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2012 IEEE Workshop on Signal Processing Systems最新文献

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Energy-Adaptive Modulation for RF Power Management under Renewable Energy 可再生能源下射频功率管理的能量自适应调制
2012 IEEE Workshop on Signal Processing Systems Pub Date : 2012-10-17 DOI: 10.1109/SiPS.2012.28
Junlin Chen, Jun-hong Cui, Lei Wang
{"title":"Energy-Adaptive Modulation for RF Power Management under Renewable Energy","authors":"Junlin Chen, Jun-hong Cui, Lei Wang","doi":"10.1109/SiPS.2012.28","DOIUrl":"https://doi.org/10.1109/SiPS.2012.28","url":null,"abstract":"This paper presents a new power management technique for RF circuits powered by renewable energy sources. Different from conventional systems, the performance of self-powered RF circuits is largely constrained by two factors: time-varying fading channel conditions and non-deterministic renewable energy levels. The proposed technique dynamically adjusts the base band modulation scheme to deal with these two factors in a coherent manner in order to maximize the data rate of RF circuits. Some practical issues, such as battery aging, have been investigated. The proposed technique is shown to be robust and insensitive to these issues. Simulation results demonstrate that the proposed technique outperforms conventional approaches based on fixed modulation schemes under various conditions.","PeriodicalId":286060,"journal":{"name":"2012 IEEE Workshop on Signal Processing Systems","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121951153","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: 17
A Low-Complexity Grouping FFT-Based Codebook Searching Algorithm in LTE System LTE系统中基于fft的低复杂度分组码本搜索算法
2012 IEEE Workshop on Signal Processing Systems Pub Date : 2012-10-17 DOI: 10.1109/SiPS.2012.19
Yi-Hsuan Lin, Cheng-Zhou Zhan, Chun-Yuan Chu, A. Wu
{"title":"A Low-Complexity Grouping FFT-Based Codebook Searching Algorithm in LTE System","authors":"Yi-Hsuan Lin, Cheng-Zhou Zhan, Chun-Yuan Chu, A. Wu","doi":"10.1109/SiPS.2012.19","DOIUrl":"https://doi.org/10.1109/SiPS.2012.19","url":null,"abstract":"The codebook-based precoding is an effective technique to enhance the performance of LTE system over a limited-bandwidth feedback link. Among various precoder selection criteria, only mutual information selection criterion (MI-SC) and bit error rate selection criterion (BER-SC) are applicable to the codebook which is essential for the maximum number of transmitted data streams transmission, i.e. square codebook. However, MI-SC and BER-SC are computationally intensive when the number of transmit antennas and the number of sub streams are largest in LTE system. In this paper, we propose a low-complexity grouping FFT-based precoder selection criterion which is suitable for square codebook. We use the relation of precoding matrices to partition LTE codebook, and the FFT scheme is utilized to reduce the number of matrix inversions and matrix multiplications. The complexity analysis shows that the proposed scheme is able to reduce about 80% computational complexity without any performance loss compared with direct implementation and low-complexity cofactor scheme [10].","PeriodicalId":286060,"journal":{"name":"2012 IEEE Workshop on Signal Processing Systems","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125634456","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
Multidimensional Dataflow Graph Modeling and Mapping for Efficient GPU Implementation 高效GPU实现的多维数据流图建模和映射
2012 IEEE Workshop on Signal Processing Systems Pub Date : 2012-10-17 DOI: 10.1109/SiPS.2012.10
Lai-Huei Wang, Chung-Ching Shen, G. Seetharaman, K. Palaniappan, S. Bhattacharyya
