Pub Date : 2005-07-11DOI: 10.1109/ICACT.2005.245826
Jong-Kil Shin, T. Yoo, M. Lee
A 10 Gb/s clock and data recovery (CDR) circuits which extract the clock signal from non-return-zero (NRZ) random data stream are very important to the 10-gigabit -per-second integrated receivers. The half-rate linear phase detector for 10-Gb/s clock and data recovery (CDR) circuit is designed to 0.18-um standard CMOS technology. This half-rate phase detector is composed of four latches and two exclusive OR (XOR) gates. The proposed circuits of phase detector provide a linear characteristic and it has a configuration of MOS current-mode logic (MCML) gates
{"title":"Design of half-rate linear phase detector using MOS current-mode logic gates for 10-Gb/s clock and data recovery circuit","authors":"Jong-Kil Shin, T. Yoo, M. Lee","doi":"10.1109/ICACT.2005.245826","DOIUrl":"https://doi.org/10.1109/ICACT.2005.245826","url":null,"abstract":"A 10 Gb/s clock and data recovery (CDR) circuits which extract the clock signal from non-return-zero (NRZ) random data stream are very important to the 10-gigabit -per-second integrated receivers. The half-rate linear phase detector for 10-Gb/s clock and data recovery (CDR) circuit is designed to 0.18-um standard CMOS technology. This half-rate phase detector is composed of four latches and two exclusive OR (XOR) gates. The proposed circuits of phase detector provide a linear characteristic and it has a configuration of MOS current-mode logic (MCML) gates","PeriodicalId":293442,"journal":{"name":"The 7th International Conference on Advanced Communication Technology, 2005, ICACT 2005.","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123438856","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 : 2005-07-11DOI: 10.1109/ICACT.2005.245884
Hyun Wook, Miyoung Huh, Shin-Gak Kang
In this paper, we suggest the architecture of presence agent server system that manages presence information. The server collects presence information and distributes them to the subscriber who wants to receive presence status. When collecting and distributing the presence information, the server uses SIP protocol as main signaling protocol
{"title":"Design of presence agent server for SIP-based presence services","authors":"Hyun Wook, Miyoung Huh, Shin-Gak Kang","doi":"10.1109/ICACT.2005.245884","DOIUrl":"https://doi.org/10.1109/ICACT.2005.245884","url":null,"abstract":"In this paper, we suggest the architecture of presence agent server system that manages presence information. The server collects presence information and distributes them to the subscriber who wants to receive presence status. When collecting and distributing the presence information, the server uses SIP protocol as main signaling protocol","PeriodicalId":293442,"journal":{"name":"The 7th International Conference on Advanced Communication Technology, 2005, ICACT 2005.","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123534294","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 : 2005-07-11DOI: 10.1109/ICACT.2005.246186
Lan Quan, Kyung-Geun Lee, T. Pinkston
In order to make the unstructured P2P Freenet appropriate for integrated wired and wireless network environments, we propose two kinds of Freenet caching schemes, WDC (Wireless Dependent Caching) and HNS (Half Node Storing), and evaluate their performance through simulation. The performance of WDC is similar to the original Freenet, however it can save bandwidth of the wireless link significantly by replicating files only at wired nodes. With the HNS scheme, although it utilizes more bandwidth than WDC, nodes keep half of the files of the original Freenet, and both the number of hops for success and failure rate decrease. Therefore, the WDC scheme is appropriate for extremely limited wireless link or low proportion of wireless node environments while the HNS scheme can provide a smaller number of hops to success and higher success rate than the original Freenet
{"title":"Peer-to-peer caching schemes for integrated wired and wireless network environments","authors":"Lan Quan, Kyung-Geun Lee, T. Pinkston","doi":"10.1109/ICACT.2005.246186","DOIUrl":"https://doi.org/10.1109/ICACT.2005.246186","url":null,"abstract":"In order to make the unstructured P2P Freenet appropriate for integrated wired and wireless network environments, we propose two kinds of Freenet caching schemes, WDC (Wireless Dependent Caching) and HNS (Half Node Storing), and evaluate their performance through simulation. The performance of WDC is similar to the original Freenet, however it can save bandwidth of the wireless link significantly by replicating files only at wired nodes. With the HNS scheme, although it utilizes more bandwidth than WDC, nodes keep half of the files of the original Freenet, and both the number of hops for success and failure rate decrease. Therefore, the WDC scheme is appropriate for extremely limited wireless link or low proportion of wireless node environments while the HNS scheme can provide a smaller number of hops to success and higher success rate than the original Freenet","PeriodicalId":293442,"journal":{"name":"The 7th International Conference on Advanced Communication Technology, 2005, ICACT 2005.","volume":"154 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116884303","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 : 2005-07-11DOI: 10.1109/ICACT.2005.245953
