Pub Date : 2002-08-07DOI: 10.1109/VTC.2002.1002915
D. Huang, J. Shi
Third generation mobile communications systems allow multiple mobile users to access and share radio resources. There are two objectives of radio resource management, quality of service for individual users and resource utilization for the system. This paper proposes a mechanism to maximize system throughput while maintaining quality of service for users of wireless data applications. The mechanism uses token bank leaky bucket (TBLB) for QoS provisioning followed by carrier-to-interference (C/I) based radio resource management for optimum system performance. This paper further evaluates the performance of the proposed mechanism with respect to data traffic models and compares it with popular scheduling schemes.
{"title":"Radio resource management for quality of service in third generation mobile communications","authors":"D. Huang, J. Shi","doi":"10.1109/VTC.2002.1002915","DOIUrl":"https://doi.org/10.1109/VTC.2002.1002915","url":null,"abstract":"Third generation mobile communications systems allow multiple mobile users to access and share radio resources. There are two objectives of radio resource management, quality of service for individual users and resource utilization for the system. This paper proposes a mechanism to maximize system throughput while maintaining quality of service for users of wireless data applications. The mechanism uses token bank leaky bucket (TBLB) for QoS provisioning followed by carrier-to-interference (C/I) based radio resource management for optimum system performance. This paper further evaluates the performance of the proposed mechanism with respect to data traffic models and compares it with popular scheduling schemes.","PeriodicalId":159750,"journal":{"name":"Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115152556","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 : 2002-08-07DOI: 10.1109/VTC.2002.1002538
Zhiwei Mao, V. Bhargava
Algorithms are developed to solve the power allocation problem at the base station (BS) under the constraints of BS transmission power and quality of service (QoS) for single-cell and multiple-cell direct-sequence code-division-multiple-access (DS-CDMA) systems supporting heterogeneous traffic, where a decorrelating detector is employed at the receiver. The presented numerical examples show that the unit transmission power allocation (UTXPA) algorithm offers performance close to that of the optimal algorithm with much reduced computational complexity.
{"title":"Power allocation for DS-CDMA system supporting heterogeneous traffic with decorrelating detector","authors":"Zhiwei Mao, V. Bhargava","doi":"10.1109/VTC.2002.1002538","DOIUrl":"https://doi.org/10.1109/VTC.2002.1002538","url":null,"abstract":"Algorithms are developed to solve the power allocation problem at the base station (BS) under the constraints of BS transmission power and quality of service (QoS) for single-cell and multiple-cell direct-sequence code-division-multiple-access (DS-CDMA) systems supporting heterogeneous traffic, where a decorrelating detector is employed at the receiver. The presented numerical examples show that the unit transmission power allocation (UTXPA) algorithm offers performance close to that of the optimal algorithm with much reduced computational complexity.","PeriodicalId":159750,"journal":{"name":"Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115599361","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 : 2002-08-07DOI: 10.1109/VTC.2002.1002892
Wei Wu, Hao Lin, Yong Ren, X. Shan
Wireless channels are error-prone and susceptible to several kinds of interference from different time scales, causing difficulties in the support of real-time multimedia services. This paper investigates the resource optimization and scheduling of wireless networks through a time-scale decomposition approach. We decompose the dynamics of time-varying wireless channel conditions into random processes in two different time scales and deal with the two time scales by two different algorithms: the resource optimizer optimizes the sum of utilities in the slowly changing time scale, and the slot scheduler exploits the efficiency in the highly variable time scale. Our scheme can obtain high system utilization and provide a minimum service guarantee simultaneously. Simulation results show that our scheme can improve substantially the performance and efficiency.