{"title":"Multidimensional Dataflow Graph Modeling and Mapping for Efficient GPU Implementation","authors":"Lai-Huei Wang, Chung-Ching Shen, G. Seetharaman, K. Palaniappan, S. Bhattacharyya","doi":"10.1109/SiPS.2012.10","DOIUrl":"https://doi.org/10.1109/SiPS.2012.10","url":null,"abstract":"Multidimensional synchronous dataflow (MDSDF) provides an effective model of computation for a variety of multidimensional DSP systems that have static dataflow structures. In this paper, we develop new methods for optimized implementation of MDSDF graphs on embedded platforms that employ multiple levels of parallelism to enhance performance at different levels of granularity. Our approach allows designers to systematically represent and transform multi-level parallelism specifications from a common, MDSDF-based application level model. We demonstrate our methods with a case study of image histogram implementation on a graphics processing unit (GPU). Experimental results from this study show that our approach can be used to derive fast GPU implementations, and enhance trade-off analysis during design space exploration.","PeriodicalId":286060,"journal":{"name":"2012 IEEE Workshop on Signal Processing Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129227313","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
On the Trade-Off of Accuracy and Computational Complexity for Classifying Normal and Abnormal ECG in Remote CVD Monitoring Systems CVD远程监测系统中心电正常与异常分类准确率与计算复杂度的权衡
2012 IEEE Workshop on Signal Processing Systems Pub Date : 2012-10-17 DOI: 10.1109/SiPS.2012.43
Taihai Chen, E. Mazomenos, K. Maharatna, S. Dasmahapatra, M. Niranjan
{"title":"On the Trade-Off of Accuracy and Computational Complexity for Classifying Normal and Abnormal ECG in Remote CVD Monitoring Systems","authors":"Taihai Chen, E. Mazomenos, K. Maharatna, S. Dasmahapatra, M. Niranjan","doi":"10.1109/SiPS.2012.43","DOIUrl":"https://doi.org/10.1109/SiPS.2012.43","url":null,"abstract":"Remote cardiovascular disease monitoring systems are characterised from a limited number of available leads and limited processing capabilities. In this paper, we investigate the trade-off between accuracy and computational complexity in order to derive the best strategy for classifying the ECG signal into normal or abnormal in such systems, with the spectral energy contained in the constituent waves of the ECG signal, as the primary feature for classification. Five established classifiers are considered and through exhaustive simulations the maximum accuracy is derived for each classifier. Based on 104 ECG records, we present a systematic analysis of the tradeoff between computational complexity and accuracy, which allow us to deduce the best classification strategy considering only a small number of available leads.","PeriodicalId":286060,"journal":{"name":"2012 IEEE Workshop on Signal Processing Systems","volume":"48 11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121191423","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: 15
A Generic Framework for Optimizing Digital Intensive Harmonic Rejection Receivers 一种优化数字强化谐波抑制接收机的通用框架
2012 IEEE Workshop on Signal Processing Systems Pub Date : 2012-10-17 DOI: 10.1109/SiPS.2012.40
Chunshu Li, Min Li, M. Verhelst, A. Bourdoux, J. Borremans, S. Pollin, A. Chiumento, L. Perre, R. Lauwereins
{"title":"A Generic Framework for Optimizing Digital Intensive Harmonic Rejection Receivers","authors":"Chunshu Li, Min Li, M. Verhelst, A. Bourdoux, J. Borremans, S. Pollin, A. Chiumento, L. Perre, R. Lauwereins","doi":"10.1109/SiPS.2012.40","DOIUrl":"https://doi.org/10.1109/SiPS.2012.40","url":null,"abstract":"Due to the use of switching down converters, harmonic down mixing in wideband wireless application causes distortion to the desired signal. This paper studies this problem with a multi-path down mixing method, which currently is a hot research topic. Digital intensive recombination is proposed fort he first time, in contrast to the traditional \"analog recombination\"scheme which suffers from the limited harmonic rejection performance due to mismatch among different paths and inaccuracy of scaling factors. A generic framework with mathematical model description is presented in this paper for digital intensive optimization of multi-path harmonic rejection scheme. A mathematical derivation to optimize a generic case with N paths and aiming at rejecting up to the Mth order harmonics is proposed. Additionally, we present an optimal solution to achieve the best harmonic rejection performance for a generic case based on least squares criterion. Specific cases, three and four paths to reject up to the fifth-order harmonics are studied using the proposed mathematical framework. The results show that, theoretically, 18.12dB and complete harmonic rejection can be achieved for three and four paths respectively, which provide mathematical proof for existing multi-path harmonic rejection solutions.","PeriodicalId":286060,"journal":{"name":"2012 IEEE Workshop on Signal Processing Systems","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127533910","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
