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The Ninth International Conference onCommunications Systems, 2004. ICCS 2004.最新文献

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Generalized OFDM for bridging between OFDM and single-carrier transmission 用于桥接OFDM和单载波传输的广义OFDM
The Ninth International Conference onCommunications Systems, 2004. ICCS 2004. Pub Date : 2004-11-30 DOI: 10.1109/ICCS.2004.1359356
H. Gačanin, S. Takaoka, F. Adachi
{"title":"Generalized OFDM for bridging between OFDM and single-carrier transmission","authors":"H. Gačanin, S. Takaoka, F. Adachi","doi":"10.1109/ICCS.2004.1359356","DOIUrl":"https://doi.org/10.1109/ICCS.2004.1359356","url":null,"abstract":"One of the main problems of orthogonal frequency division multiplexing (OFDM) is high peak-to-average power ratio (PAPR). In this paper, a novel approach to alleviate the PAPR problem of OFDM is presented. A generalized OFDM (GOFDM) with frequency-domain equalization (FDE) is proposed. Various FDE techniques based on zero forcing (ZF), maximum ratio combining (MRC) and minimum mean square error (MMSE) are considered. The bit error rate (BER) performance of GOFDM in a frequency-selective fading channel is evaluated by computer simulation and compared with those of conventional OFDM and single-carrier (SC) transmission","PeriodicalId":333629,"journal":{"name":"The Ninth International Conference onCommunications Systems, 2004. ICCS 2004.","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116910647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 18
A novel error correction scheme based on the Chinese remainder theorem 基于中国剩余定理的一种新的误差校正方案
The Ninth International Conference onCommunications Systems, 2004. ICCS 2004. Pub Date : 2004-11-30 DOI: 10.1109/ICCS.2004.1359419
V. Goh, M. Tinauli, M. Siddiqi
{"title":"A novel error correction scheme based on the Chinese remainder theorem","authors":"V. Goh, M. Tinauli, M. Siddiqi","doi":"10.1109/ICCS.2004.1359419","DOIUrl":"https://doi.org/10.1109/ICCS.2004.1359419","url":null,"abstract":"The Chinese remainder theorem (CRT) plays an important role in error detection and correction in redundant residue number systems. This paper presents novel algorithms that significantly simplify the process of correcting both single and multiple errors based on the CRT. Proofs are provided for the new decoding techniques","PeriodicalId":333629,"journal":{"name":"The Ninth International Conference onCommunications Systems, 2004. ICCS 2004.","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130977812","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
A modified BER scheduling scheme for wireless multimedia access control protocol 一种改进的无线多媒体接入控制协议误码率调度方案
The Ninth International Conference onCommunications Systems, 2004. ICCS 2004. Pub Date : 2004-11-30 DOI: 10.1109/ICCS.2004.1359368
Fei Long, G. Feng, C. Siew
{"title":"A modified BER scheduling scheme for wireless multimedia access control protocol","authors":"Fei Long, G. Feng, C. Siew","doi":"10.1109/ICCS.2004.1359368","DOIUrl":"https://doi.org/10.1109/ICCS.2004.1359368","url":null,"abstract":"In future wireless networks, the packet scheduler needs to support heterogeneous classes of traffic with different BER and other QoS requirements. In this paper, we proposed a modified BER scheduling scheme for CDMA networks by combining the existing WISPER scheme with a two-state Markov chain channel model. Four error-deal algorithms are used in this scheme. Simulation experiments based on NS-2 illustrate that the modified scheme can achieve both lower packet loss ratio and lower packet delay compared to the original WISPER scheme","PeriodicalId":333629,"journal":{"name":"The Ninth International Conference onCommunications Systems, 2004. ICCS 2004.","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132015473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analytical estimate for nonlinear distortion dur to fiber in SCM-WDM lightwave system SCM-WDM光波系统中光纤非线性失真的分析估计
The Ninth International Conference onCommunications Systems, 2004. ICCS 2004. Pub Date : 2004-11-30 DOI: 10.1109/ICCS.2004.1359439
Linghao Cheng, S. Aditya
{"title":"Analytical estimate for nonlinear distortion dur to fiber in SCM-WDM lightwave system","authors":"Linghao Cheng, S. Aditya","doi":"10.1109/ICCS.2004.1359439","DOIUrl":"https://doi.org/10.1109/ICCS.2004.1359439","url":null,"abstract":"Lightwave systems using subcarrier multiplexing and wavelength division multiplexing can satisfy the growing requirements for broadband access to consumers. Here, using a general analytical method to estimate the nonlinear distortion in SCM-WDM lightwave systems, new results for intermodulation products (IMPs) are presented. This method takes into account both chromatic dispersion and Kerr effect in the fiber and leads to simple closed-form expressions. It provides us an efficient tool to predict the nonlinear intermodulation evolution in SCM lightwave system over fiber accurately. The results show the significance of 2nd and 3rd order IMPs for SCM-WDM and SCM radio-over-fiber systems, respectively. Our study shows that in standard single mode fiber (SSMF), the rapid increase of 3rd order IMPs sets an upper limit to the optical power that one can use in an SCM RoF system","PeriodicalId":333629,"journal":{"name":"The Ninth International Conference onCommunications Systems, 2004. ICCS 2004.","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132940665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Performance comparison of different MIMO configurations for downlink MC-CDMA systems 下行链路MC-CDMA系统不同MIMO配置的性能比较
