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2008 4th IEEE International Conference on Circuits and Systems for Communications最新文献

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Continuous-Time Quadrature Bandpass Sigma Delta Modulators with Different Feedback DAC 不同反馈DAC的连续时间正交带通σ δ调制器
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.129
Xiaolong Yuan, Xiaobo Wu, S. Signell
{"title":"Continuous-Time Quadrature Bandpass Sigma Delta Modulators with Different Feedback DAC","authors":"Xiaolong Yuan, Xiaobo Wu, S. Signell","doi":"10.1109/ICCSC.2008.129","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.129","url":null,"abstract":"Continuous time (CT) quadrature bandpass sigma delta modulators (QBSDM) are widely used in wireless receivers recently due to its inherent anti-aliasing filtering and complex filtering embedded in the loops to efficiently realize asymmetric noise-shaping. The complex noise-transfer-function (NTF) can be realized with complex coefficients or by implementing the loop as a cascade of complex integrators with only real coefficients, which is desirable due to its lower sensitivity to loop mismatch. In this paper, we will study the effect of different feedback waveforms inside the modulator on the NTF of quadrature sigma delta modulators. Complex NTF design is discussed for different bandpass center frequencies relative to the sampling frequency.","PeriodicalId":137660,"journal":{"name":"2008 4th IEEE International Conference on Circuits and Systems for Communications","volume":"241 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116709057","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
Bit Truncated Multiuser OFDM-CDMA Systems in Rayleigh Fading Channel 瑞利衰落信道中位截断多用户OFDM-CDMA系统
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.189
Sui Jia, Zhang Shu
{"title":"Bit Truncated Multiuser OFDM-CDMA Systems in Rayleigh Fading Channel","authors":"Sui Jia, Zhang Shu","doi":"10.1109/ICCSC.2008.189","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.189","url":null,"abstract":"OFDM technique increases the robustness against frequency selective fading or narrowband interference, combined it with code-division multiple accessing implements multiuser communication system. We propose transmission power truncation in OFDM-CDMA systems, when the channel power gain is lower than a certain threshold, corresponding bit is not transmitted. The reason is that bits in deep-fading period are highly likely to be in error, and if transmitted would waste the transmission power and generate interference to other users. So truncating these bits' transmission power and redistributing the power resource will reduce the multi-user interference, increase the SINR and improve communication quality. Subchannel truncation is adopted to combat poor channel situations. We analyze the BER performance of the truncated system under the channel of rayleigh fading and multiuser interference, and compare the BER and throughput performance by simulation.","PeriodicalId":137660,"journal":{"name":"2008 4th IEEE International Conference on Circuits and Systems for Communications","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125144913","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
Switch Delay Analysis of a Multi-Channel Delivery Method for IPTV IPTV多通道传输方法的切换时延分析
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.106
Kan Lin, Weiqiang Sun
{"title":"Switch Delay Analysis of a Multi-Channel Delivery Method for IPTV","authors":"Kan Lin, Weiqiang Sun","doi":"10.1109/ICCSC.2008.106","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.106","url":null,"abstract":"IPTV technology is still faced with such concerns in its quality of service as channel switch delay. One way among many that are devised to reduce this delay is multi-channel synchronous delivery. However, the bandwidth efficiency of this method is low. We propose a finite duration method in this paper and build up mathematical models to describe user behaviors like channel surfing to evaluate the performance of channel switch delay. We find through analysis and simulation that our method is well balanced in performance and cost. In a typical situation, the delay can be reduced to less than 30%.","PeriodicalId":137660,"journal":{"name":"2008 4th IEEE International Conference on Circuits and Systems for Communications","volume":"136 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123587017","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
Multilevel Coding with a Class of Decomposable Finite-Geometry LDPC Codes 一类可分解有限几何LDPC码的多级编码
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.16
Ya Liu, Hui-fang Chen, Lei Xie, Ming Gao
