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Critical Scan Path Based Energy Efficient LDPC Decoder using DD-BMP?

Journal: International Journal of Computer Science and Mobile Computing - IJCSMC (Vol.3, No. 10)

Publication Date:

Authors : ; ; ; ;

Page : 879-888

Keywords : Binary messages; energy-efficient; high throughput; LDPC codes;

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A low-density parity-check (LDPC) code is a method of transmitting a message over a noisy transmission channel that are well known for their near-capacity error correction capabilities under iterative message-passing decoding. The inherently parallel nature of these codes allows very high throughput to be achieved. In the existing method energy-efficient architectures for decoders of low-density parity check (LDPC) codes using the Modified differential decoding with binary message passing (MDD-BMP) algorithm is used. This algorithm offer significant intrinsic advantages in the energy domain: simple computations, low interconnect complexity, and very high throughput. Using the MDD-BMP algorithm, these decoders achieve respective areas of 0.28mm2 , 1.38mm2 and 15.37mm2 , average throughputs of 37 Gbps, 75 Gbps, and 141Gbps, and energy efficiencies of 4.9 pJ/bit, 13.2 pJ/bit, and 37.9pJ/bit with a 1.0 V supply voltage in post-layout simulations. At a reduced supply voltage of 0.8 V, these decoders achieve respective throughputs of 26 Gbps, 54 Gbps, and 94 Gbps, and energy efficiencies of 3.1 pJ/bit, 8.2 pJ/bit, and 23.5 pJ/bit. A new algorithm is proposed in which a scan path is added before input is processed which maximizes the throughput than existing method. For 1.0V the average throughputs are 39Gbps, 78Gbps and 145Gbps and for 0.8V the average throughputs are 29Gbps, 58Gbps and 97Gbps.

Last modified: 2014-11-02 18:24:02