The Ninth International Conference onCommunications Systems, 2004. ICCS 2004. Pub Date : 2004-11-30 DOI: 10.1109/ICCS.2004.1359383
Xiaoming Peng, Z. Lei, F. Chin
{"title":"Performance comparison of different MIMO configurations for downlink MC-CDMA systems","authors":"Xiaoming Peng, Z. Lei, F. Chin","doi":"10.1109/ICCS.2004.1359383","DOIUrl":"https://doi.org/10.1109/ICCS.2004.1359383","url":null,"abstract":"The multiple-input-multiple-output (MIMO) multicarrier-code division multiple access (MC-CDMA) system is a potential scheme for future mobile packet transmission. The consideration of performance and computational complexity of different MIMO system configurations leads to various applications. In this paper, the performance of V-BLAST scheme for coded MC-CDMA system and performance comparison of different MIMO MC-CDMA system configurations such as V-BLAST scheme and punctured STBC scheme have been investigated. The results show that punctured STBC scheme is better than V-BLAST scheme at the same transmitted data rate (same bandwidth efficiency) in terms-of performance and complexity. This is because punctured STBC scheme achieves higher diversity gain without inter-stream interference compared to V-BLAST scheme which has severe inter-stream interference and lower diversity gain. However, the punctured STBC scheme can only work with lower rate channel coding (for puncturing) and STBC coding rate for complex data is less than one for antennas more than two. Hence, it is suitable for inexpensive real-time applications with moderate data rate","PeriodicalId":333629,"journal":{"name":"The Ninth International Conference onCommunications Systems, 2004. ICCS 2004.","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133039010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Design criteria for reduced-complexity joint multiuser detection and group decoding 低复杂度联合多用户检测和组解码的设计准则
The Ninth International Conference onCommunications Systems, 2004. ICCS 2004. Pub Date : 2004-11-30 DOI: 10.1109/ICCS.2004.1359412
G. Corral-Briones
{"title":"Design criteria for reduced-complexity joint multiuser detection and group decoding","authors":"G. Corral-Briones","doi":"10.1109/ICCS.2004.1359412","DOIUrl":"https://doi.org/10.1109/ICCS.2004.1359412","url":null,"abstract":"Decision feedback multiuser detection with trellis code modulation (TCM) has been proposed to increase the spectral efficiency of bandlimited multiple-access channel (MAC) [(S. Marinkovic et al., 1999), (G. Corrall-Briones et al., 2001)]. In this paper, we investigate the design criteria to achieve good tradeoffs between performance and complexity for joint multiuser detection and group decoding (MD-GD) [(G. Corrall-Briones et al., 2001), (G. Corrall-Briones and M. Hueda, 2003)]. Two approaches are considered to improve the performance: reduced state algorithms and generalized Viterbi (GV) algorithms. In channels where the main perturbation is multiple-access interference, we show that performance can be further improved increasing the number of states of the channel rather than exploiting the coding information of more users. However, if error propagation is mitigated, additional coding information significantly improves performance. Numerical results show the good performance and low complexity of the MD-GD schemes designed from the new criteria introduced in this paper","PeriodicalId":333629,"journal":{"name":"The Ninth International Conference onCommunications Systems, 2004. ICCS 2004.","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122859632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
MPCP design in prototyping optical network unit of ethernet in the first mile 第一英里以太网光网络单元原型设计中的MPCP设计
The Ninth International Conference onCommunications Systems, 2004. ICCS 2004. Pub Date : 2004-11-30 DOI: 10.1109/ICCS.2004.1359351
Zhongjun Wang, Doreen Yeo, Xiaodan Gan, B. Zhao, Layhong Tan, J. Lam, Cheng Tee Hiang, R. Walia
