Pub Date : 1998-10-05DOI: 10.1109/ICUPC.1998.732820
A. Lozano, Donald Co, Cox, Terry R Bourk
An important aspect of any channel assignment algorithm should be balancing the performance of uplink and downlink. Differences in receiver performance, diversity and transmit power used at mobiles and base stations are potential sources of imbalance. In addition, there is a fundamental asymmetry between uplink and downlink interference caused by the locations of mobiles and base stations. We investigate the nature of this asymmetry and prove that the uplink frequently has worse interference. Furthermore, this difference shows little dependence on the degree of mobility and is basically associated with the location of mobiles rather than their speed.
{"title":"Uplink-downlink imbalance in TDMA personal communication systems","authors":"A. Lozano, Donald Co, Cox, Terry R Bourk","doi":"10.1109/ICUPC.1998.732820","DOIUrl":"https://doi.org/10.1109/ICUPC.1998.732820","url":null,"abstract":"An important aspect of any channel assignment algorithm should be balancing the performance of uplink and downlink. Differences in receiver performance, diversity and transmit power used at mobiles and base stations are potential sources of imbalance. In addition, there is a fundamental asymmetry between uplink and downlink interference caused by the locations of mobiles and base stations. We investigate the nature of this asymmetry and prove that the uplink frequently has worse interference. Furthermore, this difference shows little dependence on the degree of mobility and is basically associated with the location of mobiles rather than their speed.","PeriodicalId":341069,"journal":{"name":"ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130175822","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 : 1998-10-05DOI: 10.1109/ICUPC.1998.732807
K. Al Agha, D. Zeghlache
To achieve the best possible bandwidth utilization in wireless networks adaptive resource assignment is a requirement. Distributed or centralized resource allocation schemes can be used to reach such an objective. However, the means to actually implement these resource adaptive features represent a major implementation challenge. In addition, the schemes should be self adaptive and eventually self learning since large scale traffic variations on an hourly and a daily basis exhibit patterns with low expected variance. At a much finer scale, in micro and pico cellular environments variations due to user mobility are unpredictable and only dynamic channel allocation methods can adequately adapt to the rather large traffic variations. This contribution relates to the larger scale traffic variations and proposes an adaptive resource assignment approach based on the multi-agent technique which relies on self learning. The adaptive resource allocation scheme "channel segregation (CS)" containing inherently the self learning attribute was selected to test and validate the concept of using intelligent agents in base stations. Using the multi-agent platform DIMA (development and implementation of multi agent system), CS has been integrated and implemented in a simulation model of base stations to introduce the self learning feature in the network. The obtained simulation results validate the intelligent agent implementation and illustrate the feasibility of using such agents in base stations to introduce the self adaptive feature in mobile networks.
为了在无线网络中实现最佳的带宽利用率，需要自适应资源分配。可以使用分布式或集中式资源分配方案来实现这一目标。然而，实际实现这些资源自适应特性的方法代表了一个主要的实现挑战。此外，这些方案应该是自适应的，并且最终是自学习的，因为每小时和每天的大规模交通变化表现出低预期方差的模式。在更精细的尺度上，在微蜂窝和微蜂窝环境中，由于用户移动性引起的变化是不可预测的，只有动态信道分配方法才能充分适应相当大的流量变化。这一贡献涉及到更大规模的流量变化，并提出了一种基于自学习的多智能体技术的自适应资源分配方法。选择包含固有自学习属性的自适应资源分配方案“信道隔离(CS)”来测试和验证在基站中使用智能代理的概念。利用多智能体平台DIMA (development and implementation of multi agent system)，将CS集成并实现在一个基站仿真模型中，以引入网络中的自学习特性。仿真结果验证了智能代理的实现，说明了在基站中使用智能代理引入移动网络自适应特性的可行性。
{"title":"A communicating scheme for adaptive resource allocation in wireless networks","authors":"K. Al Agha, D. Zeghlache","doi":"10.1109/ICUPC.1998.732807","DOIUrl":"https://doi.org/10.1109/ICUPC.1998.732807","url":null,"abstract":"To achieve the best possible bandwidth utilization in wireless networks adaptive resource assignment is a requirement. Distributed or centralized resource allocation schemes can be used to reach such an objective. However, the means to actually implement these resource adaptive features represent a major implementation challenge. In addition, the schemes should be self adaptive and eventually self learning since large scale traffic variations on an hourly and a daily basis exhibit patterns with low expected variance. At a much finer scale, in micro and pico cellular environments variations due to user mobility are unpredictable and only dynamic channel allocation methods can adequately adapt to the rather large traffic variations. This contribution relates to the larger scale traffic variations and proposes an adaptive resource assignment approach based on the multi-agent technique which relies on self learning. The adaptive resource allocation scheme \"channel segregation (CS)\" containing inherently the self learning attribute was selected to test and validate the concept of using intelligent agents in base stations. Using the multi-agent platform DIMA (development and implementation of multi agent system), CS has been integrated and implemented in a simulation model of base stations to introduce the self learning feature in the network. The obtained simulation results validate the intelligent agent implementation and illustrate the feasibility of using such agents in base stations to introduce the self adaptive feature in mobile networks.","PeriodicalId":341069,"journal":{"name":"ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384)","volume":"123 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114225621","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 : 1998-10-05DOI: 10.1109/ICUPC.1998.733033
G. Mazzini
This paper presents and analyzes a new multiple access scheme, which is power diversity based, for an asynchronous environment. The key idea is to have different received power for each user in order to permit successive reception based on cochannel interference cancellation. No other kinds of diversity are considered in order to keep the system complexity low and to focus the attention on the power division access theory. Furthermore, all users access the same band at the same time without a code signature.
