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2011 6th International ICST Conference on Communications and Networking in China (CHINACOM)最新文献

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Performance analysis of multiple antenna systems within different techniques 不同技术下多天线系统的性能分析
2011 6th International ICST Conference on Communications and Networking in China (CHINACOM) Pub Date : 2011-08-17 DOI: 10.1109/ChinaCom.2011.6158283
Varsha Rao Bolar, Q. Liang, Lei Xu, Xiaorong Wu, Baoju Zhang
{"title":"Performance analysis of multiple antenna systems within different techniques","authors":"Varsha Rao Bolar, Q. Liang, Lei Xu, Xiaorong Wu, Baoju Zhang","doi":"10.1109/ChinaCom.2011.6158283","DOIUrl":"https://doi.org/10.1109/ChinaCom.2011.6158283","url":null,"abstract":"Wireless communication systems have ever increasing demand for reliable communication, higher capacity, flexible data rate and wide variety of applications under the constraint of available resources like bandwidth and power. Meanwhile, multiple input multiple output (MIMO) system is implemented using space-time codes (STC) to achieve maximum diversity, maximum coding gain and the highest possible throughput for wireless communications. In this paper, we applied several popular techniques to MIMO system and study its performance. We explored the MIMO system over an un-coded system using Rayleigh flat fading channel. We also studied and compared the MIMO system using different channel coding techniques. Finally, the performance of MIMO system applying various interleaving and puncturing schemes is analyzed and proved to gain some improvement.","PeriodicalId":339961,"journal":{"name":"2011 6th International ICST Conference on Communications and Networking in China (CHINACOM)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126410333","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-resolution TOA estimation for IR-UWB ranging based on low-rate compressed sampling 基于低速率压缩采样的IR-UWB测距高分辨率TOA估计
2011 6th International ICST Conference on Communications and Networking in China (CHINACOM) Pub Date : 2011-08-17 DOI: 10.1109/ChinaCom.2011.6158201
Shaohua Wu, Qinyu Zhang, H. Yao, Qiaoling Zhang
{"title":"High-resolution TOA estimation for IR-UWB ranging based on low-rate compressed sampling","authors":"Shaohua Wu, Qinyu Zhang, H. Yao, Qiaoling Zhang","doi":"10.1109/ChinaCom.2011.6158201","DOIUrl":"https://doi.org/10.1109/ChinaCom.2011.6158201","url":null,"abstract":"Traditionally, high-precision TOA estimation for IR-UWB ranging relies on extremely high-rate sampling, which is difficult to implement with low-cost. In this paper, by introducing the newly emerging compressed sensing (CS) theory to the design of IR-UWB ranging system, low-rate sampling based high-precision TOA estimation is realized. The matching-pursuit search-back (MP-SB) algorithm for TOA estimation is proposed, which utilizes iterative search and threshold comparison to detect the 1st path from the compressed sensing measurements of the received ranging signal. The detection threshold in each iteration step is adaptively optimized. The performance of the proposed method is analyzed through simulations under IEEE 802.15.4a channel models. Results show that the proposed method can obtain high-precision ranging results with measurements far less than Nyquist-rate samples. Therefore, the proposed method serves as an alternative practical high-precision IR-UWB ranging method. 1","PeriodicalId":339961,"journal":{"name":"2011 6th International ICST Conference on Communications and Networking in China (CHINACOM)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127468460","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
A low-complexity CFO compensation scheme for uplink interleaved OFDMA 一种低复杂度的上行交叉OFDMA CFO补偿方案
2011 6th International ICST Conference on Communications and Networking in China (CHINACOM) Pub Date : 2011-08-17 DOI: 10.1109/ChinaCom.2011.6158140
Jia Yang, Gang Wu, Xu He, Yue Xiao, Shaoqian Li
{"title":"A low-complexity CFO compensation scheme for uplink interleaved OFDMA","authors":"Jia Yang, Gang Wu, Xu He, Yue Xiao, Shaoqian Li","doi":"10.1109/ChinaCom.2011.6158140","DOIUrl":"https://doi.org/10.1109/ChinaCom.2011.6158140","url":null,"abstract":"In this paper, a improved low-complexity scheme is presented to compensate the multiple carrier frequency offsets (CFOs) in the uplink of interleaved orthogonal frequency division multiple access (OFDMA) systems. Based on the assumption that multiple CFOs is modeled as Gaussian variables [11][12], all the users are divided into two different sets, defined as large CFO users set (LCUS) and small CFO users set (SCUS) in the proposed scheme. Then, a joint CFO compensation algorithm for both LCUS and SCUS is proposed to make a better tradeoff between computational complexity and system performance. Simulation results show that the proposed scheme achieves a comparable system performance in terms of bit error rate compared to Zero-forcing (ZF) scheme and parallel interference cancellation (PIC) scheme whereas its computational complexity is much lower than the two conventional schemes.","PeriodicalId":339961,"journal":{"name":"2011 6th International ICST Conference on Communications and Networking in China (CHINACOM)","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130314979","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
