Pub Date : 2003-04-09DOI: 10.1109/ICCT.2003.1209856
Jun Song, Yu-yu Gan, Zijun Wu
Hybrid fiber coaxial (HFC) network has recently emerged as a promising access network infrastructure for the delivery of voice, video and high-speed data traffic. This paper first described the activity of cable modem termination system (CMTS) and cable modem (CM). Then the effect of the upstream bandwidth resource allocation mechanism based on request/transmit policy on the performance of asymmetric data application is analyzed. An active grant upstream bandwidth allocation policy is proposed to improve the performance of asymmetric data application over the HFC networks. The simulation result is also given.
{"title":"Improving the performance of asymmetric data application over the HFC network","authors":"Jun Song, Yu-yu Gan, Zijun Wu","doi":"10.1109/ICCT.2003.1209856","DOIUrl":"https://doi.org/10.1109/ICCT.2003.1209856","url":null,"abstract":"Hybrid fiber coaxial (HFC) network has recently emerged as a promising access network infrastructure for the delivery of voice, video and high-speed data traffic. This paper first described the activity of cable modem termination system (CMTS) and cable modem (CM). Then the effect of the upstream bandwidth resource allocation mechanism based on request/transmit policy on the performance of asymmetric data application is analyzed. An active grant upstream bandwidth allocation policy is proposed to improve the performance of asymmetric data application over the HFC networks. The simulation result is also given.","PeriodicalId":237858,"journal":{"name":"International Conference on Communication Technology Proceedings, 2003. ICCT 2003.","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126596633","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}
Pub Date : 2003-04-09DOI: 10.1109/ICCT.2003.1209817
Xianbin Wang, Yiyan Wu, B. Caron
A transmitter identification system using embedded spread spectrum sequence is proposed in this paper. Principles of the proposed technique is illustrated through an example of digital TV (DTV) transmitters identification. Code generators in Matlab are developed to study the auto-correlation and cross-correlation properties of the Gold and Kasami sequences. Spread spectrum sequences with different periods are generated and simulated. To speed-up the identification process, the embedded spread spectrum sequence is preferred to be time-synchronized with the DTV signal. By doing so, code length has to be truncated before it is fitted into each field of the ATSC DTV signal. The impact of truncation noise and in-band DTV interference on transmitter identification is also investigated in this paper. It is shown that the auto-correlation and cross-correlation properties are only slightly affected by truncation noise. It is also shown that the dominant interference to the transmitter identification is the in-band DTV signal. The signal to truncation noise ratio and signal to DTV interference ratio in the correlation output are derived and verified form the simulation results. It is further recognized that in-band DTV interference can only be mitigated by increasing the code length or by time-domain averaging technique to smoothen out the in-band interference.
{"title":"Transmitter identification using embedded spread spectrum sequences","authors":"Xianbin Wang, Yiyan Wu, B. Caron","doi":"10.1109/ICCT.2003.1209817","DOIUrl":"https://doi.org/10.1109/ICCT.2003.1209817","url":null,"abstract":"A transmitter identification system using embedded spread spectrum sequence is proposed in this paper. Principles of the proposed technique is illustrated through an example of digital TV (DTV) transmitters identification. Code generators in Matlab are developed to study the auto-correlation and cross-correlation properties of the Gold and Kasami sequences. Spread spectrum sequences with different periods are generated and simulated. To speed-up the identification process, the embedded spread spectrum sequence is preferred to be time-synchronized with the DTV signal. By doing so, code length has to be truncated before it is fitted into each field of the ATSC DTV signal. The impact of truncation noise and in-band DTV interference on transmitter identification is also investigated in this paper. It is shown that the auto-correlation and cross-correlation properties are only slightly affected by truncation noise. It is also shown that the dominant interference to the transmitter identification is the in-band DTV signal. The signal to truncation noise ratio and signal to DTV interference ratio in the correlation output are derived and verified form the simulation results. It is further recognized that in-band DTV interference can only be mitigated by increasing the code length or by time-domain averaging technique to smoothen out the in-band interference.","PeriodicalId":237858,"journal":{"name":"International Conference on Communication Technology Proceedings, 2003. ICCT 2003.","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122265976","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}
Pub Date : 2003-04-09DOI: 10.1109/ICCT.2003.1209698
Xiaohui Xu, Dong Liang, Hongqi Jiang, Xiaokang Lin
Broadband wireless access systems are members of a large class of shared medium access systems where a single central site communicates with multiple subscriber stations over a single transmission medium. This article introduces a novel method of sharing the single transmission medium with a number of subscriber stations in fixed BWA systems, which supports integrated voice/data transport and dynamic bandwidth allocation. A MAC implementation in 3.5 GHz fixed BWA system is given, which focuses on the dynamic access technology of voice. FDD/TDM/TDMA mode is applied in the system. In the end of this article, block diagrams describing how voice access PSTN through E1 interface are given.
