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IEEE International Symposium on Personal, Indoor and Mobile Radio Communications最新文献

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Time-of-arrival estimation for E-OTD location in GERAN GERAN中E-OTD定位的到达时间估计
IEEE International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2001-09-30 DOI: 10.1109/PIMRC.2001.965308
Sven Fischer, Ari Kangas Ericsson
{"title":"Time-of-arrival estimation for E-OTD location in GERAN","authors":"Sven Fischer, Ari Kangas Ericsson","doi":"10.1109/PIMRC.2001.965308","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965308","url":null,"abstract":"In this paper, the problem of time-of-arrival (TOA) estimation for E-OTD location in a GSM/EDGE Radio Access Network (GERAN) is described. To increase the number of available bursts for TOA estimation (and therefore increase the accuracy), the mobile can use bursts from all time slots. However, this requires that the TOA estimation algorithm is able to handle GMSK and 8PSK bursts without a-priori knowledge about the modulation scheme. In this paper, the mutual effect of different modulation formats on the TOA estimation performance for E-OTD location is investigated. A TOA estimation algorithm is described, which does not require a blind detection of the modulation scheme.","PeriodicalId":161972,"journal":{"name":"IEEE International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133227673","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}
引用次数: 10
Robust QAM modulation classification via moment matrices 基于矩矩阵的稳健QAM调制分类
IEEE International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2000-09-18 DOI: 10.1109/PIMRC.2000.881405
H. Hadinejad-Mahram, A. Hero
{"title":"Robust QAM modulation classification via moment matrices","authors":"H. Hadinejad-Mahram, A. Hero","doi":"10.1109/PIMRC.2000.881405","DOIUrl":"https://doi.org/10.1109/PIMRC.2000.881405","url":null,"abstract":"We discuss a method for classification of digitally modulated signals based on performing subspace decomposition on a positive definite matrix of higher order moments of the received signals. Specifically, we specialize a general approach originally introduced for detection and classification of noise contaminated patterns to the case of digitally modulated signals such as M-ary PSK and QAM. We consider two different classifiers: one that provides only satisfactory performance for high signal-to-noise ratio, and one that performs also well in the low SNR regime. The former has the additional advantage of being invariant to both unknown phase angle (rotation) and signal amplitude, and can be used for all QAM signal constellations (including M-ary PSK), whereas the latter is only used for discrimination of M-ary PSK signals. Using simulation, we analyze the performance of the proposed classifier for transmission over the additive white Gaussian noise channel and both coherent and non-coherent reception. Moreover, the robustness of the classifier against mismatched noise modeling is discussed.","PeriodicalId":161972,"journal":{"name":"IEEE International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127638665","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}
引用次数: 9
Multi-sensor reception for TDD-UMTS mobile terminal in indoor and pedestrian environments 多传感器接收TDD-UMTS移动终端在室内和行人环境
IEEE International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2000-09-18 DOI: 10.1109/PIMRC.2000.881613
L. Ros, G. Jourdain, M. Arndt
{"title":"Multi-sensor reception for TDD-UMTS mobile terminal in indoor and pedestrian environments","authors":"L. Ros, G. Jourdain, M. Arndt","doi":"10.1109/PIMRC.2000.881613","DOIUrl":"https://doi.org/10.1109/PIMRC.2000.881613","url":null,"abstract":"In the downlink TD/CDMA multiple access scheme through a multipath channel, the use of a short complex code enables a strategy of multi-user detection with great sensibility improvement compared to the traditional matched filter. Nevertheless, the performances are damaged compared to the situation with an ideal channel, more especially as the number of users increases. In this paper, we first use the cross-spectral matrix of the aliased coded channels to recall linear multi-user detector (ZF and MMSE) and express a degradation factor of interference and noise to signal ratio due to a non-ideal channel, with or without fading. The degradation and bit error probability are then computed in the concrete situation of indoor and pedestrian channel environments in order to show the great benefit of one or two supplementary sensors at the reception system.","PeriodicalId":161972,"journal":{"name":"IEEE International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"525 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117224061","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}
引用次数: 2
Time of arrival estimation of narrowband TDMA signals for mobile positioning 用于移动定位的窄带TDMA信号到达时间估计
IEEE International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 1998-09-08 DOI: 10.1109/PIMRC.1998.733607
