CAJ | 학술논문

为了更有效地对放大转发双向中继信道进行估计，对级联卷积信道的稀疏特性进行了分析，并基于其稀疏性，采用压缩感知技术，通过合理地设计导频将合成级联卷积信道分解成2个独立的级联卷积信道分别进行信道估计。研究分析和仿真结果表明，级联卷积信道具有稀疏性且其稀疏度在一定范围内变化。所提的方案只需在端节点对级联卷积信道进行估计就可以完成双向信息的交换，提高了频谱效率，降低了信道估计误差，并且无需信道稀疏度的先验信息。
위료경유효지대방대전발쌍향중계신도진행고계，대급련권적신도적희소특성진행료분석，병기우기희소성，채용압축감지기술，통과합리지설계도빈장합성급련권적신도분해성2개독립적급련권적신도분별진행신도고계。연구분석화방진결과표명，급련권적신도구유희소성차기희소도재일정범위내변화。소제적방안지수재단절점대급련권적신도진행고계취가이완성쌍향신식적교환，제고료빈보효솔，강저료신도고계오차，병차무수신도희소도적선험신식。
The sparsity of concatenated convolutional channel in two-way amplify-and-forward relay was analyzed. Through the appropriate design of the pilot, the synthetic concatenated convolutional channels could be decomposed into two independent concatenated convolutional channels for channel estimation. Theoretical analysis and simulation results show that the concatenated convolutional channel possesses sparsity which varies within a range. The proposed scheme completes the two-way exchange of information by finishing concatenated convolutional channel estimation in end nodes. Without the priori information of the channel sparsity, this scheme improves the utilization of spectrum resources and the performance of channel estimation.