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The 2011 International Conference on Advanced Technologies for Communications (ATC 2011)最新文献

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No-zero-entry STBC scheme of achieving full diversity with linear receiver 用线性接收机实现全分集的无零输入STBC方案
The 2011 International Conference on Advanced Technologies for Communications (ATC 2011) Pub Date : 2011-09-26 DOI: 10.1109/ATC.2011.6027469
Van-Bien Pham, Weixing Sheng, Xiaofeng Ma, Hao Wang
{"title":"No-zero-entry STBC scheme of achieving full diversity with linear receiver","authors":"Van-Bien Pham, Weixing Sheng, Xiaofeng Ma, Hao Wang","doi":"10.1109/ATC.2011.6027469","DOIUrl":"https://doi.org/10.1109/ATC.2011.6027469","url":null,"abstract":"Recently, Zhang-Liu-Wong introduced Toeplitz codes and showed that Toeplitz codes achieve full diversity when a linear receiver, zero-forcing (ZF) or minimum mean square error (MMSE) receiver, is used. Unfortunately, Toeplitz codes suffer from large numbers of zeros. The zeros in the design result in high peak-to-average power ratio (PAPR) and also impose a severe constraint on hardware implementation of the code when turning off some of the transmitting antennas whenever a zero is transmitted. This motivates us to design full diversity STBCs having all its entries non-zero for linear receivers. As a result, our proposed codes not only have lower PAPR, but also easier implementation than Toeplitz codes. Moreover, simulation results also show that our codes outperform Toeplitz codes under peak power constraint while performing the same under average power constraint.","PeriodicalId":221905,"journal":{"name":"The 2011 International Conference on Advanced Technologies for Communications (ATC 2011)","volume":"159 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115954018","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 study on hierarchical side information generation structure in Distributed Video Coding 分布式视频编码中分层边信息生成结构的研究
The 2011 International Conference on Advanced Technologies for Communications (ATC 2011) Pub Date : 2011-09-26 DOI: 10.1109/ATC.2011.6027434
Xiem HoangVan, B. Jeon, Yung-Lyul Lee
{"title":"A study on hierarchical side information generation structure in Distributed Video Coding","authors":"Xiem HoangVan, B. Jeon, Yung-Lyul Lee","doi":"10.1109/ATC.2011.6027434","DOIUrl":"https://doi.org/10.1109/ATC.2011.6027434","url":null,"abstract":"Side Information generation is one of major problems in Distributed Video Coding (DVC). This can be performed by motion compensated temporal interpolation (MCTI) between two closest key frames. However, when temporal distance between the key frames increases, its linear interpolation becomes less effective. This paper introduces a hierarchical side information generation structure applicable to DVC with long Group of Picture (GOP) sizes in mind. Moreover, two quantization parameter control techniques are proposed. Experimental results verify efficiency of the proposed algorithms.","PeriodicalId":221905,"journal":{"name":"The 2011 International Conference on Advanced Technologies for Communications (ATC 2011)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128458609","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
Compact microstrip dual-band bandpass filter using short-stub loaded half-wavelength resonator 紧凑的微带双带带通滤波器，采用短段负载半波长谐振器
The 2011 International Conference on Advanced Technologies for Communications (ATC 2011) Pub Date : 2011-09-26 DOI: 10.1109/ATC.2011.6027467
MinhTan Doan, W. Che
{"title":"Compact microstrip dual-band bandpass filter using short-stub loaded half-wavelength resonator","authors":"MinhTan Doan, W. Che","doi":"10.1109/ATC.2011.6027467","DOIUrl":"https://doi.org/10.1109/ATC.2011.6027467","url":null,"abstract":"A compact microstrip dual-band bandpass filter (BPF) using short-stub loaded half-wavelength resonator is proposed in this paper. By tuning the length and width of short-stub and half-wavelength line, two center frequencies can be easily adjusted to the desired value. Furthermore, new structure of couple-line is introduced to satisfy desired external coupling degree for each band. In this way, the bandwidths of this filter are controllable, while taking good selectivity and improved upper-stopband performance. Two passbands are designed to operate at 2.4 GHz and 3.5 GHz, respectively. A prototype of dual-band bandpass filter is designed and fabricated for demonstration, good agreement is observed between the measured and the theoretical expectation.","PeriodicalId":221905,"journal":{"name":"The 2011 International Conference on Advanced Technologies for Communications (ATC 2011)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131761207","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
MR image denoising using nonlinear regression and Fuzzy C-Means clustering 基于非线性回归和模糊c均值聚类的MR图像去噪
The 2011 International Conference on Advanced Technologies for Communications (ATC 2011) Pub Date : 2011-09-26 DOI: 10.1109/ATC.2011.6027479
D. Trinh, M. Luong, J. Rocchisani, C. Pham, F. Dibos, Linh-Trung Nguyen
