Vol 532-533 ◽  
pp. 1135-1139
Author(s):  
Dan Hu
Keyword(s):  
Communication System ◽  
Channel Coding ◽  
Iterative Decoding ◽  
Storage System ◽  
Ldpc Codes ◽  
Ldpc Code ◽  
Optical Fiber Communication ◽  
Difficult Problem ◽  
Low Density ◽  
Channel Codes

Low-Density Parity-Check(LDPC) codes are a class of channel codes based on matrix encoding and iterative decoding. It has low decoding complexity as well as capacity approaching performance. Until now, the best designed LDPC codes can achieve the performance within only 0.0045dB of the Shannon limit. With the in-depth study, the encoding complexity of LDPC codes is not a difficult problem for application any more. Today, we can see LDPC codes widely used in many practical systems, such as wireless communication system, deep-space communication system, optical-fiber communication system and media storage system. This thesis first introduces the development of channel coding, and then the basic principles and concepts of LDPC codes. The following parts discuss several techniques of LDPC codes, including the construction methods of low-density parity matrix, the iterative decoding algorithms and performance analysis methods. Besides, we propose our opinions and our improved algorithms.

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