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A wideband adaptive delta modulator for digitalized video signal 一种用于数字视频信号的宽带自适应增量调制器
CSQRWC 2012 Pub Date : 2012-07-23 DOI: 10.1109/CSQRWC.2012.6295007
Liang-Chien Chu, Y. Cheng
{"title":"A wideband adaptive delta modulator for digitalized video signal","authors":"Liang-Chien Chu, Y. Cheng","doi":"10.1109/CSQRWC.2012.6295007","DOIUrl":"https://doi.org/10.1109/CSQRWC.2012.6295007","url":null,"abstract":"A wideband adaptive delta modulator for digitalized video signal application is presented. The signal process algorithm in this adaptive delta modulator is an accumulative adding “1” or accumulative subtracting “1” bit. The accumulative adding “1” bit is chosen when three consecutive 1s occurs. If three consecutive 0s appears, then accumulative subtracting “1” is chosen. Otherwise, step size □ unchanged. That is when three consecutive 1s or 0s of digitally encoded signal occur, the digital to analog converter gives the step size changed adaptively, otherwise it is unchanged. The proposed algorithm has the features of quite catching the transitions of signal, high stability, and simplified circuit implementation. Theses make high adaptive efficiency and suitable for video digital encoding applications.","PeriodicalId":250360,"journal":{"name":"CSQRWC 2012","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127048706","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
Analysis on the pattern distortions of Plate end-fire antenna array caused by mutual coupling 相互耦合引起的平板端火天线阵方向图畸变分析
CSQRWC 2012 Pub Date : 2012-07-23 DOI: 10.1109/CSQRWC.2012.6294985
Jia Cao, Z. Xue, Weiming Li, W. Ren, Xiaowen Xu
{"title":"Analysis on the pattern distortions of Plate end-fire antenna array caused by mutual coupling","authors":"Jia Cao, Z. Xue, Weiming Li, W. Ren, Xiaowen Xu","doi":"10.1109/CSQRWC.2012.6294985","DOIUrl":"https://doi.org/10.1109/CSQRWC.2012.6294985","url":null,"abstract":"In this paper, the far field pattern distortions of plate end-fire antenna array caused by mutual coupling were analyzed. The pattern distortions of two typical array forms were shown. And the ones of array arranged along the broadside direction were further discussed through the inter-space experiment and the surface current experiment. The relationship between array inter-space and distortion extent was quantitatively analyzed, and some surface current variation rules in array had been got.","PeriodicalId":250360,"journal":{"name":"CSQRWC 2012","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114886201","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
A Gilbert mixer with high gain for 18 GHz application 高增益的吉尔伯特混频器，适用于18 GHz
CSQRWC 2012 Pub Date : 2012-07-23 DOI: 10.1109/CSQRWC.2012.6294966
M. Her, C. Huang, Pao-Hsun Wu
{"title":"A Gilbert mixer with high gain for 18 GHz application","authors":"M. Her, C. Huang, Pao-Hsun Wu","doi":"10.1109/CSQRWC.2012.6294966","DOIUrl":"https://doi.org/10.1109/CSQRWC.2012.6294966","url":null,"abstract":"The aim of this paper is presented A Gilbert mixer with passive balun for 18 GHz application. It was used Taiwan Semiconductor provided by TSMC CMOS 0.18 μm process. We proposed mixer consists of Gilbert Cell, RF and LO stage matching and the IF buffer amplifier. Finally, at the operation voltage of Vdd = 1.8 V, RF frequency =18 GHz, LO frequency =17 GHz, the conversion gain is about 11.676 dB, input P1dB and power consumption are about -15 dBm and 54 mW. The chip size including all testing pads is 0.82 × 0.79 mm2.","PeriodicalId":250360,"journal":{"name":"CSQRWC 2012","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124123635","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
Design and particle-in-cell simulation of sub-terahertz extended interaction oscillator 亚太赫兹扩展相互作用振荡器的设计与粒子胞内仿真
CSQRWC 2012 Pub Date : 2012-07-23 DOI: 10.1109/CSQRWC.2012.6294974
Yong Zhong, Wenxin Liu, Yong Wang
