基于DS-CDMA系统的PDA+LDPC双迭代接收机.pdf基于DS-CDMA系统的PDA+LDPC

文件名称: 基于DS-CDMA系统的PDA+LDPC双迭代接收机.pdf

所属分类: 其它

开发工具:

文件大小: 263kb

下载次数: 0

上传时间: 2019-10-09

提供者: weixin_********

下载 (263kb)

不能下载？报告错误

详细说明：基于DS-CDMA系统的PDA+LDPC双迭代接收机pdf,基于DS-CDMA系统的PDA+LDPC双迭代接收机PRODUCTSANDDSOLUITIONS CHINA NEW TELECOMMUNICATIONS 10 10 10 10 P=20.0 P20,Q=1 P=10,0=2 10 P=10,0=2 P5,Q= 2 P5,0=4 10 P=4,Q=5 P2,0=10 0.5 3.5 4.5 55 信噪比信噪比图3p=0.2时PDA+LDPC双选代接收机的系统性能图4p=07时PDA+DPC双选代接收机的系统性能 9 q 1/2 LDPC LDPC VND PDA H800036 CND L=8000。 . PDA p1;=1≤i CND j≤8。 LDPC 20 p FA PDa L+ A 2-c ∑ h记←c ∈Ct, C P=0. 2 PDA+LDPC 0.2 Ai nt-tanh tanh/ku,c, PDA LDPC PDA VND CND LDPC PDA P=0.7 PDA+LDPC l+ h,←-e P=5 O=4 C n 0.7 PDA P-20 LDPC PDA K=8 90 CHINA NEW TELECOMMUNICATIONS OCtober 2009 C1994-2011ChinaAcademicJournalElcctronicPublishingHousc.Allrightsrescrvcd.http://www.cnki.net PRODUCTS AND SOLUTIONS 2 LDPC PDA+LDPC PDA DS- CDMA I1 Yang L Soo KK Siu Y M Hybrid rcduccd - complexity multiuser dctcctor for CDMA communication systcms. IEEE Transactions on Vehicular Technology 2008 57 I 414-420 [2] Mohammad M Buehrer R. The effects of ordering criteria in linear successive interference cancellation in CDMA systems. IEEE Transactions on Wireless Communications 2008 7 11 4128-4132 [3] Dexu L D Joon L T A variational inference framework for soft-input soft-out detection in multiple-access channels. IEEE Transac- tions on Information Theory 2009 55 5 2345~2364 [4 Bogdan C Daniel R Benoit E. Turbu receivers for interleave-divisiunn multiple-access systeNs. IEEE TransacLiunis unl Communica tions20095772090~2097 [5 Luo J Pattipati K Willett P Ilasegawa F Near-optimal multiuser detection in synchronous CDMA using probabilistic data associa- tion. EeE Communications letters 2001 59 361-363 16 Richardson T Urbanke R. Capacity of low density parity check codes under message passing decoding. IEEE Transaction on Informa tion Theory 2001 472 599--6l8 Chung sY Richardson T Urbanke R. Analysis of sum- product decoding of low- density parity check codes using a Gaussia ation. IEEE Transaction on Information Theory 2001 47 2 657-670 PDA+LDPC Doubly- Ite ra tive Rece iver based on ds-CDMa Sys te ms Mei Zhonghui Li Xiaofei College of Telecommunication and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003 China Abs tract This paper presents the PDa+LDPC doubly- iterative receiver for the DS-CDMA systems. The proposed doubly iterative receiver is constituted by the Probabilistic Data Association Detector PDa and the ldpc decoder PDA detector and ldpc decoder can exchange in formation through outer loup to improve the performance uf the system. The LDPC decoder is made up by the variable Node Decoder VND and Check Node Decoder CND. During each outer loop. VND and CND can exchange information through some number of inner loops. This paper considers the performance of the systems by choosing different number of inner loops and outer loops on the condition of the total determined ldPc decoding iteration numbers. The research results demonstrate that when the Multi-user Access Interference MAI is less, better performance can be obtained by decreasing the number of inner loops (increasing the number of outer loops); conversely, properly incrcasing the number of inner loops decreasing the number of outer loops can achieve some performance gains Key words doubly- iterative receiver probabilistic data association detector algorithm LDPC 2009915 2009.10 91 C1994-2011ChinaAcademicJournalElcctronicPublishingHousc.Allrightsrescrvcd.http://www.cnki.net

(系统自动生成,下载前可以参看下载内容)