{"title":"Dynamic bandwidth allocation in fixed BWA systems","authors":"Xiaohui Xu, Dong Liang, Hongqi Jiang, Xiaokang Lin","doi":"10.1109/ICCT.2003.1209698","DOIUrl":"https://doi.org/10.1109/ICCT.2003.1209698","url":null,"abstract":"Broadband wireless access systems are members of a large class of shared medium access systems where a single central site communicates with multiple subscriber stations over a single transmission medium. This article introduces a novel method of sharing the single transmission medium with a number of subscriber stations in fixed BWA systems, which supports integrated voice/data transport and dynamic bandwidth allocation. A MAC implementation in 3.5 GHz fixed BWA system is given, which focuses on the dynamic access technology of voice. FDD/TDM/TDMA mode is applied in the system. In the end of this article, block diagrams describing how voice access PSTN through E1 interface are given.","PeriodicalId":237858,"journal":{"name":"International Conference on Communication Technology Proceedings, 2003. ICCT 2003.","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121095019","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}
Pub Date : 2003-04-09DOI: 10.1109/ICCT.2003.1209896
Shuangchun Liang, Weilin Wu
This paper gives a new CDMA receiver combining multistage parallel interference cancellation that is one of multiuser detection methods and antenna array. The linear parallel interference cancellation (PIC) scheme is described using matrix algebra, so it is combined with multiple antennas as a linear space-time detector. This receiver is based on minimizing the mean-squared error (MMSE) criteria to get all user data. The weights for the receiver structure can be found by the steepest descent method that is a novel trained adaptive algorithms, then used to combine the soft-decision output user data after antenna array and multistage parallel interference cancellation processing. At last, the computer simulation result is given, shows good performance of this receiver to resist multipath effect.
{"title":"The performance analysis of a receiver with combining multistage parallel interference cancellation and antenna array","authors":"Shuangchun Liang, Weilin Wu","doi":"10.1109/ICCT.2003.1209896","DOIUrl":"https://doi.org/10.1109/ICCT.2003.1209896","url":null,"abstract":"This paper gives a new CDMA receiver combining multistage parallel interference cancellation that is one of multiuser detection methods and antenna array. The linear parallel interference cancellation (PIC) scheme is described using matrix algebra, so it is combined with multiple antennas as a linear space-time detector. This receiver is based on minimizing the mean-squared error (MMSE) criteria to get all user data. The weights for the receiver structure can be found by the steepest descent method that is a novel trained adaptive algorithms, then used to combine the soft-decision output user data after antenna array and multistage parallel interference cancellation processing. At last, the computer simulation result is given, shows good performance of this receiver to resist multipath effect.","PeriodicalId":237858,"journal":{"name":"International Conference on Communication Technology Proceedings, 2003. ICCT 2003.","volume":"683 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116110373","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}
Pub Date : 2003-04-09DOI: 10.1109/ICCT.2003.1209170
Yun Wang, Qingji Zeng
In this paper, the dynamic routing and wavelength assignment issues in WDM optical networks are investigated under self-similar traffic for the first time. In terms of blocking probability, numerical simulation results are presented to analyze the dynamic performance versus the Hurst parameter and variance parameter under different routing schemes. In addition, differences are also given to compare the dynamic performance between under the self-similar traffic model and under the Poisson traffic model.
