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2011 IEEE Radio and Wireless Symposium最新文献

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Enhanced architecture to increase the dynamic range of SDR receivers 增强架构，增加SDR接收机的动态范围
2011 IEEE Radio and Wireless Symposium Pub Date : 2011-03-07 DOI: 10.1109/RWS.2011.5725481
P. Cruz, N. Carvalho
{"title":"Enhanced architecture to increase the dynamic range of SDR receivers","authors":"P. Cruz, N. Carvalho","doi":"10.1109/RWS.2011.5725481","DOIUrl":"https://doi.org/10.1109/RWS.2011.5725481","url":null,"abstract":"This paper proposes an architecture to increase the dynamic range of the analog to digital signal conversion. Preferably, such an architecture will witness more applicability in the wideband digital receivers for software-defined radio. It is based in passive circuitry followed by two analog-to-digital converters that acquire the incoming analog signal, and then digital signal processing is applied to reconstruct the signal. We will demonstrate clear improvements related to the case when only one analog-to-digital converter is used. Also, this architecture will be validated through several simulations, in which it will be subjected to common modulated signals that confirms the validity of such an architecture.","PeriodicalId":250672,"journal":{"name":"2011 IEEE Radio and Wireless Symposium","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122412293","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: 6
Multipath modeling using canonical scatterers 使用规范散射体的多路径建模
2011 IEEE Radio and Wireless Symposium Pub Date : 2011-03-07 DOI: 10.1109/RWS.2011.5725419
V. G. Kononov, C. Balanis
{"title":"Multipath modeling using canonical scatterers","authors":"V. G. Kononov, C. Balanis","doi":"10.1109/RWS.2011.5725419","DOIUrl":"https://doi.org/10.1109/RWS.2011.5725419","url":null,"abstract":"Multipath modeling is presented using infinitely long cylinders. It is shown that the known stochastic fading models, Rayleigh and Rician, can be obtained by treating multipath deterministically, that is, by solving the electromagnetic scattering problem.","PeriodicalId":250672,"journal":{"name":"2011 IEEE Radio and Wireless Symposium","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116933106","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
High performance organic substrate with high dielectric constant, low loss, and low temperature coefficient of resonant frequency for high frequency RF module applications 高性能有机衬底，具有高介电常数，低损耗和低谐振频率温度系数，适用于高频射频模块应用
2011 IEEE Radio and Wireless Symposium Pub Date : 2011-03-07 DOI: 10.1109/RWS.2011.5725446
Kiyoshige Kojima, Naomi Shiga, T. Matsuo, R. Mori, Y. Hayashi, Mitsushi Tada, T. Jimbo
{"title":"High performance organic substrate with high dielectric constant, low loss, and low temperature coefficient of resonant frequency for high frequency RF module applications","authors":"Kiyoshige Kojima, Naomi Shiga, T. Matsuo, R. Mori, Y. Hayashi, Mitsushi Tada, T. Jimbo","doi":"10.1109/RWS.2011.5725446","DOIUrl":"https://doi.org/10.1109/RWS.2011.5725446","url":null,"abstract":"In this paper we present a thin organic resin substrate material (called X-R) for RF modules and high frequency devices, which has a very low insertion loss property. The X-R material possesses the same dielectric constant (Dk=7.0) and the same loss (Df=0.003) as LTCC, and shows low TCF (temperature coefficient of resonant frequency) (5.9ppm/deg.C at 1GHz). We have proven that embedded band-pass filter based on the X-R shows very low insertion loss (S21) performance, which is promising for RF modules and high frequency devices","PeriodicalId":250672,"journal":{"name":"2011 IEEE Radio and Wireless Symposium","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116779261","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
Multiuser chip timing recovery in asynchronous CDMA systems using a transpose domain filter 异步CDMA系统中使用转置域滤波器的多用户芯片时序恢复
2011 IEEE Radio and Wireless Symposium Pub Date : 2011-03-07 DOI: 10.1109/RWS.2011.5725413
S. Sud
