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2006 First International Conference on Communications and Networking in China最新文献

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A New Scheme for Constructing High Code Efficiency LS ZCW Multiple Access Codes 一种构建高效LS - ZCW多址码的新方案
2006 First International Conference on Communications and Networking in China Pub Date : 2006-10-01 DOI: 10.1109/CHINACOM.2006.344710
Zheng Yu, Xing Yang, Daoben Li
{"title":"A New Scheme for Constructing High Code Efficiency LS ZCW Multiple Access Codes","authors":"Zheng Yu, Xing Yang, Daoben Li","doi":"10.1109/CHINACOM.2006.344710","DOIUrl":"https://doi.org/10.1109/CHINACOM.2006.344710","url":null,"abstract":"New zero correlation window (ZCW) LS (loosely synchronous) codes derived from basic LS codes are constructed. A general scheme for generating these codes is also discussed. It is showed mathematically that these new codes have a uniform ZCW for both aperiodic auto-correlation function (ACF) and cross-correlation function (CCF) within one group. Moreover, the minimum ZCW among different groups is the same as that of basic LS codes. The number of these new codes is more than the basic LS codes, and code efficiency can be greatly enhanced. Finally, the computer simulations verify the validity of new LS codes.","PeriodicalId":408368,"journal":{"name":"2006 First International Conference on Communications and Networking in China","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129592888","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
Predictive Picture Refresh Based on a Novel Shot Cut Detection Method for Video Transmission 基于镜头切割检测的视频传输预测图像刷新方法
2006 First International Conference on Communications and Networking in China Pub Date : 2006-10-01 DOI: 10.1109/CHINACOM.2006.344825
Yu-Hua Ai, Wu Ye, Suili Feng, Wei Zhou
{"title":"Predictive Picture Refresh Based on a Novel Shot Cut Detection Method for Video Transmission","authors":"Yu-Hua Ai, Wu Ye, Suili Feng, Wei Zhou","doi":"10.1109/CHINACOM.2006.344825","DOIUrl":"https://doi.org/10.1109/CHINACOM.2006.344825","url":null,"abstract":"In order to stop the error propagation and the quick of degradation of the reconstructed video quality, the traditional method is intra-frame refresh. This paper proposes a novel error-resilient method which names predictive picture refresh based on scene-context reference picture. And it also proposes a novel shot cut detection to achieve the scene-context reference picture, instead of the traditional video segmentations, such as pixel or histogram difference methods. And our shot cut detection needs less computation and is easily embedded in the H.264/AVC. When the unreliable wireless network requires high intra-frame-refresh rates, compared with the intra-frame-refresh method, our method can achieve apparent saving effect in frame bits while maintaining the similar quality","PeriodicalId":408368,"journal":{"name":"2006 First International Conference on Communications and Networking in China","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127413160","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
Initial Code Exchange for Asynchronous TR-UWB Ad Hoc Networks 异步TR-UWB自组织网络的初始代码交换
2006 First International Conference on Communications and Networking in China Pub Date : 2006-10-01 DOI: 10.1109/CHINACOM.2006.344807
R. Djapic, N. Shi, G. Leus
{"title":"Initial Code Exchange for Asynchronous TR-UWB Ad Hoc Networks","authors":"R. Djapic, N. Shi, G. Leus","doi":"10.1109/CHINACOM.2006.344807","DOIUrl":"https://doi.org/10.1109/CHINACOM.2006.344807","url":null,"abstract":"In this paper we present an initial code exchange scheme for a transmit-reference ultra wideband (TR-UWB) system. We exploit the facts that a TR-UWB transceiver scheme allows for simultaneous transmission and reception as well as detection and separation of distinct users with the same code even if their data packets overlap. We exploit the fact that the transmission of UWB pulses is a low power operation compared to the processing needed at the receiver side to make the initial code exchange highly energy efficient","PeriodicalId":408368,"journal":{"name":"2006 First International Conference on Communications and Networking in China","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129957972","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
Reducing Calibration Effort for WLAN Location System using Segment Technique with Autocorrelation 利用自相关分段技术减少无线局域网定位系统的校准工作量
2006 First International Conference on Communications and Networking in China Pub Date : 2006-10-01 DOI: 10.1109/CHINACOM.2006.344858
Tzu-Chieh Tsai, Cheng-Lin Li