{"title":"Dynamic blocking performance in WDM networks under self-similar traffic","authors":"Yun Wang, Qingji Zeng","doi":"10.1109/ICCT.2003.1209170","DOIUrl":"https://doi.org/10.1109/ICCT.2003.1209170","url":null,"abstract":"In this paper, the dynamic routing and wavelength assignment issues in WDM optical networks are investigated under self-similar traffic for the first time. In terms of blocking probability, numerical simulation results are presented to analyze the dynamic performance versus the Hurst parameter and variance parameter under different routing schemes. In addition, differences are also given to compare the dynamic performance between under the self-similar traffic model and under the Poisson traffic model.","PeriodicalId":237858,"journal":{"name":"International Conference on Communication Technology Proceedings, 2003. ICCT 2003.","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121384652","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}
Pub Date : 2003-04-09DOI: 10.1109/ICCT.2003.1209796
Huijing Dou, Shuxun Wang, Fei Wang
A special four-order time-average moment spectrum approach is proposed for estimating cubic nonlinear coupling. It can be applied to obtain the coupled and coupling frequencies in the noise that any mean multiplicative and additive noises are mutually independent, the multiplicative noises are correlative. In the meantime, this method needn't constrain the distribution and the color noises. Simulation examples illustrate the algorithms.
{"title":"Cubic nonlinear coupling estimation in correlative multiplicative noise","authors":"Huijing Dou, Shuxun Wang, Fei Wang","doi":"10.1109/ICCT.2003.1209796","DOIUrl":"https://doi.org/10.1109/ICCT.2003.1209796","url":null,"abstract":"A special four-order time-average moment spectrum approach is proposed for estimating cubic nonlinear coupling. It can be applied to obtain the coupled and coupling frequencies in the noise that any mean multiplicative and additive noises are mutually independent, the multiplicative noises are correlative. In the meantime, this method needn't constrain the distribution and the color noises. Simulation examples illustrate the algorithms.","PeriodicalId":237858,"journal":{"name":"International Conference on Communication Technology Proceedings, 2003. ICCT 2003.","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116773949","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}
Pub Date : 2003-04-09DOI: 10.1109/ICCT.2003.1209905
Bian Dongming, Yi Xinying
In this paper, we propose a new time-domain estimator for OFDM signal by using over-sample technology. The proposed estimator is able to achieve wider estimation range of carrier frequency offset with higher accuracy than cyclic prefix (CP) based estimator. And the results of computer emulation show the estimator gets over the impact of carrier frequency offset and achieves the same accuracy in different offsets.
{"title":"A new approach for carrier frequency offset estimation in OFDM communication system","authors":"Bian Dongming, Yi Xinying","doi":"10.1109/ICCT.2003.1209905","DOIUrl":"https://doi.org/10.1109/ICCT.2003.1209905","url":null,"abstract":"In this paper, we propose a new time-domain estimator for OFDM signal by using over-sample technology. The proposed estimator is able to achieve wider estimation range of carrier frequency offset with higher accuracy than cyclic prefix (CP) based estimator. And the results of computer emulation show the estimator gets over the impact of carrier frequency offset and achieves the same accuracy in different offsets.","PeriodicalId":237858,"journal":{"name":"International Conference on Communication Technology Proceedings, 2003. ICCT 2003.","volume":" 33","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114051139","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}
Pub Date : 2003-04-09DOI: 10.1109/ICCT.2003.1209879
Zhou Hua
Signal-to-interference ratio (SIR) is a very important metric of communication link quality. For wireless cellular systems, several control mechanism, such as power control, rate control, and allocation of radio resource are based on SIR estimation. In previous research, most of researches concentrate on WCDMA system in which pilot symbol is time-multiplexed with data symbol, this method is not feasible for cdma2000 system where pilot symbol is code-multiplexed with data symbol. This paper first develops SIR estimators based on reverse pilot channel and then derives the approximate analytic expression for its mean squared error (MSE) function, the accuracy of which is validated through simulation. It is shown that the MSE of the new SIR estimator is significantly smaller than the MSE of other widely used SIR estimators, especially in low SIR case.