{"title":"A time-scale decomposition approach for efficient wireless resource utilization with minimum performance guarantees","authors":"Wei Wu, Hao Lin, Yong Ren, X. Shan","doi":"10.1109/VTC.2002.1002892","DOIUrl":"https://doi.org/10.1109/VTC.2002.1002892","url":null,"abstract":"Wireless channels are error-prone and susceptible to several kinds of interference from different time scales, causing difficulties in the support of real-time multimedia services. This paper investigates the resource optimization and scheduling of wireless networks through a time-scale decomposition approach. We decompose the dynamics of time-varying wireless channel conditions into random processes in two different time scales and deal with the two time scales by two different algorithms: the resource optimizer optimizes the sum of utilities in the slowly changing time scale, and the slot scheduler exploits the efficiency in the highly variable time scale. Our scheme can obtain high system utilization and provide a minimum service guarantee simultaneously. Simulation results show that our scheme can improve substantially the performance and efficiency.","PeriodicalId":159750,"journal":{"name":"Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115671105","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 : 2002-08-07DOI: 10.1109/VTC.2002.1002953
Milan Patel, I. Darwazeh, J. O'Reilly
To maximize reconfigurability in software radio receivers, digitization should occur as close to the antenna as possible. Bandpass sampling allows the digitization of bandpass signals at RF or intermediate frequencies without significantly increasing the sampling rate. This enables a more flexible receiver to be realized allowing for many radio functions to be defined in software. Sampling of signals at high carrier frequencies has associated problems such as the effects of aperture jitter. Jitter can limit the frequency at which digitization occurs and also degrade receiver performance. This paper investigates the effects of jitter on signal quality in bandpass sampling systems.
{"title":"Bandpass sampling for software radio receivers, and the effect of oversampling on aperture jitter","authors":"Milan Patel, I. Darwazeh, J. O'Reilly","doi":"10.1109/VTC.2002.1002953","DOIUrl":"https://doi.org/10.1109/VTC.2002.1002953","url":null,"abstract":"To maximize reconfigurability in software radio receivers, digitization should occur as close to the antenna as possible. Bandpass sampling allows the digitization of bandpass signals at RF or intermediate frequencies without significantly increasing the sampling rate. This enables a more flexible receiver to be realized allowing for many radio functions to be defined in software. Sampling of signals at high carrier frequencies has associated problems such as the effects of aperture jitter. Jitter can limit the frequency at which digitization occurs and also degrade receiver performance. This paper investigates the effects of jitter on signal quality in bandpass sampling systems.","PeriodicalId":159750,"journal":{"name":"Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123146186","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 : 2002-08-07DOI: 10.1109/VTC.2002.1002983
A. Annamalai, Gautam K. Deora, C. Tellambura
Motivated by practical considerations in the design of low-complexity receiver structures for wideband cellular CDMA, millimeter-wave and ultra-wideband communications, the study on the generalized selection combining receiver that adaptively combines a subset of M "strongest" paths out of L available paths has intensified over the past few years. The study on GSC(M, L) receiver is also important from a theoretical standpoint because this model encapsulates both the classical selection diversity and maximal-ratio combining (coherent detection) or post-detection equal-gain combining (noncoherent detection) receiver structures as limiting cases. We first derive a concise analytical expression for the moment generating function (MGF) of the GSC(M, L) output signal-to-noise ratio with independent and identically distributed diversity paths over Rician fading channels (in terms of only a single finite range integral whose integrand is composed of tabulated functions). Previous studies have only treated either Rayleigh or Nakagami-m (1960) channel models using numerous ad-hoc approaches to simplify an M-dimensional nested integral that arise in the computation of the MGF. The novelty of our mathematical framework for computing the MGF relies on the fact that it allows us to treat all common multipath fading channel models (Rayleigh, Rician, Nakagami-m and Nakagami-q) in a unified sense, it leads to a much More elegant and computationally efficient expression than those available in the literature, and it holds for any combinations of M and L values. Using this newly derived MGFs, we provide a unified error probability analysis for many coherent and noncoherent digital modulation/detection schemes in a myriad of fading environments.
