Pub Date : 2015-12-21DOI: 10.1109/COMCAS.2015.7360356
A. Dyskin, I. Kallfass
Field effect transistor (FET) or bipolar junction transistor (BJT) based circuits, involving emitter/source degeneration by any general impedance are widely known for their positive effects on circuit performance. The circuit's behavior like input-output impedances, trans-admittance, voltage and power gains of such topologies are well known. In this paper, we propose to analyze the topology by looking at it as a local series-series feedback. The validity of the approach is demonstrated on RF CMOS 0.18 μm TowerJazz commercial process. This method, based on the negative feedback analysis, gives an instructive insight on the advantages of using source degeneration in analog and microwave circuits.
{"title":"Source degeneration as series-series feedback","authors":"A. Dyskin, I. Kallfass","doi":"10.1109/COMCAS.2015.7360356","DOIUrl":"https://doi.org/10.1109/COMCAS.2015.7360356","url":null,"abstract":"Field effect transistor (FET) or bipolar junction transistor (BJT) based circuits, involving emitter/source degeneration by any general impedance are widely known for their positive effects on circuit performance. The circuit's behavior like input-output impedances, trans-admittance, voltage and power gains of such topologies are well known. In this paper, we propose to analyze the topology by looking at it as a local series-series feedback. The validity of the approach is demonstrated on RF CMOS 0.18 μm TowerJazz commercial process. This method, based on the negative feedback analysis, gives an instructive insight on the advantages of using source degeneration in analog and microwave circuits.","PeriodicalId":431569,"journal":{"name":"2015 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS)","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122542489","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}
Pub Date : 2015-12-21DOI: 10.1109/COMCAS.2015.7360366
S. Churkin, L. Anishchenko
We present a new type of sensor for vital signs monitoring. The primary advantages of the millimeter-wave radar are ability to operate remotely, without electrodes or wires and through any clothing or fur. Since radar carrier wavelength is about 3 mm, we achieve significant noise immunity, sensitivity and accuracy. Thus it is not only detector, but a powerful tool for exploring heart and respiration mechanics. Series of lab tests with animals (rat, rabbit) and human were carried out. Experimental human heartbeat measurement data for monitoring distance of 2 meters is shown and compared to data from a commercial portable ECG device.
{"title":"Millimeter-wave radar for vital signs monitoring","authors":"S. Churkin, L. Anishchenko","doi":"10.1109/COMCAS.2015.7360366","DOIUrl":"https://doi.org/10.1109/COMCAS.2015.7360366","url":null,"abstract":"We present a new type of sensor for vital signs monitoring. The primary advantages of the millimeter-wave radar are ability to operate remotely, without electrodes or wires and through any clothing or fur. Since radar carrier wavelength is about 3 mm, we achieve significant noise immunity, sensitivity and accuracy. Thus it is not only detector, but a powerful tool for exploring heart and respiration mechanics. Series of lab tests with animals (rat, rabbit) and human were carried out. Experimental human heartbeat measurement data for monitoring distance of 2 meters is shown and compared to data from a commercial portable ECG device.","PeriodicalId":431569,"journal":{"name":"2015 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS)","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122694043","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}
Pub Date : 2015-12-21DOI: 10.1109/COMCAS.2015.7360355
S. Spiegel, Lior Blanka, Haim Kupershmidh, Haim Ben Sinour, Yaki Abecasis, A. Levi, Moshe Haiut
This article describes an implementation approach for the RF interference cancellation technique in full duplex wireless systems. A detailed analysis of the impairments in the RF system and the implementation of the RF interference cancellation are presented. Measurement results indicate more than 50dB suppression of the RF interference in static environments, considering a 1.9 GHz interference signal with 5 MHz bandwidth. In practice, due to multiple RF impairments in dynamic environments, an average interference cancellation of 35 dB is expected.