{"title":"Traffic channel SIR estimation based on reverse pilot channel","authors":"Zhou Hua","doi":"10.1109/ICCT.2003.1209879","DOIUrl":"https://doi.org/10.1109/ICCT.2003.1209879","url":null,"abstract":"Signal-to-interference ratio (SIR) is a very important metric of communication link quality. For wireless cellular systems, several control mechanism, such as power control, rate control, and allocation of radio resource are based on SIR estimation. In previous research, most of researches concentrate on WCDMA system in which pilot symbol is time-multiplexed with data symbol, this method is not feasible for cdma2000 system where pilot symbol is code-multiplexed with data symbol. This paper first develops SIR estimators based on reverse pilot channel and then derives the approximate analytic expression for its mean squared error (MSE) function, the accuracy of which is validated through simulation. It is shown that the MSE of the new SIR estimator is significantly smaller than the MSE of other widely used SIR estimators, especially in low SIR case.","PeriodicalId":237858,"journal":{"name":"International Conference on Communication Technology Proceedings, 2003. ICCT 2003.","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114263031","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}
Pub Date : 2003-04-09DOI: 10.1109/ICCT.2003.1209765
Changqing Yin, Shao-yin Huang, P. Su, Chuanshan Gao
Technological advances have been made in the development of low-cost sensor devices equipped with wireless network interfaces. Large-scale sensor networks may be used for applications spanning several domains including military, medical, industrial, and home networks. In order to constrain communication overhead, large-scale sensor networks call for new and highly efficient methods for distributing queries to nodes that have observed interesting events in the network. In this paper, we present a heuristic secure routing on the diameter (SRD). It provides scalable and efficient data delivery from the source node to the destination node with low overhead. It also proposes a new token mechanism to solve the security of sensor network.
{"title":"Secure routing for large-scale wireless sensor networks","authors":"Changqing Yin, Shao-yin Huang, P. Su, Chuanshan Gao","doi":"10.1109/ICCT.2003.1209765","DOIUrl":"https://doi.org/10.1109/ICCT.2003.1209765","url":null,"abstract":"Technological advances have been made in the development of low-cost sensor devices equipped with wireless network interfaces. Large-scale sensor networks may be used for applications spanning several domains including military, medical, industrial, and home networks. In order to constrain communication overhead, large-scale sensor networks call for new and highly efficient methods for distributing queries to nodes that have observed interesting events in the network. In this paper, we present a heuristic secure routing on the diameter (SRD). It provides scalable and efficient data delivery from the source node to the destination node with low overhead. It also proposes a new token mechanism to solve the security of sensor network.","PeriodicalId":237858,"journal":{"name":"International Conference on Communication Technology Proceedings, 2003. ICCT 2003.","volume":"550 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114278860","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}
Pub Date : 2003-04-09DOI: 10.1109/ICCT.2003.1209026
Ramjee Prasad, Marina Ruggieri
The main steps of the evolution from the current heterogeneous wireless networks towards the future integrated-services multimedia network are highlighted in the paper. In particular, the development of mobile networks from second to third generation is considered, and the vision beyond third generation is given together with the related major technical challenges.
{"title":"Future trends in the wireless multimedia environment","authors":"Ramjee Prasad, Marina Ruggieri","doi":"10.1109/ICCT.2003.1209026","DOIUrl":"https://doi.org/10.1109/ICCT.2003.1209026","url":null,"abstract":"The main steps of the evolution from the current heterogeneous wireless networks towards the future integrated-services multimedia network are highlighted in the paper. In particular, the development of mobile networks from second to third generation is considered, and the vision beyond third generation is given together with the related major technical challenges.","PeriodicalId":237858,"journal":{"name":"International Conference on Communication Technology Proceedings, 2003. ICCT 2003.","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133603603","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}
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