Modeling and analysis of dynamic spectrum allocation in high-speed railways 高速铁路动态频谱分配建模与分析
2011 6th International ICST Conference on Communications and Networking in China (CHINACOM) Pub Date : 2011-08-17 DOI: 10.1109/ChinaCom.2011.6158338
Liang Chen, Hong Ji, Yi Li, Xi Li
{"title":"Modeling and analysis of dynamic spectrum allocation in high-speed railways","authors":"Liang Chen, Hong Ji, Yi Li, Xi Li","doi":"10.1109/ChinaCom.2011.6158338","DOIUrl":"https://doi.org/10.1109/ChinaCom.2011.6158338","url":null,"abstract":"Chinese Train Control System (CTCS) is based on mobile communication, which the key problem is how to support reliability and security of control information transmission to improve track utilization and enhance train safety. In this paper, we firstly propose a control-prioritized Markov approach for dynamic spectrum allocation for high-speed railways wireless communications, which models the interactions between the control transmissions and application transmissions as continuous time Markov chains, we further develop a proportional fairness based approach to optimally coordinate the spectrum allocation of the application transmissions. The simulation results show that the proposed control-prioritized dynamic spectrum allocation approach not only enhances the reliability and security of the control transmissions, but also guarantees efficiency and fairness spectrum sharing among application transmissions.","PeriodicalId":339961,"journal":{"name":"2011 6th International ICST Conference on Communications and Networking in China (CHINACOM)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134539554","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
Timing offset estimation based on novel preamble designs for OFDM system 基于新型前置设计的OFDM系统时间偏移估计
2011 6th International ICST Conference on Communications and Networking in China (CHINACOM) Pub Date : 2011-08-17 DOI: 10.1109/ChinaCom.2011.6158202
Kanghui Dong, Fang Yang, Lifeng He, Jian Song
{"title":"Timing offset estimation based on novel preamble designs for OFDM system","authors":"Kanghui Dong, Fang Yang, Lifeng He, Jian Song","doi":"10.1109/ChinaCom.2011.6158202","DOIUrl":"https://doi.org/10.1109/ChinaCom.2011.6158202","url":null,"abstract":"In this paper, two preamble designs and the corresponding timing offset estimation methods for orthogonal frequency division multiplexing (OFDM) systems are proposed. The performance of the timing offset estimations in both additive white Gaussian noise (AWGN) channel and multipath channel in term of estimation variance is obtained by computer simulation. Compared to the conventional Minn's method, both proposed methods are robust and present much smaller variance in multipath channels.","PeriodicalId":339961,"journal":{"name":"2011 6th International ICST Conference on Communications and Networking in China (CHINACOM)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123947119","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
Asymmetrical handover algorithm for broadcast services in broadband wireless multimedia systems 宽带无线多媒体系统中广播业务的不对称切换算法
2011 6th International ICST Conference on Communications and Networking in China (CHINACOM) Pub Date : 2011-08-17 DOI: 10.1109/ChinaCom.2011.6158285
Min Wang, Chunyan Feng, Tiankui Zhang
{"title":"Asymmetrical handover algorithm for broadcast services in broadband wireless multimedia systems","authors":"Min Wang, Chunyan Feng, Tiankui Zhang","doi":"10.1109/ChinaCom.2011.6158285","DOIUrl":"https://doi.org/10.1109/ChinaCom.2011.6158285","url":null,"abstract":"To guarantee the quality of service (QoS) of broadcast services in broadband wireless multimedia (BWM) systems, a novel seamless broadcast cell asymmetrical handover (BCAH) algorithm is proposed. BCAH adopts the asymmetrical handover between the broadcast base station (BBS) with point-to-multipoint (PTM) transmission and the cell base station (CBS) with point-to-point (PTP) transmission. The handover from BBS PTM to CBS PTP takes into account the handover delay for accurate execution to maximize the utilization of the broadcast resources. The handover from CBS PTP to BBS PTM reduces unnecessary handover by considering the handover threshold predefined with QoS requirement of broadcast services to avoid ping-pong effect. BCAH maximizes the resource utilization while providing the continuity of broadcast services with QoS guarantees. Simulation results show that the proposed algorithm improves system performance in terms of throughput and delay.","PeriodicalId":339961,"journal":{"name":"2011 6th International ICST Conference on Communications and Networking in China (CHINACOM)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127637812","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
Combination of interference alignment and beamforming in cellular networks 蜂窝网络中干扰对准与波束形成的结合
2011 6th International ICST Conference on Communications and Networking in China (CHINACOM) Pub Date : 2011-08-17 DOI: 10.1109/ChinaCom.2011.6158181
Chao Zhou, Wei Chen, Zhi Chen
