发布求助
文献互助 智能选刊 最新文献

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

筛选
英文 中文
A concatenated coded modulation scheme and its iterative receiving for deep space communications 一种用于深空通信的级联编码调制方案及其迭代接收
2011 6th International ICST Conference on Communications and Networking in China (CHINACOM) Pub Date : 2011-08-17 DOI: 10.1109/ChinaCom.2011.6158314
Gengxin Zhang, Dongming Bian, Jing Hu, Zhidong Xie, Qian Sun
{"title":"A concatenated coded modulation scheme and its iterative receiving for deep space communications","authors":"Gengxin Zhang, Dongming Bian, Jing Hu, Zhidong Xie, Qian Sun","doi":"10.1109/ChinaCom.2011.6158314","DOIUrl":"https://doi.org/10.1109/ChinaCom.2011.6158314","url":null,"abstract":"Due to the long propagation distance between spacecraft and Earth station the high power efficiency is more important for deep space communication than others communication systems. One novel coded modulation scheme based on AR4JA code and FQPSK (Feher's QPSK) is proposed out in this paper, which can alleviate the challenge of huge loss in space communications. The novel approach utilizes the property that AR4JA code enables communication at very low signal noise rate and constant envelope property of FQPSK to overcome the nonlinear impact of high power amplifier. At receiver, large gain can be attained by iterative demodulation and decoding. The paper presents the system model of coded modulation and proposes out iterative receive algorithm. Finally, the bit error rate performance of new scheme is confirmed by computer simulation.","PeriodicalId":339961,"journal":{"name":"2011 6th International ICST Conference on Communications and Networking in China (CHINACOM)","volume":"46 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":"123516089","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
Road condition monitoring using on-board Three-axis Accelerometer and GPS Sensor 使用车载三轴加速度计和GPS传感器进行路况监测
2011 6th International ICST Conference on Communications and Networking in China (CHINACOM) Pub Date : 2011-08-17 DOI: 10.1109/ChinaCom.2011.6158308
Kongyang Chen, Mingming Lu, Xiaopeng Fan, Mingming Wei, Jinwu Wu
{"title":"Road condition monitoring using on-board Three-axis Accelerometer and GPS Sensor","authors":"Kongyang Chen, Mingming Lu, Xiaopeng Fan, Mingming Wei, Jinwu Wu","doi":"10.1109/ChinaCom.2011.6158308","DOIUrl":"https://doi.org/10.1109/ChinaCom.2011.6158308","url":null,"abstract":"A study by US Federal Highway Administration has shown that road condition is an essential factor of highway quality and smooth roads will lead to more comfortable driving experience and less municipal investment. International Roughness Index (IRI) has been widely used to measure pavement smoothness because it can provide a consistent rating for different measurement tools. However, existing measuring tools based on IRI are usually very expensive. In this paper, we present a low-cost vehicle-based solution, Road Condition Monitoring with Three-axis Accelerometers and GPS Sensors (RCM-TAGPS), by using a cheap three-axis accelerometer and a GPS sensor embedded in a vehicle to monitor the road condition. We analyze the Power Spectral Density (PSD) of pavement roughness, estimate IRI, and classify the pavement roughness level into four levels according to a Chinese industry standard. Experimental results show that RCM-TAGPS can evaluate pavement roughness level correctly, even under some interference like potholes, manholes and decelerating belts, and the total cost of RCM-TAGPS in each vehicle is no more than 50 dollars, which is about 1/4400 to 1/160 of the existing system used in civil engineering and municipal engineering.","PeriodicalId":339961,"journal":{"name":"2011 6th International ICST Conference on Communications and Networking in China (CHINACOM)","volume":"14 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":"124964031","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: 109
Improved subcarrier allocation in cooperative OFDMA system 协作OFDMA系统中改进的子载波分配
2011 6th International ICST Conference on Communications and Networking in China (CHINACOM) Pub Date : 2011-08-17 DOI: 10.1109/ChinaCom.2011.6158117
Jing-ning Wang, Xuanli Wu, Xuezhi Tan
{"title":"Improved subcarrier allocation in cooperative OFDMA system","authors":"Jing-ning Wang, Xuanli Wu, Xuezhi Tan","doi":"10.1109/ChinaCom.2011.6158117","DOIUrl":"https://doi.org/10.1109/ChinaCom.2011.6158117","url":null,"abstract":"Focusing on the low throughput of fair subcarrier allocation in cooperative OFDMA system, an improved algorithm with single subcarrier capacity threshold and cooperative power factor is proposed. In this algorithm, the users with bad channel can not occupy too many subcarrier, and the power for cooperating with other users of users with good channel is limited. Simulation results show that this algorithm can increase the total channel capacity with less loss of fairness.","PeriodicalId":339961,"journal":{"name":"2011 6th International ICST Conference on Communications and Networking in China (CHINACOM)","volume":"74 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":"125525741","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
Blind Source Separation based on Compressed Sensing 基于压缩感知的盲源分离
2011 6th International ICST Conference on Communications and Networking in China (CHINACOM) Pub Date : 2011-08-17 DOI: 10.1109/ChinaCom.2011.6158262
Zhenghua Wu, Yi Shen, Qiang Wang, Jie Liu, Bo Li
