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12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)最新文献

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A theory of multiple-input/multiple-output (MIMO) system for mobile radio communications 移动无线电通信中的多输入多输出(MIMO)系统原理
12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598) Pub Date : 2001-09-30 DOI: 10.1109/PIMRC.2001.965409
C. Gao, E. Sousa
{"title":"A theory of multiple-input/multiple-output (MIMO) system for mobile radio communications","authors":"C. Gao, E. Sousa","doi":"10.1109/PIMRC.2001.965409","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965409","url":null,"abstract":"Using n-element arrays for transmission and reception in a radio communication link is one of the recent focuses in wireless communication research. Most of the studies are based on the assumption that the transmitter is in complete ignorance of the channel information. Radio modem designs are often carried out on the basis of average channel characteristics. However, radio communications are seldom simplex and channel information could be readily fed back to the transmitter. We present a transmission and reception theory for such an ideal situation that both the transmitter and receiver have the knowledge of the channel instantaneously and precisely, in the hope that an alternative to the complete statistical treatment can be developed.","PeriodicalId":318292,"journal":{"name":"12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)","volume":"3 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":"131836780","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
High-performance, high-capacity MC-CDMA via carrier interferometry 高性能，高容量MC-CDMA载波干涉测量
12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598) Pub Date : 2001-09-30 DOI: 10.1109/PIMRC.2001.965312
Zhiqiang Wu, B. Natarajan, C. Nassar, S. Shattil
{"title":"High-performance, high-capacity MC-CDMA via carrier interferometry","authors":"Zhiqiang Wu, B. Natarajan, C. Nassar, S. Shattil","doi":"10.1109/PIMRC.2001.965312","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965312","url":null,"abstract":"This paper proposes a novel scheme which doubles capacity in MC-CDMA systems without any cost in bandwidth and with negligible cost in performance. Specifically: (1) complex spreading codes are used instead of conventional real value spreading codes; and (2) two groups of orthogonal complex spreading codes are used simultaneously, where minimum cross-correlation exists between the two groups. Simulations performed over Rayleigh fading channels using these novel codes demonstrate that the proposed scheme enables gain of 100% in terms of MC-CDMA capacity with negligible performance losses.","PeriodicalId":318292,"journal":{"name":"12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)","volume":"98 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":"134553017","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: 16
Performance of concatenated channel coding schemes with block repetition for a wireless indoor high bit rate flexible modem 室内无线高比特率灵活调制解调器的分组重复级联信道编码方案的性能
12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598) Pub Date : 2001-09-30 DOI: 10.1109/PIMRC.2001.965299
R. Sanz, L. Muñoz, P. Mähönen
{"title":"Performance of concatenated channel coding schemes with block repetition for a wireless indoor high bit rate flexible modem","authors":"R. Sanz, L. Muñoz, P. Mähönen","doi":"10.1109/PIMRC.2001.965299","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965299","url":null,"abstract":"The Wind-Flex project has developed a wireless indoor high bit rate OFDM modem, operating at 17 GHz. This modem is a packet-radio based system with a highly dynamic bit-rate range between 64 Kbit/s and 100 Mbit/s. Simulations for implementation have been done to evaluate the performance of the Wind-Flex modem using a concatenated coding scheme in combination with a TDMA-based block repetition mechanism. A simple ARQ-like delay reduction procedure is also presented. We show that TDMA-based repetition can significantly enhance the performance of the packet-oriented concatenated codec by trading off data rate for robustness. This does not lead to increased complexity in the modem implementation.","PeriodicalId":318292,"journal":{"name":"12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)","volume":"133 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":"133604900","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
Optimum multiuser detection for MC-CDMA systems using sphere decoding 基于球面解码的MC-CDMA系统最佳多用户检测
12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598) Pub Date : 2001-09-30 DOI: 10.1109/PIMRC.2001.965383
L. Brunel