{"title":"Reducing Calibration Effort for WLAN Location System using Segment Technique with Autocorrelation","authors":"Tzu-Chieh Tsai, Cheng-Lin Li","doi":"10.1109/CHINACOM.2006.344858","DOIUrl":"https://doi.org/10.1109/CHINACOM.2006.344858","url":null,"abstract":"Context-aware applications become more and more popular in today's life. Location-aware information has derived a lot of research issues. This paper presents a precise indoor RF-based WLAN (IEEE 802.11) locating system named precise indoor locating system (PILS). Most proposed location systems acquire well location estimation results but consume high level of manual effort to collect a huge amount of signal data. As a consequence, the system becomes impractical and manpower-wasted. In this paper, we aim to reduce the manual effort in constructing radio map and maintain high accuracy in our system. We propose models for data calibration, interpolating, and location estimation in PILS. In data calibration and location estimation models, we consider of autocorrelation of signal samples to enhance the accuracy. Wireless channel propagation model is also in our concern. Large scale and small scale fading are involved in the wireless channel propagation.","PeriodicalId":408368,"journal":{"name":"2006 First International Conference on Communications and Networking in China","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130637759","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
An High Integrated Direct Digital Frequency Synthesis System Design 一种高集成度直接数字频率合成系统设计
2006 First International Conference on Communications and Networking in China Pub Date : 2006-10-01 DOI: 10.1109/CHINACOM.2006.344918
Qingdong Wang, C. Xie, Haiwei Wang
{"title":"An High Integrated Direct Digital Frequency Synthesis System Design","authors":"Qingdong Wang, C. Xie, Haiwei Wang","doi":"10.1109/CHINACOM.2006.344918","DOIUrl":"https://doi.org/10.1109/CHINACOM.2006.344918","url":null,"abstract":"This paper researches a programmable signal generator by an high integrated direct digital frequency synthesis (DDFS) technology on FPGA to simulate servo signal for read-write channel of micro hard disk. This device use very large-scale integrated circuit FPGA (field-programmable logic) to integrate PDSP (programmable digital signal processor) for look-up table and integrate DDFS design, use 16 bit high resolution DAC (digital to analog converter) .This device has high precision of frequency, phase and amplitude of output wave, good reliability, little distortion. Compared with general devices, this device can generate all kinds of servo signal, and circuit is simply, reliable, and programmable.","PeriodicalId":408368,"journal":{"name":"2006 First International Conference on Communications and Networking in China","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125308262","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
Distributed File Sharing: Network Coding Meets Compressed Sensing 分布式文件共享:网络编码与压缩感知
2006 First International Conference on Communications and Networking in China Pub Date : 2006-10-01 DOI: 10.1109/CHINACOM.2006.344708
Huimin Chen
{"title":"Distributed File Sharing: Network Coding Meets Compressed Sensing","authors":"Huimin Chen","doi":"10.1109/CHINACOM.2006.344708","DOIUrl":"https://doi.org/10.1109/CHINACOM.2006.344708","url":null,"abstract":"In a peer-to-peer file distribution network, a large file is split into blocks residing in multiple storage locations. A peer node tries to retrieve the original file by downloading blocks from randomly chosen peers. We compare the performance of four storage strategies: uncoded, erasure coding, random linear coding, and random linear coding over coded blocks. We show that, in principle, random linear coding makes a better tradeoff between the storage requirement and decoding complexity. However, the sparsity of the file blocks is not fully exploited by random linear combinations of all original blocks. Motivated by the recent results from compressed sensing, we study the design tradeoff in random linear coding over coded blocks and propose an efficient decoding algorithm based on basis pursuit. We show that the minimum number of storage locations that a peer note has to connect to reconstruct the entire file with high probability can be significantly smaller than the total number of blocks that the file is broken into","PeriodicalId":408368,"journal":{"name":"2006 First International Conference on Communications and Networking in China","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123196043","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
A Hybrid Transport Protocol for High Speed Data Transferring in Long Fat Network 一种用于长胖网络高速数据传输的混合传输协议
2006 First International Conference on Communications and Networking in China Pub Date : 2006-10-01 DOI: 10.1109/CHINACOM.2006.344788
Yoonjoo Kwon, Woojin Seok, Giljae Lee, Okhwan Byeon
{"title":"A Hybrid Transport Protocol for High Speed Data Transferring in Long Fat Network","authors":"Yoonjoo Kwon, Woojin Seok, Giljae Lee, Okhwan Byeon","doi":"10.1109/CHINACOM.2006.344788","DOIUrl":"https://doi.org/10.1109/CHINACOM.2006.344788","url":null,"abstract":"There are many emerging eScience applications. More and more scientists want to collaborate on their investigation with international partners without space limitation by using these applications. Since these applications have to analyze the massive raw data, scientists need to send and receive the data in short time. Most of applications use TCP for data transfer. But TCP was designed under low bandwidth network, therefore, general TCP, for example Reno TCP, cannot utilize the whole bandwidth of high capacity network. There are several TCP variants to solve TCP problems related to high speed networking. They can be classified into two groups: loss based TCP and delay based TCP. In this paper, I will compare two approaches of TCP variants and propose a hybrid approach for high speed networking","PeriodicalId":408368,"journal":{"name":"2006 First International Conference on Communications and Networking in China","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123073129","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