Chachanang Chiu, Ying-Kai Lee, Yung-Mu Chen, T. Chung, Fong-Ching Yuan
The modern military weapons are getting much more complicated today. It is necessary to develop an information system that can automatically detects weapon devices problems and alarms before problems occur. Intelligent maintenance system (IMS) is a monitoring system and provides users with important values of remote detected devices. Those values are analyzed by data automatic learning mechanism to find out-patterns between values and the device status before the device fails. The pattern can inform maintenance personnel immediately via network after confirming alarms to enhance devices reliability. To achieve this goal, however, the key point is relied on the effective planning of data acquisition sampling and transmission. Due to the traditional algorithm's failure in determining both the discarding strategy and network bandwidth allocation within the system, this research proposes two methods to improve the known difficulty, one is the optimization of data transmission network bandwidth allocation, and the other is the optimization of the server queue discarding strategy. The methods used in this research can reduce the system development costs and enhance the overall efficiency.
{"title":"The modeling of data acquisition sampling and transmission planning for intelligent maintenance system","authors":"Chachanang Chiu, Ying-Kai Lee, Yung-Mu Chen, T. Chung, Fong-Ching Yuan","doi":"10.1109/ICACT.2005.245953","DOIUrl":"https://doi.org/10.1109/ICACT.2005.245953","url":null,"abstract":"The modern military weapons are getting much more complicated today. It is necessary to develop an information system that can automatically detects weapon devices problems and alarms before problems occur. Intelligent maintenance system (IMS) is a monitoring system and provides users with important values of remote detected devices. Those values are analyzed by data automatic learning mechanism to find out-patterns between values and the device status before the device fails. The pattern can inform maintenance personnel immediately via network after confirming alarms to enhance devices reliability. To achieve this goal, however, the key point is relied on the effective planning of data acquisition sampling and transmission. Due to the traditional algorithm's failure in determining both the discarding strategy and network bandwidth allocation within the system, this research proposes two methods to improve the known difficulty, one is the optimization of data transmission network bandwidth allocation, and the other is the optimization of the server queue discarding strategy. The methods used in this research can reduce the system development costs and enhance the overall efficiency.","PeriodicalId":293442,"journal":{"name":"The 7th International Conference on Advanced Communication Technology, 2005, ICACT 2005.","volume":"1220 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116906447","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 : 2005-07-11DOI: 10.1109/ICACT.2005.245831
R. Alihemmati, M. Kalantari
In this paper, a comparative investigation on various channel estimation and equalization algorithms for OFDM based high rate wireless MAN networks is presented and analyzed in terms of mean-square error (MSE), bit-error rate (BER) and computational complexity. We consider some of the proposed algorithms regarding channel estimation and equalization for typical OFDM systems in the literature, and then conclude an efficient and suitable scheme with some complexity reduction suggestions, in implementing a practical MMDS application of the IEEE 802.16a standard WMAN networks based on the OFDM technique. The system performance under various configurations of the proposed physical layer based on the standard specifications especially for different coding & modulation combinations (PHY modes) as well as uncoded case, be evaluated