{"title":"Radio frequency interference cancellation in wireless communication systems","authors":"S. Spiegel, Lior Blanka, Haim Kupershmidh, Haim Ben Sinour, Yaki Abecasis, A. Levi, Moshe Haiut","doi":"10.1109/COMCAS.2015.7360355","DOIUrl":"https://doi.org/10.1109/COMCAS.2015.7360355","url":null,"abstract":"This article describes an implementation approach for the RF interference cancellation technique in full duplex wireless systems. A detailed analysis of the impairments in the RF system and the implementation of the RF interference cancellation are presented. Measurement results indicate more than 50dB suppression of the RF interference in static environments, considering a 1.9 GHz interference signal with 5 MHz bandwidth. In practice, due to multiple RF impairments in dynamic environments, an average interference cancellation of 35 dB is expected.","PeriodicalId":431569,"journal":{"name":"2015 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS)","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132764982","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}
Pub Date : 2015-12-21DOI: 10.1109/COMCAS.2015.7360445
J. Elkind, E. Socher
This paper presents three single balanced down-converting mixer designs in CMOS 65 nm technology. The three designs operate at 95 GHz and reach a maximum conversion gain of 8, 6.9 and 10.2 dB respectively. Due to the use of single balanced topology, the designs occupy a relatively small core area of 0.89×0.51, 0.078×0.14 and 0.053×0.17 mm2 and their DC power consumption is only 26, 29 and 12.4 mW.
{"title":"95 GHz down converting mixers in CMOS 65 nm technology","authors":"J. Elkind, E. Socher","doi":"10.1109/COMCAS.2015.7360445","DOIUrl":"https://doi.org/10.1109/COMCAS.2015.7360445","url":null,"abstract":"This paper presents three single balanced down-converting mixer designs in CMOS 65 nm technology. The three designs operate at 95 GHz and reach a maximum conversion gain of 8, 6.9 and 10.2 dB respectively. Due to the use of single balanced topology, the designs occupy a relatively small core area of 0.89×0.51, 0.078×0.14 and 0.053×0.17 mm2 and their DC power consumption is only 26, 29 and 12.4 mW.","PeriodicalId":431569,"journal":{"name":"2015 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS)","volume":"290 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134527264","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}
Pub Date : 2015-12-21DOI: 10.1109/COMCAS.2015.7360494
I. Kallfass, P. Harati, I. Dan, J. Antes, F. Boes, S. Rey, T. Merkle, S. Wagner, H. Massler, A. Tessmann, A. Leuther
This contribution presents a full chip set dedicated to high data rate indoor wireless communication at a carrier frequency of 300 GHz. The analog frontend consists of a three-chip solution, namely a transmitter, receiver and local oscillator frequency multiplier. The active millimeter-wave monolithic integrated circuits are realized in a GaAs-based metamorphic high electron mobility transistor technology. The transmitter MMIC achieves a maximum output power of 3.6 dBm and an RF frequency range of 270 to 314 GHz. The receiver MMIC shows 11.4 dB conversion gain without IF amplification in an RF frequency range from 292 to 314 GHz.
{"title":"MMIC chipset for 300 GHz indoor wireless communication","authors":"I. Kallfass, P. Harati, I. Dan, J. Antes, F. Boes, S. Rey, T. Merkle, S. Wagner, H. Massler, A. Tessmann, A. Leuther","doi":"10.1109/COMCAS.2015.7360494","DOIUrl":"https://doi.org/10.1109/COMCAS.2015.7360494","url":null,"abstract":"This contribution presents a full chip set dedicated to high data rate indoor wireless communication at a carrier frequency of 300 GHz. The analog frontend consists of a three-chip solution, namely a transmitter, receiver and local oscillator frequency multiplier. The active millimeter-wave monolithic integrated circuits are realized in a GaAs-based metamorphic high electron mobility transistor technology. The transmitter MMIC achieves a maximum output power of 3.6 dBm and an RF frequency range of 270 to 314 GHz. The receiver MMIC shows 11.4 dB conversion gain without IF amplification in an RF frequency range from 292 to 314 GHz.","PeriodicalId":431569,"journal":{"name":"2015 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128854369","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}
Pub Date : 2015-12-21DOI: 10.1109/COMCAS.2015.7360452
Emmanouil A. Antonopoulos, F. Plessas, F. Foukalas, Ioannis Zographopoulos
This paper presents the design and simulation of an RF prototype that can provide dynamic carrier aggregation (CA) in future cognitive heterogeneous cellular networks including also access to heterogeneous technologies. To this end, the proposed RF prototype can support heterogeneous multi-band CA scenarios with up to 3-band CA including unlicensed bands. Among other features, cognitive radio capabilities are incorporated to this prototype like spectrum sensing using energy detectors and dynamic CA using switches among the RF chains. The proposed architecture is evaluated in this paper highlighting useful insights of the proposed design. Our future work is to develop the proposed architecture using particular hardware components as an implementation within the framework of SOLDER FP7 project.
