新型信道自适应编码协作体制
发布时间：2019-04-01 10:57
【摘要】：针对传统编码协作体制在信道条件动态变化的移动场景中存在较严重的性能损失问题,提出一种码率兼容低密度奇偶校验(LDPC)码与混合自动重传请求(HARQ)协议相结合的新型自适应编码协作体制。假设信道状态信息在每次传输时发生变化,通过不等长增量冗余的自动重传,协作节点与目的节点处的等效码率随信道条件变化而获得自适应非线性调整。推导所提体制的中断概率与吞吐量等系统性能表达式,并给出理论分析及仿真结果。实验结果表明,在适当的兼容码率设计下,所提体制与传统体制和等长传输体制相比较可有效降低系统中断概率,提高系统的吞吐量,改善移动环境下协作通信系统的传输可靠性。
[Abstract]:In view of the serious performance loss problem of traditional coded cooperative schemes in mobile scenarios with dynamic changes of channel conditions, A new adaptive coding cooperation scheme is proposed, which combines bit-rate compatible low-density parity-check (LDPC) codes with hybrid automatic retransmission request (HARQ) protocol. Assuming that the channel state information changes during each transmission, the adaptive nonlinear adjustment is obtained by automatically retransmitting the unequal length incremental redundancy, and the equivalent rate between the cooperative node and the destination node varies with the channel conditions. The performance expressions of the proposed system, such as interrupt probability and throughput, are derived, and the theoretical analysis and simulation results are given. The experimental results show that the proposed scheme can effectively reduce the interrupt probability and improve the throughput of the system compared with the traditional system and the equal length transmission scheme under the appropriate compatible rate design. Improve the transmission reliability of cooperative communication system in mobile environment.
【作者单位】： 厦门市移动多媒体通信重点实验室(华侨大学);综合业务网理论及关键技术国家重点实验室(西安电子科技大学);
【基金】：国家自然科学基金资助项目(61302095) 福建省自然科学基金资助项目(2014J01243,2014J05076) 华侨大学科研基金资助项目(13Y0384,12BS219)
【分类号】：TN911.22
[Abstract]:In view of the serious performance loss problem of traditional coded cooperative schemes in mobile scenarios with dynamic changes of channel conditions, A new adaptive coding cooperation scheme is proposed, which combines bit-rate compatible low-density parity-check (LDPC) codes with hybrid automatic retransmission request (HARQ) protocol. Assuming that the channel state information changes during each transmission, the adaptive nonlinear adjustment is obtained by automatically retransmitting the unequal length incremental redundancy, and the equivalent rate between the cooperative node and the destination node varies with the channel conditions. The performance expressions of the proposed system, such as interrupt probability and throughput, are derived, and the theoretical analysis and simulation results are given. The experimental results show that the proposed scheme can effectively reduce the interrupt probability and improve the throughput of the system compared with the traditional system and the equal length transmission scheme under the appropriate compatible rate design. Improve the transmission reliability of cooperative communication system in mobile environment.
【作者单位】： 厦门市移动多媒体通信重点实验室(华侨大学);综合业务网理论及关键技术国家重点实验室(西安电子科技大学);
【基金】：国家自然科学基金资助项目(61302095) 福建省自然科学基金资助项目(2014J01243,2014J05076) 华侨大学科研基金资助项目(13Y0384,12BS219)
【分类号】：TN911.22
【参考文献】
相关期刊论文 前2条
1 邓娜;张四海;周武e，
本文编号：2451501
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