Pub Date : 1997-12-17DOI: 10.1109/ICPWC.1997.655518
N. Morinaga
The wired system represented by optical fiber communication, and the wireless system including microwave radio, satellite, mobile and indoor radio communications-both have made remarkable advances with developments in their and technology. Today, what everyone all over the world hopes is that in the new era of the 21th century, the advanced information-based society will be constructed with the powerful support of these telecommunication systems. Some concepts of the technological fusion of the optical fiber system, i.e., wired system and wireless system for achieving high speed and highly flexible multimedia transmission are presented.
{"title":"Technological fusion of optical fiber system and wireless system","authors":"N. Morinaga","doi":"10.1109/ICPWC.1997.655518","DOIUrl":"https://doi.org/10.1109/ICPWC.1997.655518","url":null,"abstract":"The wired system represented by optical fiber communication, and the wireless system including microwave radio, satellite, mobile and indoor radio communications-both have made remarkable advances with developments in their and technology. Today, what everyone all over the world hopes is that in the new era of the 21th century, the advanced information-based society will be constructed with the powerful support of these telecommunication systems. Some concepts of the technological fusion of the optical fiber system, i.e., wired system and wireless system for achieving high speed and highly flexible multimedia transmission are presented.","PeriodicalId":166667,"journal":{"name":"1997 IEEE International Conference on Personal Wireless Communications (Cat. No.97TH8338)","volume":"280 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116190441","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 : 1997-12-17DOI: 10.1109/ICPWC.1997.655511
JaeHeung Kim, I. Jeong
We consider a 2-tier DS/CDMA cellular system, and analyze the power control performance on the reverse link. It is assumed the radio channel experiences independent Rayleigh fading. The effects of the power control parameters such as the power control step size, BER of the power control bit, and the velocity of the mobile station are described. In order to improve the effect of power control, a variable step size power control scheme is required for the radio channel environment.
{"title":"The performance analysis of reverse power control for DS/CDMA system","authors":"JaeHeung Kim, I. Jeong","doi":"10.1109/ICPWC.1997.655511","DOIUrl":"https://doi.org/10.1109/ICPWC.1997.655511","url":null,"abstract":"We consider a 2-tier DS/CDMA cellular system, and analyze the power control performance on the reverse link. It is assumed the radio channel experiences independent Rayleigh fading. The effects of the power control parameters such as the power control step size, BER of the power control bit, and the velocity of the mobile station are described. In order to improve the effect of power control, a variable step size power control scheme is required for the radio channel environment.","PeriodicalId":166667,"journal":{"name":"1997 IEEE International Conference on Personal Wireless Communications (Cat. No.97TH8338)","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116198415","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 : 1997-12-17DOI: 10.1109/ICPWC.1997.655497
O. Ata
Linearisation of a radio basestation amplifier using a third order and a fifth order predistortion scheme is studied. Adaptive predistortion using a third order predistorter improved the amplifiers intermodulation distortion by between 6.5 dB and 30 dB as measured by a two-tone test. The variation in improvement is due to changes in the input power level. The improvement increases as the input power is backed off from the 1 dB compression point. A fifth order predistorter will give an IMD improvement of between 9 dB and 48 dB if properly adjusted. For a nine-tone test (with uniformly distributed random phase), a fifth order predistorter, if properly adapted will give an IMD improvement of between 8.5 dB and 40 dB from the worst IMD level, provided by the raw nonlinear amplifier.
{"title":"Predistortion as an effective technique for linearisation of basestation amplifiers in a mobile radio cellular system","authors":"O. Ata","doi":"10.1109/ICPWC.1997.655497","DOIUrl":"https://doi.org/10.1109/ICPWC.1997.655497","url":null,"abstract":"Linearisation of a radio basestation amplifier using a third order and a fifth order predistortion scheme is studied. Adaptive predistortion using a third order predistorter improved the amplifiers intermodulation distortion by between 6.5 dB and 30 dB as measured by a two-tone test. The variation in improvement is due to changes in the input power level. The improvement increases as the input power is backed off from the 1 dB compression point. A fifth order predistorter will give an IMD improvement of between 9 dB and 48 dB if properly adjusted. For a nine-tone test (with uniformly distributed random phase), a fifth order predistorter, if properly adapted will give an IMD improvement of between 8.5 dB and 40 dB from the worst IMD level, provided by the raw nonlinear amplifier.","PeriodicalId":166667,"journal":{"name":"1997 IEEE International Conference on Personal Wireless Communications (Cat. No.97TH8338)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122432435","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 : 1997-12-17DOI: 10.1109/ICPWC.1997.655488
F. Anjum, L. Tassiulas
The concept of overlapping registration and handoff areas has been shown to be very efficient in the context of a wireless ATM system. Here, we look at the problem of connection admission control for a WATM system with the overlapping areas architecture. We look at one way of providing QoS guarantees and provide an algorithm for connection admission control which is simple to implement and is completely distributed.