{"title":"Heterogeneous spectrum bands aggregation prototype with cognitive radio capabilities","authors":"Emmanouil A. Antonopoulos, F. Plessas, F. Foukalas, Ioannis Zographopoulos","doi":"10.1109/COMCAS.2015.7360452","DOIUrl":"https://doi.org/10.1109/COMCAS.2015.7360452","url":null,"abstract":"This paper presents the design and simulation of an RF prototype that can provide dynamic carrier aggregation (CA) in future cognitive heterogeneous cellular networks including also access to heterogeneous technologies. To this end, the proposed RF prototype can support heterogeneous multi-band CA scenarios with up to 3-band CA including unlicensed bands. Among other features, cognitive radio capabilities are incorporated to this prototype like spectrum sensing using energy detectors and dynamic CA using switches among the RF chains. The proposed architecture is evaluated in this paper highlighting useful insights of the proposed design. Our future work is to develop the proposed architecture using particular hardware components as an implementation within the framework of SOLDER FP7 project.","PeriodicalId":431569,"journal":{"name":"2015 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127769148","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}
Pub Date : 2015-12-21DOI: 10.1109/COMCAS.2015.7360368
M. Paun, I. Candel, R. Tamas, C. Ioana, I. Marghescu
In this paper we present a Software-Defined Radio approach for an Electric Arc locator system. The core of the proposed hardware implementation is the USRP (Universal Software Radio Peripheral) development platform. The novelty of this work lies in the application of telecommunication specific advanced signal processing methods in the field of energy generation and transmission. The main advantage of the proposed solution compared to other similar implementations is its flexibility and adaptability to variable working conditions provided by the Software-Defined Radio architecture.
{"title":"A Software-Defined Radio approach for locating Electric Arcs","authors":"M. Paun, I. Candel, R. Tamas, C. Ioana, I. Marghescu","doi":"10.1109/COMCAS.2015.7360368","DOIUrl":"https://doi.org/10.1109/COMCAS.2015.7360368","url":null,"abstract":"In this paper we present a Software-Defined Radio approach for an Electric Arc locator system. The core of the proposed hardware implementation is the USRP (Universal Software Radio Peripheral) development platform. The novelty of this work lies in the application of telecommunication specific advanced signal processing methods in the field of energy generation and transmission. The main advantage of the proposed solution compared to other similar implementations is its flexibility and adaptability to variable working conditions provided by the Software-Defined Radio architecture.","PeriodicalId":431569,"journal":{"name":"2015 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131083051","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}
Pub Date : 2015-12-21DOI: 10.1109/COMCAS.2015.7360394
Eran Greenberg, Edmund Klodzh
The knowledge of wireless propagation channel behavior is essential for coverage determination and for radio network planning in urban environments. In this paper the ability of deterministic, empirical and physical models to predict the received power is investigated. A few test drives were performed to measure the received power in two different urban environments, in order to estimate the prediction ability of urban propagation models. The results show that deterministic ray-tracing, even with site specific digital terrain elevation data and a buildings layer, does not always provide more accurate predictions than empirical and physical models.
