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Advanced transmitters with combined crest factor reduction and digital predistortion techniques 先进的发射机结合波峰因数降低和数字预失真技术
2014 IEEE Radio and Wireless Symposium (RWS) Pub Date : 2014-06-12 DOI: 10.1109/RWS.2014.6830153
Alessio Farabegoli, B. Sogl, J. Mueller, R. Weigel
{"title":"Advanced transmitters with combined crest factor reduction and digital predistortion techniques","authors":"Alessio Farabegoli, B. Sogl, J. Mueller, R. Weigel","doi":"10.1109/RWS.2014.6830153","DOIUrl":"https://doi.org/10.1109/RWS.2014.6830153","url":null,"abstract":"This paper analyses the benefits of combining crest factor reduction (CFR) technique and digital predistortion (DPD). DPD and CFR have been mainly investigated separately, and this is the contribution to the state of the art given here. The combination is attractive in modern wireless transmission systems due to the high peak-to-average-power-ratio (PAPR) of the signals employed. In these cases, the compression of the signal peaks performed by the amplifier in strong saturation region causes uncontrolled in-band and out-of-band distortion that degrades ACLR and EVM of the output signal. The joint architecture can take advantage from the improved linear output power given by DPD together with a controlled reduction of the peaks performed by CFR. The PA can in this way deliver a higher linear output power having at the same time a predictable linearity of the output RF signal. The concept has been implemented and tested on a commercial GaAs PA, obtaining an increased linear output power of 1.9 dB compared to the standalone PA when a WCDMA signal with PAPR of 3.47 dB is employed.","PeriodicalId":247495,"journal":{"name":"2014 IEEE Radio and Wireless Symposium (RWS)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127206703","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: 7
Modeling the influence of wall roughness on tunnel propagation 模拟壁面粗糙度对隧道扩展的影响
2014 IEEE Radio and Wireless Symposium (RWS) Pub Date : 2014-06-12 DOI: 10.1109/RWS.2014.6830097
Chenming Zhou, J. Waynert
{"title":"Modeling the influence of wall roughness on tunnel propagation","authors":"Chenming Zhou, J. Waynert","doi":"10.1109/RWS.2014.6830097","DOIUrl":"https://doi.org/10.1109/RWS.2014.6830097","url":null,"abstract":"At the ultra-high frequencies (UHF) common to portable radios, a mine tunnel is often modeled as a hollow dielectric waveguide. The roughness condition of the tunnel walls has an influence on radio propagation and therefore should be taken into account when accurate power predictions are required. In this paper, we derive a general analytical formula for modeling the influence of the wall roughness. The formula can model practical tunnels formed by four dielectric walls, with each having an independent roughness condition. It is found that different modes are attenuated by the same wall roughness in a different way, with higher order modes being significantly more attenuated compared to the dominant mode. The derivation and findings are verified by numerical results based on both ray tracing and modal methods.","PeriodicalId":247495,"journal":{"name":"2014 IEEE Radio and Wireless Symposium (RWS)","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124075518","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
Performance analysis of cognitive radio networks over к-μ fading channel with noise uncertainty 具有噪声不确定性的认知无线网络的性能分析
2014 IEEE Radio and Wireless Symposium (RWS) Pub Date : 2014-06-12 DOI: 10.1109/RWS.2014.6830090
Fabio von Glehn, U. Dias
{"title":"Performance analysis of cognitive radio networks over к-μ fading channel with noise uncertainty","authors":"Fabio von Glehn, U. Dias","doi":"10.1109/RWS.2014.6830090","DOIUrl":"https://doi.org/10.1109/RWS.2014.6830090","url":null,"abstract":"In order to be able to perform a Spectrum Sensing in a reliably manner we must take in consideration a physical fading model which will fit with the reality presented. In this work we analyze the energy detection characteristics over a generalized fading channel, modeled by the κ-μ distribution. Admitting the noise power estimation error, the worst-case of the probabilities of miss detection and false-alarm, due to the noise uncertainty, are derived under the spectrum utilization constraint. An optimal threshold selection is presented in order to allow the energy detector to operate in regions of low SNR. Field measurements are used to investigate in practice the usefulness of the κ-μ fading channel in cooperative spectrum sensing scenarios. Comparisons are performed against Rice fading model where it is possible to notice a great advantage in using the κ-μ distribution to describe the fading channel.","PeriodicalId":247495,"journal":{"name":"2014 IEEE Radio and Wireless Symposium (RWS)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129130662","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: 8