{"title":"On connection admission control in WATM","authors":"F. Anjum, L. Tassiulas","doi":"10.1109/ICPWC.1997.655488","DOIUrl":"https://doi.org/10.1109/ICPWC.1997.655488","url":null,"abstract":"The concept of overlapping registration and handoff areas has been shown to be very efficient in the context of a wireless ATM system. Here, we look at the problem of connection admission control for a WATM system with the overlapping areas architecture. We look at one way of providing QoS guarantees and provide an algorithm for connection admission control which is simple to implement and is completely distributed.","PeriodicalId":166667,"journal":{"name":"1997 IEEE International Conference on Personal Wireless Communications (Cat. No.97TH8338)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126846044","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 : 1997-12-17DOI: 10.1109/ICPWC.1997.655503
A. Rudrapatna, D. Agrawal, P. Agrawal, C. Giardina
This paper describes a simple method for enhancing the quality of service (QoS) accorded to customers of cellular networks. User mobility profiles of customers are created and maintained based on prior use at the mobile switching centers (MSC). Network resources like cellular channels and bandwidth are preferentially allocated to priority customers. At the same time, regular users of the network are treated fairly. A profile based resource allocation algorithm is described. Simulation results demonstrate the resulting improved QoS like reduced handoff failures to priority users while ensuring good QoS to other customers.
{"title":"User profile-driven resource allocation for cellular networks","authors":"A. Rudrapatna, D. Agrawal, P. Agrawal, C. Giardina","doi":"10.1109/ICPWC.1997.655503","DOIUrl":"https://doi.org/10.1109/ICPWC.1997.655503","url":null,"abstract":"This paper describes a simple method for enhancing the quality of service (QoS) accorded to customers of cellular networks. User mobility profiles of customers are created and maintained based on prior use at the mobile switching centers (MSC). Network resources like cellular channels and bandwidth are preferentially allocated to priority customers. At the same time, regular users of the network are treated fairly. A profile based resource allocation algorithm is described. Simulation results demonstrate the resulting improved QoS like reduced handoff failures to priority users while ensuring good QoS to other customers.","PeriodicalId":166667,"journal":{"name":"1997 IEEE International Conference on Personal Wireless Communications (Cat. No.97TH8338)","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117272672","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 : 1997-12-17DOI: 10.1109/ICPWC.1997.655527
T. Satoh, E. Rashid, K. Hamada, M. Fukase, T. Nakamura
The wireless hypermedia system (WHS) is introduced and analyzed. The system is used to broadcast multimedia information such as news, weather information or advertising and commercial information. The role of the transmitter is to broadcast compressed data which includes text, graphic and image information encoded in the hypertext markup language (HTML) format used on the World Wide Web. The performance of the WHS at a transmitter and a receiver has been studied for various compression techniques. A suitable packet length of the transmitted data has been chosen to provide a gain in the transmission efficiency.
{"title":"Performance analysis of the wireless hypermedia system","authors":"T. Satoh, E. Rashid, K. Hamada, M. Fukase, T. Nakamura","doi":"10.1109/ICPWC.1997.655527","DOIUrl":"https://doi.org/10.1109/ICPWC.1997.655527","url":null,"abstract":"The wireless hypermedia system (WHS) is introduced and analyzed. The system is used to broadcast multimedia information such as news, weather information or advertising and commercial information. The role of the transmitter is to broadcast compressed data which includes text, graphic and image information encoded in the hypertext markup language (HTML) format used on the World Wide Web. The performance of the WHS at a transmitter and a receiver has been studied for various compression techniques. A suitable packet length of the transmitted data has been chosen to provide a gain in the transmission efficiency.","PeriodicalId":166667,"journal":{"name":"1997 IEEE International Conference on Personal Wireless Communications (Cat. No.97TH8338)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127858137","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 : 1997-12-17DOI: 10.1109/ICPWC.1997.655486
F. Piolini, A. Rolando
The introduction of space division multiple access (SDMA) in mobile cellular systems has some impact on radio control functions, especially on call set-up and handover algorithms. The basic requirements for supporting SDMA are analysed and some channel assignment algorithms are compared.
