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Creeper: an algorithm for decoding convolutional codes 爬行器:一种解码卷积码的算法
The 8th International Conference on Communication Systems, 2002. ICCS 2002. Pub Date : 2002-11-25 DOI: 10.1109/ICCS.2002.1182492
V. Imtawil
{"title":"Creeper: an algorithm for decoding convolutional codes","authors":"V. Imtawil","doi":"10.1109/ICCS.2002.1182492","DOIUrl":"https://doi.org/10.1109/ICCS.2002.1182492","url":null,"abstract":"There are two main strategies for decoding convolutional codes: the well-known Viterbi algorithm and sequential decoding. This paper presents a comparison of Creeper, an algorithm for sequential decoding, and the Viterbi algorithm. Creeper is an algorithm which combines the best properties of both the stack and the Fano algorithms. It requires less memory than the stack algorithm and has no backward moves as in the Fano algorithm. Some results of simulation show that Creeper is an interesting alternative to the Viterbi algorithm.","PeriodicalId":401041,"journal":{"name":"The 8th International Conference on Communication Systems, 2002. ICCS 2002.","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125691117","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: 1
Effect of employing beamforming on OFDM systems in Rician channel 采用波束形成技术对正交频分复用系统的影响
The 8th International Conference on Communication Systems, 2002. ICCS 2002. Pub Date : 2002-11-25 DOI: 10.1109/ICCS.2002.1182437
W. T. Ng, V. Dubey
{"title":"Effect of employing beamforming on OFDM systems in Rician channel","authors":"W. T. Ng, V. Dubey","doi":"10.1109/ICCS.2002.1182437","DOIUrl":"https://doi.org/10.1109/ICCS.2002.1182437","url":null,"abstract":"We analyze the inter-carrier-interference (ICI) caused by multiple Rician path and Doppler spreading in orthogonal frequency division multiplexing (OFDM) systems. The general form for the ICI power is derived by taking into consideration the correlation equation of the Rician channel. We have derived a equation for estimating the frequency tracking parameter. We also present examples by using ideal beamforming at the mobile. For a multiple Rician channel, it shows that the reduction in ICI power is not as much as in the case of Rayleigh channel. However, in the presence of only one Rician path, the reduction in ICI power is marginally better than the Rayleigh channel.","PeriodicalId":401041,"journal":{"name":"The 8th International Conference on Communication Systems, 2002. ICCS 2002.","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128100995","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 code grouping interference cancellation receiver in OVSF DS-CDMA downlink 一种用于OVSF DS-CDMA下行链路的码组干扰消除接收机
The 8th International Conference on Communication Systems, 2002. ICCS 2002. Pub Date : 2002-11-25 DOI: 10.1109/ICCS.2002.1183216
Won Ha, Junghwa Bae, Jinwoo Park
{"title":"A code grouping interference cancellation receiver in OVSF DS-CDMA downlink","authors":"Won Ha, Junghwa Bae, Jinwoo Park","doi":"10.1109/ICCS.2002.1183216","DOIUrl":"https://doi.org/10.1109/ICCS.2002.1183216","url":null,"abstract":"This paper presents the interference cancellation receiver for direct sequence code division multiple access (DS-CDMA) downlink channel with orthogonal variable spreading factor (OVSF) channelization code. The proposed receiver uses code grouping by the correlation property between OVSF mother and child codes. The proposed CGIC receiver does not requires the code information and activity of other user. The CGIC receiver has a lower computational complexity than other multiuser interference cancellation receivers. In the computer simulation results, the proposed receiver demonstrated huge performance improvement over the conventional matched filter receiver, RAKE receiver and serial interference cancellation (SIC) receiver in a multipath channel.","PeriodicalId":401041,"journal":{"name":"The 8th International Conference on Communication Systems, 2002. ICCS 2002.","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127471153","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: 5
A CSMA/CP MAC protocols for IP over WDM metropolitan area ring networks 基于WDM城域环网的CSMA/CP MAC协议
The 8th International Conference on Communication Systems, 2002. ICCS 2002. Pub Date : 2002-11-25 DOI: 10.1109/ICCS.2002.1183326
Chien-Chun Li, S. Kau, W. Hwang