{"title":"Comparison of deterministic, empirical and physical propagation models in urban environments","authors":"Eran Greenberg, Edmund Klodzh","doi":"10.1109/COMCAS.2015.7360394","DOIUrl":"https://doi.org/10.1109/COMCAS.2015.7360394","url":null,"abstract":"The knowledge of wireless propagation channel behavior is essential for coverage determination and for radio network planning in urban environments. In this paper the ability of deterministic, empirical and physical models to predict the received power is investigated. A few test drives were performed to measure the received power in two different urban environments, in order to estimate the prediction ability of urban propagation models. The results show that deterministic ray-tracing, even with site specific digital terrain elevation data and a buildings layer, does not always provide more accurate predictions than empirical and physical models.","PeriodicalId":431569,"journal":{"name":"2015 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134480131","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}
Pub Date : 2015-12-21DOI: 10.1109/COMCAS.2015.7360437
Zaijun Hua, Xiangning Fan, Li Tang
An orthogonal frequency division multiplexing transmitter based on multi-bit delta sigma modulator with switch mode power amplifiers is presented. Multi-bit up-conversion mixer and power amplifiers are revealed. With a 3-bit delta sigma modulator, an IEEE 802.11a based transmitter is simulated. Results show that the error vector magnitude of this transmitter achieves -20.74dB for 64-QAM. With up to +10% gain imbalance for the most significant bit, the transmitter's accuracy degrades 1.5dB.
{"title":"Digital OFDM transmitter based on multi-bit delta sigma modulator","authors":"Zaijun Hua, Xiangning Fan, Li Tang","doi":"10.1109/COMCAS.2015.7360437","DOIUrl":"https://doi.org/10.1109/COMCAS.2015.7360437","url":null,"abstract":"An orthogonal frequency division multiplexing transmitter based on multi-bit delta sigma modulator with switch mode power amplifiers is presented. Multi-bit up-conversion mixer and power amplifiers are revealed. With a 3-bit delta sigma modulator, an IEEE 802.11a based transmitter is simulated. Results show that the error vector magnitude of this transmitter achieves -20.74dB for 64-QAM. With up to +10% gain imbalance for the most significant bit, the transmitter's accuracy degrades 1.5dB.","PeriodicalId":431569,"journal":{"name":"2015 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129039400","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}
This paper introduces our recently upgraded Ka-band two-receiving-channel radar system, which adopts stepped-frequency chirp signal (SFCS) and the signal spans 2GHz bandwidth. The upgrading include the two-channel dechirping-on-receiving receiver and the data sampling and recording subsystem where high-speed optical transmission technique is used. We use two arbitrary waveform generators in the system, one for transmitting and another one for receiving, which provides us a great convenience for transmitting / receiving design. We briefly introduce the system design as well as discuss about the pulse compressing algorithm. In the outdoor experiment, buses, trucks and trains were taken as the ground moving targets to image and high-resolution images were obtained. The micro-Doppler phenomenon resulted from the rolling wheels is investigated.
{"title":"A Ka-band high-resolution radar system and ground moving target imaging experiment","authors":"Yunhua Zhang, Xiang Gu, Xiao Dong, W. Zhai, Xueyan Kang, Yueying Tang","doi":"10.1109/COMCAS.2015.7360421","DOIUrl":"https://doi.org/10.1109/COMCAS.2015.7360421","url":null,"abstract":"This paper introduces our recently upgraded Ka-band two-receiving-channel radar system, which adopts stepped-frequency chirp signal (SFCS) and the signal spans 2GHz bandwidth. The upgrading include the two-channel dechirping-on-receiving receiver and the data sampling and recording subsystem where high-speed optical transmission technique is used. We use two arbitrary waveform generators in the system, one for transmitting and another one for receiving, which provides us a great convenience for transmitting / receiving design. We briefly introduce the system design as well as discuss about the pulse compressing algorithm. In the outdoor experiment, buses, trucks and trains were taken as the ground moving targets to image and high-resolution images were obtained. The micro-Doppler phenomenon resulted from the rolling wheels is investigated.","PeriodicalId":431569,"journal":{"name":"2015 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124803285","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}
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