Sven Fischer, H. Grubeck, Ari Kangas Ericsson, H. Koorapaty, E. Larsson, Patrik Lundqvist
{"title":"Time of arrival estimation of narrowband TDMA signals for mobile positioning","authors":"Sven Fischer, H. Grubeck, Ari Kangas Ericsson, H. Koorapaty, E. Larsson, Patrik Lundqvist","doi":"10.1109/PIMRC.1998.733607","DOIUrl":"https://doi.org/10.1109/PIMRC.1998.733607","url":null,"abstract":"Positioning services in cellular systems have received increased attention recently. Solutions of the positioning problem requiring time and angle of arrival measurements have been proposed. The problem of estimating the time of arrival (TOA) of the line of sight (LOS) component of narrowband digital signals in a multipath environment is addressed. A TOA estimation algorithm designed to operate under low SNR is proposed. The algorithm combats multipath propagation by exploiting the fading statistics of the mobile channel. Performance of the algorithm obtained through simulations using COST propagation models for GSM and IS-136 signals is shown and is promising.","PeriodicalId":161972,"journal":{"name":"IEEE International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124597206","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}
引用次数: 37
A simple algorithm to distribute optimally a number of external base stations in a microcellular environment 在微蜂窝环境中最优分配多个外部基站的简单算法
IEEE International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 1998-09-08 DOI: 10.1109/PIMRC.1998.734713
R. Agustí, X. Querol, J. Pérez-Romero
{"title":"A simple algorithm to distribute optimally a number of external base stations in a microcellular environment","authors":"R. Agustí, X. Querol, J. Pérez-Romero","doi":"10.1109/PIMRC.1998.734713","DOIUrl":"https://doi.org/10.1109/PIMRC.1998.734713","url":null,"abstract":"A simple algorithm is proposed for the optimal distribution of a number of base stations in a microcellular environment. Criteria are defined in order to decide the combinations of antennas that should be tested, and a quality factor is proposed to compare them. Results are presented for a specific environment.","PeriodicalId":161972,"journal":{"name":"IEEE International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130646352","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}
引用次数: 0
Research on Optimality of Centralized Scheduling and Distributed Rate Control 集中调度与分布式速率控制的最优性研究
IEEE International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 1900-01-01 DOI: 10.1109/PIMRC.2007.4394212
Yuehong Gao, Ruiming Zheng, Xin Zhang, Dacheng Yang
{"title":"Research on Optimality of Centralized Scheduling and Distributed Rate Control","authors":"Yuehong Gao, Ruiming Zheng, Xin Zhang, Dacheng Yang","doi":"10.1109/PIMRC.2007.4394212","DOIUrl":"https://doi.org/10.1109/PIMRC.2007.4394212","url":null,"abstract":"On the reverse link of CDMA systems, two options are possible for resource allocation: rate control (RC) and centralized scheduling (CS). The rate control algorithm can be further divided into Common Rate Control (CRC) and Dedicated Rate Control (DRC). In CRC, each mobile station (MS) independently determines its reverse link rate using the system interference level information broadcasted by a base station (BSs) and rate control mechanism at the MS side. While in DRC, the BS sends each MS a rate movement command. On the other hand, centralized scheduling directly assigns reverse link rates to a subset of MSs. In this paper, the Token Bucket based Common Rate Control (TB- CRC) mechanism is discussed and compared with the centralize scheduling. Performances have been evaluated through system level simulation. It is shown that the token bucket based rate control philosophy outperforms the centralized scheduling from the aspect of throughput, fairness, system stability, signaling overhead and transmission delay.","PeriodicalId":161972,"journal":{"name":"IEEE International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114816417","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}
引用次数: 1
Impact of timing error on BER performance of TDD pre-equalized OFDM systems 定时误差对TDD预均衡OFDM系统误码率性能的影响
IEEE International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 1900-01-01 DOI: 10.1109/PIMRC.2004.1370963
Dawei Liu, Youxi Tang, Dongsheng Sang, Shaoqian Li