Wake-up radio architecture for home wireless networks 用于家庭无线网络的唤醒无线电架构
2014 IEEE Radio and Wireless Symposium (RWS) Pub Date : 2014-06-12 DOI: 10.1109/RWS.2014.6830103
F. Hutu, Aissa Khoumeri, G. Villemaud, J. Gorce
{"title":"Wake-up radio architecture for home wireless networks","authors":"F. Hutu, Aissa Khoumeri, G. Villemaud, J. Gorce","doi":"10.1109/RWS.2014.6830103","DOIUrl":"https://doi.org/10.1109/RWS.2014.6830103","url":null,"abstract":"In this paper it is presented and validated by simulation a wake-up radio receiver (WuRx), allowing to both addressing and wake-up a main radio, with best performance but more energy consuming. The main goal is to reduce the total energy consumption of a home multimedia network by switching off the data module of each equipment during the periods when it is not used. The wake-up receiver is designed to be able to detect a wake-up signal which has a frequency signature and so, it is avoided to activate all data interfaces but only the one of interest.","PeriodicalId":247495,"journal":{"name":"2014 IEEE Radio and Wireless Symposium (RWS)","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122222855","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: 16
Development of multiuser MIMO testbed adopting Tomlinson-Harashima Precoding and limited CSI feedback 采用Tomlinson-Harashima预编码和有限CSI反馈的多用户MIMO试验台的开发
2014 IEEE Radio and Wireless Symposium (RWS) Pub Date : 2014-06-12 DOI: 10.1109/RWS.2014.6830140
Tomoko Matsumoto, Y. Hatakawa, K. Kitagawa, S. Konishi
{"title":"Development of multiuser MIMO testbed adopting Tomlinson-Harashima Precoding and limited CSI feedback","authors":"Tomoko Matsumoto, Y. Hatakawa, K. Kitagawa, S. Konishi","doi":"10.1109/RWS.2014.6830140","DOIUrl":"https://doi.org/10.1109/RWS.2014.6830140","url":null,"abstract":"This paper presents the development of an 8-by-2 real-time multiuser-multiple input multiple output (MU-MIMO) testbed adopting Tomlinson-Harashima Precoding (THP) and limited channel state information (CSI) feedback. In this paper, we present an overview of the MU-MIMO testbed and show the implementation validity of the testbed. The experimental results show that the testbed achieves up to 2.4 dB degradation of BLER compared to the floating point computer simulation results.","PeriodicalId":247495,"journal":{"name":"2014 IEEE Radio and Wireless Symposium (RWS)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128360087","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
GPU accelerated channel modeling ray tracing tool GPU加速通道建模光线追踪工具
2014 IEEE Radio and Wireless Symposium (RWS) Pub Date : 2014-06-12 DOI: 10.1109/RWS.2014.6830135
A. Abdellatif, S. Safavi-Naeini
{"title":"GPU accelerated channel modeling ray tracing tool","authors":"A. Abdellatif, S. Safavi-Naeini","doi":"10.1109/RWS.2014.6830135","DOIUrl":"https://doi.org/10.1109/RWS.2014.6830135","url":null,"abstract":"In this paper a generic 2D Ray tracing channel modeling tool is proposed. The proposed tool has been optimized for GPU architecture. Two examples for different types of applications have been presented and used to profile the tool. Comparative results have been presented for different parameters and examples. Due to its high speed, the proposed tool is useful for system optimization for large EM problems such as automotive radar application.","PeriodicalId":247495,"journal":{"name":"2014 IEEE Radio and Wireless Symposium (RWS)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131649895","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
Design of low phase-noise voltage-controlled oscillator using tunable evanescent-mode cavity 基于可调谐倏逝模腔的低相位噪声压控振荡器设计
2014 IEEE Radio and Wireless Symposium (RWS) Pub Date : 2014-06-12 DOI: 10.1109/RWS.2014.6830086
Yuhao Liu, A. Anand, X. Liu
{"title":"Design of low phase-noise voltage-controlled oscillator using tunable evanescent-mode cavity","authors":"Yuhao Liu, A. Anand, X. Liu","doi":"10.1109/RWS.2014.6830086","DOIUrl":"https://doi.org/10.1109/RWS.2014.6830086","url":null,"abstract":"In this paper, a low phase-noise voltage-controlled oscillator using tunable evanescent-mode cavity is designed, fabricated, and measured. The oscillator is tuned by lumped element varactors placed on the top surface of a substrate-integrated evanescent-mode cavity. The tuning range of the oscillator is 783.6-976.8 MHz with peak output power of 6.97 dBm at 943.2 MHz. Over the tuning frequency the oscillator has a phase noise from -103.8 to -119.4 dBc/Hz at 100 kHz offset frequency and from -141.8 to -152.3 dBc/Hz at 1 MHz offset frequency. The resonator is compatible with RF MEMS tuner to yield a higher resonator Q and better phase noise performance.","PeriodicalId":247495,"journal":{"name":"2014 IEEE Radio and Wireless Symposium (RWS)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133190476","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