{"title":"Unified error probability analysis for generalized selection diversity in Rician fading channels","authors":"A. Annamalai, Gautam K. Deora, C. Tellambura","doi":"10.1109/VTC.2002.1002983","DOIUrl":"https://doi.org/10.1109/VTC.2002.1002983","url":null,"abstract":"Motivated by practical considerations in the design of low-complexity receiver structures for wideband cellular CDMA, millimeter-wave and ultra-wideband communications, the study on the generalized selection combining receiver that adaptively combines a subset of M \"strongest\" paths out of L available paths has intensified over the past few years. The study on GSC(M, L) receiver is also important from a theoretical standpoint because this model encapsulates both the classical selection diversity and maximal-ratio combining (coherent detection) or post-detection equal-gain combining (noncoherent detection) receiver structures as limiting cases. We first derive a concise analytical expression for the moment generating function (MGF) of the GSC(M, L) output signal-to-noise ratio with independent and identically distributed diversity paths over Rician fading channels (in terms of only a single finite range integral whose integrand is composed of tabulated functions). Previous studies have only treated either Rayleigh or Nakagami-m (1960) channel models using numerous ad-hoc approaches to simplify an M-dimensional nested integral that arise in the computation of the MGF. The novelty of our mathematical framework for computing the MGF relies on the fact that it allows us to treat all common multipath fading channel models (Rayleigh, Rician, Nakagami-m and Nakagami-q) in a unified sense, it leads to a much More elegant and computationally efficient expression than those available in the literature, and it holds for any combinations of M and L values. Using this newly derived MGFs, we provide a unified error probability analysis for many coherent and noncoherent digital modulation/detection schemes in a myriad of fading environments.","PeriodicalId":159750,"journal":{"name":"Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121829428","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 : 2002-08-07DOI: 10.1109/VTC.2002.1002764
Tao Xiaofeng, Wang Shan, Li Yingqi, L. Baoling, Zhang Ping
The joint transmission (JT) technique was mainly presented by Baier et al. (2000). JT used in the downlink channel does not require a training sequence in the downlink in theory. Moreover, the mobile station (MS) does not demand channel estimation. However, JT requires a huge dynamic range and good linearity of the power amplifier of the transmitter because of the high peak to average ratio of transmitted signals of JT. In this paper, a new scheme called pre-distortion based joint transmission is proposed. Two pre-distortion approaches are also presented. One is based on the pre-clip technique, the other on a pre-nonlinear power amplifier. Finally, simulation results show that the pre-distortion based JT scheme has better BER performance and the BER performance of pre-distortion based JT under nonideal power amplifier is better than that of JT under ideal power amplifier. This is to say, maybe it is not worth compensating the deep channel shading.
联合传动(JT)技术主要由Baier et al.(2000)提出。在下行信道中使用的JT理论上不需要在下行信道中使用训练序列。此外，移动台(MS)不需要信道估计。但由于JT传输信号的峰均比高，因此对发射机功率放大器的动态范围要求大，线性度要求好。本文提出了一种基于预失真的联合传动方案。提出了两种预失真方法。一种是基于预夹技术，另一种是基于预非线性功率放大器。最后，仿真结果表明，基于预失真的JT方案具有更好的误码率性能，且在非理想功率放大器条件下，基于预失真的JT方案的误码率优于理想功率放大器条件下的JT方案。这是说，也许不值得补偿深通道遮光。
{"title":"Pre-distortion based joint transmission","authors":"Tao Xiaofeng, Wang Shan, Li Yingqi, L. Baoling, Zhang Ping","doi":"10.1109/VTC.2002.1002764","DOIUrl":"https://doi.org/10.1109/VTC.2002.1002764","url":null,"abstract":"The joint transmission (JT) technique was mainly presented by Baier et al. (2000). JT used in the downlink channel does not require a training sequence in the downlink in theory. Moreover, the mobile station (MS) does not demand channel estimation. However, JT requires a huge dynamic range and good linearity of the power amplifier of the transmitter because of the high peak to average ratio of transmitted signals of JT. In this paper, a new scheme called pre-distortion based joint transmission is proposed. Two pre-distortion approaches are also presented. One is based on the pre-clip technique, the other on a pre-nonlinear power amplifier. Finally, simulation results show that the pre-distortion based JT scheme has better BER performance and the BER performance of pre-distortion based JT under nonideal power amplifier is better than that of JT under ideal power amplifier. This is to say, maybe it is not worth compensating the deep channel shading.","PeriodicalId":159750,"journal":{"name":"Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117062697","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 : 2002-08-07DOI: 10.1109/VTC.2002.1002961
Young-Chai Ko
A new technique based on the auto-correlation function is described for the estimation of the Doppler spread in mobile communication systems. We first propose to divide a uncertainty region of Doppler spread into multiple frequency bins. Based on the given multiple bins the correlator compares the estimated value at a certain time index to the theoretical exact value and then decides which bin the Doppler spread is estimated in. The certain time index can be optimized to give the largest decision region among multiple bins. We derive the optimum time index algorithm to give the largest decision region for each bin based on Rayleigh fading channel. We also apply the same Doppler spread estimator to the Rician case with the slight transformation of the received signal. We show that the proposed technique is not affected significantly by the Rician factor and the SNR degradation with the reasonable number of samples for estimation which is not the case of other estimators given in the literature.
