IEEE Global Telecommunications Conference, 2004. GLOBECOM '04.最新文献

SSTP: an 802.1s extension to support scalable spanning tree for mobile metropolitan area network SSTP: 802.1s扩展，支持移动城域网的可扩展生成树

IEEE Global Telecommunications Conference, 2004. GLOBECOM '04. Pub Date : 2004-12-01 DOI: 10.1109/GLOCOM.2004.1378233

K. Ishizu, K. Okamura, M. Kuroda, K. Kamura

引用次数: 9

Performance analysis and code design of low-density parity-check (LDPC) coded space-time transmit diversity (STTD) system 低密度奇偶校验(LDPC)编码空时发射分集(STTD)系统的性能分析与编码设计

IEEE Global Telecommunications Conference, 2004. GLOBECOM '04. Pub Date : 2004-12-01 DOI: 10.1109/GLOCOM.2004.1378926

A. Ohhashi, T. Ohtsuki

引用次数: 15

Grassmannian beamforming on correlated MIMO channels 相关MIMO信道上的格拉斯曼波束形成

IEEE Global Telecommunications Conference, 2004. GLOBECOM '04. Pub Date : 2004-12-01 DOI: 10.1109/GLOCOM.2004.1377922

D. Love, R. Heath

引用次数: 77

Optical wireless MIMO communications (OMIMO) 光无线MIMO通信(OMIMO)

IEEE Global Telecommunications Conference, 2004. GLOBECOM '04. Pub Date : 2004-12-01 DOI: 10.1109/GLOCOM.2004.1378096

Daisuke Takase, T. Ohtsuki

引用次数: 49

Low-complexity rake reception and equalization for MBOK DS-UWB systems MBOK DS-UWB系统的低复杂度rake接收和均衡

IEEE Global Telecommunications Conference, 2004. GLOBECOM '04. Pub Date : 2004-12-01 DOI: 10.1109/GLOCOM.2004.1378156

K. Takizawa, R. Kohno

引用次数: 27

SAGE algorithm for channel estimation and data detection with tracking the channel variation in MIMO system 基于SAGE算法的MIMO系统信道估计与数据检测

IEEE Global Telecommunications Conference, 2004. GLOBECOM '04. Pub Date : 2004-12-01 DOI: 10.1109/GLOCOM.2004.1379050

Takao Someya, T. Ohtsuki

引用次数: 8

Performance evaluation of UWB-IR and DS-UWB with MMSE-frequency domain equalization (FDE) 基于mmse频域均衡(FDE)的UWB-IR和DS-UWB性能评价

IEEE Global Telecommunications Conference, 2004. GLOBECOM '04. Pub Date : 2004-12-01 DOI: 10.1109/GLOCOM.2004.1378921

Y. Ishiyama, T. Ohtsuki

{"title":"Performance evaluation of UWB-IR and DS-UWB with MMSE-frequency domain equalization (FDE)","authors":"Y. Ishiyama, T. Ohtsuki","doi":"10.1109/GLOCOM.2004.1378921","DOIUrl":"https://doi.org/10.1109/GLOCOM.2004.1378921","url":null,"abstract":"Ultra wideband (UWB) has recently attracted much attention as an indoor short range high-speed wireless communication. Of all UWB systems, ultra wideband-impulse radio (UWB-IR) and direct sequence-ultra wideband (DS-UWB) use extreme short pulses and have the advantage of the extremely high path resolutions. The RAKE receiver is known as a technique that can effectively combine paths with different delays, obtain the path diversity gain, and improve the transmission characteristics. However, multipath is spread over dozens of symbols in the case of ultra high-speed communications of several hundreds Mbps, which causes the strong frequency selective channel. As a result, the transmission performance degrades. Meanwhile, the single-carrier (SC) transmission with frequency domain equalization (FDE) has also recently attracted much attention (Falconer et al. (2002)). It is reported that the SC with FDE has few problems of peak to average power ratio (PAPR) and also obtains an excellent performance as well as orthogonal frequency division multiplexing (OFDM) even in the strong frequency selective channel where multipath is spread over dozens of symbols. In this paper, we propose UWB-IR and DS-UWB with minimum mean square error (MMSE)-FDE. We evaluate the bit error rate (BER) or UWB-IR and DS-UWB with MMSE-FDE and compare it to that of UWB-IR and DS-UWB with maximal ratio combining (MRC)-RAKE and MMSE-RAKE. In consequence, we show that UWB-IR with MMSE-FDE can achieve the better BER than UWB-IR with MRC-RAKE and MMSE-RAKE. We also show that DS-UWB with MMSE-FDE has a better BER than DS-UWB with MRC-RAKE and MMSE-RAKE, particularly when M is large.","PeriodicalId":162046,"journal":{"name":"IEEE Global Telecommunications Conference, 2004. GLOBECOM '04.","volume":"207 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123025789","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: 53

