为降低信道均衡算法的复杂度，提出了一种适于LDPC（Low—Density Parity—Check）编码MIMO（Multi—Input Multi，Output）信道的基于迭代式概率数据辅助（PDA：Probabilistie Data Association）的次优软输出判决反馈均衡算法。滑动窗...为降低信道均衡算法的复杂度，提出了一种适于LDPC（Low—Density Parity—Check）编码MIMO（Multi—Input Multi，Output）信道的基于迭代式概率数据辅助（PDA：Probabilistie Data Association）的次优软输出判决反馈均衡算法。滑动窗PDA检测器输出外信息作为软输入软输出LDPC信道解码器的先验信息，实现信道均衡与信道解码的联合信息更新，克服传统判决反馈均衡器误差传播的缺陷。仿真表明，泼均衡算法性能要比V—BLAST迫零检测算法提高1—2dB，当Eb／No为3dB时，误比特率达到10^-5且算法复杂度仪为O（N^3），可获得较为满意的码间干扰消除效果。展开更多
In this paper a low-density pairwise check(LDPC) coded three-way relay system is considered, where three user nodes desire to exchange messages with the help of one relay node. Since physical-layer network coding is a...In this paper a low-density pairwise check(LDPC) coded three-way relay system is considered, where three user nodes desire to exchange messages with the help of one relay node. Since physical-layer network coding is applied, two time slots are sufficient for one round information exchange. In this paper, we present a decode-and-forward(DF) scheme based on joint LDPC decoding for three-way relay channels, where relay decoder partially decodes the network code rather than fully decodes all the user messages. Simulation results show that the new DF scheme considerably outperforms other common schemes in three-way relay fading channels.展开更多
文摘为降低信道均衡算法的复杂度，提出了一种适于LDPC（Low—Density Parity—Check）编码MIMO（Multi—Input Multi，Output）信道的基于迭代式概率数据辅助（PDA：Probabilistie Data Association）的次优软输出判决反馈均衡算法。滑动窗PDA检测器输出外信息作为软输入软输出LDPC信道解码器的先验信息，实现信道均衡与信道解码的联合信息更新，克服传统判决反馈均衡器误差传播的缺陷。仿真表明，泼均衡算法性能要比V—BLAST迫零检测算法提高1—2dB，当Eb／No为3dB时，误比特率达到10^-5且算法复杂度仪为O（N^3），可获得较为满意的码间干扰消除效果。
基金supported in part by the National Natural Science Foundation of China under Grant 61201187by the Importation and Development of High-Caliber Talents Project of Beijing Municipal Institutions under Grant YETP0110+2 种基金by the Tsinghua University Initiative Scientific Research Program under Grant 20121088074by the Foundation of Zhejiang Educational Committee under Grant Y201121579by the Visiting Scholar Professional Development Project of Zhejiang Educational Committee under Grant FX2014052
文摘In this paper a low-density pairwise check(LDPC) coded three-way relay system is considered, where three user nodes desire to exchange messages with the help of one relay node. Since physical-layer network coding is applied, two time slots are sufficient for one round information exchange. In this paper, we present a decode-and-forward(DF) scheme based on joint LDPC decoding for three-way relay channels, where relay decoder partially decodes the network code rather than fully decodes all the user messages. Simulation results show that the new DF scheme considerably outperforms other common schemes in three-way relay fading channels.
