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Article Navigation >  Journal of University of Electronic Science and Technology of China  > 2008  >  37(4): 481-484

SHI Zhi-ping, ZHU Nan, LI Shao-qian. Optimization Design of a Class of Generalized RA Codes[J]. Journal of University of Electronic Science and Technology of China, 2008, 37(4): 481-484.
Citation: SHI Zhi-ping, ZHU Nan, LI Shao-qian. Optimization Design of a Class of Generalized RA Codes[J]. Journal of University of Electronic Science and Technology of China, 2008, 37(4): 481-484.
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Optimization Design of a Class of Generalized RA Codes

  • 1.

    National Key Laboratory of Communications,University of Electronic Science and Technology of China Chengdu 610054;

  • 2.

    National Mobile Communications Research Laboratory,Southeast University Nanjing 210096

  • Received Date: 2007-04-02
  • Rev Recd Date: 2007-09-13
  • Publish Date: 2008-08-15
  • The systematic generalized repeat-accumulate (GRA) code is constituted by a repeater, an interleaver, a combiner and a generalized accumulator. Under the belief propagation (BP) decoding of low density parity check (LDPC) codes, the performance of the GRA codes be affected by small cycles of the sparse parity check matrix which depends on encoding method. In this paper we present an optimized method for a class of GRA codes design. The parity check matrix is constructed based on the joint design between interleaver and combiner under the demand of no 4-cycles. With the simple encoding, simulation results show that the class of GRA codes outperforms conventional RA codes.
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  • 1. 

    沈阳化工大学材料科学与工程学院 沈阳 110142

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Optimization Design of a Class of Generalized RA Codes

  • 1. National Key Laboratory of Communications,University of Electronic Science and Technology of China Chengdu 610054;
  • 2. National Mobile Communications Research Laboratory,Southeast University Nanjing 210096
  • Received Date: 2007-04-02
  • Rev Recd Date: 2007-09-13
  • Publish Date: 2008-08-15

Abstract: The systematic generalized repeat-accumulate (GRA) code is constituted by a repeater, an interleaver, a combiner and a generalized accumulator. Under the belief propagation (BP) decoding of low density parity check (LDPC) codes, the performance of the GRA codes be affected by small cycles of the sparse parity check matrix which depends on encoding method. In this paper we present an optimized method for a class of GRA codes design. The parity check matrix is constructed based on the joint design between interleaver and combiner under the demand of no 4-cycles. With the simple encoding, simulation results show that the class of GRA codes outperforms conventional RA codes.

SHI Zhi-ping, ZHU Nan, LI Shao-qian. Optimization Design of a Class of Generalized RA Codes[J]. Journal of University of Electronic Science and Technology of China, 2008, 37(4): 481-484.
Citation: SHI Zhi-ping, ZHU Nan, LI Shao-qian. Optimization Design of a Class of Generalized RA Codes[J]. Journal of University of Electronic Science and Technology of China, 2008, 37(4): 481-484.
shu

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