{"title":"Blind Source Separation based on Compressed Sensing","authors":"Zhenghua Wu, Yi Shen, Qiang Wang, Jie Liu, Bo Li","doi":"10.1109/ChinaCom.2011.6158262","DOIUrl":"https://doi.org/10.1109/ChinaCom.2011.6158262","url":null,"abstract":"Blind Source Separation (BSS) is an important issue in the coherent processing of multi-dimensional data. To recover and separate the sources from underdetermined mixtures, some prior information like sparse representation is required. The principle is very similar to the new technique named Compressed Sensing (CS), which asserts that one can recover a sparse signal from a limited number of random projections. In this paper, the relationship between BSS and CS is studied by equivalent transformation, then we propose the linear operator by which the relationship between the sources and the mixtures is modeled in two ways: RIP and incoherence, and give some instructive conclusions for the operator design. Numerical simulation applying the FOOMP algorithm and a operator we propose are conducted to demonstrate the good performance of the whole framework.","PeriodicalId":339961,"journal":{"name":"2011 6th International ICST Conference on Communications and Networking in China (CHINACOM)","volume":"71 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":"127110315","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
An improved multicarrier differential CDMA system with synchronization errors in HF channels 一种改进的高频信道同步误差多载波差分CDMA系统
2011 6th International ICST Conference on Communications and Networking in China (CHINACOM) Pub Date : 2011-08-17 DOI: 10.1109/ChinaCom.2011.6158109
Leizhen Zhou, Minjian Zhao, J. Zhong, Yunlong Cai
{"title":"An improved multicarrier differential CDMA system with synchronization errors in HF channels","authors":"Leizhen Zhou, Minjian Zhao, J. Zhong, Yunlong Cai","doi":"10.1109/ChinaCom.2011.6158109","DOIUrl":"https://doi.org/10.1109/ChinaCom.2011.6158109","url":null,"abstract":"Under the time variant and fading HF channel, an improved Multicarrier CDMA System using Frequent Domain Differential Detection (MC-FDDD-CDMA) for low SNR links is proposed. With synchronization errors, including frequent offset and timing offset, we analyze the system BER performance under the fast fading HF channel, where the adjacent subcarriers have different channel responses. The results show that the synchronization errors reduce the desired signal amplitude, and introduce ICI. In addition, a Common Phase Error is generated by differential detection, which causes the rotation of signal constellation and limits the system BER performance. Therefore, we exploit a novel phase estimation method applicable to the MC-FDDD-CDMA system. Finally, computer simulations prove that the improved system can effectively reduce the CPE and considerably promote the BER performance under the low SNR HF channels.","PeriodicalId":339961,"journal":{"name":"2011 6th International ICST Conference on Communications and Networking in China (CHINACOM)","volume":"59 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":"127431824","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
Security architecture for satellite services over cryptographically heterogeneous networks 加密异构网络上卫星服务的安全体系结构
2011 6th International ICST Conference on Communications and Networking in China (CHINACOM) Pub Date : 2011-08-17 DOI: 10.1109/ChinaCom.2011.6158319
Yingli Sheng, H. Cruickshank, M. Moseley, J. Ashworth
{"title":"Security architecture for satellite services over cryptographically heterogeneous networks","authors":"Yingli Sheng, H. Cruickshank, M. Moseley, J. Ashworth","doi":"10.1109/ChinaCom.2011.6158319","DOIUrl":"https://doi.org/10.1109/ChinaCom.2011.6158319","url":null,"abstract":"The rapid growth in the demand for Internet services and many new applications has driven the development of satellite, which are the preferred delivery mechanism due to its wide area coverage, multicasting capacity and speed to deliver affordable future services. However, security has been one of the barriers for satellite services, especially for domains spanning over cryptographically heterogeneous networks. In this paper, a scalable and adaptable security architecture is specified to protect satellite services. Two major issues in the proposed security architecture, key management and policy provisioning, are presented and analyzed. And three scenarios, mobile network, fixed network and Delay Tolerant Network (DTN), are presented, with details on characteristics and security features.","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":"128862351","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
A code assignment algorithm for multi-user/multi-rate 2-dimensional block spread SC-CDMA 多用户/多速率二维块扩展SC-CDMA的编码分配算法
2011 6th International ICST Conference on Communications and Networking in China (CHINACOM) Pub Date : 2011-08-17 DOI: 10.1109/ChinaCom.2011.6158139
Qiyue Yu, W. Meng, F. Adachi
{"title":"A code assignment algorithm for multi-user/multi-rate 2-dimensional block spread SC-CDMA","authors":"Qiyue Yu, W. Meng, F. Adachi","doi":"10.1109/ChinaCom.2011.6158139","DOIUrl":"https://doi.org/10.1109/ChinaCom.2011.6158139","url":null,"abstract":"2-dimensional (2D) block spread CDMA is able to achieve multiple-access interference (MAI) uplink transmission free in a slow fading channel. An important issue is how to efficiently assign the limited resource of spreading codes to users with different data rates to assure the requirement of quality of service (QoS). In this paper, a code assignment algorithm is proposed for the uplink 2D block spread SC-CDMA. Computer simulation is showed that the proposed code assignment algorithm achieves lower blocking probability than traditional CDMA.","PeriodicalId":339961,"journal":{"name":"2011 6th International ICST Conference on Communications and Networking in China (CHINACOM)","volume":"115 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120968698","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
