scholarly journals Efficiency of the LDPC Codes in the Reduction of PAPR in Comparison to Turbo Codes and Concatenated Turbo-Reed Solomon Codes in a MIMO-OFDM System

2010 ◽  
pp. 1005-1009 ◽  
Author(s):  
T. Velmurugan ◽  
S. Balaji ◽  
Anita Sarah Rennie ◽  
D. Sumathi
Keyword(s):  
Turbo Codes ◽  
Ldpc Codes ◽  
Ofdm System ◽  
Reed Solomon Codes ◽  
Mimo Ofdm

Improvement of LDPC Codes Decoding Algorithm in the Application of the Rotational OFDM System

2014 ◽  
Vol 934 ◽  
pp. 235-238
Author(s):  
Zeng You Sun ◽  
Huan Huan Li
Keyword(s):  
Turbo Codes ◽  
Computational Cost ◽  
Ldpc Codes ◽  
Bp Algorithm ◽  
Ofdm System ◽  
Decoding Algorithm ◽  
Ldpc Decoding ◽  
Rotational Modulation ◽  
Channel Environment ◽  
Better Than

Because the performance of LDPC codes is better than Turbo codes, convolution codes, etc., so the combination of LDPC codes and the OFDM technology has higher effectiveness. Traditional LDPC decoding algorithm (BP algorithm) exists large amounts of multiplication, division and index calculation, and when decoding cycle, its computational cost will increase exponentially, which not only increases the complexity, and makes the numerical stability of the algorithm deteriorates, therefore, in this paper, we propose an improved decoding algorithm, namely the combination algorithm of Offset-BP-base and Offset BP. In the AWGN channel environment and the rotational modulation of OFDM, compared with LLR BP algorithm and BP-based algorithm, the improved algorithm improves the performance of the system, and the complexity is reduced.

Transmission Performance of Space Time Block Coding with Grouped Phase Rotation for Asymmetric MIMO-OFDM System

2011 ◽  
Vol E94-B (12) ◽  
pp. 3540-3549
Author(s):  
Akinori NAKAJIMA ◽  
Kenichiro TANAKA ◽  
Akinori OHASHI ◽  
Hiroshi HATTORI ◽  
Akihiro OKAZAKI ◽  
...  
Keyword(s):  
Space Time ◽  
Ofdm System ◽  
Time Block ◽  
Transmission Performance ◽  
Block Coding ◽  
Phase Rotation ◽  
Space Time Block Coding ◽  
Mimo Ofdm

Experimental Investigation of Joint Decoding in Overloaded MIMO-OFDM System

2013 ◽  
Vol E96.B (12) ◽  
pp. 3101-3107 ◽  
Author(s):  
Tatsuro YABE ◽  
Mamiko INAMORI ◽  
Yukitoshi SANADA
Keyword(s):  
Experimental Investigation ◽  
Ofdm System ◽  
Joint Decoding ◽  
Mimo Ofdm
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