{"title":"Impact of timing error on BER performance of TDD pre-equalized OFDM systems","authors":"Dawei Liu, Youxi Tang, Dongsheng Sang, Shaoqian Li","doi":"10.1109/PIMRC.2004.1370963","DOIUrl":"https://doi.org/10.1109/PIMRC.2004.1370963","url":null,"abstract":"The TDD pre-equalized OFDM systems have a mighty significant advantage of saving system resource by omitting the pilot symbols. Along with that, there is a limitation that the timing error can not be revised in the absence of pilot symbols. In this paper we investigate the impact of timing error on the receiver's BER performance of TDD pre-equalized OFDM systems. We obtain the analytic BPSK BER expressions of ideally and nonideally pre-equalized OFDM systems in multipath Rayleigh fading environment. The corresponding simulations verify the analytic expressions. Compared with the theoretical system performance bound, the performance of ideal and nonideal pre-equalization entail loss of 1db and 3db respectively when the normalized timing error is 1/8. When it is 1/4, both of the two systems' performances degrade severely. At the same time, the gap between them diminishes. In that case, timing error becomes dominant among those elements which would affect system performance.","PeriodicalId":161972,"journal":{"name":"IEEE International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121713503","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}
引用次数: 9
On the performance of a novel multi-hop packet relaying ad hoc cellular system 一种新型多跳分组中继自组织蜂窝系统的性能研究
IEEE International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 1900-01-01 DOI: 10.1109/PIMRC.2004.1370950
Jie Yang, Zhaoyang Zhang, Zhengyuan Tang
{"title":"On the performance of a novel multi-hop packet relaying ad hoc cellular system","authors":"Jie Yang, Zhaoyang Zhang, Zhengyuan Tang","doi":"10.1109/PIMRC.2004.1370950","DOIUrl":"https://doi.org/10.1109/PIMRC.2004.1370950","url":null,"abstract":"A novel architecture for connectionless packet-based communication in wireless mobile cellular system is studied. A certain number of data relaying stations (DRS), which can relay packets from one cell to another in a manner similar to the ad-hoc multi-hop relaying mechanism, are placed in the cellular system to balance traffic load between neighboring cells. The placement of DRS is carefully studied to provide a full relaying coverage of the cell area with the minimum number of DRS. According to a distributed delay-sensitive relaying control strategy, mobile stations (MS) can locally decide whether to divert their traffic to neighboring cells without any central control. Simulation results demonstrate that the proposed method can significantly improve the system throughput and resource utilization and reduce the average packet delay.","PeriodicalId":161972,"journal":{"name":"IEEE International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"317 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115833316","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}
引用次数: 2
Investigating the effects of imperfect DOA estimation on performance of adaptive beamforming antennas in LCR TD-CDMA 研究了不完全DOA估计对LCR TD-CDMA自适应波束形成天线性能的影响
IEEE International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 1900-01-01 DOI: 10.1109/PIMRC.2008.4699453
Bo Chen, Yongyu Chang, Dacheng Yang, Guang Yang
{"title":"Investigating the effects of imperfect DOA estimation on performance of adaptive beamforming antennas in LCR TD-CDMA","authors":"Bo Chen, Yongyu Chang, Dacheng Yang, Guang Yang","doi":"10.1109/PIMRC.2008.4699453","DOIUrl":"https://doi.org/10.1109/PIMRC.2008.4699453","url":null,"abstract":"Adaptive beamforming antenna (ABA) is widely recognized as a primary technique which can remarkably enhance the performances of wireless networks in terms of capacity and throughput by spatial filtering. However, in practical networks, beamforming weights of ABA can be deteriorated due to direction of arrival (DOA) estimation errors. In this paper, the performances of ABA in existing DOA estimation errors scenarios are investigated from system capacity and throughput aspects. Noticeable performance degradations are observed due to the DOA estimation errors and the extent of effect on performance is presented.","PeriodicalId":161972,"journal":{"name":"IEEE International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133077548","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}
引用次数: 1
Information-theoretic aspects of spread ALOHA 传播ALOHA的信息论方面
IEEE International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 1900-01-01 DOI: 10.1109/PIMRC.1995.477376
Felix Tarköy
{"title":"Information-theoretic aspects of spread ALOHA","authors":"Felix Tarköy","doi":"10.1109/PIMRC.1995.477376","DOIUrl":"https://doi.org/10.1109/PIMRC.1995.477376","url":null,"abstract":"Slotted ALOHA is often analysed in terms of throughput and delay. These quantities do not take into account the restrictions on information transmission imposed by noise. The (potential) information per symbol interval of slotted ALOHA is calculated for an AWGN channel. It is further shown that the use of orthogonal spreading sequences does not affect system performance if bandwidth is kept constant. Finally, an example demonstrates that the use of non-orthogonal spreading sequences, which enables a certain capture effect, actually decreases the information per symbol interval.","PeriodicalId":161972,"journal":{"name":"IEEE International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115572012","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}
引用次数: 9
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