Fault Detection and Localization Scheme for All-Optical Overlaid-Star TDM Networks 全光叠星TDM网络故障检测与定位方案
2006 First International Conference on Communications and Networking in China Pub Date : 2006-10-01 DOI: 10.1109/CHINACOM.2006.344853
Jun Zheng, Cheng Peng, G. Bochmann
{"title":"Fault Detection and Localization Scheme for All-Optical Overlaid-Star TDM Networks","authors":"Jun Zheng, Cheng Peng, G. Bochmann","doi":"10.1109/CHINACOM.2006.344853","DOIUrl":"https://doi.org/10.1109/CHINACOM.2006.344853","url":null,"abstract":"Fault detection and localization is a crucial issue in all-optical networks. Since most commercially-available all-optical space switches are incapable of detecting the loss of optical signals along the data paths between its input ports and output ports, fault localization becomes a challenge for providing service survivability in such networks. This paper proposes a fault detection and localization scheme for an all-optical overlaid-star TDM network. The proposed scheme employs a fault localization technique that identifies the location of a failure by detecting the power loss of optical signals in data and control channels. Two alternatives are proposed. One requires a control channel on each wavelength of a fiber link while the other requires a small data block to be transmitted in each non-allocated data channel. Based on the proposed fault localization technique, a fault advertisement protocol is further presented, which can be incorporated into the signaling protocol used in the network to facilitate the provisioning of static protection or dynamic restoration. The data loss, fault detection time, and connection recovery time are analyzed for the different failure scenarios.","PeriodicalId":408368,"journal":{"name":"2006 First International Conference on Communications and Networking in China","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123839198","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 Robust Iterative Multiframe Super-Resolution Reconstruction using a Huber Statistical Estimation Technique 基于Huber统计估计技术的鲁棒迭代多帧超分辨率重建
2006 First International Conference on Communications and Networking in China Pub Date : 2006-10-01 DOI: 10.1109/CHINACOM.2006.344865
V. Patanavijit, S. Jitapunkul
{"title":"A Robust Iterative Multiframe Super-Resolution Reconstruction using a Huber Statistical Estimation Technique","authors":"V. Patanavijit, S. Jitapunkul","doi":"10.1109/CHINACOM.2006.344865","DOIUrl":"https://doi.org/10.1109/CHINACOM.2006.344865","url":null,"abstract":"The traditional SRR (super-resolution reconstruction) estimations are based on L1 or L2 statistical norm estimation therefore these SRR methods are usually very sensitive to their assumed model of data and noise, which limits their utility. This paper reviews some of these methods and addresses their shortcomings. We propose an alternate SRR approach based on a statistical estimation technique. By minimizing a cost function, the Huber norm is used for measuring the difference between the projected estimate of the high-resolution image and each low resolution image, removing outliers in the data and Tikhonov regularization is used to remove artifacts from the final answer and improve the rate of convergence. The experimental results confirm the effectiveness of our method and demonstrate its superiority to other super-resolution methods based on L1 and L2 norm for a several noise models such as noiseless, AWGN, Poisson and Salt&Pepper noise.","PeriodicalId":408368,"journal":{"name":"2006 First International Conference on Communications and Networking in China","volume":"121 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116573602","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
Adaptive Power Allocation for OFDM Systems with Joint Tx-Rx Beamforming 联合Tx-Rx波束形成OFDM系统的自适应功率分配
2006 First International Conference on Communications and Networking in China Pub Date : 2006-10-01 DOI: 10.1109/CHINACOM.2006.344801
Hongwu Liu, Ji Li
{"title":"Adaptive Power Allocation for OFDM Systems with Joint Tx-Rx Beamforming","authors":"Hongwu Liu, Ji Li","doi":"10.1109/CHINACOM.2006.344801","DOIUrl":"https://doi.org/10.1109/CHINACOM.2006.344801","url":null,"abstract":"Orthogonal frequency division multiplexing (OFDM) is a promising scheme for broadband wireless communications. The combination of joint transmit-receive (Tx-Rx) beamforming with OFDM promises an enhanced performance. Two kinds of adaptive power allocation schemes are proposed for OFDM systems with joint Tx-Rx beamforming. The optimal power allocation schemes are based on the criterions of maximizing signal-to-noise ratio (SNR) and maximizing average throughput, respectively. Simplified schemes with complexity reduction are also presented. The performance potentials of the proposed schemes are demonstrated by simulation results","PeriodicalId":408368,"journal":{"name":"2006 First International Conference on Communications and Networking in China","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127559845","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
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