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- Title
半双工译码转发中继信道下的空间耦合.
- Authors
刘 洋; 李进达; 王 斌; ,张育芝
- Abstract
The design method of capacity-approaching spatially coupled RA(SC-RA) codes for half-duplex decode-and-forward relay channel is proposed. For binary erasure channels, the source node sends one SCRA code to the relay node and the destination node respectively. After receiving the information from the source node, the relay node first correctly recovers the information and then encodes it to generate additional check bits sent to the destination node. The destination node can correctly recover the information from the source node by combining the additional check bits sent by the relay node with the information sent by the source node. To evaluate the asymptotic performances of the proposed SC-RA codes in the three-node relay channel, a modified density evolution algorithm is derived to compute the decoding thresholds. The threshold analysis results show that the proposed SC-RA codes can approach the capacity of the source-to-relay link and the source-to-destination link simultaneously. Moreover, the decoding performances over the binary erasure half-duplex relay channels are also simulated to demonstrate the threshold analysis results. Simulation results show that the bit error rate performance of the designed SC-RA codes is consistent with the decoding thresholds obtained by the Derived Density Evolution Algorithm, the codes exhibit excellent capacity-approaching performances and also are better than spatially coupled low density parity check(LDPC) codes.
- Publication
Telecommunication Engineering, 2024, Vol 64, Issue 4, p584
- ISSN
1001-893X
- Publication type
Article
- DOI
10.20079/j.issn.1001-893x.221208004