{"title":"A CSMA/CP MAC protocols for IP over WDM metropolitan area ring networks","authors":"Chien-Chun Li, S. Kau, W. Hwang","doi":"10.1109/ICCS.2002.1183326","DOIUrl":"https://doi.org/10.1109/ICCS.2002.1183326","url":null,"abstract":"To solve the explosively growth of the Internet demands, metropolitan area networks (MAN) use SONET to provide huge bandwidth. However, the SONET network is suitable for constant bit rate (CBR) traffic. Therefore, it cannot effectively handle the burst-natured metropolitan area networks traffic. This paper proposed a novel MAN network architecture and protocol by using the wavelength division multiplexing (WDM) technique to efficiently share the network bandwidth among every network nodes. The proposed novel network architecture adopts carrier sense multiple access with carrier preemption (CSMA/CP) that is a media access control (MAC) protocol to handle the variable size IP packet transport on WDM MAN ring network. This paper also shows the simulation results to verify the proposed MAC protocol is able to take more efficiently utilization and lower packet latency. Further developments are proposed to improve the efficiency and add new capabilities such as QoS.","PeriodicalId":401041,"journal":{"name":"The 8th International Conference on Communication Systems, 2002. ICCS 2002.","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124279383","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: 10
Reliability of the resource sharing backup connections 资源共享备份连接的可靠性
The 8th International Conference on Communication Systems, 2002. ICCS 2002. Pub Date : 2002-11-25 DOI: 10.1109/ICCS.2002.1183276
W. Ahmad, J. Ni
{"title":"Reliability of the resource sharing backup connections","authors":"W. Ahmad, J. Ni","doi":"10.1109/ICCS.2002.1183276","DOIUrl":"https://doi.org/10.1109/ICCS.2002.1183276","url":null,"abstract":"Although cost effective. it is very likely in resource sharing restoration scenarios that the insufficient backup resources on certain links may lead to an unsuccessful recovery. Achieving the required reliability level is an important consideration in selecting a path for a backup connection. We present a technique to calculate the reliability of a session connection, which consists of a primary and a backup connection, which can also be used to check the suitability of a path to be used as a backup connection.","PeriodicalId":401041,"journal":{"name":"The 8th International Conference on Communication Systems, 2002. ICCS 2002.","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124446826","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
On periodic punctured binary complementary sequence pairs 周期穿刺二进制互补序列对
The 8th International Conference on Communication Systems, 2002. ICCS 2002. Pub Date : 2002-11-25 DOI: 10.1109/ICCS.2002.1182448
Ting Jiang, Xiao-qun Zhao, Lan-tian Hou
{"title":"On periodic punctured binary complementary sequence pairs","authors":"Ting Jiang, Xiao-qun Zhao, Lan-tian Hou","doi":"10.1109/ICCS.2002.1182448","DOIUrl":"https://doi.org/10.1109/ICCS.2002.1182448","url":null,"abstract":"A new kind of periodic complementary sequence is defined, named periodic punctured binary complementary sequence pair (PPCSP), for which some properties and existence conditions are derived. With these properties and existence conditions, some optimal PPCSPs with length N /spl les/ 15, searched on computer, are presented.","PeriodicalId":401041,"journal":{"name":"The 8th International Conference on Communication Systems, 2002. ICCS 2002.","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122908074","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
A novel fuzzy evaluation method to evaluate the reliability of FIN 提出了一种新型的模糊评价方法来评价飞机起落架的可靠性
The 8th International Conference on Communication Systems, 2002. ICCS 2002. Pub Date : 2002-11-25 DOI: 10.1109/ICCS.2002.1183333
Fan Hehong, Sun Xiaohan, Zhang Ming-de
{"title":"A novel fuzzy evaluation method to evaluate the reliability of FIN","authors":"Fan Hehong, Sun Xiaohan, Zhang Ming-de","doi":"10.1109/ICCS.2002.1183333","DOIUrl":"https://doi.org/10.1109/ICCS.2002.1183333","url":null,"abstract":"Based on fuzzy theory, we present the novel concept that a complex system should be described with multiple state linguistic terms (SLT). A network performability index given, the reliability indices of the object with multiple working-state are defined for the first time. On the grounds of linguistic cloud model (LCM), a fuzzy evaluation method for the network reliability is introduced. The method is used to examine the reliability of the fiber industry network (FIN) by way of Monte Carlo simulations. The results for FIN show that the method is efficient for reliability evaluation of industrial control networks thus can be used as a tool to design highly reliable industry networks.","PeriodicalId":401041,"journal":{"name":"The 8th International Conference on Communication Systems, 2002. ICCS 2002.","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121485980","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: 5
Designing SMS applications for public transport service system in Singapore 新加坡公共交通服务系统的SMS应用设计