{"title":"Power division multiple access","authors":"G. Mazzini","doi":"10.1109/ICUPC.1998.733033","DOIUrl":"https://doi.org/10.1109/ICUPC.1998.733033","url":null,"abstract":"This paper presents and analyzes a new multiple access scheme, which is power diversity based, for an asynchronous environment. The key idea is to have different received power for each user in order to permit successive reception based on cochannel interference cancellation. No other kinds of diversity are considered in order to keep the system complexity low and to focus the attention on the power division access theory. Furthermore, all users access the same band at the same time without a code signature.","PeriodicalId":341069,"journal":{"name":"ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384)","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114855925","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 : 1998-10-05DOI: 10.1109/ICUPC.1998.733047
H. Wakana, H. Saito, S. Yamamoto, Huan-Bang Li, M. Tanaka
We present the Communications and Broadcasting Engineering Test Satellite (COMETS) payload configuration and experimental systems for the Ka-band and millimeter-wave mobile satellite communications as well as the developed ground terminals. The COMETS carries multibeam antennas, an SCPC/TDM regenerative transponder, and LF filter matrices for direct mobile-to-mobile communications and interconnection between multibeams. For mobile terminals, several antennas such as an active phased array antenna, a torus-reflector antenna, and a waveguide slot array antenna were developed. For personal satellite communications, a Ka-band portable terminal, which can achieve direct user-to-user communications using the on-board regenerative transponder, was developed.
{"title":"COMETS experiments for Ka-band and millimeter-wave advanced mobile satellite communications","authors":"H. Wakana, H. Saito, S. Yamamoto, Huan-Bang Li, M. Tanaka","doi":"10.1109/ICUPC.1998.733047","DOIUrl":"https://doi.org/10.1109/ICUPC.1998.733047","url":null,"abstract":"We present the Communications and Broadcasting Engineering Test Satellite (COMETS) payload configuration and experimental systems for the Ka-band and millimeter-wave mobile satellite communications as well as the developed ground terminals. The COMETS carries multibeam antennas, an SCPC/TDM regenerative transponder, and LF filter matrices for direct mobile-to-mobile communications and interconnection between multibeams. For mobile terminals, several antennas such as an active phased array antenna, a torus-reflector antenna, and a waveguide slot array antenna were developed. For personal satellite communications, a Ka-band portable terminal, which can achieve direct user-to-user communications using the on-board regenerative transponder, was developed.","PeriodicalId":341069,"journal":{"name":"ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129403952","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 : 1998-10-05DOI: 10.1109/ICUPC.1998.733654
H. Furukawa
This paper proposes a new closed loop form of downlink transmission power control (TPC) which can resolve the interference increase problem due to multiple site transmission during soft hand-over (SHO). In the proposed method, base stations (BSs) connecting to a mobile station (MS) with non-minimum path loss reduce their power gradually to reach a minimum level. A BS with a minimum path loss in the active set, on the other hand, controls its own power to keep the signal quality received in the MS at a constant level. The BS selection is carried out using the TPC signal derived as a fine combination of power-up/power-down signal and a primary BS identification number. The capacity of the proposed TPC is compared with other TPC methods including a conventional one in which the power of BSs in the same active set is equally controlled. The simulations indicate that the capacity of the proposed TPC is higher than that of the conventional TPC and it is comparable with that of an ideal instantaneous hard hand-over system.
