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2015 IEEE International Wireless Symposium (IWS 2015)最新文献

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A digital RF transmitter prototype for the future massive MIMO system 未来大规模MIMO系统的数字射频发射机原型
2015 IEEE International Wireless Symposium (IWS 2015) Pub Date : 2015-07-27 DOI: 10.1109/IEEE-IWS.2015.7164626
Zhiqiang Yu, Jianyi Zhou, Ruoqiao Zhang, Wenwen Yang
{"title":"A digital RF transmitter prototype for the future massive MIMO system","authors":"Zhiqiang Yu, Jianyi Zhou, Ruoqiao Zhang, Wenwen Yang","doi":"10.1109/IEEE-IWS.2015.7164626","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2015.7164626","url":null,"abstract":"In this paper, a novel architecture of a digital RF transmitter for the future massive MIMO system is proposed, which features flexible deployment, low cost, small volume and power efficiency. The comparison with a traditional architecture is also provided. To evaluate the feasibility of the proposed architecture, a prototype of one radio channel is implemented. The prototype consists of a BBU (Base Band Unit) and a RRU (Remote Radio Unit) which are connected by the well developed digital fiber interface, such as SFP (Small Form-Factor Pluggable) optical module and multi-gigabits transceiver in Xilinx FPGA. The core of the BBU is a 4 order BPSDM (Band Pass Sigma-Delta Modulator) which convert the downlink signal of 10MHz symbol rate and 500MHz carrier to a high speed binary 1-bit data stream of 2Gbps. In the RRU, the 500MHz RF signal is retrieved from the 1-bit data stream by bandpass filtering. To extend the RF frequency, the first image signal at 1.5GHz could be exploited. The measurement results show that EVM (Error Vector Magnitude) performance of the 500MHz and 1.5GHz RF output signal is 1.62% and 3.64% respectively.","PeriodicalId":164534,"journal":{"name":"2015 IEEE International Wireless Symposium (IWS 2015)","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115876650","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 high efficiency and high linearity two-stage power amplifier 一种高效率、高线性度的两级功率放大器
2015 IEEE International Wireless Symposium (IWS 2015) Pub Date : 2015-07-27 DOI: 10.1109/IEEE-IWS.2015.7164631
Hai-Feng Wu, Qian-Fu Cheng
{"title":"A high efficiency and high linearity two-stage power amplifier","authors":"Hai-Feng Wu, Qian-Fu Cheng","doi":"10.1109/IEEE-IWS.2015.7164631","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2015.7164631","url":null,"abstract":"A two-stage power amplifier (PA) using GaN HEMTs is presented with a high power added efficiency (PAE) and good linearity. This PA employs a structure of a class-C PA driving a class-AB PA to obtain a high PAE while maintaining the linearity. Source-pull and load-pull techniques were implemented to achieve optimum output impedance and inter-stage matching condition to compromise the PAE and the linearity of the overall circuit. When producing a two-tone carrier-to-intermodulation (C/I) ratio of 30 dB with the 1 MHz space, the two-stage PA exhibits a maximum PAE of 47% with an output power of 3 W at 3.7 GHz. The PA provides a maximum output power of 7 W with the gain of 15.8 dB.","PeriodicalId":164534,"journal":{"name":"2015 IEEE International Wireless Symposium (IWS 2015)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122872769","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 77 GHz waveform generator with MFSK modulation for automotive radar applications 77 GHz波形发生器与MFSK调制的汽车雷达应用
2015 IEEE International Wireless Symposium (IWS 2015) Pub Date : 2015-07-27 DOI: 10.1109/IEEE-IWS.2015.7164548
Q. N. Nguyen, Hyongi Yoo, MyoungYeol Park, Youngsu Kim, F. Bien