{"title":"Channel assignment algorithms for SDMA systems","authors":"F. Piolini, A. Rolando","doi":"10.1109/ICPWC.1997.655486","DOIUrl":"https://doi.org/10.1109/ICPWC.1997.655486","url":null,"abstract":"The introduction of space division multiple access (SDMA) in mobile cellular systems has some impact on radio control functions, especially on call set-up and handover algorithms. The basic requirements for supporting SDMA are analysed and some channel assignment algorithms are compared.","PeriodicalId":166667,"journal":{"name":"1997 IEEE International Conference on Personal Wireless Communications (Cat. No.97TH8338)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133562940","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 : 1997-12-17DOI: 10.1109/ICPWC.1997.655514
R. Kohno
An adaptive array antenna or a smart antenna is named a software antenna because it can be programmable to form a desired beam pattern if an appropriate set of antenna weights is provided in software. It can be a typical tool for realizing a software radio. An adaptive array can be considered as an adaptive filter in the space and time domains for radio communications, so that the communication theory can be generalized from a conventional time domain into both the space and time domains. This paper introduces a spatial and temporal communication theory based on a software antenna, such as spatial and temporal channel modeling, equalization, optimum detection for a single user and multiple users in CDMA, precoding and joint optimization of both the transmitter and receiver. Such spatial and temporal processing promises drastic improvement of performance as a practical countermeasure for multipath fading in mobile radio communications.
{"title":"Software antenna and its communication theory for mobile radio communications","authors":"R. Kohno","doi":"10.1109/ICPWC.1997.655514","DOIUrl":"https://doi.org/10.1109/ICPWC.1997.655514","url":null,"abstract":"An adaptive array antenna or a smart antenna is named a software antenna because it can be programmable to form a desired beam pattern if an appropriate set of antenna weights is provided in software. It can be a typical tool for realizing a software radio. An adaptive array can be considered as an adaptive filter in the space and time domains for radio communications, so that the communication theory can be generalized from a conventional time domain into both the space and time domains. This paper introduces a spatial and temporal communication theory based on a software antenna, such as spatial and temporal channel modeling, equalization, optimum detection for a single user and multiple users in CDMA, precoding and joint optimization of both the transmitter and receiver. Such spatial and temporal processing promises drastic improvement of performance as a practical countermeasure for multipath fading in mobile radio communications.","PeriodicalId":166667,"journal":{"name":"1997 IEEE International Conference on Personal Wireless Communications (Cat. No.97TH8338)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134193888","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 : 1997-12-17DOI: 10.1109/ICPWC.1997.655493
S. Faruque
This paper presents a method of directional PN offset reuse plan for CDMA networks. In this method, the available 512 PN offsets are directionalized and reused in the same direction the antenna is pointing at. As a result, the number of dominant interfering cells are reduced, antenna engineering becomes more effective, thereby enhancing the pilot C/I margin.
{"title":"Directional PN offset reuse for CDMA deployment","authors":"S. Faruque","doi":"10.1109/ICPWC.1997.655493","DOIUrl":"https://doi.org/10.1109/ICPWC.1997.655493","url":null,"abstract":"This paper presents a method of directional PN offset reuse plan for CDMA networks. In this method, the available 512 PN offsets are directionalized and reused in the same direction the antenna is pointing at. As a result, the number of dominant interfering cells are reduced, antenna engineering becomes more effective, thereby enhancing the pilot C/I margin.","PeriodicalId":166667,"journal":{"name":"1997 IEEE International Conference on Personal Wireless Communications (Cat. No.97TH8338)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134291875","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 : 1997-12-17DOI: 10.1109/ICPWC.1997.655570
J. Sarker, Mahbub Hassan, A.Z.M.E. Hossain
Two types of errors are common in packet data transmission systems, namely the random single bit error and the burst error. We define the burst error as a consequence of the error in bits in a packet. The burst error can be independent or correlated with the single bit error within a packet, depending on the source of errors. Although the conventional models assume either independent or correlated errors, in many practical transmission systems, both types of errors are present. We propose and develop statistical models to compute the average bit error rate by simultaneously considering both the independent and the correlated errors. The results obtained from our models suggest that the conventional models may underestimate the actual bit error rate in certain systems. The proposed models are fairly general and may be applied to any transmission systems, including cellular systems, where the errors are affected by both the independent and correlated phenomena.
{"title":"Statistical modelling of correlated and independent errors in packet data transmission systems","authors":"J. Sarker, Mahbub Hassan, A.Z.M.E. Hossain","doi":"10.1109/ICPWC.1997.655570","DOIUrl":"https://doi.org/10.1109/ICPWC.1997.655570","url":null,"abstract":"Two types of errors are common in packet data transmission systems, namely the random single bit error and the burst error. We define the burst error as a consequence of the error in bits in a packet. The burst error can be independent or correlated with the single bit error within a packet, depending on the source of errors. Although the conventional models assume either independent or correlated errors, in many practical transmission systems, both types of errors are present. We propose and develop statistical models to compute the average bit error rate by simultaneously considering both the independent and the correlated errors. The results obtained from our models suggest that the conventional models may underestimate the actual bit error rate in certain systems. The proposed models are fairly general and may be applied to any transmission systems, including cellular systems, where the errors are affected by both the independent and correlated phenomena.","PeriodicalId":166667,"journal":{"name":"1997 IEEE International Conference on Personal Wireless Communications (Cat. No.97TH8338)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125164808","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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