{"title":"Multilevel Coding with a Class of Decomposable Finite-Geometry LDPC Codes","authors":"Ya Liu, Hui-fang Chen, Lei Xie, Ming Gao","doi":"10.1109/ICCSC.2008.16","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.16","url":null,"abstract":"This paper proposes a class of decomposable LDPC codes based on finite geometry EG(m, ps) over bandlimited AWGN channel. These LDPC codes defined as the origin LDPC codes are decomposed into a few small LDPC codes as component codes in multilevel coding. It is shown that the origin LDPC codes demand generic M-ary Min-Sum algorithm while the component codes only require a few binary Min-Sum algorithm implementations in multi-stages decoding. The method proposed simplifies the decoding complexity.","PeriodicalId":137660,"journal":{"name":"2008 4th IEEE International Conference on Circuits and Systems for Communications","volume":"275 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122686815","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
Prediction for Wireless Traffic with Long Range Burstiness 具有长程突发的无线业务预测
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.104
Yong Wen, Guangxi Zhu, C. Xie
{"title":"Prediction for Wireless Traffic with Long Range Burstiness","authors":"Yong Wen, Guangxi Zhu, C. Xie","doi":"10.1109/ICCSC.2008.104","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.104","url":null,"abstract":"Recently many studies have found that the self-similarity in nature brings about the long range burstiness of the traffic across the wide range of time scales. The updated experimental evidences reveal that the heavy tailness is the key cause for the self-similar of the network traffic. Future fourth-generation (4G) wireless networks will be characterized by a 3G core network architecture. The multimedia services will be provided to mobile users, the 3G core network will have to support aggregated traffics, exhibiting long range dependent (LRD) and self-similar characteristics, as it occurs in the Internet. We deal with a forecasting method melding three predictors including autoregressive (AR), moving average (MA) and fractional autoregressive integrated moving average (FARIMA) based on alpha-stable innovation for the wireless traffic with long range burstiness according to the minimum dispersion criteria with infinite variance. The final predicted values are obtained by combining the previous three individual predicted values. The predicted results for the actual traces show that the three individual predictors are precise and effective, the last compound predictors can enhance the final predicted accuracy.","PeriodicalId":137660,"journal":{"name":"2008 4th IEEE International Conference on Circuits and Systems for Communications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129568665","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: 5
A Novel Authentication Architecture for Grid Security 一种新的网格安全认证体系结构
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.27
Mingyuan Yu, Haibo Yang, Ronghua Liang, Yahong Hu
{"title":"A Novel Authentication Architecture for Grid Security","authors":"Mingyuan Yu, Haibo Yang, Ronghua Liang, Yahong Hu","doi":"10.1109/ICCSC.2008.27","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.27","url":null,"abstract":"The grid security infrastructure (GSI) has been accepted as the primary authentication mechanism for the Grid. However the efficiency of the grid system is still required improvement because exchanging certificates and verifying validity are compulsory in the authentication procedure. In this paper, we propose a novel authentication architecture for grid Security (AAGS), which adopts seeded secret key and combine key technique and employs the features of conic curves over the residue class ring Zn into the authentication security, and we give precise definitions of the grid infrastructural protocols for AAGS. Compared with the SAP (SSL Authentication Protocol) in the GSI, AAGS is more efficient and convenient for its implementation, which contributes to the larger grid scalability and may be regarded as an optimized authentication approach of the grid security infrastructure.","PeriodicalId":137660,"journal":{"name":"2008 4th IEEE International Conference on Circuits and Systems for Communications","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128730165","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 CMOS LNA with Noise Cancellation for 3.1-10.6 GHz UWB Receivers Using Current-Reuse Configuration 基于电流复用配置的3.1-10.6 GHz UWB接收机降噪CMOS LNA
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.180
Feng Lu, Lei Xia
{"title":"A CMOS LNA with Noise Cancellation for 3.1-10.6 GHz UWB Receivers Using Current-Reuse Configuration","authors":"Feng Lu, Lei Xia","doi":"10.1109/ICCSC.2008.180","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.180","url":null,"abstract":"For the matching devices fix the gain of the latter stage, elementary noise canceling LNAs suffer inferior global power gain. In contrast, this paper presents an ultra-wideband 3.1-10.6 GHz low noise amplifier, which can save more power, contribute lower noise figure and provide higher gain by using a noise-canceling technique, current reuse and a single on-chip transformer. The amplifier is implemented in 0.18- mum CMOS technology, and the IC prototype exhibits a small signal gain of 16.3 dB over a -3 dB bandwidth of 3.5-10.4 GHz, and a noise figure of 3.9-5.8 dB in the entire UWB band. The LNA consumes 12.9 mW from a 1.8 V power supply and only has 1.4 mm2 die area.","PeriodicalId":137660,"journal":{"name":"2008 4th IEEE International Conference on Circuits and Systems for Communications","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130632792","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: 10
