The 57th IEEE Semiannual Vehicular Technology Conference, 2003. VTC 2003-Spring.最新文献_第5页

Effect of physical layer bandwidth variation on TCP performance in cdma2000 cdma2000中物理层带宽变化对TCP性能的影响

The 57th IEEE Semiannual Vehicular Technology Conference, 2003. VTC 2003-Spring. Pub Date : 2003-04-22 DOI: 10.1109/VETECS.2003.1207558

E. Chaponniere, S. Kandukuri, W. Hamdy

引用次数: 13

Parallel interference cancellation receiver performance in the presence of TDMA interference 有时分多址干扰时并行干扰消除接收机的性能

The 57th IEEE Semiannual Vehicular Technology Conference, 2003. VTC 2003-Spring. Pub Date : 2003-04-22 DOI: 10.1109/VETECS.2003.1207153

J. Nuutinen, K. Horneman, K. Pajukoski

引用次数: 0

A novel blind adaptive equalization in time-varying channels with ISI 一种具有ISI的时变信道盲自适应均衡方法

The 57th IEEE Semiannual Vehicular Technology Conference, 2003. VTC 2003-Spring. Pub Date : 2003-04-22 DOI: 10.1109/VETECS.2003.1207146

M. Oh, Dong-Jo Park, Yeong-Hyeon Kwon

引用次数: 0

Maximum diversity detection for layered space-time codes 分层空时码的最大分集检测

The 57th IEEE Semiannual Vehicular Technology Conference, 2003. VTC 2003-Spring. Pub Date : 2003-04-22 DOI: 10.1109/VETECS.2003.1207742

A. Sezgin, Eduard Axel Jorswieck, V. Jungnickel

引用次数: 10

Outer loop power control using channel-adaptive processing for 3G WCDMA 基于信道自适应处理的3G WCDMA外环功率控制

The 57th IEEE Semiannual Vehicular Technology Conference, 2003. VTC 2003-Spring. Pub Date : 2003-04-22 DOI: 10.1109/VETECS.2003.1207589

Chang-Soo Koo, Sung-Hyuk Shin, R. Difazio, D. Grieco, A. Zeira

{"title":"Outer loop power control using channel-adaptive processing for 3G WCDMA","authors":"Chang-Soo Koo, Sung-Hyuk Shin, R. Difazio, D. Grieco, A. Zeira","doi":"10.1109/VETECS.2003.1207589","DOIUrl":"https://doi.org/10.1109/VETECS.2003.1207589","url":null,"abstract":"In power control systems for wide-band code division multiple-access (WCDMA), the outer loop power control (OLPC) algorithm initially sets a target signal-to-interference ratio (SIR) based on the required target block error rate (BLER), assuming a particular channel condition. A mismatch between the BLER and the target SIR usually results since the actual and assumed channel conditions are rarely the same. This mismatch tends to be especially large at very low BLERs. The OLPC depends on cyclic redundancy checks (CRCs) and often takes a long time to converge to the required target SIR for low target BLERs. In this paper, a channel-adaptive algorithm is presented that controls the target SIR for downlink transmission in WCDMA TDD. The proposed algorithm characterizes the multipath channel profile using predefined multipath channel patterns and compensates for the channel/mapping errors. Link level simulations are conducted in various channel conditions defined by 3GPP and the ITU. The comparison in performance between the channel-adaptive algorithm and the generic \"jump algorithm\" is illustrated and conclusions are drawn.","PeriodicalId":272763,"journal":{"name":"The 57th IEEE Semiannual Vehicular Technology Conference, 2003. VTC 2003-Spring.","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131972969","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

W-CDMA downlink performance degradation due to multipath interference and channel estimation errors 多径干扰和信道估计误差导致的W-CDMA下行链路性能下降

The 57th IEEE Semiannual Vehicular Technology Conference, 2003. VTC 2003-Spring. Pub Date : 2003-04-22 DOI: 10.1109/VETECS.2003.1207806

Y. Socratous, M. Dohler, H. Aghvami

{"title":"W-CDMA downlink performance degradation due to multipath interference and channel estimation errors","authors":"Y. Socratous, M. Dohler, H. Aghvami","doi":"10.1109/VETECS.2003.1207806","DOIUrl":"https://doi.org/10.1109/VETECS.2003.1207806","url":null,"abstract":"The aim of this paper is to quantify the performance of a W-CDMA system in dependency of a giver power delay profile (PDP) and channel estimation errors. The analysis extends the previously published work by Adachi [F. Adachi, Nov. 1997], which assumes ideal channel estimation and multipath tracking. For the analytical expressions a particular channel estimation technique was taken into account and a practical pilot symbol assisted technique was used to derive the channel estimation error. By combining both, the performance degradation due to multiple access interference (MAI) and due to channel estimation errors, an easy to use conditional SINR is derived. Assuming BPSK data modulation for simplicity, the downlink performance in terms of the average BER-vs.-SINR was evaluated by means of Monte Carlo simulation for different PDPs. It could be shown that the performance severely depends on the power distribution of the multipath components and the available number of pilot symbols, which determines the reliability of the estimated channel necessary to perform coherent demodulation.","PeriodicalId":272763,"journal":{"name":"The 57th IEEE Semiannual Vehicular Technology Conference, 2003. VTC 2003-Spring.","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132054644","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

Sequence adaptation for cellular systems 细胞系统的序列适应

The 57th IEEE Semiannual Vehicular Technology Conference, 2003. VTC 2003-Spring. Pub Date : 2003-04-22 DOI: 10.1109/VETECS.2003.1207189

K. Leung, T. Lok, C. Sung

引用次数: 4

Average outage duration of multihop communication systems with regenerative relays 带再生中继的多跳通信系统的平均中断时间

The 57th IEEE Semiannual Vehicular Technology Conference, 2003. VTC 2003-Spring. Pub Date : 2003-04-22 DOI: 10.1109/VETECS.2003.1207524

Lin Yang, M. Hasna, Mohamed-Slim Alouini

引用次数: 23

Joint connection level, packet level and link layer resource allocation in mobile cellular networks with QoS constraints 具有QoS约束的移动蜂窝网络中的联合连接级、分组级和链路层资源分配

The 57th IEEE Semiannual Vehicular Technology Conference, 2003. VTC 2003-Spring. Pub Date : 2003-04-22 DOI: 10.1109/VETECS.2003.1207766

T. C. Wong, J. Mark, K. C. Chua, Y. Chew

引用次数: 5

An OFDM receiver employing turbo equalization for multipath environments with delay spread greater than the guard interval 一种用于延迟扩展大于保护间隔的多径环境的采用turbo均衡的OFDM接收机

The 57th IEEE Semiannual Vehicular Technology Conference, 2003. VTC 2003-Spring. Pub Date : 2003-04-22 DOI: 10.1109/VETECS.2003.1207619

S. Suyama, H. Suzuki, K. Fukawa

引用次数: 27