{"title":"A 77 GHz waveform generator with MFSK modulation for automotive radar applications","authors":"Q. N. Nguyen, Hyongi Yoo, MyoungYeol Park, Youngsu Kim, F. Bien","doi":"10.1109/IEEE-IWS.2015.7164548","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2015.7164548","url":null,"abstract":"In this paper, a 77 GHz waveform generator with Multiple Frequency Shift Keying (MFSK) is presented. This modulation waveform can improve the detection ability of automotive radar systems. A MFSK Modulation Control Logic (MMCL) is proposed, incorporates a conventional Σ-Δ fractional-N Phase Locked Loop to generate the modulation waveform. The MMCL has capability to track the linear frequency sweep while generating the frequency shift keying (FSK) in each time step. Prior to realizing the hardware, a behavioural simulation is considered and the output of 64 steps is generated. The modulated frequency synthesizer is designed using 130-nm CMOS process. The module of 77 GHz waveform generator, which generates 128 modulation steps, is accomplished. The bandwidth and the frequency step of the modulation are 100 MHz and 300 kHz, respectively. The results demonstrate that the proposed scheme has ability to realize the MFSK modulation waveform for automotive radar systems, also a short processing interval of 6 ms can be achieved.","PeriodicalId":164534,"journal":{"name":"2015 IEEE International Wireless Symposium (IWS 2015)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132566131","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
A 3.5–9.5 GHz compact digital power amplifier with 39.3% peak PAE in 40nm CMOS technology 3.5-9.5 GHz紧凑型数字功率放大器，峰值PAE为39.3%，采用40nm CMOS技术
2015 IEEE International Wireless Symposium (IWS 2015) Pub Date : 2015-07-27 DOI: 10.1109/IEEE-IWS.2015.7164565
H. Qian, J. Liang, Xun Luo
{"title":"A 3.5–9.5 GHz compact digital power amplifier with 39.3% peak PAE in 40nm CMOS technology","authors":"H. Qian, J. Liang, Xun Luo","doi":"10.1109/IEEE-IWS.2015.7164565","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2015.7164565","url":null,"abstract":"A 3.5-9.5 GHz fully integrated digital power amplifier (DPA) with peak PAE of 39.3% in 40nm CMOS technology intended for a polar transmitter is presented. A compact wideband DPA design technique employing stacked stepped-impedance (SSI) transformer is firstly introduced to improve the power efficiency while tracking optimum load impedance in a wide bandwidth. This is the only reported wideband DPA operating above 3 GHz with a record fractional bandwidth (FBW) of 92.3%. The DPA exhibits peak output power of 22.2dBm and peak drain efficiency of 46.2% with 1.2V supply. The core chip size is only 0.22 mm2.","PeriodicalId":164534,"journal":{"name":"2015 IEEE International Wireless Symposium (IWS 2015)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133642410","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
A D-band chip-to-waveguide-horn (CWH) antenna with 18.9 dBi gain using CMOS technology 采用CMOS技术设计的增益为18.9 dBi的d波段芯片-波导-喇叭(CWH)天线
2015 IEEE International Wireless Symposium (IWS 2015) Pub Date : 2015-07-27 DOI: 10.1109/IEEE-IWS.2015.7164518
Xiaodong Deng, Yihu Li, Wen Wu, Y. Xiong
{"title":"A D-band chip-to-waveguide-horn (CWH) antenna with 18.9 dBi gain using CMOS technology","authors":"Xiaodong Deng, Yihu Li, Wen Wu, Y. Xiong","doi":"10.1109/IEEE-IWS.2015.7164518","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2015.7164518","url":null,"abstract":"This paper presents an chip-to-waveguide-horn (CWH) antenna structure to improve silicon-based on-chip antenna gain at D-band. In the proposed CWH antenna structure, a transition from chip to rectangular waveguide is adopted and is followed by a horn for power radiation. For the chip-to-waveguide transition, a high efficiency dielectric resonator antenna (DRA), which is excited by a substrate integrated waveguide (SIW) cavity backed on-chip antenna, is used to transfer the power to the waveguide. The simulated results indicate 45% radiation efficiency and -17 dB reflection coefficient for the CWH antenna at 140 GHz. The proposed CWH antenna is measured by using on-wafer testing method and the measured results show the peak gain of 18.9 dBi at 143 GHz with the 3 dB bandwidth of 21 GHz and the reflection coefficients <;-6 dB from 120-160 GHz.","PeriodicalId":164534,"journal":{"name":"2015 IEEE International Wireless Symposium (IWS 2015)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134220158","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 compact I/Q imbalance calibration technique for power-aware fully-integrated receiver without on-chip baseband processor 一种用于无片上基带处理器的功率感知全集成接收机的紧凑I/Q不平衡校准技术
