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4/spl times/4 MIMO transceivers for civilian wireless communications 4/spl倍/4 MIMO收发器用于民用无线通信
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615153
R. Spring, L. Zhou, A. Daryoush
{"title":"4/spl times/4 MIMO transceivers for civilian wireless communications","authors":"R. Spring, L. Zhou, A. Daryoush","doi":"10.1109/RWS.2006.1615153","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615153","url":null,"abstract":"This paper presents the implementation and characterization of a 4/spl times/4 multiple input multiple output (MIMO) RF transceiver that operates at ISM frequency band of 2.45 GHz. The design is implemented using low cost commercially available off-the-shelf components (COTS). The system benefits from direct conversion transceiver units, a common phase-locked loop oscillator, a linear 1/spl times/4 antenna array, and self-contained power supply. The transceiver measurements indicate a good overall system performance in terms of dynamic range and constellation diagram (QPSK and 8PSK modulation formats) for both transmit and receive modes.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132156979","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
Smart antennas: overview of research in SMARAD 智能天线:SMARAD研究综述
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615162
A. Raisanen, P. Vainikainen, S. Tretyakov, V. Koivunen, T. Laakso
{"title":"Smart antennas: overview of research in SMARAD","authors":"A. Raisanen, P. Vainikainen, S. Tretyakov, V. Koivunen, T. Laakso","doi":"10.1109/RWS.2006.1615162","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615162","url":null,"abstract":"This paper gives a brief introduction to research related to smart antennas in the Smart and Novel Radios Research Unit (SMARAD) of Helsinki University of Technology. Research topics include MIMO systems, power amplifier modeling, novel artificial materials and structures, etc","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"188 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128184731","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 fully integrated 1 V, +9.5 dBm, 43%-PAE injection-locked Class-E power amplifier for wireless sensor network 全集成1v， +9.5 dBm, 43%-PAE注入锁定e类功率放大器，用于无线传感器网络
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615138
Hyoung-Seok Oh, Taeksang Song, Sang-Hyun Baek, E. Yoon, C. Kim
{"title":"A fully integrated 1 V, +9.5 dBm, 43%-PAE injection-locked Class-E power amplifier for wireless sensor network","authors":"Hyoung-Seok Oh, Taeksang Song, Sang-Hyun Baek, E. Yoon, C. Kim","doi":"10.1109/RWS.2006.1615138","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615138","url":null,"abstract":"In most short-range wireless sensor network applications, the maximum transmit-power is typically about 10 dBm at 2.4 GHz ISM band. In such a low transmit-power level, the driving power and DC power consumption in the previous stage are no more negligible compared to the transmitted signal power. So, to increase the overall transmitter efficiency, not only the output power stage, but also the driver stage needs to be co-optimized for low power operation. In this paper, we present an injection-locked Class-E power amplifier (Class-E ILPA) suitable for the low transmit-power sensor network applications. The proposed power amplifier, which is fully integrated in 0.18 /spl mu/m CMOS technology, achieves a power added efficiency (PAE) of 43% while delivering an output power of 9.5 dBm with a drain efficiency (DE) of 48.5% at 1 V supply voltage.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"48 5 Suppl 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128198170","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
Retrodirective array using direct down-conversion and fixed point DSP for duplex digital communications 采用直接下变频和定点DSP的反向定向阵列实现双工数字通信
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615163
C. Loadman, Z. Chen
{"title":"Retrodirective array using direct down-conversion and fixed point DSP for duplex digital communications","authors":"C. Loadman, Z. Chen","doi":"10.1109/RWS.2006.1615163","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615163","url":null,"abstract":"Adaptive and multi-antenna systems will be an integrated part of the future wireless world. In this paper, a novel low cost implementation of a self phased retrodirective array using direct RF conversion and coherent digital modulation in the uplink and downlink is presented. The transceiver is designed to receive and demodulate digital signals of arbitrary modulation type up to 100 ksymbols/s while at the same time directs its main beam back in the direction of the source using any vector digital modulation scheme at speeds up to 20 ksymbols/s. A direct conversion receiver is employed here in combination with a low-power fixed point digital signal processor, eliminating the need for an IF modulator and carrier recovery unit, this makes the design particularly attractive for a commercial application. Measured results of the uplink antenna pattern are presented and show the system has good retro directivity with beam pointing error less than three degrees in the angular range of -45 degrees to +45 degrees.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116858657","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
A 90 nm CMOS receiver front-end for GSM/GPRS/EDGE 用于GSM/GPRS/EDGE的90 nm CMOS接收器前端
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615109
S. Fang, F. Dulger, A. Bellaouar, M. Frechette
{"title":"A 90 nm CMOS receiver front-end for GSM/GPRS/EDGE","authors":"S. Fang, F. Dulger, A. Bellaouar, M. Frechette","doi":"10.1109/RWS.2006.1615109","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615109","url":null,"abstract":"A GSM/GPRS/EDGE receiver front-end realized in 90 nm CMOS technology is presented. With a low power of 46 mW, it achieved 31.5 dB gain, 2.1 dB integrated noise figure, 5 dB of noise figure under blocking condition and -9.5 dBm of inband IIP3. The measured LO leakage at the LNA input is 125 dBm. Total active area occupies 1.4 mm/sup 2/.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123207946","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
Estimation and compensation of TX and RX IQ imbalance in OFDM-based MIMO systems 基于ofdm的MIMO系统中TX和RX IQ不平衡的估计与补偿