{"title":"On channel estimation and equalization in OFDM based broadband fixed wireless MAN networks","authors":"R. Alihemmati, M. Kalantari","doi":"10.1109/ICACT.2005.245831","DOIUrl":"https://doi.org/10.1109/ICACT.2005.245831","url":null,"abstract":"In this paper, a comparative investigation on various channel estimation and equalization algorithms for OFDM based high rate wireless MAN networks is presented and analyzed in terms of mean-square error (MSE), bit-error rate (BER) and computational complexity. We consider some of the proposed algorithms regarding channel estimation and equalization for typical OFDM systems in the literature, and then conclude an efficient and suitable scheme with some complexity reduction suggestions, in implementing a practical MMDS application of the IEEE 802.16a standard WMAN networks based on the OFDM technique. The system performance under various configurations of the proposed physical layer based on the standard specifications especially for different coding & modulation combinations (PHY modes) as well as uncoded case, be evaluated","PeriodicalId":293442,"journal":{"name":"The 7th International Conference on Advanced Communication Technology, 2005, ICACT 2005.","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125807186","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 : 2005-07-11DOI: 10.1109/ICACT.2005.246152
Yoo-Hwa Kang, Jong-Hyup Lee
Multiprotocol label switching (MPLS) is a method of switching IP packets through a network by applying simple labels to packets. It provides the privacy and quality of service (QoS) advantages of connection-oriented services. Other benefits of MPLS include traffic engineering capabilities needed for the efficient use of network resources. Traffic engineering shifts the traffic load from overutilized portions of the network to underutilized portions, according to traffic destination, traffic type, traffic load, time of day, and so on. As the MPLS IP VPN market grows, QoS offerings is required to provide VPN groups premium services as well as to differentiate in existing VPN groups. Faced with this challenge, MPLS IP VPNs need to offer both best effort and premium services that ensure traffic engineered path label switched path (LSP) for satisfy a variety of QoS requirements. In this paper, we focus on the issues related to QoS provision for MPLS IP VPN services. We propose the workflow of MPLS IP VPN application to provide best effort and premium services. We discuss the design to arrive at the architecture of the MPLS IP VPN module to support best effort and premium services. This can provide way how to realize MPLS IP VPN services in a router on the analysis of requirement. In conjunction with MPLS, the implementation of MPLS IP VPNs provides label distribution to setup traffic engineered LSP on a PE router
MPLS (Multiprotocol label switching)是一种在网络中对IP报文进行简单标签交换的方法。它提供了面向连接的服务的隐私和服务质量(QoS)优势。MPLS的其他好处包括有效利用网络资源所需的流量工程功能。流量工程根据流量目的地、流量类型、流量负载、一天中的时间等因素，将流量负载从网络中过度利用的部分转移到未充分利用的部分。随着MPLS IP VPN市场的增长，需要QoS产品为VPN组提供优质服务，并在现有VPN组中进行区分。面对这一挑战，MPLS IP vpn需要提供最优服务和优质服务，以确保流量工程路径标签交换路径(LSP)满足各种QoS需求。本文主要研究了MPLS IP VPN业务QoS提供的相关问题。我们提出了MPLS IP VPN应用的工作流程，以提供最佳的努力和优质的服务。我们讨论了MPLS IP VPN模块的架构设计，以支持最佳努力和优质服务。通过对需求的分析，为在路由器上实现MPLS IP VPN业务提供了思路。MPLS IP vpn的实现与MPLS相结合，提供标签分发，在PE路由器上建立流量工程LSP
{"title":"The implementation of the premium services for MPLS IP VPNs","authors":"Yoo-Hwa Kang, Jong-Hyup Lee","doi":"10.1109/ICACT.2005.246152","DOIUrl":"https://doi.org/10.1109/ICACT.2005.246152","url":null,"abstract":"Multiprotocol label switching (MPLS) is a method of switching IP packets through a network by applying simple labels to packets. It provides the privacy and quality of service (QoS) advantages of connection-oriented services. Other benefits of MPLS include traffic engineering capabilities needed for the efficient use of network resources. Traffic engineering shifts the traffic load from overutilized portions of the network to underutilized portions, according to traffic destination, traffic type, traffic load, time of day, and so on. As the MPLS IP VPN market grows, QoS offerings is required to provide VPN groups premium services as well as to differentiate in existing VPN groups. Faced with this challenge, MPLS IP VPNs need to offer both best effort and premium services that ensure traffic engineered path label switched path (LSP) for satisfy a variety of QoS requirements. In this paper, we focus on the issues related to QoS provision for MPLS IP VPN services. We propose the workflow of MPLS IP VPN application to provide best effort and premium services. We discuss the design to arrive at the architecture of the MPLS IP VPN module to support best effort and premium services. This can provide way how to realize MPLS IP VPN services in a router on the analysis of requirement. In conjunction with MPLS, the implementation of MPLS IP VPNs provides label distribution to setup traffic engineered LSP on a PE router","PeriodicalId":293442,"journal":{"name":"The 7th International Conference on Advanced Communication Technology, 2005, ICACT 2005.","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128504467","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 : 2005-07-11DOI: 10.1109/ICACT.2005.245847
Juyoung Park, E. Kwon, O. Jung, S. Kang
