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2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications最新文献

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Group Transmission in Downlink of Overloaded CDMA Systems 超载CDMA系统下行链路中的群传输
2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2006-12-11 DOI: 10.1109/PIMRC.2006.254326
S. M. Razavizadeh, P. Azmi, V. Vakili
{"title":"Group Transmission in Downlink of Overloaded CDMA Systems","authors":"S. M. Razavizadeh, P. Azmi, V. Vakili","doi":"10.1109/PIMRC.2006.254326","DOIUrl":"https://doi.org/10.1109/PIMRC.2006.254326","url":null,"abstract":"This paper proposes two different transmit precoding schemes for downlink of overloaded CDMA systems i.e. CDMA systems in which the number of users is more than the processing gain of the system. These schemes are based on user grouping technique. In this technique, K users in the system are partitioned into G groups and a unique spreading sequence is assigned to each group. Using multiple antenna in the base station transmitter, we can separate users in each group by their different spatial characteristics. This separation is performed by some linear spatial pre-processing techniques in the transmitter. In addition, to suppress the multiple access interference between users in different groups, we use temporal linear transmit precoding method. Using precoding method in the base station's transmitter makes the mobile receivers very simple and low cost. We present the bit error rate (BER) performance of the proposed schemes in a flat fading channel by computer simulations. It is demonstrated that a considerable improvement in the performance and increasing in the system capacity will be obtained by using the proposed group transmission schemes","PeriodicalId":325797,"journal":{"name":"2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132757772","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
Dual Symbol Rate for Geran Uplink Evolution Geran上行链路演化的双符号速率
2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2006-12-11 DOI: 10.1109/PIMRC.2006.254247
Mikko Säily, J. Hulkkonen, Kari Niemela, O. Piirainen
{"title":"Dual Symbol Rate for Geran Uplink Evolution","authors":"Mikko Säily, J. Hulkkonen, Kari Niemela, O. Piirainen","doi":"10.1109/PIMRC.2006.254247","DOIUrl":"https://doi.org/10.1109/PIMRC.2006.254247","url":null,"abstract":"In this paper the dual symbol rate (DSR) concept is proposed for GERAN networks. DSR doubles the modulation rate and user bit rate per radio time slot. Basic assumption is that the transmit signal of adjacent channels overlap in frequency domain. Interference rejection combining algorithms (IRC) are used to combat the introduced interference. Analysis of theoretical channel capacity suggests that data rates can be improved either by increasing the number of antennas or frequency bandwidth in the used radio links. Simulation results are given to demonstrate possible DSR deployment to the existing networks. Spectral efficiency, coverage and user bit rates are shown to be significantly improved","PeriodicalId":325797,"journal":{"name":"2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133276681","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
Subcarrier Phase Hopping MIMO-OFDM Transmission Employing Enhanced Selected Mapping for PAPR Reduction 采用增强选择映射降低PAPR的子载波跳相MIMO-OFDM传输
2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2006-12-11 DOI: 10.1109/PIMRC.2006.254355
S. Suyama, Naoji Nomura, H. Suzuki, K. Fukawa
{"title":"Subcarrier Phase Hopping MIMO-OFDM Transmission Employing Enhanced Selected Mapping for PAPR Reduction","authors":"S. Suyama, Naoji Nomura, H. Suzuki, K. Fukawa","doi":"10.1109/PIMRC.2006.254355","DOIUrl":"https://doi.org/10.1109/PIMRC.2006.254355","url":null,"abstract":"This paper proposes a MIMO-OFDM transmission scheme that combines the subcarrier phase hopping for space division multiplexing (SPH-SDM) with an enhanced selected mapping (ESLM). SPH-SDM randomizes the subcarrier phases within an OFDM symbol and makes subcarrier components of the received signal uncorrelated in order to improve BER performance of a MIMO-OFDM coded system. The phase patterns are adjusted so that they can not only randomize the subcarrier phase hopping but also reduce the peak-to-average power ratio (PAPR). In contrast to conventional PAPR reduction techniques for OFDM such as the selected mapping (SEM), ESLM employs roughly quantized IFFT processing for selecting the phase pattern in order to reduce the numerical complexity, and modulates the pilot subcarriers so as to inform the receiver of the selected phase pattern. Computer simulation shows that SPH-SDM with ESLM can increase the frequency diversity gain by channel coding, while simultaneously reducing PAPR by a suboptimum phase pattern","PeriodicalId":325797,"journal":{"name":"2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"22 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132119307","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: 11
Dynamic Buffering Control Scheme for Mobile Handoff 移动切换的动态缓冲控制方案
2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2006-12-11 DOI: 10.1109/PIMRC.2006.254222
A. Dutta, E. V. D. Berg, D. Famolari, V. Fajardo, Y. Ohba, K. Taniuchi, T. Kodama, H. Schulzrinne
