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Performance Analysis of Ensemble of Long Irregular LDPC Code over various Channels with Cut off Rate

Madhusmita Mishra, Sarat Kumar Patra, Ashok Kumar Turuk Published in Wireless

International Journal of Applied Information Systems
Year of Publication: 2012
© 2012 by IJAIS Journal
10.5120/ijais12-450824
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  1. Madhusmita Mishra, Sarat Kumar Patra and Ashok Kumar Turuk. Article: Performance Analysis of Ensemble of Long Irregular LDPC Code over various Channels with Cut off Rate. International Journal of Applied Information Systems 4(8):26-31, December 2012. BibTeX

    @article{key:article,
    	author = "Madhusmita Mishra and Sarat Kumar Patra and Ashok Kumar Turuk",
    	title = "Article: Performance Analysis of Ensemble of Long Irregular LDPC Code over various Channels with Cut off Rate",
    	journal = "International Journal of Applied Information Systems",
    	year = 2012,
    	volume = 4,
    	number = 8,
    	pages = "26-31",
    	month = "December",
    	note = "Published by Foundation of Computer Science, New York, USA"
    }
    

Abstract

A long Irregular LDPC code that performs at rates extremely close to the Shannon capacity has been taken. The code has carefully chosen degree patterns. Simulations has been done with Hard and Soft-decision decoding to compare the performance of this code with the rates 1/2 ,1/3, 1/4 ,2/3 ,2/5, 3/4, 3/5, 4/5, 5/6, 8/9 and 9/10 over various channels like AWGN channel, Rayleigh fading channel and Rician fading channel. The little dependence of BER performance on various channels is explored here along with the conjecture of the concept of computational cutoff rate that represents an upper limit on rate of transmission for practically instrumentable reliable communications.

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Keywords

LDPC (Low Density parity check), Upper Bound, Cut off Rate, Bhattacharyya bound, Hard-decision, Soft-decision