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2007 14th IEEE Symposium on Communications and Vehicular Technology in the Benelux最新文献

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Comparison of Single- and Multi-carrier Block Transmissions under the Effect of Nonlinear HPA 非线性HPA作用下单载波和多载波块传输的比较
2007 14th IEEE Symposium on Communications and Vehicular Technology in the Benelux Pub Date : 2007-11-01 DOI: 10.1109/SCVT.2007.4436261
Haibing Yang, P. Smulders, E. Fledderus
{"title":"Comparison of Single- and Multi-carrier Block Transmissions under the Effect of Nonlinear HPA","authors":"Haibing Yang, P. Smulders, E. Fledderus","doi":"10.1109/SCVT.2007.4436261","DOIUrl":"https://doi.org/10.1109/SCVT.2007.4436261","url":null,"abstract":"The influence of nonlinear high power amplifier (HPA) at transmit side on single-and multi-carrier block transmission systems is studied in wireless mutipath environments. We consider the single carrier block transmission with frequency domain equalization (SC-FDE), OFDM and MC-CDMA. The effective signal-to-noise ratio (SNR) and SNR penalty caused by the nonlinearity are derived and analyzed. In addition, bit-error rate performance is simulated and compared for various constellations in different channel conditions. The results show that SC-FDE is a robust solution to the nonlinear effect appeared at transmitter side, compared with OFDM and MC-CDMA. MC-CDMA only achieves similar performance as SC-FDE in case of sufficiently high input power backoff, especially for lower constellations. Moreover, the SNR penalty obtained from simulations for SC-FDE and MC-CDMA has a good agreement with that analytically predicted.","PeriodicalId":224906,"journal":{"name":"2007 14th IEEE Symposium on Communications and Vehicular Technology in the Benelux","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125219282","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: 8
Synchronization-Free Data Detection for UWB Communications UWB通信的无同步数据检测
2007 14th IEEE Symposium on Communications and Vehicular Technology in the Benelux Pub Date : 2007-11-01 DOI: 10.1109/SCVT.2007.4436232
V. Lottici, Z. Tian, G. Leus
{"title":"Synchronization-Free Data Detection for UWB Communications","authors":"V. Lottici, Z. Tian, G. Leus","doi":"10.1109/SCVT.2007.4436232","DOIUrl":"https://doi.org/10.1109/SCVT.2007.4436232","url":null,"abstract":"The dense multipath scattering typical of ultra-wideband (UWB) wireless channels provides very large multipath diversity, but from the other side makes the receiver design a demanding task as far as channel estimation and timing recovery are concerned. The contribution of this paper is to derive a novel receiver structure based on the multiple symbols differential detection (MSDD) framework with particular emphasis on bypassing costly channel estimation and relaxing the stringent requirements imposed on timing recovery. The computational complexity of the proposed detection scheme, that becomes quite impractical as the data block size increases, is then circumvented by resorting to an efficient implementation based on the sphere decoding (SD) algorithm. Simulation results carried out in typical multipath propagation scenarios verify that appealing detection performance is achieved at affordable receiver complexity.","PeriodicalId":224906,"journal":{"name":"2007 14th IEEE Symposium on Communications and Vehicular Technology in the Benelux","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122269580","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
Compensated estimators for characterizing interference in a Rayleigh fading environment 瑞利衰落环境中用于表征干扰的补偿估计器
2007 14th IEEE Symposium on Communications and Vehicular Technology in the Benelux Pub Date : 2007-11-01 DOI: 10.1109/SCVT.2007.4436239
T.M.J. van Berkel, J. Linnartz, Chin Keong Ho
{"title":"Compensated estimators for characterizing interference in a Rayleigh fading environment","authors":"T.M.J. van Berkel, J. Linnartz, Chin Keong Ho","doi":"10.1109/SCVT.2007.4436239","DOIUrl":"https://doi.org/10.1109/SCVT.2007.4436239","url":null,"abstract":"Wireless LANs increasingly experience interference from other users operating in the same frequency band. In this paper, the aim is to develop techniques to learn from the interference environment in order to find the best strategy for radio transmissions. An analytical model is proposed to characterize the radio environment around a particular node. A compensated estimator is derived for the activity of nodes. Simulations show that the proposed estimators are reasonably accurate, particularly for high capture thresholds.","PeriodicalId":224906,"journal":{"name":"2007 14th IEEE Symposium on Communications and Vehicular Technology in the Benelux","volume":"155 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122772719","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
Impact of RF Impairments on the Performance of Multi-carrier and Single-carrier based 60 GHz Transceivers 射频损伤对多载波和单载波60ghz收发器性能的影响
2007 14th IEEE Symposium on Communications and Vehicular Technology in the Benelux Pub Date : 2007-11-01 DOI: 10.1109/SCVT.2007.4436256
U. H. Rizvi, G. Janssen, J. Weber