{"title":"Site selection transmission power control in DS-CDMA cellular downlink","authors":"H. Furukawa","doi":"10.1109/ICUPC.1998.733654","DOIUrl":"https://doi.org/10.1109/ICUPC.1998.733654","url":null,"abstract":"This paper proposes a new closed loop form of downlink transmission power control (TPC) which can resolve the interference increase problem due to multiple site transmission during soft hand-over (SHO). In the proposed method, base stations (BSs) connecting to a mobile station (MS) with non-minimum path loss reduce their power gradually to reach a minimum level. A BS with a minimum path loss in the active set, on the other hand, controls its own power to keep the signal quality received in the MS at a constant level. The BS selection is carried out using the TPC signal derived as a fine combination of power-up/power-down signal and a primary BS identification number. The capacity of the proposed TPC is compared with other TPC methods including a conventional one in which the power of BSs in the same active set is equally controlled. The simulations indicate that the capacity of the proposed TPC is higher than that of the conventional TPC and it is comparable with that of an ideal instantaneous hard hand-over system.","PeriodicalId":341069,"journal":{"name":"ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129380466","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 : 1998-10-05DOI: 10.1109/ICUPC.1998.732831
E. Costamagna, L. Favalli, P. Gamba, P. Savazzi
This work introduces a novel approach to model mobile channels (in particular, DECT ones) by means of non-linear equations based on the chaos theory. A simple procedure to extract meaningful statistics, well matched with those obtained by a standard generative model is presented. The proposed "chaotic" approach seems to be sufficiently powerful to let one model by means of quasi-deterministic equations the apparently random behavior of block errors in digital transmission over mobile channels. Two numerical experiments supporting the idea are shown and discussed.
{"title":"A block-error simulator for mobile channels based on non-linear chaos equations","authors":"E. Costamagna, L. Favalli, P. Gamba, P. Savazzi","doi":"10.1109/ICUPC.1998.732831","DOIUrl":"https://doi.org/10.1109/ICUPC.1998.732831","url":null,"abstract":"This work introduces a novel approach to model mobile channels (in particular, DECT ones) by means of non-linear equations based on the chaos theory. A simple procedure to extract meaningful statistics, well matched with those obtained by a standard generative model is presented. The proposed \"chaotic\" approach seems to be sufficiently powerful to let one model by means of quasi-deterministic equations the apparently random behavior of block errors in digital transmission over mobile channels. Two numerical experiments supporting the idea are shown and discussed.","PeriodicalId":341069,"journal":{"name":"ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130214900","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 : 1998-10-05DOI: 10.1109/ICUPC.1998.733630
S. K. Biswas, H.C. Kim, P. Narasimhan, R. Siracusa, C. Johnston
This paper presents a data link control (DLC) framework for transporting constant bit rate (CBR) traffic over wireless ATM links. The purpose of DLC in wireless is to provide error-free services to the higher layers by recovering corrupted cells. A selective reject (SREJ) automatic repeat request (ARQ) based DLC protocol is used for CBR error recovery. For an ARQ based scheme, higher recovery rates can be achieved with larger cell transfer delay, caused by cell retransmissions. Since cell transfer delay and DLC recovery rate both can translate to user-perceivable quality of service (QoS), it is important for the DLC to strike a balance between these two, depending on the application's requirements. To achieve this in our protocol, the retransmission procedure for a CBR cell is constrained to complete within a recovery time interval which is specified by the application at call-setup time. Also, a novel jitter removal algorithm, which reduces the cell delay variation caused by cell loss and retransmissions, is incorporated as a part of the DLC protocol. The proposed protocol is implemented on NEC's WATMnet prototype system. The implementation and its experimental results are reported for illustrating the performance and feasibility of the presented CBR DLC protocol. The experimental results show that the DLC protocol can be successfully applied for error recovery of CBR traffic on a per-connection basis. These also indicate that the DLC can be programmed to attain a desirable tradeoff between cell transfer delay and cell recovery rate.
{"title":"Design and implementation of data-link control protocol for CBR traffic in wireless ATM networks","authors":"S. K. Biswas, H.C. Kim, P. Narasimhan, R. Siracusa, C. Johnston","doi":"10.1109/ICUPC.1998.733630","DOIUrl":"https://doi.org/10.1109/ICUPC.1998.733630","url":null,"abstract":"This paper presents a data link control (DLC) framework for transporting constant bit rate (CBR) traffic over wireless ATM links. The purpose of DLC in wireless is to provide error-free services to the higher layers by recovering corrupted cells. A selective reject (SREJ) automatic repeat request (ARQ) based DLC protocol is used for CBR error recovery. For an ARQ based scheme, higher recovery rates can be achieved with larger cell transfer delay, caused by cell retransmissions. Since cell transfer delay and DLC recovery rate both can translate to user-perceivable quality of service (QoS), it is important for the DLC to strike a balance between these two, depending on the application's requirements. To achieve this in our protocol, the retransmission procedure for a CBR cell is constrained to complete within a recovery time interval which is specified by the application at call-setup time. Also, a novel jitter removal algorithm, which reduces the cell delay variation caused by cell loss and retransmissions, is incorporated as a part of the DLC protocol. The proposed protocol is implemented on NEC's WATMnet prototype system. The implementation and its experimental results are reported for illustrating the performance and feasibility of the presented CBR DLC protocol. The experimental results show that the DLC protocol can be successfully applied for error recovery of CBR traffic on a per-connection basis. These also indicate that the DLC can be programmed to attain a desirable tradeoff between cell transfer delay and cell recovery rate.","PeriodicalId":341069,"journal":{"name":"ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128792832","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 : 1998-10-05DOI: 10.1109/ICUPC.1998.732817
M. Akther, J. Asenstorfer, P. Alexander, M. Reed
We consider a matrix algebraic approach to describe the multi-carrier CDMA (MC-CDMA) system with forward error control coding. We consider the uplink of a mobile communications system and derive the frequency selective channel model and show its similarity with the DS-CDMA channel. We therefore take advantage of a previously published technique that combines iterative decoding and interference cancellation to reduce the multiuser interference (MUI) present in the system and show that the performance approaches single user performance even for moderate signal to noise ratios.
