收藏 | 论文排版

Dynamic Bit Allocation MC-CDMA for NGN

乌切纳(Uchennaya Obo Ibom)  
【摘要】: Third Generation (3G) mobile communication technologies like CDMA2000,WCDMA are already in deployment in many countries and TD-SCDMA will soon be deployed in China in addition with other technologies. These are changing the way we communicate,conduct business,access information,and being entertained over the multimedia super highway.3G services enable users to make video calls to the office and surf the net simultaneously, or play interactive game wherever they may be.Although bandwidth of current 3G technologies promise burst rates up to 384Kb/s and 2Mb/s for vehicular and indoor applications respectively, the average throughput per user is not expected to be more than 171Kb/s during the peak hours.This bandwidth is adequate to meet the needs for voice, basic data communication and wireless internet access,but not enough for new interactive multimedia services such as multi-parity video conference.As such there is demand to develop a new physical layer that can give higher bandwidth.These future networks have been termed NGN (Next Generation Networks).The main features of such a system will be greater capacity and access speed in the downlink.The vision of NGN wireless/mobile systems will be the provision of broadband access,seamless global roaming,and Internet/data/voice everywhere,utilizing for each the most appropriate always connected technology. Multi-Carrier Code Division Multiple Access (MC-CDMA) is a promising candidate for the air interface of NGN wireless networks.MC-CDMA is essentially an Orthogonal Frequency Division Multiplexing (OFDM) technique where the individual data symbols are spread using a spreading code in the frequency domain.The spreading code associated with MC-CDMA provides a multiple access technique as well as interference suppression.It is very efficient in spectrum usage and it is very effective in spectrum selective channel.The NGN networks are predicted to provide packet data transmission rates of 5Mbps in outdoor-macro-cellular environments and up 20Mbps in indoor-micro-cellular environments. In MC-CDMA systems,a number of sub carriers per user are used for the high-rate data transmission,and each data modulated by a different sub carrier is transmitted through a different frequency band.Each data undergoes a different channel condition and arrives with a different error rate at the base station.By transmitting message data through all the sub channels based on the Channel State Information (CSI),a new data transmission scheme called "Dynamic Bit Allocation Multicarrier Code Division Multiple Access for Next Generation Networks" is introduced in this dissertation. In this system,the CSI is assumed to be known to the transmitter. Then the base station transmits the data based on the CSI by using the principle of dynamic bit allocation. Simulated results have shown that adaptive MC-CDMA yields a higher system capacity than a conventional MC-CDMA.