A Video Frame Indexing Based Frame Select Method 基于视频帧索引的帧选择方法
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.135
Sun Chao, L. Yukun, Jiang Shou-da
{"title":"A Video Frame Indexing Based Frame Select Method","authors":"Sun Chao, L. Yukun, Jiang Shou-da","doi":"10.1109/ICCSC.2008.135","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.135","url":null,"abstract":"In order to solve the precision guidance problem in television guidance missile system which is caused by time difference between the video frame used by the console and the video frame used by the guided missile. This paper proposes a novel video frame indexing based frame select method for television guidance system. By storing previous video frames and recording their indexing numbers, the same frame can be achieved on both the console and the guided missile. Compare with common selecting method, the proposed method can generate the tracking images more precisely.","PeriodicalId":137660,"journal":{"name":"2008 4th IEEE International Conference on Circuits and Systems for Communications","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124059527","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
Accurate Time-Delay Estimation and Alignment for RF Power Amplifier/Transmitter Characterization 射频功率放大器/发射机特性的精确时延估计和校准
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.22
Taijun Liu, Yan Ye, Xingbin Zeng, F. Ghannouchi
{"title":"Accurate Time-Delay Estimation and Alignment for RF Power Amplifier/Transmitter Characterization","authors":"Taijun Liu, Yan Ye, Xingbin Zeng, F. Ghannouchi","doi":"10.1109/ICCSC.2008.22","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.22","url":null,"abstract":"This paper presents a cross-covariance-based time- delay estimation method for accurate determination of the time- delay between the input and the output of a RF power amplifier/transmitter. In order to overcome the time resolution limitation caused by the relative low sampling rate of the analog- to-digital converter in the baseband signal acquisition system, the Lagrange interpolation is utilized to improve the time resolution. A two-step method for time-delay estimation/alignment is proposed to increase the dynamic range for time-delay estimation/alignment under the certain computation resource consumption condition. The experimental validation results have been provided to illustrate the effectiveness of the proposed approach for accurate time-delay estimation and alignment.","PeriodicalId":137660,"journal":{"name":"2008 4th IEEE International Conference on Circuits and Systems for Communications","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124160541","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: 19
Design and Implementation of a High-Speed Reconfigurable Feedback Shift Register 高速可重构反馈移位寄存器的设计与实现
2008 4th IEEE International Conference on Circuits and Systems for Communications Pub Date : 2008-05-26 DOI: 10.1109/ICCSC.2008.79
Z. Dai, Wei Li, Tao Chen, Qiao Ren
{"title":"Design and Implementation of a High-Speed Reconfigurable Feedback Shift Register","authors":"Z. Dai, Wei Li, Tao Chen, Qiao Ren","doi":"10.1109/ICCSC.2008.79","DOIUrl":"https://doi.org/10.1109/ICCSC.2008.79","url":null,"abstract":"A high-performance and dynamic reconfigurable feedback shift register is presented, which provides full support to linear and nonlinear feedback shift register. The architecture can be also reconfigured any lengths, feedback taps and feedback function. To save the hardware cost and get shorter critical path, we proposed EXCLUSIVE-OR tree network to implement linear feedback function, and put forward AND-OR tree network to optimize nonlinear feedback function. The design has been realized using Altera's FPGA. Synthesis, placement and routing of reconfigurable design have accomplished on 0.18 mum CMOS process. The result proves that the propagation time of reconfigurable feedback shift register with 256 lengths is 3.28ns. Compared with other designs, the architecture can achieve relatively high flexibility, furthermore, it has an obvious advantage in the aspect of speed.","PeriodicalId":137660,"journal":{"name":"2008 4th IEEE International Conference on Circuits and Systems for Communications","volume":"24 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132467858","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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