{"title":"Dynamic Buffering Control Scheme for Mobile Handoff","authors":"A. Dutta, E. V. D. Berg, D. Famolari, V. Fajardo, Y. Ohba, K. Taniuchi, T. Kodama, H. Schulzrinne","doi":"10.1109/PIMRC.2006.254222","DOIUrl":"https://doi.org/10.1109/PIMRC.2006.254222","url":null,"abstract":"In a mobile environment, as a mobile node moves from one point of attachment to another during an ongoing application session it is subjected to packet loss due to network and link layer transition. Such packet loss affects the quality of ongoing communication session such as interactive VoIP traffic and streaming media. We provide a solution to this scenario by buffering packets for the mobile node at an access router or network node near the edge of the network where mobile may be moving away from or moving towards. The buffered packets are then forwarded to the mobile node once the handoff process completes. The buffering scheme is used in conjunction with existing mobility protocols, access protocols or as an independent network or link layer mechanism. Ability to control the buffer dynamically provides a reasonable trade-off between delay and packet loss which is within the threshold limit for real-time communication. The overview and mechanisms of such schemes are described and comparisons on existing buffering schemes are also provided","PeriodicalId":325797,"journal":{"name":"2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134309559","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
Wideband Directional Radio Propagation Channel Analysis Inside an Arched Tunnel 拱形隧道内宽带定向无线电传播信道分析
2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2006-12-11 DOI: 10.1109/PIMRC.2006.253953
G. Ching, M. Ghoraishi, N. Lertsirisopon, J. Takada, T. Imai, I. Sameda, H. Sakamoto
{"title":"Wideband Directional Radio Propagation Channel Analysis Inside an Arched Tunnel","authors":"G. Ching, M. Ghoraishi, N. Lertsirisopon, J. Takada, T. Imai, I. Sameda, H. Sakamoto","doi":"10.1109/PIMRC.2006.253953","DOIUrl":"https://doi.org/10.1109/PIMRC.2006.253953","url":null,"abstract":"To analyze the radio propagation channel inside a tunnel, a wideband directional measurement campaign was managed inside an arched tunnel which was constructed to be used for a highway. Using a wideband channel sounder equipped with a cylindrical dual polarized array at the receiver (Rx), the spatio-temporal characteristics of the received propagation paths could be estimated by means of a super-resolution estimation algorithm. The dominant scatterers are classified into 5 classes based on the structure of the tunnel as follows: ceiling, light-frames, walls, sidewalk or ground. The power contribution and cross polarization ratio for different Rx positions along the tunnel are compared","PeriodicalId":325797,"journal":{"name":"2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"157 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133398522","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: 6
Joint Adaptation of Code Length and Modulation Formats in OFDM Systems OFDM系统中码长和调制格式的联合自适应
2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2006-12-11 DOI: 10.1109/PIMRC.2006.253957
P. Trifonov, E. Costa, E. Schulz
{"title":"Joint Adaptation of Code Length and Modulation Formats in OFDM Systems","authors":"P. Trifonov, E. Costa, E. Schulz","doi":"10.1109/PIMRC.2006.253957","DOIUrl":"https://doi.org/10.1109/PIMRC.2006.253957","url":null,"abstract":"In order to reduce the signaling overhead in adaptive OFDM transmission systems being designed for B3G and 4G wireless communications, the basic resource unit, referred to as chunk, comprises a number of adjacent sub-carriers and OFDM symbol periods. A consequent open issue is the mapping of long codewords onto limited size chunks, especially when link adaptation per chunk is carried out. This paper proposes a new method for joint coding and modulation. A data packet, independently of its length, is encoded without any segmentation into a single codeword spanning different chunks employing different signal constellations. The parameters of the underlying error correction code are chosen independently of the signal constellation and no puncturing is required. Moreover, a joint adaptation of the code length and the modulation format is proposed to optimise the number of chunks allocated for transmission","PeriodicalId":325797,"journal":{"name":"2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"252 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134093249","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
A Throughput Analysis for Opportunistic Beamforming with Quantized Feedback 基于量化反馈的机会波束形成吞吐量分析
2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2006-12-11 DOI: 10.1109/PIMRC.2006.253978
J. Vicario, R. Bosisio, U. Spagnolini, C. Antón-Haro