Highly flexible cognitive radio spectrum sensing front-end 高度灵活的认知无线电频谱传感前端
2014 IEEE Radio and Wireless Symposium (RWS) Pub Date : 2014-06-12 DOI: 10.1109/RWS.2014.6830121
P. Lohmiller, Ahmed Elsokary, S. Chartier, H. Schumacher
{"title":"Highly flexible cognitive radio spectrum sensing front-end","authors":"P. Lohmiller, Ahmed Elsokary, S. Chartier, H. Schumacher","doi":"10.1109/RWS.2014.6830121","DOIUrl":"https://doi.org/10.1109/RWS.2014.6830121","url":null,"abstract":"Cognitive radio radio networks employing distributed spectrum sensing techniques will need inexpensive, highly compact spectrum sensing front-ends. This paper presents a highly compact approach utilizing three custom radio-frequency integrated circuits realized in a 0.25 μm Si/SiGe:C BiCMOS technology, replacing a larger number of off-the-shelf components more commonly used. It provides more than 24 dB gain and achieves an IIP3 of -9 dBm. An overall bandwidth of 2 GHz can be sensed in segments of up to 200 MHz. In combination with a Virtex 6 FPGA, reliable spectrum sensing in different realistic scenarios is finally demonstrated.","PeriodicalId":247495,"journal":{"name":"2014 IEEE Radio and Wireless Symposium (RWS)","volume":"146 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132124411","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 wideband flexible digital receiver using polyphase harmonic mixer 采用多相谐波混频器的宽带柔性数字接收机
2014 IEEE Radio and Wireless Symposium (RWS) Pub Date : 2014-06-12 DOI: 10.1109/RWS.2014.6830148
W. Namgoong
{"title":"A wideband flexible digital receiver using polyphase harmonic mixer","authors":"W. Namgoong","doi":"10.1109/RWS.2014.6830148","DOIUrl":"https://doi.org/10.1109/RWS.2014.6830148","url":null,"abstract":"A wideband flexible digital receiver architecture suitable for software-defined and cognitive radios is presented. The receiver employs a polyphase harmonic mixer and exploits the harmonics caused by hard-switching commutating mixers to minimize the harmonic distortion in the signal path, reduce the tuning range of the frequency synthesizer, and sense a wider frequency spectrum. A robust digital equalizer in the presence of mixer gain/phase mismatch uncertainty is provided. The number of polyphase mixers needed for different operating interference environments is determined via simulation.","PeriodicalId":247495,"journal":{"name":"2014 IEEE Radio and Wireless Symposium (RWS)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117252126","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
3D-integrated, low-height, small module design techniques for 4.48GHz, 560MHz-bandwidth TransferJet™ transceiver 用于4.48GHz, 560mhz带宽TransferJet™收发器的3d集成，低高度，小模块设计技术
2014 IEEE Radio and Wireless Symposium (RWS) Pub Date : 2014-06-12 DOI: 10.1109/RWS.2014.6830099
K. Agawa, I. Seto, A. Happoya, Y. Iida, Yusuke Imaizumi, M. Okano, Daigo Suzuki, Yuichi Sato, Masaomi Iwanaga, Kazumi Sato, S. Arai, Noriaki Uchida, Koji Ryugo, D. Miyashita, R. Fujimoto, Y. Unekawa
{"title":"3D-integrated, low-height, small module design techniques for 4.48GHz, 560MHz-bandwidth TransferJet™ transceiver","authors":"K. Agawa, I. Seto, A. Happoya, Y. Iida, Yusuke Imaizumi, M. Okano, Daigo Suzuki, Yuichi Sato, Masaomi Iwanaga, Kazumi Sato, S. Arai, Noriaki Uchida, Koji Ryugo, D. Miyashita, R. Fujimoto, Y. Unekawa","doi":"10.1109/RWS.2014.6830099","DOIUrl":"https://doi.org/10.1109/RWS.2014.6830099","url":null,"abstract":"A low-height, small module for 4.48GHz carrier frequency, 560MHz bandwidth transceiver has been designed employing 3D integration technology. An LSI integrated with RF and digital baseband circuits is embedded in an organic resin substrate of the module to achieve a small module size of 4.8mm × 4.8mm × 1.0mm. Since RF signals are degraded by parasitic capacitance associated with the low height and small footprint of the module, three design techniques are proposed in the paper. The module realizes the world's smallest size, and achieves sufficient transmitter modulation accuracy and receiver sensitivity, which meet TransferJet™ standards.","PeriodicalId":247495,"journal":{"name":"2014 IEEE Radio and Wireless Symposium (RWS)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114553888","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
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