An energy-efficient virtual cluster aggregation algorithm in MAC design for wireless sensor network 无线传感器网络MAC设计中一种节能的虚拟聚类聚合算法
2011 6th International ICST Conference on Communications and Networking in China (CHINACOM) Pub Date : 2011-08-17 DOI: 10.1109/ChinaCom.2011.6158170
Chenguang He, X. Sha
{"title":"An energy-efficient virtual cluster aggregation algorithm in MAC design for wireless sensor network","authors":"Chenguang He, X. Sha","doi":"10.1109/ChinaCom.2011.6158170","DOIUrl":"https://doi.org/10.1109/ChinaCom.2011.6158170","url":null,"abstract":"The MAC protocol design for wireless sensor networks has been researched and developed for decades. SMAC is a famous energy-efficient MAC. In SMAC, the boundary nodes problem brings seriously energy consumption. Because the bounder node follows multiple schedules in one cycle, it may deplete earlier and cause segmentation in sensor network. The paper proposes the virtual cluster aggregation algorithm to solve this problem. The algorithm reduces energy consumption of boundary nodes and extends the lifetime of entire sensor network by merging different virtual clusters. The simulation results show that the performance of SMAC with the virtual cluster aggregation algorithm obtains improvement.","PeriodicalId":339961,"journal":{"name":"2011 6th International ICST Conference on Communications and Networking in China (CHINACOM)","volume":"257 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120862959","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
A tractable mechanism for external calibration in non-overlapping camera network 一种易于处理的非重叠摄像机网络外部标定机制
2011 6th International ICST Conference on Communications and Networking in China (CHINACOM) Pub Date : 2011-08-17 DOI: 10.1109/ChinaCom.2011.6158281
Qiang Wang, Yan Liu
{"title":"A tractable mechanism for external calibration in non-overlapping camera network","authors":"Qiang Wang, Yan Liu","doi":"10.1109/ChinaCom.2011.6158281","DOIUrl":"https://doi.org/10.1109/ChinaCom.2011.6158281","url":null,"abstract":"To use a non-overlapping camera networks, the cameras' external parameters (i.e. the position and orientation of the camera) must be calibrated first. Among the popular approaches, the method proposed by Ali has been shown to work effectively with less constraints compared to alternative approaches. However, the poor robustness of the method, which may incur some practical problems, inspires us to develop a three-step mechanism to address these problems. First, the factors of the measurements impacting the error of the results are analyzed based on more than 10,000 synthetic trajectories. Second, the trajectories are classified into 4 reasonable types according to these factors. Finally, based on the statistics, this paper presents a tractable mechanism for selecting or generating the best route for the calibration target to take in order to provide improved calibration results for the cameras. The comparison between the errors associated with trajectories generated with or without the proposed mechanism are presented using a Cumulative Density Function (CDF) curve.","PeriodicalId":339961,"journal":{"name":"2011 6th International ICST Conference on Communications and Networking in China (CHINACOM)","volume":"11 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":"115233379","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
Generalized MIMO channel model and its capacity analysis in formation flying satellite communication systems 编队卫星通信系统中广义MIMO信道模型及其容量分析
2011 6th International ICST Conference on Communications and Networking in China (CHINACOM) Pub Date : 2011-08-17 DOI: 10.1109/ChinaCom.2011.6158316
Lei Zhang, Lidong Zhu, Cheng Ju
{"title":"Generalized MIMO channel model and its capacity analysis in formation flying satellite communication systems","authors":"Lei Zhang, Lidong Zhu, Cheng Ju","doi":"10.1109/ChinaCom.2011.6158316","DOIUrl":"https://doi.org/10.1109/ChinaCom.2011.6158316","url":null,"abstract":"Formation flying satellite communication systems are composed of several satellites which are very close to each other. According to the mission requirements, we select the appropriate configuration of the formation, forming a “virtual satellite”. Each satellite is deployed a transmitting antenna, and all the satellites transmit data simultaneously through the Satellite-to-Ground link. Multiple receiving antennas are deployed in the ground station. All the formation flying satellites and the Earth station constitute a generalized MIMO system. In this paper, based on 3GPP TR25.996 specification and methods of deterministic channel model, considering the actual space propagation environment, we propose a distributed MIMO channel model for formation flying satellite systems. Some factors affecting the channel capacity are analyzed, such as the number of antennas, SNR, the formation configuration. We perform simulations based on our channel model with MATLAB. The simulation results and theoretical analysis are fitting well.","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":"115517722","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: 7
首页 上一页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信