Delay-limited throughput maximization for fading channels using rate and power control 使用速率和功率控制的衰落信道延迟限制吞吐量最大化

IEEE Global Telecommunications Conference, 2004. GLOBECOM '04. Pub Date : 2004-12-01 DOI: 10.1109/GLOCOM.2004.1379009

N. Ahmed, Mohammad Ali Khojestapour, Richard Baraniuk

{"title":"Delay-limited throughput maximization for fading channels using rate and power control","authors":"N. Ahmed, Mohammad Ali Khojestapour, Richard Baraniuk","doi":"10.1109/GLOCOM.2004.1379009","DOIUrl":"https://doi.org/10.1109/GLOCOM.2004.1379009","url":null,"abstract":"The fading channels seen in many wireless systems provide a particularly hostile environment for reliable communication. Current metrics for evaluating the performance limits of fading channels have shortcomings. Ergodic capacity, representing the ultimate error-free communications limit, only applies to systems with infinite coding delay. Practical systems are delay-limited and must use finite-length codes. For delay-limited systems /spl epsi/-capacity and delay-limited capacity are typically used to quantify the communications performance. However, /spl epsi/-capacity is not an estimate of error-free performance while delay-limited capacity tends to be an overly conservative measure. We model practical systems as a single server queue and quantify the communications performance as the average throughput through the queue. Throughput is maximized by optimally selecting the transmission rate and power control strategy. Using this approach we arrive at striking conclusions. First, we show that a throughput very close to ergodic capacity can be achieved with a small coding delay. Second, the optimal transmission rate for some systems can be higher than the ergodic capacity of the channel. Third, we demonstrate the notion that power adaptation does not improve communication performance does not hold for delay-limited systems.","PeriodicalId":162046,"journal":{"name":"IEEE Global Telecommunications Conference, 2004. GLOBECOM '04.","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124800982","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: 18

Optical wireless sensor network system using corner cube retroreflectors (CCRs) 基于角立方反射器的无线传感网络系统

IEEE Global Telecommunications Conference, 2004. GLOBECOM '04. Pub Date : 2004-12-01 DOI: 10.1109/GLOCOM.2004.1378115

S. Teramoto, T. Ohtsuki

{"title":"Optical wireless sensor network system using corner cube retroreflectors (CCRs)","authors":"S. Teramoto, T. Ohtsuki","doi":"10.1109/GLOCOM.2004.1378115","DOIUrl":"https://doi.org/10.1109/GLOCOM.2004.1378115","url":null,"abstract":"We analyze the optical wireless sensor network system using corner cube retroreflectors (CCRs). A CCR consists of three concave mirrors. When a light beam enters the CCR, it bounces off each of the three mirrors and is reflected back parallel to the direction it entered. A CCR sends information towards a base station modulating the reflected beam by operation of vibrating CCR or shielding of light pass, and one can transmit an on-off-keying (OOK) modulated optical signal. In optical communications, a CCR is attractive, because of its small size, ease of operation, and low power consumption. In this analysis, we evaluate two decisions at the fusion center, the collective decision and the majority decision. The collective decision is that all the information detected by the sensors is collected by one photodetector (PD), and then the hard decision is done. The majority decision is that each information detected by the sensor is respectively received by each PD, the hard detection is done for each PD output, and decided by majority. We show that the bit error rates (BERs) of the systems are improved as the number of sensors increases. We also show that when the transmitted optical power is adequately large, the BERs of the systems depend on the accuracy of the sensors. We confirm that the BERs of the systems using the collective decision are better than those of the systems using the majority decision.","PeriodicalId":162046,"journal":{"name":"IEEE Global Telecommunications Conference, 2004. GLOBECOM '04.","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129230096","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: 30

A new bit-interleaved coded modulation scheme using shaping coding 一种采用整形编码的位交织编码调制方案

IEEE Global Telecommunications Conference, 2004. GLOBECOM '04. Pub Date : 2004-11-29 DOI: 10.1109/GLOCOM.2004.1377901

S. L. Goff, B. Sharif, S. Jimaa

引用次数: 8