{"title":"Design and particle-in-cell simulation of sub-terahertz extended interaction oscillator","authors":"Yong Zhong, Wenxin Liu, Yong Wang","doi":"10.1109/CSQRWC.2012.6294974","DOIUrl":"https://doi.org/10.1109/CSQRWC.2012.6294974","url":null,"abstract":"In this paper, a novel sub-terahertz (THz) extended interaction oscillator (EIO) is presented. With the help of a three-dimensional (3D) particle-in-cell (PIC) simulation, design and optimize geometry of THz EIO is performed, which is composed of ladder loaded rectangular waveguide. In present work, the operation center frequency of THz EIO is 95GHz, and the out power 2.0kW is achieved, the efficiency reaches 20.8%, which is operating at voltage and beam current is 16 kV and 0.6A, respectively.","PeriodicalId":250360,"journal":{"name":"CSQRWC 2012","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122520639","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
Tri-band filter using single stub loaded resonator 三带滤波器使用单短段负载谐振器
CSQRWC 2012 Pub Date : 2012-07-23 DOI: 10.1109/CSQRWC.2012.6294995
Fulong Chen, Jin Yin, Q. Chu
{"title":"Tri-band filter using single stub loaded resonator","authors":"Fulong Chen, Jin Yin, Q. Chu","doi":"10.1109/CSQRWC.2012.6294995","DOIUrl":"https://doi.org/10.1109/CSQRWC.2012.6294995","url":null,"abstract":"Tri-band bandpass filter using single open or short stub loaded resonators is presented in this paper. The second and the third resonant frequencies of the open stub loaded resonator can be flexibly controlled by tuning the length and impedance of the open stub, whereas the first resonant frequency is fixed. The first and the third resonant frequencies of the short stub loaded resonator can be flexibly controlled by tuning the length and impedance of the short stub, whereas the second resonant frequency is fixed. Two microstrip filters were designed and simulated, proving the concept in an excellent way. The prototype of the tri-band filters achieved insertion loss of 1.3, 1.7 and 1.5 dB at 2.4, 3.5, 5.8 GHz, 1.3, 0.8 and 1.3 dB at 1.57, 2.45, 5.2 GHz, respectively.","PeriodicalId":250360,"journal":{"name":"CSQRWC 2012","volume":"2309 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130327149","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
Parallelization of spectrum sensing algorithms using graphic processing units 使用图形处理单元的频谱感知算法的并行化
CSQRWC 2012 Pub Date : 2012-07-23 DOI: 10.1109/CSQRWC.2012.6294962
Chu-Han Lee, Chia-Jen Chang, Sao-Jie Chen
{"title":"Parallelization of spectrum sensing algorithms using graphic processing units","authors":"Chu-Han Lee, Chia-Jen Chang, Sao-Jie Chen","doi":"10.1109/CSQRWC.2012.6294962","DOIUrl":"https://doi.org/10.1109/CSQRWC.2012.6294962","url":null,"abstract":"Cognitive radio (CR) is the next-generation communication system with high spectrum utilization and efficiency. It is very crucial for CR to sense the environment spectrum holes quickly and accurately. In this paper, we implement two kinds of spectrum sensing algorithms: waveform-based detection and cyclostationary feature extraction methods. Both of these algorithms are capable to separate the signal of interest from the noise or interference. In order to lower the computation time required by these complex algorithms, we parallelize these algorithms on a Graphic Processing Unit (GPU). Our methods show up to an average of 30× speedup in waveform preamble detection and an average of 39× speedup in cyclostationary feature extraction on a NVIDIA GTS 450 compared with the sequential implementation on a 2.94GHz Intel Core 2 CPU.","PeriodicalId":250360,"journal":{"name":"CSQRWC 2012","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132648097","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
Miniature antenna for UWB applications 用于超宽带应用的微型天线
CSQRWC 2012 Pub Date : 2012-07-23 DOI: 10.1109/CSQRWC.2012.6294970
Chen Ming-Hung, Tien-Min Chuang
{"title":"Miniature antenna for UWB applications","authors":"Chen Ming-Hung, Tien-Min Chuang","doi":"10.1109/CSQRWC.2012.6294970","DOIUrl":"https://doi.org/10.1109/CSQRWC.2012.6294970","url":null,"abstract":"A low-cost, miniature-sized and isotropic Ultra-wideband (UWB) antenna is presented. In this paper, we will use a 3D EM simulator, HFSS, to design antenna. We employ exposure and development process to fabricate the miniature antenna, which is fed by a microstrip line and built on a FR-4 substrate with size of 22mm × 38mm2. Via measurement, the antenna's matching characteristics and radiation patterns were obtained. The frequency band designed by this study is from 3.1GHz to 10.6GHz, targeting for UWB applications. Return loss is under -10dB and the gain range of the antenna is from 2dBi to 3.3dBi in this frequency band. Meanwhile, radiation patterns comply with requirements.","PeriodicalId":250360,"journal":{"name":"CSQRWC 2012","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131978722","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