{"title":"Multiuser chip timing recovery in asynchronous CDMA systems using a transpose domain filter","authors":"S. Sud","doi":"10.1109/RWS.2011.5725413","DOIUrl":"https://doi.org/10.1109/RWS.2011.5725413","url":null,"abstract":"Asynchronous CDMA systems require that the base station synchronizes with each user's length N spreading code to despread and recover the modulated data. This problem is usually solved by a brute-force method of correlating the incoming signal with the spreading code. In this paper we present a method of obtaining chip-level synchronization for all K users of the system simultaneously. The approach derives from the transpose domain filter (TDF) method, which has been used to obtain bit timing of synchronous CDMA users. We propose a modified TDF to obtain chip timing for asynchronous users, whose solution is implemented efficiently using a parallel bank of multistage Wiener filters (MWFs) for all K users simultaneously. We demonstrate the effectiveness of the technique in giving near 100% success in timing estimation for heavily loaded systems when Eb/N0 ≥ 0 dB and enough bits, M, e.g. M ≥ 16N, is used to obtain the estimate.","PeriodicalId":250672,"journal":{"name":"2011 IEEE Radio and Wireless Symposium","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117257902","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
LMS based digital cancellation of second-order TX intermodulation products in homodyne receivers 纯差接收机中二阶TX互调产品的LMS数字对消
2011 IEEE Radio and Wireless Symposium Pub Date : 2011-03-07 DOI: 10.1109/RWS.2011.5725478
C. Lederer, M. Huemer
{"title":"LMS based digital cancellation of second-order TX intermodulation products in homodyne receivers","authors":"C. Lederer, M. Huemer","doi":"10.1109/RWS.2011.5725478","DOIUrl":"https://doi.org/10.1109/RWS.2011.5725478","url":null,"abstract":"Second-order intermodulation products are produced by non-linearities in the transfer functions of the receiver's signal processing blocks. Especially in homodyne receivers the second-order intermodulations are problematic since they are convolved into baseband and overlap the wanted signal. In this paper a Least-Mean-Square (LMS) adaptive filter approach to estimate and cancel the transmitter (TX) induced second-order intermodulation distortion (IMD2) in the digital domain is presented. The performance of the proposed cancellation method and its dependency on the number of used filter coefficients is verified on measured data of the digital front end (DFE) output of an UMTS transceiver chip.","PeriodicalId":250672,"journal":{"name":"2011 IEEE Radio and Wireless Symposium","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114228752","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
Spurious mechanisms and debugging in direct digital synthesis 直接数字合成中的杂散机制和调试
2011 IEEE Radio and Wireless Symposium Pub Date : 2011-03-07 DOI: 10.1109/RWS.2011.5725414
E. McCune
{"title":"Spurious mechanisms and debugging in direct digital synthesis","authors":"E. McCune","doi":"10.1109/RWS.2011.5725414","DOIUrl":"https://doi.org/10.1109/RWS.2011.5725414","url":null,"abstract":"While the technique of direct digital frequency synthesis (DDFS) is well known, the mechanisms active in the generation of non-harmonic spurious output signals are not so well known. Here the significant spurious generating processes active in a DDFS design are illustrated. Use of this information in debugging a DDFS design to fundamentally reduce power in spurious signals is discussed. Thus this work specifically excludes dithering, a spurious power spreading process, from the techniques considered.","PeriodicalId":250672,"journal":{"name":"2011 IEEE Radio and Wireless Symposium","volume":"136 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126864647","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 low cost analog FIR channel select filter for wireless receiver 一种用于无线接收机的低成本模拟FIR通道选择滤波器
2011 IEEE Radio and Wireless Symposium Pub Date : 2011-03-07 DOI: 10.1109/RWS.2011.5725511
D. Ahn, Songcheol Hong
{"title":"A low cost analog FIR channel select filter for wireless receiver","authors":"D. Ahn, Songcheol Hong","doi":"10.1109/RWS.2011.5725511","DOIUrl":"https://doi.org/10.1109/RWS.2011.5725511","url":null,"abstract":"This paper proposes a novel analog FIR low pass filtering scheme. Instead of using one FIR filter with large number of coefficients, three cascaded FIR filters with the smaller number of coefficients are used. This scheme is robust against to the coefficient error induced by actual fabrication processes. In addition, the reduced number of switches leads to the small chip area. These allow the small and accurate analog filter to be implemented with deep-submicron digital CMOS process. This filter has a stop band rejection of more than 40 dB, IIP3 of +12.5 dBm, while consuming 1.2 mW power from 1.2 V power supply at sampling frequency of 36 MHz. The core chip area is 0.23 mm2.","PeriodicalId":250672,"journal":{"name":"2011 IEEE Radio and Wireless Symposium","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122647145","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: 6