{"title":"Doppler spread estimation in mobile communication systems","authors":"Young-Chai Ko","doi":"10.1109/VTC.2002.1002961","DOIUrl":"https://doi.org/10.1109/VTC.2002.1002961","url":null,"abstract":"A new technique based on the auto-correlation function is described for the estimation of the Doppler spread in mobile communication systems. We first propose to divide a uncertainty region of Doppler spread into multiple frequency bins. Based on the given multiple bins the correlator compares the estimated value at a certain time index to the theoretical exact value and then decides which bin the Doppler spread is estimated in. The certain time index can be optimized to give the largest decision region among multiple bins. We derive the optimum time index algorithm to give the largest decision region for each bin based on Rayleigh fading channel. We also apply the same Doppler spread estimator to the Rician case with the slight transformation of the received signal. We show that the proposed technique is not affected significantly by the Rician factor and the SNR degradation with the reasonable number of samples for estimation which is not the case of other estimators given in the literature.","PeriodicalId":159750,"journal":{"name":"Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127104997","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 : 2002-08-07DOI: 10.1109/VTC.2002.1002552
Jing Wang, Yan Yao, Ming Zhao, Shidong Zhou, Yi Wang, Xin Su
Research on next generation wireless communications integrated with current wireline networks is a potential issue considered worldwide. A novel wireless system, called distributed wireless communication system (DWCS), is proposed. Logically, it is divided into four layers. They are distributed antennas, a distributed fiber-optic transmission network, distributed processing network and a distributed core network. To support different radio access standards, the distributed processing network is realized with a software radio technique. Also, some new concepts, such virtual cell and virtual tunnel is proposed for DWCS. It is foreseen that the DWCS has three phases of development and how it conforms with the Internet is considered. Thus, the DWCS is a system that depends not only on wireless technologies, but also on Internet technologies. In terms of our description, the DWCS has the characteristics of an open distributed system with flexibility, scalability and expansibility.
{"title":"Conceptual platform of distributed wireless communication system","authors":"Jing Wang, Yan Yao, Ming Zhao, Shidong Zhou, Yi Wang, Xin Su","doi":"10.1109/VTC.2002.1002552","DOIUrl":"https://doi.org/10.1109/VTC.2002.1002552","url":null,"abstract":"Research on next generation wireless communications integrated with current wireline networks is a potential issue considered worldwide. A novel wireless system, called distributed wireless communication system (DWCS), is proposed. Logically, it is divided into four layers. They are distributed antennas, a distributed fiber-optic transmission network, distributed processing network and a distributed core network. To support different radio access standards, the distributed processing network is realized with a software radio technique. Also, some new concepts, such virtual cell and virtual tunnel is proposed for DWCS. It is foreseen that the DWCS has three phases of development and how it conforms with the Internet is considered. Thus, the DWCS is a system that depends not only on wireless technologies, but also on Internet technologies. In terms of our description, the DWCS has the characteristics of an open distributed system with flexibility, scalability and expansibility.","PeriodicalId":159750,"journal":{"name":"Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367)","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127227181","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 : 2002-08-07DOI: 10.1109/VTC.2002.1002648
N. Maeda, H. Atarashi, S. Abeta, M. Sawahashi
This paper proposes a pilot channel assisted minimum mean square error (MMSE) combining scheme in orthogonal frequency and code division multiplexing (OFCDM) based on actual signal-to-interference power ratio (SIR) estimation and investigates the throughput performance in a broadband channel with a near 100-MHz bandwidth. In the proposed MMSE combining scheme, the combining weight of each sub-carrier component is accurately estimated from the channel gain, noise power, and transmission power ratio of all the code-multiplexed channels to the desired one, by exploiting the time-multiplexed common pilot channel in addition. to the coded data channel. Simulation results elucidate that the required average received signal energy per bit-to-noise spectrum density ratio (E/sub b//N/sub 0/) for the average packet error rate (PER)=10/sup -2/ is improved by 0.6 and 1.2 dB by using the proposed MMSE combining Instead-of the conventional equal gain combining (EGC) in a 24-path Rayleigh fading channel (exponential decay path model, maximum delay time is approximately 1 /spl mu/sec) in an isolated cell environment, when the number of multiplexed codes = 8 and 32, respectively, with the spreading factor of 32. Furthermore, when the average received E/sub b//N/sub 0/=10 dB, the achievable throughput, i.e., the number of simultaneously multiplexed codes for the average PER=10/sup -2/ in the proposed MMSE combining, is increased by approximately 1.3 fold that of the conventional EGC.