Optimal Channel Coding for Scalable Wireless Transmission of 3D Regions of Interest in 3D Medical Images 三维医学图像中三维感兴趣区域可扩展无线传输的最佳信道编码
2012 IEEE Workshop on Signal Processing Systems Pub Date : 2012-10-17 DOI: 10.1109/SiPS.2012.47
Victor Sanchez
{"title":"Optimal Channel Coding for Scalable Wireless Transmission of 3D Regions of Interest in 3D Medical Images","authors":"Victor Sanchez","doi":"10.1109/SiPS.2012.47","DOIUrl":"https://doi.org/10.1109/SiPS.2012.47","url":null,"abstract":"A novel method for 3D scalable medical image coding with optimized 3D region of interest (3D-RoI) coding was recently proposed. This paper presents one major contribution that enhances this previous work, namely an optimal channel coding method for scalable wireless transmission of 3D regions of interest in 3D medical images. The method is presented in the context of telemedicine, where 3D medical images are first source-coded for storage on a central server and later channel-coded, when request for transmission of a 3D-RoI is initiated. The method is a two-tiered approach: Tier-1 is a source coding scheme, while Tier-2 is a joint source/channel coding scheme where 3D-RoI coding is jointly performed with channel coding. The robustness of the proposed method is evaluated over Rayleigh-fading channels with rate-compatible punctured turbo codes. Comparisons are made with the cases of equal error protection and unequal error protection. Evaluations results on real 3D medical images show a significant improvement in reconstruction quality of the received images, in terms of the average peak signal-to-noise ratio.","PeriodicalId":286060,"journal":{"name":"2012 IEEE Workshop on Signal Processing Systems","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116850421","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 the Complexity of Orthogonal Code Based Synthetic Aperture Ultrasound System 降低正交码合成孔径超声系统的复杂度
2012 IEEE Workshop on Signal Processing Systems Pub Date : 2012-10-17 DOI: 10.1109/SiPS.2012.44
Ming Yang, Siyuan Wei, C. Chakrabarti
{"title":"Reducing the Complexity of Orthogonal Code Based Synthetic Aperture Ultrasound System","authors":"Ming Yang, Siyuan Wei, C. Chakrabarti","doi":"10.1109/SiPS.2012.44","DOIUrl":"https://doi.org/10.1109/SiPS.2012.44","url":null,"abstract":"In this paper, we propose several techniques to reduce the computation complexity of orthogonal chirp and orthogonal Golay code based synthetic aperture ultrasound systems. First, we minimize the complexity in terms of number of effective multiplications by choosing the system parameters for a specified SNR gain. The proposed method helps in reducing the complexity by about 20. Next, we consider a system that compensates for body motion. We reduce the complexity of motion compensation first by doing the calculations in polar domain, and second, by making use of the correlation in motion velocity field in a small neighborhood. These approximations reduce the computation complexity by3000 with minimal performance penalty.","PeriodicalId":286060,"journal":{"name":"2012 IEEE Workshop on Signal Processing Systems","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116887645","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
A Dedicated Approach to Explore Design Space for Hardware Architecture of Turbo Decoders 探索Turbo解码器硬件架构设计空间的专用方法
2012 IEEE Workshop on Signal Processing Systems Pub Date : 2012-10-17 DOI: 10.1109/SiPS.2012.18
O. Sanchez, M. Jézéquel, S. Rehman, Awais Sani, C. Chavet, P. Coussy, C. Jégo