{"title":"MR image denoising using nonlinear regression and Fuzzy C-Means clustering","authors":"D. Trinh, M. Luong, J. Rocchisani, C. Pham, F. Dibos, Linh-Trung Nguyen","doi":"10.1109/ATC.2011.6027479","DOIUrl":"https://doi.org/10.1109/ATC.2011.6027479","url":null,"abstract":"Magnetic Resonance (MR) imaging is useful for medical diagnosis. However, MR images are often corrupted by Rician noise, leading to undesirable visual quality. Based on the fact that many images can be acquired at nearly the same location, this paper proposes a novel learning method for the reduction of Rician noise using nonlinear ridge regression with a training set established from a set of given standard images. In addition, Fuzzy C-Means (FCM) is used for the classification of the training set. Experimental results show that our method outperforms some state-of-the-art methods.","PeriodicalId":221905,"journal":{"name":"The 2011 International Conference on Advanced Technologies for Communications (ATC 2011)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126639636","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 compact UWB antenna with dual band-notched characteristics using viahole structure 一种紧凑的超宽带天线，具有双带陷波特性，采用过孔结构
The 2011 International Conference on Advanced Technologies for Communications (ATC 2011) Pub Date : 2011-09-26 DOI: 10.1109/ATC.2011.6027485
V. H. Nguyen, T. Maeda
{"title":"A compact UWB antenna with dual band-notched characteristics using viahole structure","authors":"V. H. Nguyen, T. Maeda","doi":"10.1109/ATC.2011.6027485","DOIUrl":"https://doi.org/10.1109/ATC.2011.6027485","url":null,"abstract":"In this paper, a viahole structure is applied to realize dual band-notched characteristic in a compact planar monopole antenna for ultrawide band (UWB) applications. The proposed antenna consists of a modified radiating patch element and a ground plane. Three patches are etched on the back of the antenna and connected to the main patch by series of via holes to realize the WiMAX 3.5 GHz notched band and the WLAN 5.5 GHz notched band. The simulation and measurement show that the proposed antenna achieves an impedance bandwidth of 3.1–10.6 GHz with VSWR<2, except the bandwidths of WiMAX and WLAN. A nearly omnidirectional radiation pattern and stable gain are also obtained except in the notched bands.","PeriodicalId":221905,"journal":{"name":"The 2011 International Conference on Advanced Technologies for Communications (ATC 2011)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114629385","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
Error analysis and precision estimation for floating-point dot-products using affine arithmetic 基于仿射算法的浮点点积误差分析与精度估计
The 2011 International Conference on Advanced Technologies for Communications (ATC 2011) Pub Date : 2011-09-26 DOI: 10.1109/ATC.2011.6027495
T. Huynh, M. Mucke
{"title":"Error analysis and precision estimation for floating-point dot-products using affine arithmetic","authors":"T. Huynh, M. Mucke","doi":"10.1109/ATC.2011.6027495","DOIUrl":"https://doi.org/10.1109/ATC.2011.6027495","url":null,"abstract":"One challenging task for VLSI and reconfigurable system design is the identification of the smallest number format possible to implement a given numerical algorithm guaranteeing some final accuracy while minimising area used, execution time and power. We apply affine arithmetic, an extension to interval arithmetic, to estimate the rounding error of different floating-point dot-product variants. The validity of the estimated error bounds is demonstrated using extensive simulations. We derive the analytical models for rounding errors over a wide range of parameters and show that affine arithmetic with a probabilistic bounding operator is able to provide a tighter bound compared to conventional forward error analysis. Due to the tight bounds, minimum mantissa bit width for hardware implementation can be determined and comparison of different dot-product variants is possible. Our presented models allow for an efficient design space exploration and are key to specialised code generators.","PeriodicalId":221905,"journal":{"name":"The 2011 International Conference on Advanced Technologies for Communications (ATC 2011)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114791532","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
Frequency offset compensation for crystal-free 802.15.4 communication 频率偏移补偿晶体无802.15.4通信
The 2011 International Conference on Advanced Technologies for Communications (ATC 2011) Pub Date : 2011-09-26 DOI: 10.1109/ATC.2011.6027432
A. M. Mehta, K. Pister
{"title":"Frequency offset compensation for crystal-free 802.15.4 communication","authors":"A. M. Mehta, K. Pister","doi":"10.1109/ATC.2011.6027432","DOIUrl":"https://doi.org/10.1109/ATC.2011.6027432","url":null,"abstract":"The IEEE 802.15.4 standard is widely used in low power wireless sensor networks. Providing 250kbps raw data band-width, its physical layer (PHY) mandates tight constraints on the RF carrier frequency, calling for an absolute accuracy of ±40 ppm. This specification necessitates the use of a crystal timing reference, thus requiring design of a multi-component PCB to implement any 802.15.4 compliant solution. However, in this work, a proposed frequency compensation algorithm can be added to the 802.15.4 PHY layer to relax the requirements on a timing reference to up to ±1000 ppm relative frequency error between a transmitter and receiver, allowing for the elimination of the crystal and paving the way for a single-chip integrated 802.15.4 wireless node. A wide bandwidth channel-select filter allows for offset in the received signal carrier frequency, while an additional demodulator output estimates that frequency offset. An adaptive feedback loop can then adjust the receiver clock rate to center the received signal in the channel, following which a narrowband filter can be applied to restore noise performance. Such a system has been simulated, and the results presented in this work demonstrate the feasibility of standards-compliant wireless communication using inaccurate timing references.","PeriodicalId":221905,"journal":{"name":"The 2011 International Conference on Advanced Technologies for Communications (ATC 2011)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123825566","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: 12
