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CSQRWC 2012最新文献

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Calibration of digital modulation quality parameters of 802.11n WLAN tester 校正802.11n无线局域网测试仪的数字调制质量参数
CSQRWC 2012 Pub Date : 2012-07-23 DOI: 10.1109/CSQRWC.2012.6294958
Zhang Zhiqiang, Lai Lei
{"title":"Calibration of digital modulation quality parameters of 802.11n WLAN tester","authors":"Zhang Zhiqiang, Lai Lei","doi":"10.1109/CSQRWC.2012.6294958","DOIUrl":"https://doi.org/10.1109/CSQRWC.2012.6294958","url":null,"abstract":"This paper describes the standard instruments and calibration methods for the calibration of digital modulation parameters of 802.11n WLAN tester, and gives the analysis of the digital modulation quality parameters; finally introduces the checking parameters and checking methods for the 802.11n digital modulation output signal.","PeriodicalId":250360,"journal":{"name":"CSQRWC 2012","volume":"18 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":"126933839","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
An early stopping criterion for LDPC decoding based on average weighted reliability measure 基于平均加权可靠性测度的LDPC译码早期停止准则
CSQRWC 2012 Pub Date : 2012-07-23 DOI: 10.1109/CSQRWC.2012.6294956
Tso-Cho Chen
{"title":"An early stopping criterion for LDPC decoding based on average weighted reliability measure","authors":"Tso-Cho Chen","doi":"10.1109/CSQRWC.2012.6294956","DOIUrl":"https://doi.org/10.1109/CSQRWC.2012.6294956","url":null,"abstract":"An early stopping criterion for low-density parity-check decoding is proposed to reduce the number of decoding iterations. The proposed early stopping criterion is based on the average weighted reliability measure of the hard output of decoder to detect undecodable blocks in an early stage of the decoding process. Simulation results show that the proposed algorithm can achieve about 0.2-0.4 dB coding gain improvement on average while reducing up to about 50%-85% iteration for decoding at low to medium Eb/N0, compared with the existing method.","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":"122315481","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
Implementation of low dropout regulator with low bandgap reference voltage circuit for RFID tag applications 基于低带隙参考电压电路的RFID标签低压差稳压器的实现
CSQRWC 2012 Pub Date : 2012-07-23 DOI: 10.1109/CSQRWC.2012.6294976
Min-Chin Lee, Chi-Chun Hu, Zong-Wei Lin
{"title":"Implementation of low dropout regulator with low bandgap reference voltage circuit for RFID tag applications","authors":"Min-Chin Lee, Chi-Chun Hu, Zong-Wei Lin","doi":"10.1109/CSQRWC.2012.6294976","DOIUrl":"https://doi.org/10.1109/CSQRWC.2012.6294976","url":null,"abstract":"This paper proposes a high performance LDO with low bandgap reference voltage circuit that have a low temperature coefficient and stable supply voltage for applications to RFID Tag power management module. This proposed circuit is design and implemented using the TSMC 0.35μm CMOS 2P4M process. Based on simulated and measured results, the chip size is 0.686 × 0.805mm2 with power dissipation about 1.32mW, and the operation temperature range form 0°C to 100°C with temperature coefficient about 10.52ppm/°C. The chip supply voltage can from 2.9V to 3.3V, with 4mV /V line regulation and 31uV /mA load regulation (output current from 0 ~ 100mA variation), provides an stable output voltage of 1.61V and its low bandgap reference voltage circuit output reference voltage can stable at 0.65V.","PeriodicalId":250360,"journal":{"name":"CSQRWC 2012","volume":"1 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":"131277056","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: 14
The application of composite grid method to an electromagnetic scattering problem 复合网格法在电磁散射问题中的应用
CSQRWC 2012 Pub Date : 2012-07-23 DOI: 10.1109/CSQRWC.2012.6294990
Guizhen Lu, Tao Chen, Li Yang