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615133
T. Schenk, Peter F. M. Smulders, E. Fledderus
{"title":"Estimation and compensation of TX and RX IQ imbalance in OFDM-based MIMO systems","authors":"T. Schenk, Peter F. M. Smulders, E. Fledderus","doi":"10.1109/RWS.2006.1615133","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615133","url":null,"abstract":"This paper studies the influence, estimation and digital compensation of IQ imbalance at both transmitter and receiver side of a multiple-input multiple-output (MIMO) OFDM system. Hereto a preamble is designed, which enables simultaneous estimation of the channel and imbalance parameters. New estimation approaches for TX, RX and joint TX and RX IQ imbalance in MIMO OFDM systems are proposed and evaluated. Results from a numerical study show that all three proposed compensation approaches are able to significantly suppress the influence of IQ mismatch.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122629094","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: 58
Space-filling curve RFID tags 空间填充曲线RFID标签
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615129
J. McVay, A. Hoorfar, N. Engheta
{"title":"Space-filling curve RFID tags","authors":"J. McVay, A. Hoorfar, N. Engheta","doi":"10.1109/RWS.2006.1615129","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615129","url":null,"abstract":"A completely passive radio frequency tag is proposed, utilizing the scattering from electrically small but resonant inclusions. When placing these space-filling curve inclusions in an array and scaling each element within the array such that each element has its own separate resonant frequency, a radio frequency barcode can be developed from the radar cross section of the array. The narrow bandwidth inherent to such inclusions can be helpful in packing the overall signature into a relatively small frequency spectrum. Such radio frequency tags may have potential use in some applications of radio frequency identification systems.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130054485","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: 140
Improved EER transmitters for WLAN 改进的无线局域网EER发射机
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615139
T. Nesimoglu, K.A. Morris, S. Parker, J. Mcgeehan
{"title":"Improved EER transmitters for WLAN","authors":"T. Nesimoglu, K.A. Morris, S. Parker, J. Mcgeehan","doi":"10.1109/RWS.2006.1615139","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615139","url":null,"abstract":"The envelope elimination and restoration (EER) transmitter architecture is capable of providing high power efficiency without compromising linearity. This paper shows that for a wireless local area network (WLAN) application, the envelope reconstruction process modulates the supply voltage of the switching amplifier over a large dynamic range. This introduces sufficient nonlinearity to violate emission specifications. Fortunately, the EER architecture can be improved by applying envelope and phase feedback. The phase feedback architecture satisfies the emission specifications of IEEE 802.11a, while envelope feedback provides modest adjacent channel power ratio (ACPR) improvement. The impact of clipping on the ACPR and error vector magnitude (EVM) is also investigated. It is shown that for a WLAN application, a clipping of only 1 dB can be tolerated before the output signal is degraded significantly.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130098597","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
Design of a dual frequency oscillator for simultaneous multi-band radio communication on a multi-layer liquid crystalline polymer substrate 多层液晶聚合物基板上多波段无线电通信双频振荡器的设计
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615187
A. Bavisi, V. Sundaram, M. Swaminathan, S. Dalmia, G. White
{"title":"Design of a dual frequency oscillator for simultaneous multi-band radio communication on a multi-layer liquid crystalline polymer substrate","authors":"A. Bavisi, V. Sundaram, M. Swaminathan, S. Dalmia, G. White","doi":"10.1109/RWS.2006.1615187","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615187","url":null,"abstract":"This paper presents the design of a dual frequency oscillator that simultaneously generates two signals of different frequencies. The dual frequency oscillator was implemented in a novel multi-layer laminate-type process technology that uses multiple layers of liquid crystalline polymer (LCP) substrate. The oscillator core employs one lumped-element second-order resonator and one lumped-element fourth-order resonator to generate 1.79 GHz and 900 MHz synchronous signals. The silicon-bipolar based dual frequency oscillator utilizes the broad-band nature of the Qs of the passives in LCP to generate signals that are spaced at least one octave away from each other","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125411831","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
1.5 kW solid-state pulsed microwave power amplifier for S-band radar application 用于s波段雷达的1.5 kW固态脉冲微波功率放大器
2006 IEEE Radio and Wireless Symposium Pub Date : 2006-04-10 DOI: 10.1109/RWS.2006.1615122
J. Joo, G. Choi, S. Jang, J.J. Choi, D. M. Park
{"title":"1.5 kW solid-state pulsed microwave power amplifier for S-band radar application","authors":"J. Joo, G. Choi, S. Jang, J.J. Choi, D. M. Park","doi":"10.1109/RWS.2006.1615122","DOIUrl":"https://doi.org/10.1109/RWS.2006.1615122","url":null,"abstract":"This paper describes the design and performance of a 1.5 kW solid-state pulsed power amplifier, operating over 2.7-2.9 GHz at a duty of 10 percent and with a pulse width of 100 us for radar application. The solid-state pulsed power amplifier configures a series of 8-stage cascaded power amplifiers with different RF output power levels. Low loss Wilkinson combiners are used to combine output powers of six 300 W high power solid state modules. Tests show peak output power of 1.61 kW, corresponding to PAE of 26.2 % over 2.7-2.9 GHz with a pulse width of 100 us and a PRF of 1 kHz.","PeriodicalId":244560,"journal":{"name":"2006 IEEE Radio and Wireless Symposium","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125565053","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
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