IP multicast shows a very strong advantage in the group communication services. To deploy IP multicast in the current Internet, every IP router must be changed into multicast enabled ones and several deployment issues should be solved. These problems prevent IP multicast mechanism from being deployed in the IP world. These problems gives a good reason why today's group communication uses replicated IP unicast mechanism instead of IP multicast. Recently an overlay multicast is proposed as an alternative method of IP multicast. We propose a RMCP (relayed multicast protocol) as an application-layer protocol for providing end-to-end multicast services over IP-network environment. We also push RMCP into ITU-T and ISO standardization activity. In this paper we define the basic concepts of relayed multicast scheme, data delivery models, service scenarios and standardization activities on RMCP
{"title":"A framework for internet group communications services","authors":"Juyoung Park, E. Kwon, O. Jung, S. Kang","doi":"10.1109/ICACT.2005.245847","DOIUrl":"https://doi.org/10.1109/ICACT.2005.245847","url":null,"abstract":"IP multicast shows a very strong advantage in the group communication services. To deploy IP multicast in the current Internet, every IP router must be changed into multicast enabled ones and several deployment issues should be solved. These problems prevent IP multicast mechanism from being deployed in the IP world. These problems gives a good reason why today's group communication uses replicated IP unicast mechanism instead of IP multicast. Recently an overlay multicast is proposed as an alternative method of IP multicast. We propose a RMCP (relayed multicast protocol) as an application-layer protocol for providing end-to-end multicast services over IP-network environment. We also push RMCP into ITU-T and ISO standardization activity. In this paper we define the basic concepts of relayed multicast scheme, data delivery models, service scenarios and standardization activities on RMCP","PeriodicalId":293442,"journal":{"name":"The 7th International Conference on Advanced Communication Technology, 2005, ICACT 2005.","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127493076","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 : 2005-07-11DOI: 10.1109/ICACT.2005.246027
P. Pavarangkoon, N. Maneerat, R. Varakulsiripunth
This paper studies routing and wavelength assignment in wavelength-routed (WR) optical WDM networks which are circuit-switched in nature. When a session request is given, the hard task of routing and wavelength assignment (RWA) is to calculate the satisfiable path between two nodes, and also to assign an available set of wavelengths along this path. Therefore, we have proposed a new routing and wavelength assignment algorithm, called total wavelengths and expected available wavelengths (TEW) algorithm in order to achieve the effective routing and wavelength assignment that can guarantee the service for user's requirement. The link weight function is considered as the main factor for route selection in TEW algorithm. This function is calculated by using a determination factor of the number of wavelengths that are being used currently and are supposed to be available after a certain time. The session requests from users are routed on the links that has the least number of link weights by using Dijkstra's shortest path algorithm. This means that the selected lightpath have the minimum utilization and maximum expected available wavelengths. The impact of proposed link weight computing function on the blocking probability is investigated by means of computer simulation and comparing with the traditional mechanism. The results show that the proposed TEW algorithm can achieve better performance in terms of the blocking probability
{"title":"Routing algorithms with adaptive weight function based on total wavelengths and expected available wavelengths in optical WDM networks","authors":"P. Pavarangkoon, N. Maneerat, R. Varakulsiripunth","doi":"10.1109/ICACT.2005.246027","DOIUrl":"https://doi.org/10.1109/ICACT.2005.246027","url":null,"abstract":"This paper studies routing and wavelength assignment in wavelength-routed (WR) optical WDM networks which are circuit-switched in nature. When a session request is given, the hard task of routing and wavelength assignment (RWA) is to calculate the satisfiable path between two nodes, and also to assign an available set of wavelengths along this path. Therefore, we have proposed a new routing and wavelength assignment algorithm, called total wavelengths and expected available wavelengths (TEW) algorithm in order to achieve the effective routing and wavelength assignment that can guarantee the service for user's requirement. The link weight function is considered as the main factor for route selection in TEW algorithm. This function is calculated by using a determination factor of the number of wavelengths that are being used currently and are supposed to be available after a certain time. The session requests from users are