{"title":"Impact of RF Impairments on the Performance of Multi-carrier and Single-carrier based 60 GHz Transceivers","authors":"U. H. Rizvi, G. Janssen, J. Weber","doi":"10.1109/SCVT.2007.4436256","DOIUrl":"https://doi.org/10.1109/SCVT.2007.4436256","url":null,"abstract":"The 60 GHz band, with a large unlicensed bandwidth, is an excellent choice for short distance high-speed communications. However, radio frequency (RF) circuit limitations at 60 GHz give rise to impairments such as phase noise, in-phase/quadrature-phase (I/Q) imbalance and amplifier nonlinearities. The candidate transmission schemes, in addition to multi-path fading, should therefore be fairly robust against RF circuit imperfections. This paper investigates the performance degradation as a function of various circuit parameters for multi-carrier (MC) and single-carrier (SC) schemes, which can be useful for:( i) performing a system cost and performance tradeoff comparison, (ii) identifying main performance bottle necks for MC and SC based systems.","PeriodicalId":224906,"journal":{"name":"2007 14th IEEE Symposium on Communications and Vehicular Technology in the Benelux","volume":"27 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133453797","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
Clustering Based Scheduling: A New Approach to the Design of Scheduling Algorithms for WDM Star Networks 基于聚类的调度:WDM星型网络调度算法设计的新方法
2007 14th IEEE Symposium on Communications and Vehicular Technology in the Benelux Pub Date : 2007-11-01 DOI: 10.1109/SCVT.2007.4436255
S. Petridou, P. Sarigiannidis, G. Papadimitriou, A. Pomportsis
{"title":"Clustering Based Scheduling: A New Approach to the Design of Scheduling Algorithms for WDM Star Networks","authors":"S. Petridou, P. Sarigiannidis, G. Papadimitriou, A. Pomportsis","doi":"10.1109/SCVT.2007.4436255","DOIUrl":"https://doi.org/10.1109/SCVT.2007.4436255","url":null,"abstract":"Scheduling algorithms in wavelength division multiplexing (WDM) single hope networks aim at producing an effective schedule in order to improve the networks' performance. Up to now, popular approaches schedule network traffic based on nodes' requests which are considered in a sequential service order. This paper presents a novel packet scheduling scheme for WDM star networks based on clustering techniques. Our clustering based scheduling algorithm (CBSA) organizes the nodes of a network into groups (i.e. clusters) according to the number of their requests per channel and then it defines their transmission priority beginning from the nodes belonging to the cluster with greater demands and ending to the nodes of cluster with fewer requests. The simulation results have shown that the proposed approach improves network performance since it results in higher network throughput keeping mean packet delay at low levels in comparison with conventional scheduling algorithms.","PeriodicalId":224906,"journal":{"name":"2007 14th IEEE Symposium on Communications and Vehicular Technology in the Benelux","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129301146","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: 8
Performance Analysis of IEEE 802.11 DCF in non-Saturated Single-hop Wireless Local Area Networks IEEE 802.11 DCF在非饱和单跳无线局域网中的性能分析
2007 14th IEEE Symposium on Communications and Vehicular Technology in the Benelux Pub Date : 2007-11-01 DOI: 10.1109/SCVT.2007.4436229
K. Ghaboosi, Matti Latva-aho, Yang Xiao
{"title":"Performance Analysis of IEEE 802.11 DCF in non-Saturated Single-hop Wireless Local Area Networks","authors":"K. Ghaboosi, Matti Latva-aho, Yang Xiao","doi":"10.1109/SCVT.2007.4436229","DOIUrl":"https://doi.org/10.1109/SCVT.2007.4436229","url":null,"abstract":"Many performance evaluations for distributed coordination function (DCF) for IEEE 802.11 Wireless LANs have been previously reported in the literature; most studies based on are saturation analysis, and a few models under a finite load condition adopt an M/G/l queuing system. However, using M/G/l queuing only considers the first moment of frame service time to derive the probability of transmission queue being vacant. In this paper, we model the DCF using parallel space-time Markov chain (PSTMC), in which, frame arrivals are tracked by monitoring the transmission queue during transitions between successive states of the space-time Markov chain. The proposed framework provides the possibility of modeling the contention phase, backoff and post-backoff procedures, and the transmission queue status. The proposed framework is validated by the simulation results.","PeriodicalId":224906,"journal":{"name":"2007 14th IEEE Symposium on Communications and Vehicular Technology in the Benelux","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130563523","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: 4
Matched Subspace Based Correction of Large Errors in UWB Localization 基于匹配子空间的超宽带定位大误差校正
2007 14th IEEE Symposium on Communications and Vehicular Technology in the Benelux Pub Date : 2007-11-01 DOI: 10.1109/SCVT.2007.4436231
S. Korkmaz, A. van der Veen
