Pub Date : 2003-04-09DOI: 10.1109/ICCT.2003.1209709
Yongzhong Zou, Jiangbo Dong, Daoben Li
In this paper, a novel combination scheme of hybrid ARQ and adaptive modulation and coding (AMC) with space-time block coding (STBC) and turbo codes for wireless packet data transmission is proposed. Performance of the proposed HARQ/AMC system is investigated and compared in terms of frame error rate (FER) and throughput.
{"title":"A novel HARQ and AMC scheme using space-time block coding and turbo codes for wireless packet data transmission","authors":"Yongzhong Zou, Jiangbo Dong, Daoben Li","doi":"10.1109/ICCT.2003.1209709","DOIUrl":"https://doi.org/10.1109/ICCT.2003.1209709","url":null,"abstract":"In this paper, a novel combination scheme of hybrid ARQ and adaptive modulation and coding (AMC) with space-time block coding (STBC) and turbo codes for wireless packet data transmission is proposed. Performance of the proposed HARQ/AMC system is investigated and compared in terms of frame error rate (FER) and throughput.","PeriodicalId":237858,"journal":{"name":"International Conference on Communication Technology Proceedings, 2003. ICCT 2003.","volume":"26 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":"132677965","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.2003.1209648
H. Nie, P. Mathiopoulos
In this paper, a path-loss-based successive interference cancellation (SIC), which successively decodes mobile users assigned to the same cell from the one with minimum path loss to the one with the maximum path loss and removes their contribution from the received signals in the same sequence, is proposed to reduce both the outage probability and the inter-cell interference of cellular CDMA systems. Without excluding the effects of lognormal shadowing fading and for an arbitrary cluster of homogenous hexagonal cells, we have theoretically analyzed the reverse link capacity improvement brought by the path-loss-based SIC over a conventional matched filter. Furthermore, by taking a pedestrian application in cdma2000 as an example, computer simulations are performed, and the obtained simulation results have perfectly confirmed our theoretical analysis.
{"title":"Reverse link capacity analysis for cellular CDMA systems employing successive interference cancellation","authors":"H. Nie, P. Mathiopoulos","doi":"10.1109/ICCT.2003.1209648","DOIUrl":"https://doi.org/10.1109/ICCT.2003.1209648","url":null,"abstract":"In this paper, a path-loss-based successive interference cancellation (SIC), which successively decodes mobile users assigned to the same cell from the one with minimum path loss to the one with the maximum path loss and removes their contribution from the received signals in the same sequence, is proposed to reduce both the outage probability and the inter-cell interference of cellular CDMA systems. Without excluding the effects of lognormal shadowing fading and for an arbitrary cluster of homogenous hexagonal cells, we have theoretically analyzed the reverse link capacity improvement brought by the path-loss-based SIC over a conventional matched filter. Furthermore, by taking a pedestrian application in cdma2000 as an example, computer simulations are performed, and the obtained simulation results have perfectly confirmed our theoretical analysis.","PeriodicalId":237858,"journal":{"name":"International Conference on Communication Technology Proceedings, 2003. ICCT 2003.","volume":"36 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":"133241271","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.2003.1209809
Gexiang Zhang, Wei-dong Jin, F. Jin
This paper proposes a novel method called multi-criterion satisfactory optimization method (MCSOM) to design infinite impulse response (IIR) filters. The core of the method is that multiple criteria can be adjusted conveniently, according to different requirements of different designers for performances of pass bands, stop bands and transition bands of IIR digital filters. The method can be employed directly in frequency domain. By designing performance specification satisfaction rate functions and synthesis satisfactory rate function of IIR digital filters, satisfactory optimization model is constructed. The model is characterized by considering satisfactory design of performance specifications and optimization of parameters of IIR digital filters, simultaneously. Furthermore, a new quantum genetic algorithm (NQGA) is also proposed to search automatically satisfactory solution in IIR digital filter design in this paper. Rapid convergence and good global search capability characterized the performance of NQGA. The effectiveness, applicability and flexibility of MCSOM based on NQGA are demonstrated by experimental results on the lowpass and bandpass IIR digital filters design. The results show that the introduced method is superior to Yule-Walker method and the method in Li Jianhua and Yin Fuliang (1996).