{"title":"Performance of forward link broadband OFCDM packet wireless access using MMSE combining scheme based on SIR estimation","authors":"N. Maeda, H. Atarashi, S. Abeta, M. Sawahashi","doi":"10.1109/VTC.2002.1002648","DOIUrl":"https://doi.org/10.1109/VTC.2002.1002648","url":null,"abstract":"This paper proposes a pilot channel assisted minimum mean square error (MMSE) combining scheme in orthogonal frequency and code division multiplexing (OFCDM) based on actual signal-to-interference power ratio (SIR) estimation and investigates the throughput performance in a broadband channel with a near 100-MHz bandwidth. In the proposed MMSE combining scheme, the combining weight of each sub-carrier component is accurately estimated from the channel gain, noise power, and transmission power ratio of all the code-multiplexed channels to the desired one, by exploiting the time-multiplexed common pilot channel in addition. to the coded data channel. Simulation results elucidate that the required average received signal energy per bit-to-noise spectrum density ratio (E/sub b//N/sub 0/) for the average packet error rate (PER)=10/sup -2/ is improved by 0.6 and 1.2 dB by using the proposed MMSE combining Instead-of the conventional equal gain combining (EGC) in a 24-path Rayleigh fading channel (exponential decay path model, maximum delay time is approximately 1 /spl mu/sec) in an isolated cell environment, when the number of multiplexed codes = 8 and 32, respectively, with the spreading factor of 32. Furthermore, when the average received E/sub b//N/sub 0/=10 dB, the achievable throughput, i.e., the number of simultaneously multiplexed codes for the average PER=10/sup -2/ in the proposed MMSE combining, is increased by approximately 1.3 fold that of the conventional EGC.","PeriodicalId":159750,"journal":{"name":"Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367)","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127345231","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 : 2002-08-07DOI: 10.1109/VTC.2002.1002793
J. Barta, S. Petersson, B. Hagerman
Advanced antenna technologies are identified as one of the key techniques to improve the capacity and coverage of third generation WCDMA (FDD) systems. Advanced antennas can solve the capacity limitations in certain urban cells. Furthermore, they can also extend the coverage of large rural cells. The goal of this contribution is to highlight the downlink capacity and coverage gains and show the potential in capacity and coverage trade-offs for a WCDMA downlink provided by the use of advanced antenna systems installed at WCDMA base stations.
{"title":"Downlink capacity and coverage trade-offs in WCDMA with advanced antenna systems","authors":"J. Barta, S. Petersson, B. Hagerman","doi":"10.1109/VTC.2002.1002793","DOIUrl":"https://doi.org/10.1109/VTC.2002.1002793","url":null,"abstract":"Advanced antenna technologies are identified as one of the key techniques to improve the capacity and coverage of third generation WCDMA (FDD) systems. Advanced antennas can solve the capacity limitations in certain urban cells. Furthermore, they can also extend the coverage of large rural cells. The goal of this contribution is to highlight the downlink capacity and coverage gains and show the potential in capacity and coverage trade-offs for a WCDMA downlink provided by the use of advanced antenna systems installed at WCDMA base stations.","PeriodicalId":159750,"journal":{"name":"Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125024573","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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