2015 IEEE International Wireless Symposium (IWS 2015) Pub Date : 2015-07-27 DOI: 10.1109/IEEE-IWS.2015.7164512
Mo Huang, Xiaofeng Liang, Jianping Guo, Dihu Chen
{"title":"A compact I/Q imbalance calibration technique for power-aware fully-integrated receiver without on-chip baseband processor","authors":"Mo Huang, Xiaofeng Liang, Jianping Guo, Dihu Chen","doi":"10.1109/IEEE-IWS.2015.7164512","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2015.7164512","url":null,"abstract":"The in-phase and quadrature (I/Q) calibration has been typically implemented in DSP/MCU to reject image in receive chain. In this work, a compact, fully-integrated calibration technique is proposed without the need of baseband processors, which is very suitable for low-power low-cost wireless applications. By making use of the transmitter (TX) phase loop lock (PLL) in frequency duplex division (FDD) mode, a clean, compact calibration source is implemented with only 0.069mm2 extra area. The proposed calibration technique has been applied to an FDD transceiver in 0.13-μm CMOS technology. The measurements show that with the proposed calibration, a -60-dBc image rejection ratio (IRR), a minimum 1.7% error vector magnitude (EVM), and a 26-μs calibration time are achieved.1","PeriodicalId":164534,"journal":{"name":"2015 IEEE International Wireless Symposium (IWS 2015)","volume":"238 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115503962","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
Investigation of the attenuation characteristics of radio signal in ruins 废墟中无线电信号衰减特性的研究
2015 IEEE International Wireless Symposium (IWS 2015) Pub Date : 2015-07-27 DOI: 10.1109/IEEE-IWS.2015.7164543
Sai-Qiong Zhou, Kun-Hsun Liao, Jiao He, E. Li
{"title":"Investigation of the attenuation characteristics of radio signal in ruins","authors":"Sai-Qiong Zhou, Kun-Hsun Liao, Jiao He, E. Li","doi":"10.1109/IEEE-IWS.2015.7164543","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2015.7164543","url":null,"abstract":"Due to the increasing of natural disasters, a novel localization system for search and rescue would be developed. Considering the popularity of mobile phones, the radio signal generated by the mobile devices can be utilized for rescue and localization. This paper presents a phone-based localization system for search and rescue purpose and the studies of radio channel characteristics through both theoretical and experimental research. In consideration of substantial obstacles in ruins, the radio channel will induce a complicated attenuation. The transmission of plane wave through a homogeneous and isotropic dielectric layer is theoretically investigated, and the measurements of channel frequency response are conducted to study the channel propagation characteristics, and to analyze the penetrating loss caused by the ceramic.","PeriodicalId":164534,"journal":{"name":"2015 IEEE International Wireless Symposium (IWS 2015)","volume":"138 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123226543","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
Ultra-low phase-noise VCO for microwave/MM-wave point-to-point backhaul communication 超低相位噪声压控振荡器用于微波/毫米波点对点回程通信
2015 IEEE International Wireless Symposium (IWS 2015) Pub Date : 2015-07-27 DOI: 10.1109/IEEE-IWS.2015.7164564
Lin Jin, Xun Luo