{"title":"Multi-criterion satisfactory optimization method for designing IIR digital filters","authors":"Gexiang Zhang, Wei-dong Jin, F. Jin","doi":"10.1109/ICCT.2003.1209809","DOIUrl":"https://doi.org/10.1109/ICCT.2003.1209809","url":null,"abstract":"This paper proposes a novel method called multi-criterion satisfactory optimization method (MCSOM) to design infinite impulse response (IIR) filters. The core of the method is that multiple criteria can be adjusted conveniently, according to different requirements of different designers for performances of pass bands, stop bands and transition bands of IIR digital filters. The method can be employed directly in frequency domain. By designing performance specification satisfaction rate functions and synthesis satisfactory rate function of IIR digital filters, satisfactory optimization model is constructed. The model is characterized by considering satisfactory design of performance specifications and optimization of parameters of IIR digital filters, simultaneously. Furthermore, a new quantum genetic algorithm (NQGA) is also proposed to search automatically satisfactory solution in IIR digital filter design in this paper. Rapid convergence and good global search capability characterized the performance of NQGA. The effectiveness, applicability and flexibility of MCSOM based on NQGA are demonstrated by experimental results on the lowpass and bandpass IIR digital filters design. The results show that the introduced method is superior to Yule-Walker method and the method in Li Jianhua and Yin Fuliang (1996).","PeriodicalId":237858,"journal":{"name":"International Conference on Communication Technology Proceedings, 2003. ICCT 2003.","volume":"117 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":"131411180","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.2003.1209874
Sungyean Cho, Myong-Soon Park
We propose fast join mechanism to search potential parents for new members in end host multicast. An existing method searches EM-tree one step at a time to find a potential parent. The existing search method causes long join latency. To search quickly, we search EM-tree two steps at a time. In other words, we search children and grandchildren at the same time. We look at the performance of fast join mechanism using the following metrics: cost and search time by the number of group members and degree limit. Simulation results show that our mechanism searches potential faster than the existing method.
{"title":"FJM: fast join mechanism for end host multicast","authors":"Sungyean Cho, Myong-Soon Park","doi":"10.1109/ICCT.2003.1209874","DOIUrl":"https://doi.org/10.1109/ICCT.2003.1209874","url":null,"abstract":"We propose fast join mechanism to search potential parents for new members in end host multicast. An existing method searches EM-tree one step at a time to find a potential parent. The existing search method causes long join latency. To search quickly, we search EM-tree two steps at a time. In other words, we search children and grandchildren at the same time. We look at the performance of fast join mechanism using the following metrics: cost and search time by the number of group members and degree limit. Simulation results show that our mechanism searches potential faster than the existing method.","PeriodicalId":237858,"journal":{"name":"International Conference on Communication Technology Proceedings, 2003. ICCT 2003.","volume":"209 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":"133827455","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.2003.1209807
Jiangbo Dong, Yongzhong Zou, Daoben Li
In this paper, the novel combination scheme for adaptive modulation and coding (AMC) and space-time block code (STBC) in which turbo code is used, namely AMC (turbo)/STBC, is proposed for the high data rate transmission. Considering the soft input to the iterative turbo decoder, two soft decision methods to get the bit soft information under maximum likelihood (ML) criteria have been studied. Simulation results prove the novelty of the proposed scheme. And both of two methods have better transmission reliability and larger system throughput than the conventional AMC system and the "method 2" which combines the STBC decoder and the signal demodulation together gets the best frame error rate performance.
{"title":"Combined adaptive modulation and coding with space-time block code for high data rate transmission","authors":"Jiangbo Dong, Yongzhong Zou, Daoben Li","doi":"10.1109/ICCT.2003.1209807","DOIUrl":"https://doi.org/10.1109/ICCT.2003.1209807","url":null,"abstract":"In this paper, the novel combination scheme for adaptive modulation and coding (AMC) and space-time block code (STBC) in which turbo code is used, namely AMC (turbo)/STBC, is proposed for the high data rate transmission. Considering the soft input to the iterative turbo decoder, two soft decision methods to get the bit soft information under maximum likelihood (ML) criteria have been studied. Simulation results prove the novelty of the proposed scheme. And both of two methods have better transmission reliability and larger system throughput than the conventional AMC system and the \"method 2\" which combines the STBC decoder and the signal demodulation together gets the best frame error rate performance.","PeriodicalId":237858,"journal":{"name":"International Conference on Communication Technology Proceedings, 2003. ICCT 2003.","volume":"125 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":"115640811","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.2003.1209741
Yang Cao, Yong Ren, X. Shan
In this paper we analyze the performance of a PCC-OFDM system under the environment of frequency offset. And a method using shift auto-correlation to correct the frequency offset is presented. Because of the small out-of-band power of PCC-OFDM, only four or six super subcarriers (SSC) are used for transmit synchronous information. The essential ideal of this method is based on the independence of the symbol being transmitted. But when frequency offset exist the demodulated symbol is correlated with each other. And the correlation degree depends on the relative frequency offset. Simulation results show that it is an effective way to estimate frequency offset.