The 8th International Conference on Communication Systems, 2002. ICCS 2002. Pub Date : 2002-11-25 DOI: 10.1109/ICCS.2002.1183218
Lim Tai Ching, H. K. Garg
{"title":"Designing SMS applications for public transport service system in Singapore","authors":"Lim Tai Ching, H. K. Garg","doi":"10.1109/ICCS.2002.1183218","DOIUrl":"https://doi.org/10.1109/ICCS.2002.1183218","url":null,"abstract":"Short Message Service (SMS) in wireless systems provides the capability of limited-size data messages to subscriber's cellular phone. And the development of value added services based upon the GSM standard is becoming increasingly important to both network operators and the subscribers to such networks. This paper outlines a wireless service system capable of providing real time information of the public transport service system in Singapore. The system allows a subscriber to the service to receive travel information on demand. primarily by means of short messages delivered to their GSM mobile phone. Most importantly. this system integrates bus and mass rapid transit information together in contrast to the existing SMS service on bus guide by SingTel, a leading telecom company in Singapore where it only provides bus information. The system also provides bus arrival information that allows a subscriber to acquire the arrival times of bus services at a bus stop. In addition, a subscriber is able to flag a bus through SMS while on the way to the bus stop and while a subscriber is reaching a particular bus stop, he/she will be alerted through SMS by the system. In this paper, a working prototype is designed to realise all possible factors of the system.","PeriodicalId":401041,"journal":{"name":"The 8th International Conference on Communication Systems, 2002. ICCS 2002.","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121799287","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: 23
Characterization of class-based traffic flows in multiservice IP networks 多业务IP网络中基于类的流量特征
The 8th International Conference on Communication Systems, 2002. ICCS 2002. Pub Date : 2002-11-25 DOI: 10.1109/ICCS.2002.1182495
I. Atov, R.J. Harris
{"title":"Characterization of class-based traffic flows in multiservice IP networks","authors":"I. Atov, R.J. Harris","doi":"10.1109/ICCS.2002.1182495","DOIUrl":"https://doi.org/10.1109/ICCS.2002.1182495","url":null,"abstract":"Recently, a framework for the development of multiservice IP networks based on a mixture of DiffServ-based QoS management and MPLS-based traffic engineering has been defined. This approach is based on the aggregation of individual flows into classes and on the provisioning of QoS to the class instead of a single flow. With these developments, it is important to model and characterize the traffic flows on a per class basis in order to plan and manage these networks to meet performance objectives (QoS) as required by various traffic classes. This paper addresses the problem of characterizing class-based traffic flows in a multiservice IP network. It provides simple models that can be used to take measurement-based data and translate it into a form that is suitable for implementing dimensioning and planning functions in these networks.","PeriodicalId":401041,"journal":{"name":"The 8th International Conference on Communication Systems, 2002. ICCS 2002.","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123537488","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 new adaptive channel estimator for turbo decoding in Rayleigh fading channels 一种用于瑞利衰落信道turbo译码的自适应信道估计器
The 8th International Conference on Communication Systems, 2002. ICCS 2002. Pub Date : 2002-11-25 DOI: 10.1109/ICCS.2002.1182482
Wee-Peng Ang, H. Garg
{"title":"A new adaptive channel estimator for turbo decoding in Rayleigh fading channels","authors":"Wee-Peng Ang, H. Garg","doi":"10.1109/ICCS.2002.1182482","DOIUrl":"https://doi.org/10.1109/ICCS.2002.1182482","url":null,"abstract":"A new adaptive channel estimation filter based on the variable step-size LMS algorithm is shown to perform close to the optimum Wiener filter without assuming a-priori knowledge of the channel fading rate. It is unlike other fixed characteristics filters such as the equal weight moving average and FIR filters designed using the windowing method. Under a non-stationary Rayleigh fading channel where the fading rate varies, the proposed adaptive filter is also able to track the time-varying channel, achieving better performance than the fixed characteristics filters.","PeriodicalId":401041,"journal":{"name":"The 8th International Conference on Communication Systems, 2002. ICCS 2002.","volume":"197 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131542677","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
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