{"title":"Optimum multiuser detection for MC-CDMA systems using sphere decoding","authors":"L. Brunel","doi":"10.1109/PIMRC.2001.965383","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965383","url":null,"abstract":"The maximum likelihood joint detection of all users in a multi-carrier code division multiple access (MC-CDMA) system has a prohibitive complexity, growing exponentially with the number of users, when it is performed using an exhaustive search. In this paper, a novel ML multiuser detection algorithm is proposed, whose complexity is a polynomial function of the number of users and is independent of the modulation size. The MC-CDMA system is modelled using a sphere packing lattice representation and an efficient lattice decoder, called the sphere decoder, is applied to jointly detect all users. Simulation results are proposed up to 64 users transmitting 16-QAM symbols.","PeriodicalId":318292,"journal":{"name":"12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)","volume":"153 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":"132729401","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: 17
SS-CDMA flexible wireless network: intracell uplink without transmission power control SS-CDMA灵活无线网络:小区内上行，无需传输功率控制
12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598) Pub Date : 2001-09-30 DOI: 10.1109/PIMRC.2001.965252
S. Kameda, Kouichi Takahashi, Y. Iizuka, H. Nakase, K. Tsubouchi
{"title":"SS-CDMA flexible wireless network: intracell uplink without transmission power control","authors":"S. Kameda, Kouichi Takahashi, Y. Iizuka, H. Nakase, K. Tsubouchi","doi":"10.1109/PIMRC.2001.965252","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965252","url":null,"abstract":"We have proposed an intracell uplink of a spread-spectrum code-division multiple-access (SS-CDMA) flexible wireless network based on approximately synchronized (AS) CDMA. Since the AS-CDMA has no co-channel interference, complicated transmission power control (TPC) is not required. We have evaluated bit error rate (BER) performances in cases of varying carrier frequency offset and desired-to-undesired signal ratio (DUR). Under 2-user environment on Rayleigh fading channel with 1-path profile, at the undesired signal carrier frequency offset of 0.3 ppm and the BER of 10/sup -3/, the DUR is found to be -32 dB. Thus, using the AS-CDMA with a 2-step open-loop TPC technique, the intracell uplink is available. Furthermore, the intracell uplink without TPC technique is expected using the AS-CDMA with the received signal frequency stabilized synthesizer.","PeriodicalId":318292,"journal":{"name":"12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)","volume":"12 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":"122152211","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
Analysis of a joint space-time DOA/FOA estimator using MUSIC 基于MUSIC的联合时空DOA/FOA估计器分析
12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598) Pub Date : 2001-09-30 DOI: 10.1109/PIMRC.2001.965447
Shu Wang, J. Caffery, Xinli Zhou
{"title":"Analysis of a joint space-time DOA/FOA estimator using MUSIC","authors":"Shu Wang, J. Caffery, Xinli Zhou","doi":"10.1109/PIMRC.2001.965447","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965447","url":null,"abstract":"We examine a high-resolution signal estimation algorithm which can simultaneously estimate the spatial direction /spl theta//sub i/ and temporal frequency f/sub i/ of each source by extending the MUSIC algorithm to use space-time information obtained from one spatial sub-array and one temporal sub-array. Since the dimension of the autocorrelation matrix is flexible (due to the use of the time dimension) and can be chosen larger than the number of sources regardless of the number of array elements, the algorithm can perform joint estimation with only two array elements. Mathematical analysis is used to determine the complexity and compute the Cramer-Rao lower bound (CRLB). Computer simulation results are presented to demonstrate the algorithm's performance.","PeriodicalId":318292,"journal":{"name":"12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)","volume":"108 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":"124811833","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: 14
In-network evaluation of body-carried mobile terminal performance 体载移动终端性能的网内评价
12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598) Pub Date : 2001-09-30 DOI: 10.1109/PIMRC.2001.965502
J. Nielsen, G. Pedersen