{"title":"Frequency offset correction for PCC-OFDM with overlapping symbol periods","authors":"Yang Cao, Yong Ren, X. Shan","doi":"10.1109/ICCT.2003.1209741","DOIUrl":"https://doi.org/10.1109/ICCT.2003.1209741","url":null,"abstract":"In this paper we analyze the performance of a PCC-OFDM system under the environment of frequency offset. And a method using shift auto-correlation to correct the frequency offset is presented. Because of the small out-of-band power of PCC-OFDM, only four or six super subcarriers (SSC) are used for transmit synchronous information. The essential ideal of this method is based on the independence of the symbol being transmitted. But when frequency offset exist the demodulated symbol is correlated with each other. And the correlation degree depends on the relative frequency offset. Simulation results show that it is an effective way to estimate frequency offset.","PeriodicalId":237858,"journal":{"name":"International Conference on Communication Technology Proceedings, 2003. ICCT 2003.","volume":"36 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":"123908484","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.2003.1209660
Yanbo Cao, Bin Zhou, Chengshu Li
CDMA/TDD has the flexibility on the resources allocation. Most of CDMA/TDD system adopts same time slot allocation strategy for avoiding unexpected interference. However, the level of traffic asymmetry may be different from cell to cell. If these differences are great and cells are fully loaded, CDMA/TDD system adopting same time slot allocation strategy loses the system capacity. A novel cross time slot strategy based on smart antenna is presented to overcome this problem. The simulation results show that if the levels of the traffic asymmetry between neighboring cells are great and fully loaded, the system adopting cross time slot allocation can improve resource utilization.
{"title":"A novel channel allocation scheme to enhance resource utilization in CDMA/TDD","authors":"Yanbo Cao, Bin Zhou, Chengshu Li","doi":"10.1109/ICCT.2003.1209660","DOIUrl":"https://doi.org/10.1109/ICCT.2003.1209660","url":null,"abstract":"CDMA/TDD has the flexibility on the resources allocation. Most of CDMA/TDD system adopts same time slot allocation strategy for avoiding unexpected interference. However, the level of traffic asymmetry may be different from cell to cell. If these differences are great and cells are fully loaded, CDMA/TDD system adopting same time slot allocation strategy loses the system capacity. A novel cross time slot strategy based on smart antenna is presented to overcome this problem. The simulation results show that if the levels of the traffic asymmetry between neighboring cells are great and fully loaded, the system adopting cross time slot allocation can improve resource utilization.","PeriodicalId":237858,"journal":{"name":"International Conference on Communication Technology Proceedings, 2003. ICCT 2003.","volume":"49 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":"114712667","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.2003.1209029
Ping Zhang, Lihua Li
The developing tendency of mobile communications beyond 3G is analyzed to pave the way for the future. Some key issues related to beyond 3G mobile communications are described from technical perspective and system architecture concept. Some research achievements regarding TD-MC-CDMA demonstration system are mentioned in WTI (Wireless Technology Innovation) labs. Discussions for the prediction of next generation mobile communication systems are given.