{"title":"The application of composite grid method to an electromagnetic scattering problem","authors":"Guizhen Lu, Tao Chen, Li Yang","doi":"10.1109/CSQRWC.2012.6294990","DOIUrl":"https://doi.org/10.1109/CSQRWC.2012.6294990","url":null,"abstract":"In this paper, we applied a composite grid method (CGM) to solve the electromagnetic scattering problem of thin wire structures, which can greatly reduce the number of unknowns. Composite grid method derived from the domain decomposition method, solves the formulation on two sets of meshes totally different in mesh-size, the coarse mesh and the fine one. In electromagnetic scattering problems, the fine grid region contains the thin wire structures cause the scattering field. Using the interface boundary condition, the coarse mesh region and fine one are calculated separately, and then the scattering field of the thin wire structure was obtained. The CGM based scheme can reduce the computing effort. We compare the result with the traditional finite element method which partitions the whole domain into fine mesh. The two results agree very well, which demonstrates the validity and efficiency of our method.","PeriodicalId":250360,"journal":{"name":"CSQRWC 2012","volume":"29 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":"124373842","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
Design and implementation of a low power VCO for K-Band Application k波段低功耗压控振荡器的设计与实现
CSQRWC 2012 Pub Date : 2012-07-23 DOI: 10.1109/CSQRWC.2012.6294967
M. Her, Pao-Hsun Wu, C. Huang
{"title":"Design and implementation of a low power VCO for K-Band Application","authors":"M. Her, Pao-Hsun Wu, C. Huang","doi":"10.1109/CSQRWC.2012.6294967","DOIUrl":"https://doi.org/10.1109/CSQRWC.2012.6294967","url":null,"abstract":"A fully integrated low power voltage control oscillator K-Band application is presented in this letter. Using Gm-boosted architecture, the power consumption can be lower. In addition, the capacitive filtering technology can prevent the low frequency tail current noise converted into phase noise, the technology used to enhance the phase noise performance. The VCO design and implement in TSMC 0.18μm COMS technology with 1.5V supply voltage, the simulated power consumption is 15 mV, tuning range is 18.56 GHz ~ 17.51 GHz, phase noise at 1-MHz is -112 dBc/Hz, chip size is 0.496 * 0.678 μm2.","PeriodicalId":250360,"journal":{"name":"CSQRWC 2012","volume":"7 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":"123638302","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 gilbert mixer with passive balun for 18 GHz Application 一种18ghz应用的带被动平衡的吉尔伯特混频器
CSQRWC 2012 Pub Date : 2012-07-23 DOI: 10.1109/CSQRWC.2012.6294989
M. Her, Cheng-Kai Hung, C. Huang, M. Hsu, Wen Ko, Yu-Chang Lin
{"title":"A gilbert mixer with passive balun for 18 GHz Application","authors":"M. Her, Cheng-Kai Hung, C. Huang, M. Hsu, Wen Ko, Yu-Chang Lin","doi":"10.1109/CSQRWC.2012.6294989","DOIUrl":"https://doi.org/10.1109/CSQRWC.2012.6294989","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, balun 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 8.6 dB, input P1dB and power consumption are about -9 dBm and 41.4 mW. The chip size including all testing pads is 0.76 × 0.59 mm2.","PeriodicalId":250360,"journal":{"name":"CSQRWC 2012","volume":"1 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":"128649517","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 low computing I/Q-mismatch compensator for 3GPP LTE systems 用于3GPP LTE系统的低计算I/ q不匹配补偿器
CSQRWC 2012 Pub Date : 2012-07-23 DOI: 10.1109/CSQRWC.2012.6294955
Terng-Yin Hsu, Wei-Chi Lai, Shao-Ying Yeh