Field distribution modeling and measurements of ferrite-loaded CBS antennas 铁氧体负载CBS天线的场分布建模与测量
2011 IEEE Radio and Wireless Symposium Pub Date : 2011-03-07 DOI: 10.1109/RWS.2011.5725418
V. G. Kononov, C. Balanis, C. Birtcher
{"title":"Field distribution modeling and measurements of ferrite-loaded CBS antennas","authors":"V. G. Kononov, C. Balanis, C. Birtcher","doi":"10.1109/RWS.2011.5725418","DOIUrl":"https://doi.org/10.1109/RWS.2011.5725418","url":null,"abstract":"When computing the permeability tensor of the ferrite material, it is often assumed that the internal magnetic field is uniform. In this paper we compare simulations and measurements of the input impedance of a ferrite-loaded CBS antenna based on the non-uniform field distribution with those based on the uniform field distribution.","PeriodicalId":250672,"journal":{"name":"2011 IEEE Radio and Wireless Symposium","volume":"40 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123405555","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
Concept for a time-code signal assisted single-shot receiver 时间编码信号辅助单发接收机的概念
2011 IEEE Radio and Wireless Symposium Pub Date : 2011-03-07 DOI: 10.1109/RWS.2011.5725480
Christoph Kandziora, R. Weigel
{"title":"Concept for a time-code signal assisted single-shot receiver","authors":"Christoph Kandziora, R. Weigel","doi":"10.1109/RWS.2011.5725480","DOIUrl":"https://doi.org/10.1109/RWS.2011.5725480","url":null,"abstract":"This paper presents a novel concept for a GNSS receiver for mobile devices based on the single-shot receiver concept. In comparison to the common single-shot receiver the amount of computational hardware is significantly reduced by an estimation of the time of signal reception. This allows an a-priori estimation of the code-phase of the satellites in view. The synchronisation to the time code signal must be better than 1 ms for GPS-In-Orbit-Vehicles(IOVs) to take effect which is here realized by using the german DCF77 signal with an precision of 250 ns under ideal circumstances. Regarding all uncertainties in time and the amount of signal processing power required for the time synchronisation the computational effort for the advanced single-shot receiver can be cut down by a factor of two.","PeriodicalId":250672,"journal":{"name":"2011 IEEE Radio and Wireless Symposium","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122260071","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
Tunable low-voltage dual-directional ESD protection for RFICs rfic的可调低压双向ESD保护
2011 IEEE Radio and Wireless Symposium Pub Date : 2011-03-07 DOI: 10.1109/RWS.2011.5725504
Jian Liu, Lin Lin, Xin Wang, H Zhao, He Tang, Q. Fang, Albert Z. H. Wang, Liwu Yang, Haolu Xie, S. Fan, B. Zhao, Gary Zhang, Xingang Wang
{"title":"Tunable low-voltage dual-directional ESD protection for RFICs","authors":"Jian Liu, Lin Lin, Xin Wang, H Zhao, He Tang, Q. Fang, Albert Z. H. Wang, Liwu Yang, Haolu Xie, S. Fan, B. Zhao, Gary Zhang, Xingang Wang","doi":"10.1109/RWS.2011.5725504","DOIUrl":"https://doi.org/10.1109/RWS.2011.5725504","url":null,"abstract":"This paper reports a tunable low triggering voltage, dual-directional SCR ESD protection structure in CMOS for RF ICs. A new embedded gate-coupling technique is used to reduce and adjust its triggering voltage. Experiment shows a low discharging resistance of ∼0.26Ω, low leakage current of ∼0.19nA, low parasitic capacitance of ∼150fF and ultra fast response time of ∼100pS. This structure achieves ESD protection of >9.20kV HBM and >500V CDM for a 90µm device. A high ESD protection to Si ratio of ESDV∼8.17V/µm<sup>2</sup> is obtained for RF IC applications.","PeriodicalId":250672,"journal":{"name":"2011 IEEE Radio and Wireless Symposium","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134296117","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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