检索结果-南通市图书馆

Coded Modulation Faster-than-Nyquist Transmission with Precoder and channel shortening Optimization

China Communications 2021年第2期18卷 49-64页

作者： Hui Che Yong Bai School of Information and Communication Engineering Beijing University of Posts and TelecommunicationsBeijing 100876China School of Information and Communication Engineering Hainan UniversityHaikou 570228China

Faster-than-Nyquist(FTN)signaling can improve the spectrum efficiency(SE)of the transmission *** this paper,we propose a coded modulation FTN(CM-FTN)transmission scheme with precoder and channel shortening(CS)optimization to improve bit error rate(BER)performance and reduce the complexity of FTN *** our proposal,the information rate(IR)or spectral efficiency(SE)is employed and verified as a better performance metric for CM-FTN than the minimum Euclidian distance(MED).The precoder of CM-FTN is optimized for maximizing the IR criterion using the bare-bones particle swarm optimization(BB-PSO)***,a three-carrier CM-FTN system model is used to capture the broadening effect of *** targeting for the IR maximization,the inter-symbol interference(ISI)length for CS is optimized to reduce the receiver complexity without performance *** results demonstrate that our method has a 0.6dB precoding gain compared with the nonprecoding scheme and a maximum of 87.5%of the complexity of FTN equalizer is reduced without BER loss.

关键词： faster-than-Nyquist coded modulation information rate minimum Euclidian distance precoder channel shortening

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

M-BCJR Algorithm with channel shortening Based on Ungerboeck Observation Model for Faster-than-Nyquist Signaling

引用

China Communications 2021年第4期18卷 88-98页

The M-BCJR algorithm based on the Ungerboeck observation model is a recent study to reduce the computational complexity for faster-than-Nyquist(FTN)signaling[1].In this paper,we propose a method that can further reduce the complexity with the approximately same or better bit error rate(BER)performance compared to[1].The information rate(IR)loss for the proposed method is less than 1%compared to the true achievable IR(AIR).The proposed improvement is mainly by introducing channel shortening(CS)before the M-BCJR *** our proposal,the Ungerboeck M-BCJR algorithm and CS can work together to defeat severe inter-symbol interference(ISI)introduced by FTN *** ISI length for the M-BCJR algorithm with CS is optimized based on the criterion of the IR *** the two cases=0.5 and=0.35,compared to Ungerboeck M-BCJR without CS benchmark[1],the computational complexities of Ungerboeck M-BCJR with CS are reduced by 75%.Moreover,for the case=0.35,the BER performance of Ungerboeck M-BCJR with CS outperforms that of the conventional M-BCJR in[1]at the low signal to noise ratio region.

关键词： M-BCJR Ungerboeck model channel shortening FTN reduced-complexity turbo equalization

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

基于信道短化和圆球译码的水声通信迭代序列检测

引用

哈尔滨工程大学学报（英文版） 2024年第1期23卷 238-246页

作者：瞿逢重方浩涂星滨魏艳章旻昊杨劭坚 The Engineering Research Center of Oceanic Sensing Technology and Equipment Ministry of EducationZhoushan 316021China The Key Laboratory of Ocean Observation-Imaging Testbed of Zhejiang Province Zhejiang UniversityZhoushan 316021China Hainan Institute of Zhejiang University Sanya 572025China

The demand for high-data-rate underwater acoustic communications(UACs)in marine development is increasing;however,severe multipaths make demodulation a *** decision feedback equalizer(DFE)is one of the most popular equalizers in UAC;however,it is not the optimal *** maximum likelihood sequence estimation(MLSE)is the optimal algorithm,its complexity increases exponentially with the number of channel taps,making it challenging to apply to ***,this paper proposes a complexity-reduced MLSE to improve the bit error rate(BER)performance in multipath *** the proposed algorithm,the original channel is first shortened using a channel-shortening method,and several dominant channel taps are selected for ***,sphere decoding(SD)is performed in the following *** are applied to eliminate inter-symbol interference caused by weak channel *** simulation and sea experiment demonstrate the superiority of the proposed *** simulation results show that channel shortening combined with SD can drastically reduce computational complexity,and iterative SD performs better than DFE based on recursive least squares(RLS-DFE),DFE based on improved proportionate normalized least mean squares(IPNLMS-DFE),and channel estimation-based DFE(CE-DFE).Moreover,the sea experimental results at Zhairuoshan Island in Zhoushan show that the proposed receiver scheme has improved BER performance over RLSDFE,IPNLMS-DFE,and *** with the RLS-DFE,the BER,after five iterations,is reduced from 0.0076 to 0.0037 in the 8–12 k Hz band and from 0.1516 to 0.1145 in the 13–17 k Hz band at a distance of 2000 ***,the proposed algorithm makes it possible to apply MLSE in UAC in practical scenarios.

关键词： Underwater acoustic communications(UACs) Maximum likelihood sequence estimation(MLSE) channel shortening Sphere decoding(SD) Iterative detection

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The Equalization Performance of RAKE Receiver in UWB system

The Equalization Performance of RAKE Receiver in UWB system

引用

第七届国际信号处理会议

作者： Liang Zhang Chenyang Yang Beijing University of Aeronautics and Astronautics in P.R.China Email: liangzbhu@*** cyyang@***

AKE receiver is often used to collect multipath energy and alleviate fading through diversity, especially in the ultra-wide band (UWB) radio system, which has extremely low power spectral density (

关键词： ?Ultra-wide band (UWB) RAKE receiver channel shortening

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：