{"title":"A low computing I/Q-mismatch compensator for 3GPP LTE systems","authors":"Terng-Yin Hsu, Wei-Chi Lai, Shao-Ying Yeh","doi":"10.1109/CSQRWC.2012.6294955","DOIUrl":"https://doi.org/10.1109/CSQRWC.2012.6294955","url":null,"abstract":"Variations of I/Q gains and phases of RF frontend, namely I/Q mismatch (I/Q-M), are the important impact in OFDM-based wireless accesses. Making a 2×2 MIMO-OFDM modem of 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) work properly, this work investigates a low computing cross-ratio engine to deal with serious I/Q-M by using only synchronization signal (SS). Through performance evaluation, our approach incurs a 0.3-dB SNR loss to maintain BER<;10-5 at 1-dB gain error and 15°-phase error. Hence, this work not only ensures adequate performances, but also makes low computing I/Q-M estimation and compensation.","PeriodicalId":250360,"journal":{"name":"CSQRWC 2012","volume":"33 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":"126426841","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
Aperture-coupled dual-band circularly polarized antenna for RFID reader applications 用于RFID阅读器的孔径耦合双频圆极化天线
CSQRWC 2012 Pub Date : 2012-07-23 DOI: 10.1109/CSQRWC.2012.6294984
H. Hsu, Ting-Jui Huang
{"title":"Aperture-coupled dual-band circularly polarized antenna for RFID reader applications","authors":"H. Hsu, Ting-Jui Huang","doi":"10.1109/CSQRWC.2012.6294984","DOIUrl":"https://doi.org/10.1109/CSQRWC.2012.6294984","url":null,"abstract":"This paper presents the design and testing of an aperture-coupled dual-band and circularly-polarized antenna for RFID reader applications. The antenna was designed to cover both UHF (902 MHz ~ 928 MHz) and microwave (2.4 GHz ~ 2.5 GHz) bands. The coupling apertures were arranged orthogonally with proper phase offset to achieve circular polarization (CP) at both bands. The fabricated prototype exhibited good impedance bandwidth, an axial ratio of less than 3 dB, and 7dBi peak gain at both bands.","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":"133962297","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
Far field of an arbitrarily oriented helical antenna over the half space 任意定向的螺旋天线在半空间上的远场
CSQRWC 2012 Pub Date : 2012-07-23 DOI: 10.1109/CSQRWC.2012.6294992
Cao Le, Wei Bing, Ge De-biao, Xu Hong-bing, Guo Li-xin
{"title":"Far field of an arbitrarily oriented helical antenna over the half space","authors":"Cao Le, Wei Bing, Ge De-biao, Xu Hong-bing, Guo Li-xin","doi":"10.1109/CSQRWC.2012.6294992","DOIUrl":"https://doi.org/10.1109/CSQRWC.2012.6294992","url":null,"abstract":"Based on the reciprocity theorem, the far field formulation in the frequency domain of an arbitrarily oriented electric dipole located above the interface of the half space is deduced. Then the radiation patterns of an arbitrarily oriented helical antenna over half-space are given. The results show that this formulation can be applied to fast calculation the far radiation field of an antenna located above the interface of the half space.","PeriodicalId":250360,"journal":{"name":"CSQRWC 2012","volume":"55 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":"115255665","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 HMM- based approach for online Uyghur word handwriting recognition 基于HMM的在线维吾尔文字手写识别方法
CSQRWC 2012 Pub Date : 2012-07-23 DOI: 10.1109/CSQRWC.2012.6294993
H Zhao, Wenping Ge
{"title":"A HMM- based approach for online Uyghur word handwriting recognition","authors":"H Zhao, Wenping Ge","doi":"10.1109/CSQRWC.2012.6294993","DOIUrl":"https://doi.org/10.1109/CSQRWC.2012.6294993","url":null,"abstract":"Online handwriting recognition is a very important part in the field of pattern recognition. Up to now there are few reports about the online Uyghur word handwriting recognition. This paper proposes an effective method based on HMM to recognize handwritten Uyghur word. This method introduces a feature extraction approach and presents a language model, resulting in a higher accuracy.","PeriodicalId":250360,"journal":{"name":"CSQRWC 2012","volume":"9 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":"122021966","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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