{"title":"Ultra-low phase-noise VCO for microwave/MM-wave point-to-point backhaul communication","authors":"Lin Jin, Xun Luo","doi":"10.1109/IEEE-IWS.2015.7164564","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2015.7164564","url":null,"abstract":"In this paper, an ultra-low phase-noise VCO operating from 2.619 to 2.996 GHz, destined for P2P backhaul communications, is proposed and realized in IBM 0.13-um SiGe process. The VCO uses a differential Colpitts topology with thick-oxide PMOS transistors. 5-bit digitally controlled capacitor array and hyper-abrupt varactors with MIM capacitors are employed for coarse and fine tuning, respectively, which ensure low phase noise across frequency bands. A new stacked-stepped-impedance (SSI) inductor with an enhanced Q factor for low-loss passive components is proposed. The VCO phase noise is thus minimized such that the start-up condition is easy to satisfy with low power consumption. The measured phase noise is a record-low -113.1 dBc/Hz and -135.7 dBc/Hz at 100 kHz and 1 MHz, respectively, from 2.996 GHz carrier. Its FoM of 190.4 dB at 100 kHz offset is the best ever reported. The total power consumption of the VCO is 30 mW.","PeriodicalId":164534,"journal":{"name":"2015 IEEE International Wireless Symposium (IWS 2015)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123865398","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
A broadband dual-polarized planar printed dipole fed by a vertical printed balun 由垂直印刷平衡轮供给的宽带双极化平面印刷偶极子
2015 IEEE International Wireless Symposium (IWS 2015) Pub Date : 2015-07-27 DOI: 10.1109/IEEE-IWS.2015.7164525
Yinyan Chen, Y. Ge, Guogang Li
{"title":"A broadband dual-polarized planar printed dipole fed by a vertical printed balun","authors":"Yinyan Chen, Y. Ge, Guogang Li","doi":"10.1109/IEEE-IWS.2015.7164525","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2015.7164525","url":null,"abstract":"In this paper, a wideband planar dual-polarized dipole with two pairs of T-shape loadings is designed for the base-station antennas. The proposed planar dipole has a vertically printed feeding balun, easy to be fabricated and mounted. The bandwidth of traditional printed dipole can be enhanced and the profile can be reduced. Two such dipoles are cross arranged to realize a dual-polarized antenna. Simulations show that the proposed dipole antenna can provide a bandwidth of 79.2% for VSWR<;2 and 67.3% for VSWR<;1.5, while good radiation performance over the operating band is also obtained.","PeriodicalId":164534,"journal":{"name":"2015 IEEE International Wireless Symposium (IWS 2015)","volume":"03 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129995163","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
Graph drawing based WLAN indoor mapping and localization using signal correlation via edge detection 基于图形绘制的无线局域网室内映射和定位，通过边缘检测利用信号相关
2015 IEEE International Wireless Symposium (IWS 2015) Pub Date : 2015-07-27 DOI: 10.1109/IEEE-IWS.2015.7164524
Mu Zhou, Qiao Zhang, Z. Tian, Kunjie Xu, Feng Qiu, Qi Wu
{"title":"Graph drawing based WLAN indoor mapping and localization using signal correlation via edge detection","authors":"Mu Zhou, Qiao Zhang, Z. Tian, Kunjie Xu, Feng Qiu, Qi Wu","doi":"10.1109/IEEE-IWS.2015.7164524","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2015.7164524","url":null,"abstract":"In indoor Wireless Local Area Network (WLAN) localization, the Received Signal Strength (RSS) fingerprinting involved in fingerprint based localization is always time-consuming and labor intensive. To solve this problem, we propose a novel indoor mapping and localization approach by using the spectral clustered time-stamped WLAN RSS measurements to conduct indoor mapping, as well as locate the target. Specifically, we rely on the off-the-shelf smartphones to sporadically collect a batch of WLAN RSS sequences in target environment, and then perform spectral clustering on the RSS sequences to construct cluster graphs. Furthermore, by using the orthogonal algorithm in graph drawing, we represent each cluster graph in a more readable manner. After that, the edge detection approach in image is adopted to form the unique logic graph. Finally, we conduct indoor mapping from the logic graph to ground-truth graph. The experimental results prove that our approach can not only effectively characterize the environment, but also provide satisfactory localization accuracy.","PeriodicalId":164534,"journal":{"name":"2015 IEEE International Wireless Symposium (IWS 2015)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128074299","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
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