{"title":"In-network evaluation of body-carried mobile terminal performance","authors":"J. Nielsen, G. Pedersen","doi":"10.1109/PIMRC.2001.965502","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965502","url":null,"abstract":"This paper investigates the body loss when a mobile handset is carried on the user's body, e.g., when a hands-free kit is used and the handset is carried in a pocket. A number of measurements were carried out in a live GSM network, using logging of data from the Abis interface of the network. Four commercially available handsets were tested and 18 test users were involved. In addition a full body phantom mimicking the user's body was tested.","PeriodicalId":318292,"journal":{"name":"12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)","volume":"9 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":"128826099","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: 15
An outage-based fuzzy call admission control for WCDMA systems using multiuser detection 基于多用户检测的WCDMA系统中断模糊呼叫接纳控制
12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598) Pub Date : 2001-09-30 DOI: 10.1109/PIMRC.2001.965422
Yung-Han Chen, Chung-Ju Chang, S. Shen
{"title":"An outage-based fuzzy call admission control for WCDMA systems using multiuser detection","authors":"Yung-Han Chen, Chung-Ju Chang, S. Shen","doi":"10.1109/PIMRC.2001.965422","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965422","url":null,"abstract":"Multiuser detection (MUD) can increase the system capacity. Wideband code division multiple access (WCDMA) systems adopt this new technology, but the capacity limitation still exists due to other cells' multiple access interference (MAI). We propose a fuzzy call admission control (FCAC) for WCDMA using MUD with successive interference cancellation (SIC). The FCAC considers both intra-cell and inter-cell MAI, and it is designed to maximize the benefit of MUD. Simulation results show that the FCAC with MUD can provide more accurate management of system resource than FCAC with RAKE receiver and SIR-based CAC with MUD in WCDMA systems.","PeriodicalId":318292,"journal":{"name":"12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)","volume":"14 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":"129141989","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: 3
Adaptive handoff method using location information 使用位置信息的自适应切换方法
12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598) Pub Date : 2001-09-30 DOI: 10.1109/PIMRC.2001.965489
P. Wang, A. Rajendran, M. Wylie-Green
{"title":"Adaptive handoff method using location information","authors":"P. Wang, A. Rajendran, M. Wylie-Green","doi":"10.1109/PIMRC.2001.965489","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965489","url":null,"abstract":"This paper presents an inter-cell (hard) handoff algorithm that calculates adaptive handoff hysteresis values based on mobile location information and cell RF propagation statistics. The analysis is focused on the probability of handoff and the probability of dropped calls in the system. Simulation results show that the probability of unnecessary handoff is reduced using the adaptive handoff algorithm with only a minor increase in the dropped-call probability. This improvement is significant if the propagation signal varies rapidly in the cell.","PeriodicalId":318292,"journal":{"name":"12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)","volume":"1 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":"130139254","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: 7
A new reduced-complexity adaptive PSP-MLSE receiver for GSM/EDGE systems 一种用于GSM/EDGE系统的新型低复杂度自适应PSP-MLSE接收机
12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598) Pub Date : 2001-09-30 DOI: 10.1109/PIMRC.2001.965505
Zhenhong Li, O. Piirainen, A. Mämmelä
{"title":"A new reduced-complexity adaptive PSP-MLSE receiver for GSM/EDGE systems","authors":"Zhenhong Li, O. Piirainen, A. Mämmelä","doi":"10.1109/PIMRC.2001.965505","DOIUrl":"https://doi.org/10.1109/PIMRC.2001.965505","url":null,"abstract":"A new adaptive reduced-complexity MLSE receiver based on per-survivor processing (PSP-MLSE) and a decision feedback equalizer (DFE) for GSM/EDGE system with 8PSK modulation is proposed. The initial channel impulse response (CIR) is estimated by the LS algorithm with a mid-amble and updated by the LMS algorithm during data transmission. The proposed scheme handles the first part of the sampled CIR by the PSP-MLSE and the rest by the DFE for complexity reduction. Instead of the conventional global DFE (decision per sample), the local DFE (decision per state/survivor) is suggested to reduce error propagation. A good tradeoff between performance and complexity, by retaining the PSP-MLSE for good performance and using the local DFE for intersymbol interference cancellation, is obtained. Computer simulations indicate that the PSP-MLSE with the local DFE is clearly superior to that with the global DFE, especially in severe ISI channels.","PeriodicalId":318292,"journal":{"name":"12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598)","volume":"41 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":"129457988","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: 7
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