{"title":"Combination of interference alignment and beamforming in cellular networks","authors":"Chao Zhou, Wei Chen, Zhi Chen","doi":"10.1109/ChinaCom.2011.6158181","DOIUrl":"https://doi.org/10.1109/ChinaCom.2011.6158181","url":null,"abstract":"In this paper, a new technique is proposed to improve the throughput performance of relay backhaul links in cellular networks for the case of imperfect channel knowledge,which could be implemented with small changes to existing TD-LTE standards. The technique is based on interference alignment (IA) and beamforming (BF). Considering the effect of power gain and inter-cell interference, transmit and receive matrices are jointly designed to increase the SINR at receivers. As the collaboration between Base-Stations (BSs) is not allowed in order to simplifying the implementation, two distributed algorithms, ‘Maximize SINR’ and “Minimize Interference”, are provided in iterative manner. Simulation results show that the combination of IA and BF achieves considerable performance gain. Thereinto, the algorithm of ‘Maximize SINR’ behave excellent both in high and low SNR region, and the throughput performance of ‘Minimize Interference’ outperform traditional BF in the high SNR region.","PeriodicalId":339961,"journal":{"name":"2011 6th International ICST Conference on Communications and Networking in China (CHINACOM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128957315","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
Compensative mechanism based on steerable antennas for High Altitude Platform movement 基于可操纵天线的高空平台运动补偿机构
2011 6th International ICST Conference on Communications and Networking in China (CHINACOM) Pub Date : 2011-08-17 DOI: 10.1109/ChinaCom.2011.6158277
Hui Li, Xin Xu, Mingchuan Yang, Qing Guo
{"title":"Compensative mechanism based on steerable antennas for High Altitude Platform movement","authors":"Hui Li, Xin Xu, Mingchuan Yang, Qing Guo","doi":"10.1109/ChinaCom.2011.6158277","DOIUrl":"https://doi.org/10.1109/ChinaCom.2011.6158277","url":null,"abstract":"Because of the complexity of stratosphere, HAPs might inevitably encounter relative motion with respect to the ground, which leads to variation of quality of service in the intended coverage area. Models for predicting the geographical coverage in the cases of shift horizontally and vertically, yaw, roll and pitch of HAP are presented in this work. And also the mechanisms of compensation based on steerable antennas in these cases are explored. The mechanism is then applied to a 127 cell architecture, with a cell cluster size of four. It can be seen from the simulation result that by employing the steerable antenna correction mechanism, the movement can be compensated to some degree in order to guarantee effective coverage of the service area.","PeriodicalId":339961,"journal":{"name":"2011 6th International ICST Conference on Communications and Networking in China (CHINACOM)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129154512","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
On the capacity of finite-state channels with noisy state information at the encoder 编码器中含噪声状态信息的有限状态信道容量研究
2011 6th International ICST Conference on Communications and Networking in China (CHINACOM) Pub Date : 2011-08-17 DOI: 10.1109/ChinaCom.2011.6158162
Lin Song, Jun Chen
{"title":"On the capacity of finite-state channels with noisy state information at the encoder","authors":"Lin Song, Jun Chen","doi":"10.1109/ChinaCom.2011.6158162","DOIUrl":"https://doi.org/10.1109/ChinaCom.2011.6158162","url":null,"abstract":"We study the capacity of finite-state channels with noisy state information at the encoder. Finite-letter capacity upper and lower bounds are established. The bounds are further tightened for the case where the state process is available at the decoder.","PeriodicalId":339961,"journal":{"name":"2011 6th International ICST Conference on Communications and Networking in China (CHINACOM)","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128726000","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
Statistical analysis of error patterns in block ciphered crypto-system 分组密码系统中错误模式的统计分析
2011 6th International ICST Conference on Communications and Networking in China (CHINACOM) Pub Date : 2011-08-17 DOI: 10.1109/ChinaCom.2011.6158271
Qiuhua Yang, Jian Wang, Shuangqing Wei, Jian Yuan
{"title":"Statistical analysis of error patterns in block ciphered crypto-system","authors":"Qiuhua Yang, Jian Wang, Shuangqing Wei, Jian Yuan","doi":"10.1109/ChinaCom.2011.6158271","DOIUrl":"https://doi.org/10.1109/ChinaCom.2011.6158271","url":null,"abstract":"In the presence of channel errors, the error pattern in decrypted plaintexts in block-ciphered systems demonstrates certain burst features. In this paper, we provide a rigorous study of error properties of block-ciphered cryptosystems operating in either ECB or CFB mode. By analyzing the relationship between bits within and across adjacent output blocks, we obtain the resulting equivalent channel transitional probabilities for each case. Our statistical characterization of the underlying burst patterns is of great importance to designing powerful error correcting codes that can enhance a legitimate system's throughput under channel distortions.","PeriodicalId":339961,"journal":{"name":"2011 6th International ICST Conference on Communications and Networking in China (CHINACOM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128751902","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
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