{"title":"A Throughput Analysis for Opportunistic Beamforming with Quantized Feedback","authors":"J. Vicario, R. Bosisio, U. Spagnolini, C. Antón-Haro","doi":"10.1109/PIMRC.2006.253978","DOIUrl":"https://doi.org/10.1109/PIMRC.2006.253978","url":null,"abstract":"Opportunistic schemes employing multiple beams have recently attracted significant interest due to the capability to achieve both multiuser diversity and spatial multiplexing gain at limited feedback load. In this paper we explore the effect of the feedback quantization on the performance of these schemes. We derive a closed-form expression of the system throughput with and without feedback quantization. By doing so, we analytically assess the impact of the number of terminals and the restriction in the feedback bandwidth. It is shown that most of the throughput is preserved by using a few quantization bits","PeriodicalId":325797,"journal":{"name":"2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130304710","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: 22
Efficient Lightweight Broadcasting Protocols for Multi-Hop Ad Hoc Networks 多跳自组织网络的高效轻量级广播协议
2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2006-12-11 DOI: 10.1109/PIMRC.2006.254169
Qing Huang, Yong Bai, Lan Chen
{"title":"Efficient Lightweight Broadcasting Protocols for Multi-Hop Ad Hoc Networks","authors":"Qing Huang, Yong Bai, Lan Chen","doi":"10.1109/PIMRC.2006.254169","DOIUrl":"https://doi.org/10.1109/PIMRC.2006.254169","url":null,"abstract":"Broadcasting is an indispensable operation for multi-hop mobile ad hoc network (MANET) to provide control or routing functionalities. In MANET, since a packet relayed by any node can reach all its neighbour nodes, broadcasting by flooding is inefficient and results in many redundant relays. In this paper, we analyze the deficiencies of some previous broadcasting protocols and propose two enhanced lightweight protocols, namely hop count-aided broadcasting (HCAB) and self-adaptive probability broadcasting (SAPB). The proposed protocols can reduce broadcasting redundancy significantly and guarantee high broadcasting coverage as well. More importantly, the proposed protocols are lightweight, which means each node makes relay decision without any knowledge of its neighbours. Thus, the proposed protocols have low overhead and are attractive to capacity limited mobile devices. Simulation results show that the proposed protocols eliminate unnecessary relay efficiently and outperform the existing lightweight broadcasting protocols","PeriodicalId":325797,"journal":{"name":"2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"59 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130370657","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: 34
Performance Analysis of Diversity Techniques for Multihop Cooperative Networks with Adaptive Transmission 自适应传输多跳合作网络分集技术性能分析
2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2006-12-11 DOI: 10.1109/PIMRC.2006.254475
Bao Thi Ngoc Pham, H. Murata, K. Araki
{"title":"Performance Analysis of Diversity Techniques for Multihop Cooperative Networks with Adaptive Transmission","authors":"Bao Thi Ngoc Pham, H. Murata, K. Araki","doi":"10.1109/PIMRC.2006.254475","DOIUrl":"https://doi.org/10.1109/PIMRC.2006.254475","url":null,"abstract":"Wireless multihop communications with the cooperation of multiple relay terminals at each hop gives diversity effect and shows a significant frame error rate improvement than that without cooperation. To improve the spectral efficiency of this communication networks, adaptive modulation method is applied in this paper. The performance of adaptive transmission schemes combined with diversity techniques in multihop cooperative networks is analyzed. Numerical results from the analysis show that the throughput performance of adaptive transmission combined with a selection diversity technique is superior to that of the STBC diversity technique","PeriodicalId":325797,"journal":{"name":"2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115040986","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
Experimental Analysis of the Ultra Wideband Propagation Channel Over the 3.1 GHz - 10.6 GHz Frequency Band 3.1 GHz ~ 10.6 GHz频段超宽带传播信道的实验分析
2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2006-12-11 DOI: 10.1109/PIMRC.2006.254387
P. Pagani, P. Pajusco
{"title":"Experimental Analysis of the Ultra Wideband Propagation Channel Over the 3.1 GHz - 10.6 GHz Frequency Band","authors":"P. Pagani, P. Pajusco","doi":"10.1109/PIMRC.2006.254387","DOIUrl":"https://doi.org/10.1109/PIMRC.2006.254387","url":null,"abstract":"In order to design communication systems fully exploiting the FCC-defined ultra wideband (UWB) spectrum, an accurate knowledge of the propagation mechanisms is necessary. This paper presents a comprehensive UWB channel measurement campaign designed in the office indoor environment to cover the 3.1 GHz - 10.6 GHz frequency band. From an extensive set of recorded channel impulse responses (CIRs), statistical analyses permitted to extract the main UWB radio channel characteristics, such as the UWB path loss, delay spread and cluster and ray arrival rates. In particular, an alternative to the classical Saleh and Valenzuela approach is proposed for the description of UWB power delay profiles (PDPs). Our experimental set of collected parameters may be used to build a realistic model for the UWB radio channel","PeriodicalId":325797,"journal":{"name":"2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114568065","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
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