{"title":"Performance of multi-carrier CDMA with iterative detection","authors":"M. Akther, J. Asenstorfer, P. Alexander, M. Reed","doi":"10.1109/ICUPC.1998.732817","DOIUrl":"https://doi.org/10.1109/ICUPC.1998.732817","url":null,"abstract":"We consider a matrix algebraic approach to describe the multi-carrier CDMA (MC-CDMA) system with forward error control coding. We consider the uplink of a mobile communications system and derive the frequency selective channel model and show its similarity with the DS-CDMA channel. We therefore take advantage of a previously published technique that combines iterative decoding and interference cancellation to reduce the multiuser interference (MUI) present in the system and show that the performance approaches single user performance even for moderate signal to noise ratios.","PeriodicalId":341069,"journal":{"name":"ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128877481","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 : 1998-10-05DOI: 10.1109/ICUPC.1998.733060
D. Raphaeli
A very efficient procedure is introduced for computing the DFE coefficients for wireless packet type modems. The technique is especially suited for hardware VLSI implementation. After the channel impulse response is estimated using a short preamble, the Gauss-Siedel iterative algorithm is efficiently used to compute the DFE coefficients. The algorithm is derived and results are shown for both for QPSK and for GMSK modulations on indoor multipath channels.
{"title":"Efficient DFE initialization for high speed wireless LAN","authors":"D. Raphaeli","doi":"10.1109/ICUPC.1998.733060","DOIUrl":"https://doi.org/10.1109/ICUPC.1998.733060","url":null,"abstract":"A very efficient procedure is introduced for computing the DFE coefficients for wireless packet type modems. The technique is especially suited for hardware VLSI implementation. After the channel impulse response is estimated using a short preamble, the Gauss-Siedel iterative algorithm is efficiently used to compute the DFE coefficients. The algorithm is derived and results are shown for both for QPSK and for GMSK modulations on indoor multipath channels.","PeriodicalId":341069,"journal":{"name":"ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127826302","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 : 1998-10-05DOI: 10.1109/ICUPC.1998.733002
J.H. Lee, J. Roh, J. Kwun, C. Kang
We consider the simulcasting system using distributed antennas in the DS-CDMA system. The simulcasting system in which the same signal is broadcast simultaneously by distributed antenna ports in a cell can reduce both the blocking probability of a call in a shadowing region and the handoff attempt rate. We propose a controlled distributed antenna system to improve the Eb/Io in both links of the DS-CDMA simulcasting system. It is shown by simulation that improvement in the forward link Eb/Io can be achieved if the ERPs of those ports located far from the considered mobile are reduced to eliminate unwanted interference to other mobiles. It is also shown that the reverse link Eb/Io can be improved by selection diversity combining.
{"title":"A controlled distributed antenna system for increasing capacity in the DS-CDMA system","authors":"J.H. Lee, J. Roh, J. Kwun, C. Kang","doi":"10.1109/ICUPC.1998.733002","DOIUrl":"https://doi.org/10.1109/ICUPC.1998.733002","url":null,"abstract":"We consider the simulcasting system using distributed antennas in the DS-CDMA system. The simulcasting system in which the same signal is broadcast simultaneously by distributed antenna ports in a cell can reduce both the blocking probability of a call in a shadowing region and the handoff attempt rate. We propose a controlled distributed antenna system to improve the Eb/Io in both links of the DS-CDMA simulcasting system. It is shown by simulation that improvement in the forward link Eb/Io can be achieved if the ERPs of those ports located far from the considered mobile are reduced to eliminate unwanted interference to other mobiles. It is also shown that the reverse link Eb/Io can be improved by selection diversity combining.","PeriodicalId":341069,"journal":{"name":"ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130501565","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：