{"title":"A Dedicated Approach to Explore Design Space for Hardware Architecture of Turbo Decoders","authors":"O. Sanchez, M. Jézéquel, S. Rehman, Awais Sani, C. Chavet, P. Coussy, C. Jégo","doi":"10.1109/SiPS.2012.18","DOIUrl":"https://doi.org/10.1109/SiPS.2012.18","url":null,"abstract":"Parallel turbo decoding techniques to achieve high throughput have been extensively investigated in the literature. These techniques are commonly combined. In this case, the impact on the hardware complexity and on the throughput is usually only accurately determined at the end of the design process. Thus, the time to market is penalized and the probability of designing a sub optimal system increases. In this paper we address this problem by introducing a dedicated approach to efficiently explore the design space of parallel turbo decoder architectures. Using this approach, a tradeoff between the hardware complexity and the throughput can be established in the early stages of the architecture design process. Our approach considers especially memory conflict issues, as well as Soft-Input Soft-Output decoder architectures.","PeriodicalId":286060,"journal":{"name":"2012 IEEE Workshop on Signal Processing Systems","volume":"88 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133322930","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
On Low Power Fractional Motion Estimation Algorithms for H.264 H.264低功耗分数运动估计算法研究
2012 IEEE Workshop on Signal Processing Systems Pub Date : 2012-10-17 DOI: 10.1109/SiPS.2012.64
T. Ogunfunmi, O. Ndili, Pavel Arnaudov
{"title":"On Low Power Fractional Motion Estimation Algorithms for H.264","authors":"T. Ogunfunmi, O. Ndili, Pavel Arnaudov","doi":"10.1109/SiPS.2012.64","DOIUrl":"https://doi.org/10.1109/SiPS.2012.64","url":null,"abstract":"Motion estimation in H.264/AVC, is done in two parts - integer-pel motion estimation, and fractional-pel motion estimation. In the past, we have proposed new algorithms and architectures for integer-pel motion estimation. In this paper, we propose an efficient, low power algorithm and its co-designed VLSI architecture for fractional-pel motion estimation in H.264/AVC. We use a simplified FIR filter for half-pel interpolation. Usage of this filter reduces the required number of computations and the memory size and bandwidth for half-pel interpolation. Simulations are used to compare our algorithm with the state-of-the-art, in terms of rate-distortion performance and computational complexity. Our results show that our algorithm on average has better rate-distortion performance, compared to previous state-of-the-art fractional-pel ME algorithms, while its performance is comparable to fractional-pel ME in H.264/AVC.","PeriodicalId":286060,"journal":{"name":"2012 IEEE Workshop on Signal Processing Systems","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132465698","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
Energy and Performance Characterization of Mobile Heterogeneous Computing 移动异构计算的能量和性能表征
2012 IEEE Workshop on Signal Processing Systems Pub Date : 2012-10-17 DOI: 10.1109/SiPS.2012.61
Yi-Chu Wang, K. Cheng
{"title":"Energy and Performance Characterization of Mobile Heterogeneous Computing","authors":"Yi-Chu Wang, K. Cheng","doi":"10.1109/SiPS.2012.61","DOIUrl":"https://doi.org/10.1109/SiPS.2012.61","url":null,"abstract":"A modern mobile application processor is a heterogeneous multi-core SoC which integrates CPU and application-specific accelerators such as GPU and DSP. It provides opportunity to accelerate other compute-intensive applications, yet mapping an algorithm to such a heterogeneous platform is not a straightforward task and has many design decisions to make. In this paper, we evaluate the performance and energy benefits of utilizing the integrated GPU and DSP cores to offload or share CPU's compute-intensive tasks. The evaluation is conducted on three representative mobile platforms, TI's OMAP3530, Qualcomn's Snapdragon S2, and Nvidia's Tegra2, using common computation tasks in mobile applications. We identify key factors that should be considered in energy-optimized mobile heterogeneous computing. Our evaluation results show that, by effectively utilizing all the computing cores concurrently, an average of 3.7X performance improvement can be achieved with the cost of 33% more power consumption, in comparison with the case of utilizing CPU only. This stands for 2.8X energy saving.","PeriodicalId":286060,"journal":{"name":"2012 IEEE Workshop on Signal Processing Systems","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127171469","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
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