{"title":"MPCP design in prototyping optical network unit of ethernet in the first mile","authors":"Zhongjun Wang, Doreen Yeo, Xiaodan Gan, B. Zhao, Layhong Tan, J. Lam, Cheng Tee Hiang, R. Walia","doi":"10.1109/ICCS.2004.1359351","DOIUrl":"https://doi.org/10.1109/ICCS.2004.1359351","url":null,"abstract":"Optical network unit (ONU) and optical line terminal (OLT) are two basic device elements in an Ethernet passive optical network (EPON). To support an optical multi-point network, the multi-point control protocol (MPCP) is being standardized in the IEEE 802.3ah task force (Ethernet in the first mile -EFM) by defining a multi-point MAC control sublayer as an extension of the existing MAC control sublayer (2003). In this paper, the design and implementation of MPCP as part of ONU prototyping for EFM are described. The design is undertaken on a platform integrated with an ARM processor and FPGA. The discussions focus on methods to improve operation efficiency and hardware/firmware co-design with a well-defined interface","PeriodicalId":333629,"journal":{"name":"The Ninth International Conference onCommunications Systems, 2004. ICCS 2004.","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123842789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Key distribution for conditional access system in DTV broadcasting 数字电视广播中条件接入系统的密钥分配
The Ninth International Conference onCommunications Systems, 2004. ICCS 2004. Pub Date : 2004-11-30 DOI: 10.1109/ICCS.2004.1359392
Tianpu Jiang, Shibao Zheng
{"title":"Key distribution for conditional access system in DTV broadcasting","authors":"Tianpu Jiang, Shibao Zheng","doi":"10.1109/ICCS.2004.1359392","DOIUrl":"https://doi.org/10.1109/ICCS.2004.1359392","url":null,"abstract":"In DTV broadcasting, key distribution is the essential part of the conditional access system (CAS), which is directly related with the security of CAS. In this paper, considering the inefficiency of the current CAS, a modified key distribution algorithm is put forward, in which the hierarchical access control technology is used to distribute the authorization keys of channels while the Chinese remainder theorem is adopted to distribute the group keys to the subscribers. The proposed algorithm is secure enough as well as greatly reducing the forward security problem. Moreover, the algorithm is flexible in dynamic management of subscriber. Most importantly, the algorithm is more efficient than the current CAS for fewer messages being transferred during key rekeying and system initializing, which greatly saves the bandwidth of the channel","PeriodicalId":333629,"journal":{"name":"The Ninth International Conference onCommunications Systems, 2004. ICCS 2004.","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121396077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
A power inversion adaptive flat array with two inverted-L elements 具有两个倒l单元的功率反转自适应平面阵列
The Ninth International Conference onCommunications Systems, 2004. ICCS 2004. Pub Date : 2004-11-30 DOI: 10.1109/ICCS.2004.1359445
A. Ikeda, K. Hirasawa
{"title":"A power inversion adaptive flat array with two inverted-L elements","authors":"A. Ikeda, K. Hirasawa","doi":"10.1109/ICCS.2004.1359445","DOIUrl":"https://doi.org/10.1109/ICCS.2004.1359445","url":null,"abstract":"This paper describes characteristics of a power inversion adaptive array (PIAA) for portable equipment. The antenna consists of two quarter-wavelength inverted-L antennas on a cellular-phone-sized rectangular conducting plate. The directional pattern is calculated with respect to the directions of a desired and an interference signal direction by a moment method (WIPL-D). The results show that the signal-to-interference ratio (SIR) is improved by using the PIAA","PeriodicalId":333629,"journal":{"name":"The Ninth International Conference onCommunications Systems, 2004. ICCS 2004.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129072846","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
End-to-end QoS of integrated multi-class traffic in a DiffServ network DiffServ网络中集成多类流量的端到端QoS
The Ninth International Conference onCommunications Systems, 2004. ICCS 2004. Pub Date : 2004-11-30 DOI: 10.1109/ICCS.2004.1359345
Lei Xiao, T. C. Wong, Y. Chew
{"title":"End-to-end QoS of integrated multi-class traffic in a DiffServ network","authors":"Lei Xiao, T. C. Wong, Y. Chew","doi":"10.1109/ICCS.2004.1359345","DOIUrl":"https://doi.org/10.1109/ICCS.2004.1359345","url":null,"abstract":"Integrated service has provision for end-to-end QoS to applications over the network. However, it has the problem of scalability. On the other hand, differentiated service enforces the handling of traffic aggregation to provide IP QoS with scalability. In this paper, we present an end-to-end admission control scheme with integrated multi-class traffic in a DiffServ network. This scheme can achieve the QoS requirements of each class which include real-time and non-real-time traffic. Simulation results show that the scheme provides flexible and efficient end-to-end multi-class QoS guarantee over a DiffServ network","PeriodicalId":333629,"journal":{"name":"The Ninth International Conference onCommunications Systems, 2004. ICCS 2004.","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116728400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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