中国期刊全文数据库 前20条
1 ZHAOSONG LI;DAN LU;YIMING HE;FANGYUAN MENG;XULIANG ZHOU;JIAOQING PAN;;InP-based directly modulated monolithic integrated few-mode transmitter[J];Photonics Research;2018年05期
2 ;On Practical Issues of Adaptive Modulation in OFDM Systems[J];The Journal of China Universities of Posts and Telecommunications;2005年01期
3 张志珂;刘宇;安俊明;张一鸣;赵泽平;刘建国;祝宁华;;112 Gbit/s transmitter optical subassembly based on hybrid integrated directly modulated lasers[J];Chinese Optics Letters;2018年06期
4 ;Simplified transmitter design for MIMO systems with channel uncertainty[J];The Journal of China Universities of Posts and Telecommunications;2009年02期
5 董昊;张洪明;郎凯;余冰雁;姚敏玉;;OFDM visible light communication transmitter based on LED array[J];Chinese Optics Letters;2014年05期
6 吴绍华;张钦宇;张乃通;;Effects of transmitter-related parameter settings on ranging accuracy for IR-UWB systems[J];Journal of Harbin Institute of Technology;2010年01期
7 蒋俊;赵裔;邵轲;陈虎;夏伶俐;洪志良;;A 16.3 p J/pulse low-complexity and energy-efficient transmitter with adjustable pulse parameters[J];半导体学报;2011年06期
8 Zhenhai Chen;Zongguang Yu;Jinghe Wei;Dejin Zhou;Xiaobo Su;Jiaxuan Zou;;A 4 Gbps current-mode transmitter for 12-bit 250 MSPS ADC[J];Journal of Semiconductors;2017年08期
9 苏源;向济璇;沈骁樱;叶凡;任俊彦;;Design of a 1.12Gb/s 11.3mW low-voltage differential signaling transmitter[J];Journal of Semiconductors;2015年04期
10 LIU Shan;WANG XinAn;SHEN JinPeng;WANG Bo;YE Tao;HUANG Ru;;A novel low-noise high-linearity CMOS transmitter for mobile UHF RFID reader[J];Science China(Information Sciences);2014年08期
11 韩越;乔树山;黑勇;;An all-digital synthesizable baseband for a delay-based LINC transmitter with reconfigurable resolution[J];Journal of Semiconductors;2014年11期
12 赵锦鑫;颜峻;石寅;;A-3 dBm RF transmitter front-end for 802.11g application[J];Journal of Semiconductors;2013年04期
13 ;A current-mode RF transmitter for 6–9 GHz MB-OFDM UWB application[J];Science China(Information Sciences);2011年02期
14 陈云锋;高亭;李巍;李宁;任俊彦;;A dual-mode 6-9 GHz transmitter for OFDM-UWB[J];半导体学报;2011年05期
16 ;8GHz Rural Telephone Transmission System[J];固体电子学研究与进展;1989年03期
18 李歆;付健;黄煜梅;洪志良;;CMOS highly linear direct-conversion transmitter for WCDMA with fine gain accuracy[J];半导体学报;2011年08期
19 段吉海;王志功;李智群;;A 3-5 GHz TH-UWB transmitter in 0.18-μm RF CMOS technology[J];半导体学报;2009年07期
20 高俊明;昌庆江;王涛;苏翼凯;;A cost-effective 100-Gb/s transmitter with low-speed optoelectronic devices and high spectral efficiency[J];Chinese Optics Letters;2008年08期
中国重要会议论文全文数据库 前10条
1 ;On Wireless Channel[A];2002海峡两岸三地无线科技研讨会论文集[C];2002年
2 ;A Double Power Supply Network Design for Muti-Channel Transmitter Based on HART[A];第24届中国控制与决策会议论文集[C];2012年
3 G.Q.Xue;X.Li·H.J.Quan;S.Jaggar;N.N.Zhou;;Physical simulation and application of a new TEM configuration[A];中国科学院地质与地球物理研究所2012年度(第12届)学术论文汇编——固体矿产资源研究室[C];2013年
4 赵婧;;A New Design Of Unitary Space-time Constellations[A];2006通信理论与技术新进展——第十一届全国青年通信学术会议论文集[C];2006年
5 ;Dynamics and Synchronization of Semiconductor Lasers[A];第二届全国复杂动态网络学术论坛论文集[C];2005年
6 Guo-qiang Xue;Nan-Nan Zhou;Wei-ying Chen;Hai Li;Shu Yan;;Research on the Application of a 3-m Transmitter Loop for TEM Surveys in Mountainous Areas[A];中国科学院地质与地球物理研究所2014年度(第14届)学术年会论文汇编——固体矿产资源研究室[C];2015年
7 Min Zeng;Ying Luo;Qiumei Guo;Hong Jiang;;Power Allocation for Energy Harvesting-based D2D Communication Underlaying Cellular Network[A];第36届中国控制会议论文集(E)[C];2017年
8 Jin-Sheng WU;Michael SINISCALCHI;Nan WANG;Jia-Wei GU;Ferdin S VILM;Elizabeth C CROPPER;Klaudiusz R WEISS;Jian JING;;Functional implications of distinct transmitter phenotypes in higher-order interneurons[A];中国神经科学学会第十届全国学术会议论文摘要集[C];2013年
9 哀微;;A New Macroscopic Multiple Input Multiple Output (MIMO) System[A];2005通信理论与技术新进展——第十届全国青年通信学术会议论文集[C];2005年
10 Wang Huan;Lv Tao-mei;Tao Jiang-ping;;Research on intellectualization of 126kV SF_6 circuit breaker[A];第26届中国控制与决策会议论文集[C];2014年
中国博士学位论文全文数据库 前3条
1 乌切纳(Uchennaya Obo Ibom);[D];北京邮电大学;2010年
2 Kashif Azim Janjua;[D];北京邮电大学;2008年
3 Mala Umar Mustapha Bakura;[D];北京邮电大学;2012年
中国硕士学位论文全文数据库 前10条
1 MICK WILFRD MVOUNDZA;[D];华中科技大学;2008年
2 MUTANGANA EUGENE;[D];南京理工大学;2017年
3 森特;[D];长春理工大学;2012年
4 伊森;基于宽带无线接入系统的OFDM新的信道估计和同步技术[D];华东理工大学;2010年
5 Zeeshan Samad;[D];上海交通大学;2015年
6 Fahad Sahito;[D];北京邮电大学;2016年
7 Mohammed Khalfan Amour;[D];华中科技大学;2008年
8 吴劲波;SerDes接口电路中transmitter模块的低功耗设计[D];电子科技大学;2014年
9 赵娜;SYMBOL公司基于胜任特征模型的中层管理者培训体系建构[D];山东大学;2015年
10 Ahmed Mohamed Ali Abdelrahman;[D];湖南大学;2011年
中国重要报纸全文数据库 前6条
1 薛以辉;Symbol Mobius系统降低费用[N];中国计算机报;2002年
2 本报记者 吴萍;合作生财[N];计算机世界;2005年
3 易水;IT新词集锦(407)[N];计算机世界;2004年
4 吴海菁;Symbol专利挑战Wi-Fi世界[N];电脑报;2004年
5 ;认识美国讯宝科技公司[N];中国商报;2005年
6 闫冰;专利官司又来了[N];网络世界;2007年
 快捷付款方式  订购知网充值卡  订购热线  帮助中心
  • 400-819-9993
  • 010-62982499
  • 010-62783978