routed on the links that has the least number of link weights by using Dijkstra's shortest path algorithm. This means that the selected lightpath have the minimum utilization and maximum expected available wavelengths. The impact of proposed link weight computing function on the blocking probability is investigated by means of computer simulation and comparing with the traditional mechanism. The results show that the proposed TEW algorithm can achieve better performance in terms of the blocking probability","PeriodicalId":293442,"journal":{"name":"The 7th International Conference on Advanced Communication Technology, 2005, ICACT 2005.","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129096343","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 : 2005-07-11DOI: 10.1109/ICACT.2005.246215
Yung-Mu Chen, T. Chung, Jie Yang, Pei Chen
In this investigation, we propose a new multicast protocol, QoS multicasting routing protocol on N-hop dominating flooding (QMNF), based on a layered routing architecture of active network approach. In this architecture, QMNF invites the N-hop flooding component and the shortest path routing table from OSPF by open signaling interfaces, floods the path-finding messages in capsules and employs two-pass resource reservation scheme to avoid unnecessary resource reservation. In our simulation, we compare the performance of QMNF with a traditional flooding algorithm, an optimal flooding algorithm, PIM and QMBF. The simulation results confirm that QMNF has the high success rate, the better resource utilization and the traffic can be distributed evenly in a network
{"title":"QMNF: QoS-aware multicasting routing protocol using N-hop dominating flooding approach on active network","authors":"Yung-Mu Chen, T. Chung, Jie Yang, Pei Chen","doi":"10.1109/ICACT.2005.246215","DOIUrl":"https://doi.org/10.1109/ICACT.2005.246215","url":null,"abstract":"In this investigation, we propose a new multicast protocol, QoS multicasting routing protocol on N-hop dominating flooding (QMNF), based on a layered routing architecture of active network approach. In this architecture, QMNF invites the N-hop flooding component and the shortest path routing table from OSPF by open signaling interfaces, floods the path-finding messages in capsules and employs two-pass resource reservation scheme to avoid unnecessary resource reservation. In our simulation, we compare the performance of QMNF with a traditional flooding algorithm, an optimal flooding algorithm, PIM and QMBF. The simulation results confirm that QMNF has the high success rate, the better resource utilization and the traffic can be distributed evenly in a network","PeriodicalId":293442,"journal":{"name":"The 7th International Conference on Advanced Communication Technology, 2005, ICACT 2005.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130809503","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 : 2005-07-11DOI: 10.1109/ICACT.2005.245908
H. Lau
This paper studies the effectiveness of incorporating an N-branch postdetection selection combining diversity reception technique in a pilot-symbol-aided (PSA) 16QAM system over frequency non-selective and frequency-selective Rician-fading channels. Simulation results have shown that the diversity improvement is more significant for higher signal-to-noise ratio (SNR), higher signal-to-interference ratio (SIR), smaller power ratio of direct-path signal to multipath signal (CMR), lower bit-error-rate (BER), shorter normalized delay, and higher power ratio of the main Rayleigh-faded signal to the delayed Rayleigh-faded signal (CDR). The diversity improvement is also found to be more sensitive to CDR, rather than CMR
{"title":"Pilot-symbol-aided 16QAM with selection diversity over Rician-fading channels","authors":"H. Lau","doi":"10.1109/ICACT.2005.245908","DOIUrl":"https://doi.org/10.1109/ICACT.2005.245908","url":null,"abstract":"This paper studies the effectiveness of incorporating an N-branch postdetection selection combining diversity reception technique in a pilot-symbol-aided (PSA) 16QAM system over frequency non-selective and frequency-selective Rician-fading channels. Simulation results have shown that the diversity improvement is more significant for higher signal-to-noise ratio (SNR), higher signal-to-interference ratio (SIR), smaller power ratio of direct-path signal to multipath signal (CMR), lower bit-error-rate (BER), shorter normalized delay, and higher power ratio of the main Rayleigh-faded signal to the delayed Rayleigh-faded signal (CDR). The diversity improvement is also found to be more sensitive to CDR, rather than CMR","PeriodicalId":293442,"journal":{"name":"The 7th International Conference on Advanced Communication Technology, 2005, ICACT 2005.","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128825835","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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