Down-Sized decoding of H.264/AVC with low decoding complexity H.264/AVC压缩解码，解码复杂度低
The 2011 International Conference on Advanced Technologies for Communications (ATC 2011) Pub Date : 2011-09-26 DOI: 10.1109/ATC.2011.6027435
Luong Pham Van, Hoyoung Lee, Jaehwan Kim, B. Jeon
{"title":"Down-Sized decoding of H.264/AVC with low decoding complexity","authors":"Luong Pham Van, Hoyoung Lee, Jaehwan Kim, B. Jeon","doi":"10.1109/ATC.2011.6027435","DOIUrl":"https://doi.org/10.1109/ATC.2011.6027435","url":null,"abstract":"In this paper, we propose a method for down-sized decoding of H.264/AVC with low decoding complexity. The method extracts the DC values of blocks in reconstructed pictures without full decoding. The DC values are divided by 4 to make the down-sized pictures of reconstructed frames. For intra-coded blocks, the intra prediction mode of a block and DC values of neighboring blocks are used to obtain DC value of the block. The motion compensation (MC) is modified to obtain DC value of an inter-coded block by referring to DC values of reference pictures. Experimental results show that the decoding complexity can be reduced up to 77% while maintaining the acceptable subjective quality for down-sized images.","PeriodicalId":221905,"journal":{"name":"The 2011 International Conference on Advanced Technologies for Communications (ATC 2011)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115172771","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
Comparison between DFT- and DWT-based speech/non-speech detection for adverse environments 不利环境下基于DFT和基于dwt的语音/非语音检测的比较
The 2011 International Conference on Advanced Technologies for Communications (ATC 2011) Pub Date : 2011-09-26 DOI: 10.1109/ATC.2011.6027490
T. V. Pham, G. Kubin
{"title":"Comparison between DFT- and DWT-based speech/non-speech detection for adverse environments","authors":"T. V. Pham, G. Kubin","doi":"10.1109/ATC.2011.6027490","DOIUrl":"https://doi.org/10.1109/ATC.2011.6027490","url":null,"abstract":"The goal of this paper is to evaluate the wavelet/frequency-based voice activity detection (VAD) algorithms under harsh conditions. A new frequency-based speech classifier has been developed based on a single subband distance feature in cooperating with adaptive percentile filter. Experimental results in clean, noisy and reverberant environments are provided. Results show that: (i) the group of algorithms exploiting the subband power distance feature mostly outperforms the state-of-the-art VAD standardized for the G. 729 B, the ETSI AFE ES 202 050 in terms of classification measures; (ii) the robustness of the model-based VAD methods still holds in a completely mismatched reverberant environment.","PeriodicalId":221905,"journal":{"name":"The 2011 International Conference on Advanced Technologies for Communications (ATC 2011)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129077971","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
Multicarrier Cognitive Radio system configuration based on interference analysis by two dimensional Genetic Algorithm 基于二维遗传算法干扰分析的多载波认知无线电系统配置
The 2011 International Conference on Advanced Technologies for Communications (ATC 2011) Pub Date : 2011-09-26 DOI: 10.1109/ATC.2011.6027441
Chuyen Khoa Huynh, W. Lee
{"title":"Multicarrier Cognitive Radio system configuration based on interference analysis by two dimensional Genetic Algorithm","authors":"Chuyen Khoa Huynh, W. Lee","doi":"10.1109/ATC.2011.6027441","DOIUrl":"https://doi.org/10.1109/ATC.2011.6027441","url":null,"abstract":"This paper proposes the method that applies Genetic Algorithm (GA) to Cognitive Radio (CR) system. Because of optimization purpose, a two-dimensional structure is used for chromosome's implementation. Combined with Fitness Objective Evaluation (FOE) standard, two kinds of GA are considered: Conventional GA (CGA) applied with multi-objective fitness approach and Non-dominated Sorting GA (NSGA) with Pareto-optimal sorting fronts. These kinds of GA's implementation will show a good view about the performance of CR engine in the process to find out the optimal solution. In order to enable dynamic spectrum access (DSA), this approach will attempt to minimize power consumption, transmission error, and interference caused by a radio wireless system.","PeriodicalId":221905,"journal":{"name":"The 2011 International Conference on Advanced Technologies for Communications (ATC 2011)","volume":"174 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115988987","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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