An efficient bit-flipping decoding algorithm for LDPC codes 一种高效的LDPC码翻转译码算法
CSQRWC 2012 Pub Date : 2012-07-23 DOI: 10.1109/CSQRWC.2012.6294975
Tso-Cho Chen
{"title":"An efficient bit-flipping decoding algorithm for LDPC codes","authors":"Tso-Cho Chen","doi":"10.1109/CSQRWC.2012.6294975","DOIUrl":"https://doi.org/10.1109/CSQRWC.2012.6294975","url":null,"abstract":"In this paper, a new method for improving hard-decision bit-flipping (BF) decoding is proposed for low-density parity-check codes. The flipping criterion is derived theoretically from the soft-decision belief-propagation decoding algorithm. The proposed BF decoding algorithm is channel independent and is improved by introducing a more efficient method for computing the reliability of the parity checks. Extensive simulations are provided to demonstrate the efficiency of the proposed algorithm. Simulation results show that the proposed algorithm can achieve about 1.5dB coding gain improvement at BER = 5×10-6 while reducing up to 48% iterations for decoding and maintaining low decoding complexity, compared with the conventional weighted BF algorithm.","PeriodicalId":250360,"journal":{"name":"CSQRWC 2012","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133403917","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
Robust adaptive beamforming based on propagator method and Eigenspace Beamformer 基于传播器方法和特征空间波束形成器的鲁棒自适应波束形成
CSQRWC 2012 Pub Date : 2012-07-23 DOI: 10.1109/CSQRWC.2012.6294999
Yu Pengcheng, Yang Peng, Y. Fei
{"title":"Robust adaptive beamforming based on propagator method and Eigenspace Beamformer","authors":"Yu Pengcheng, Yang Peng, Y. Fei","doi":"10.1109/CSQRWC.2012.6294999","DOIUrl":"https://doi.org/10.1109/CSQRWC.2012.6294999","url":null,"abstract":"A novel algorithm based on propagator method (PM) and Eigenspace Beamformer (ESB) for robust adaptive beamforming is presented. It has robust characteristics under the conditions of finite samples, desired signal point error and high SNR environment. By using PM, the signal subspace can be derived by propagator matrix, which does not need the complicated eigenvalue decomposition (EVD) or singular-value decomposition (SVD). The efficiency of this method is verified by numerical simulations.","PeriodicalId":250360,"journal":{"name":"CSQRWC 2012","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116710047","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 90° coupler using CMOS-compatible technology 紧凑的90°耦合器采用cmos兼容技术
CSQRWC 2012 Pub Date : 2012-07-23 DOI: 10.1109/CSQRWC.2012.6294978
Jie-Ying Zhong, Sen Wang
{"title":"A compact 90° coupler using CMOS-compatible technology","authors":"Jie-Ying Zhong, Sen Wang","doi":"10.1109/CSQRWC.2012.6294978","DOIUrl":"https://doi.org/10.1109/CSQRWC.2012.6294978","url":null,"abstract":"In this paper, the design and implementation of a compact 90° coupler on a glass substrate is presented. The process provides a low-loss substrate to reduce substrate losses, and three thick metal layers to reduce conductor losses. Therefore, peak-Q factors of capacitors and inductors on the substrate can reach 90 and 30 at least, respectively. Benefiting by these superior passive components, the 5.2-GHz coupler demonstrates a compact design with low insertion losses. The insertion losses are less than 0.97 dB, and the phase difference between in-phase/quadrature outputs is 88.2°. Moreover, the return loss and isolation is 20.2 dB and 22.5 dB, respectively. The chip size including all testing pads is 2.26 × 1.4 mm2.","PeriodicalId":250360,"journal":{"name":"CSQRWC 2012","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132055551","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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