{"title":"Matched Subspace Based Correction of Large Errors in UWB Localization","authors":"S. Korkmaz, A. van der Veen","doi":"10.1109/SCVT.2007.4436231","DOIUrl":"https://doi.org/10.1109/SCVT.2007.4436231","url":null,"abstract":"Localization using Ultra Wide Band (UWB) signals can show large errors. Due to Non-Line-of-Sight (NLOS) propagation and low signal to nosie ratio (SNR), it is possible to expect that the first arriving path and the strongest path are not equal to each other. This problem can be modeled as a multihypothesis problem. We base our decision on matched subspace detectors. The case where we deal both with Time of Arrivals (TOA) and Angle of Arrivals (AOA) is also studied.","PeriodicalId":224906,"journal":{"name":"2007 14th IEEE Symposium on Communications and Vehicular Technology in the Benelux","volume":"126 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117347006","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
Efficient Pilot Pattern for OFDM-based Cognitive Radio Channel Estimation - Part 2 基于ofdm认知无线电信道估计的有效导频模式-第2部分
2007 14th IEEE Symposium on Communications and Vehicular Technology in the Benelux Pub Date : 2007-11-01 DOI: 10.1109/SCVT.2007.4436228
I. Budiarjo, I. Rashad, H. Nikookar
{"title":"Efficient Pilot Pattern for OFDM-based Cognitive Radio Channel Estimation - Part 2","authors":"I. Budiarjo, I. Rashad, H. Nikookar","doi":"10.1109/SCVT.2007.4436228","DOIUrl":"https://doi.org/10.1109/SCVT.2007.4436228","url":null,"abstract":"This paper is the extension of the first paper (Rashad et al., 2007) that described the modification of rectangular pilot pattern applied in OFDM-based cognitive radio system. In this paper, a new concept for pilot symbols arrangement in OFDM transmission system is introduced. The new idea is the virtual pilot symbols concept which is based on the interpolation of the received pilot symbols. Further in the paper virtual pilot symbols concept together with the modified hexagonal pilot pattern are proposed as a new pilot symbols arrangement technique for OFDM-based cognitive radio system. Using the proposed pilot patterns, the channel estimation based on two cascaded one dimensional (2times1-D) Wiener filter is investigated by simulation. Both narrowband and wideband Licensed Users are considered. The results have shown more than 15 dB SNR gain is achieved by the hexagonal pilot pattern with virtual pilot symbol at channel estimate mean square error (MSE) 2 times 10-3 compared to the regular rectangular pilot pattern.","PeriodicalId":224906,"journal":{"name":"2007 14th IEEE Symposium on Communications and Vehicular Technology in the Benelux","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133002608","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: 20
Feedback Compression for Correlated Broadcast Channels 相关广播信道的反馈压缩
2007 14th IEEE Symposium on Communications and Vehicular Technology in the Benelux Pub Date : 2007-11-01 DOI: 10.1109/SCVT.2007.4436258
C. Simon, R. de Francisco, D. Slock, G. Leus
{"title":"Feedback Compression for Correlated Broadcast Channels","authors":"C. Simon, R. de Francisco, D. Slock, G. Leus","doi":"10.1109/SCVT.2007.4436258","DOIUrl":"https://doi.org/10.1109/SCVT.2007.4436258","url":null,"abstract":"In this paper we apply predictive vector quantization (PVQ) to quantize time-correlated broadcast channels. PVQ exploits the time-correlation of the channel to reduce the quantization error of the channels, and thus to improve the sum rate of the system. PVQ predicts the actual channel based on a number of previous channels, and then quantizes the difference between the prediction and the true channel. In this paper we show how the corresponding codebooks can be designed, and we present a prediction strategy. The performance of PVQ for a broadcast system is depicted through numerical simulations.","PeriodicalId":224906,"journal":{"name":"2007 14th IEEE Symposium on Communications and Vehicular Technology in the Benelux","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123575895","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
The impact of Rayleigh fading on packet loss in FEC-protected real-time packet-based transmission systems 基于fec的实时分组传输系统中瑞利衰落对丢包的影响
2007 14th IEEE Symposium on Communications and Vehicular Technology in the Benelux Pub Date : 2007-11-01 DOI: 10.1109/SCVT.2007.4436233
J. Neckebroek, F. Vanhaverbeke, M. Moeneclaey
{"title":"The impact of Rayleigh fading on packet loss in FEC-protected real-time packet-based transmission systems","authors":"J. Neckebroek, F. Vanhaverbeke, M. Moeneclaey","doi":"10.1109/SCVT.2007.4436233","DOIUrl":"https://doi.org/10.1109/SCVT.2007.4436233","url":null,"abstract":"This contribution deals with the transmission of video packets over a wireless link subject to slow Rayleigh fading. In order to provide protection against transmission errors and video packet erasures, we apply forward error correction (FEC) both on the physical layer and the packet layer, which involves the transmission of parity bits and parity packets that enable to recover a number of bit errors and packet erasures. We present an expression for the diversity gain provided, in terms of the fading coherence time, the allowable latency, and the allowable transmission overhead.","PeriodicalId":224906,"journal":{"name":"2007 14th IEEE Symposium on Communications and Vehicular Technology in the Benelux","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124181943","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
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