To obtain a robust physical-layer network coding (PLNC) for two-way relaying system, the authors propose a low-density parity-check (LDPC) coded PLNC scheme with phase pre-rotation to combat the carrier phase asynchro...
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To obtain a robust physical-layer network coding (PLNC) for two-way relaying system, the authors propose a low-density parity-check (LDPC) coded PLNC scheme with phase pre-rotation to combat the carrier phase asynchronous in the multiple access stage. At two users, each modulation symbol is rotated according to a predefined incremental phase without the knowledge of carrier phase difference. decoding simulation and numerical analysis are carried out to evaluate this joint LDPC and PLNC scheme with phase pre-rotation. simulation results show that this strategy can achieve a significant improvement and a good trade-off between performance and complexity. Protograph-based extrinsic information transfer analysis demonstrates the proposed scheme is robust, which is consistent with the simulation results.
A kind of regular LDPC codes is introduced. Its error correct ability is better than Turbo codes' and near to Shannon limit (1.2 dB). The construct of the sparse parity matrix is important. This effects the LDPC c...
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ISBN:
(纸本)9780769536798
A kind of regular LDPC codes is introduced. Its error correct ability is better than Turbo codes' and near to Shannon limit (1.2 dB). The construct of the sparse parity matrix is important. This effects the LDPC codes' error correct ability. In this paper, diagonal method is adopted to construct sparse check mainly of (n,3,6) in approximate lower triangular form by it. This meets the numbers of nonzero elements and randomness. The Belief Propagation algorithm is used in decoding simulation, to this, vector method is proposed which reduces operation time.
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