{"title":"Research on beyond 3G mobile communications","authors":"Ping Zhang, Lihua Li","doi":"10.1109/ICCT.2003.1209029","DOIUrl":"https://doi.org/10.1109/ICCT.2003.1209029","url":null,"abstract":"The developing tendency of mobile communications beyond 3G is analyzed to pave the way for the future. Some key issues related to beyond 3G mobile communications are described from technical perspective and system architecture concept. Some research achievements regarding TD-MC-CDMA demonstration system are mentioned in WTI (Wireless Technology Innovation) labs. Discussions for the prediction of next generation mobile communication systems are given.","PeriodicalId":237858,"journal":{"name":"International Conference on Communication Technology Proceedings, 2003. ICCT 2003.","volume":"171 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":"122155879","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.2003.1209823
Chunfeng Wang, Xiuzhong Chen, Ru Li, Xiaolu Huang, Zhongcheng Li
In this paper, we propose an effective resource provision technique, which can provide absolute delay guaranteed services for real-time application. Based on other work on connection- population-insensitive delay computing and worst-case delay analysis, we develop methods which consider the run time network workload uneven distribution factors to configure resources provided to real-time applications. With these new methods, utilization based admission control can also be used to provide scalable and efficient admission control. We assume the underlying network to use static scheduling. We concentrate on the simplest case that only one class of real-time application is services. We compare the results of our adaptive strategy with those of the uniform UBAC method and demonstrate the improvement in effective utilization of system resources.
{"title":"Effective resource provision for real-time applications in static-priority scheduling networks","authors":"Chunfeng Wang, Xiuzhong Chen, Ru Li, Xiaolu Huang, Zhongcheng Li","doi":"10.1109/ICCT.2003.1209823","DOIUrl":"https://doi.org/10.1109/ICCT.2003.1209823","url":null,"abstract":"In this paper, we propose an effective resource provision technique, which can provide absolute delay guaranteed services for real-time application. Based on other work on connection- population-insensitive delay computing and worst-case delay analysis, we develop methods which consider the run time network workload uneven distribution factors to configure resources provided to real-time applications. With these new methods, utilization based admission control can also be used to provide scalable and efficient admission control. We assume the underlying network to use static scheduling. We concentrate on the simplest case that only one class of real-time application is services. We compare the results of our adaptive strategy with those of the uniform UBAC method and demonstrate the improvement in effective utilization of system resources.","PeriodicalId":237858,"journal":{"name":"International Conference on Communication Technology Proceedings, 2003. ICCT 2003.","volume":"164 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":"116879025","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.2003.1209749
Yong Peng, Shiduan Cheng
Recent research has shown that the original DCF access mode of IEEE 802.11 has low performance in heavy traffic and multi-hop environment [Yong Peng, et al., ICII 2001] [Shugong Xu, et al., IEEE GLOBECOM, 2001]. In this paper, our research focus is placed on the improvement of 802.11 networks in multi-hop environment with heavy contention area. We implement system performance enhancement through the interaction of MAC layer and ad hoc routing mechanism. We have first introduced a MAC parameter to evaluate current wireless media contention state (i.e. load factor). In order to be adaptive to the MAC layer contention, we propose a new DCF based MAC mechanism with the name of random route discovery packet drop (R/sup 2/DPD). This new mechanism drops ad hoc routing packets in the MAC layer according to the on-line measuring of local contention state (i.e. load factor). Stations in heavy contention environment drop route discovery packets with high probability so that the congestion is relieved. Simulation results have shown that our new MAC algorithm can achieve better performance than the original DCF algorithm.
{"title":"Random route discovery packet drop using load factor of MAC layer in IEEE 802.11 ad hoc networks","authors":"Yong Peng, Shiduan Cheng","doi":"10.1109/ICCT.2003.1209749","DOIUrl":"https://doi.org/10.1109/ICCT.2003.1209749","url":null,"abstract":"Recent research has shown that the original DCF access mode of IEEE 802.11 has low performance in heavy traffic and multi-hop environment [Yong Peng, et al., ICII 2001] [Shugong Xu, et al., IEEE GLOBECOM, 2001]. In this paper, our research focus is placed on the improvement of 802.11 networks in multi-hop environment with heavy contention area. We implement system performance enhancement through the interaction of MAC layer and ad hoc routing mechanism. We have first introduced a MAC parameter to evaluate current wireless media contention state (i.e. load factor). In order to be adaptive to the MAC layer contention, we propose a new DCF based MAC mechanism with the name of random route discovery packet drop (R/sup 2/DPD). This new mechanism drops ad hoc routing packets in the MAC layer according to the on-line measuring of local contention state (i.e. load factor). Stations in heavy contention environment drop route discovery packets with high probability so that the congestion is relieved. Simulation results have shown that our new MAC algorithm can achieve better performance than the original DCF algorithm.","PeriodicalId":237858,"journal":{"name":"International Conference on Communication Technology Proceedings, 2003. ICCT 2003.","volume":"105 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":"117110436","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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