Pub Date : 2003-10-15DOI: 10.1109/WCT.2003.1321572
Y. Wang, T. Itoh
The paper discusses the recently proposed smart antenna architecture based on the spatial multiplexing of local elements (SMILE) technique. A new method of reducing mutual coupling in the SMILE type smart antenna receiver is proposed. The new method utilizes the dynamic switching nature of the SMILE array feed network to reduce mutual coupling. It is shown that proper placement of the switching device in the feed network reduces the magnitude of the surface current on the patch elements not activated by the SMILE system. Through simulations, this reduction in current is shown to improve the active element pattern to nearly the ideal single element pattern. Furthermore, it is shown that the radiation patterns formed by the SMILE smart antenna array using this technique match extremely closely with ideal patterns predicted by theory.
{"title":"SMILE antenna arrays for wireless communication","authors":"Y. Wang, T. Itoh","doi":"10.1109/WCT.2003.1321572","DOIUrl":"https://doi.org/10.1109/WCT.2003.1321572","url":null,"abstract":"The paper discusses the recently proposed smart antenna architecture based on the spatial multiplexing of local elements (SMILE) technique. A new method of reducing mutual coupling in the SMILE type smart antenna receiver is proposed. The new method utilizes the dynamic switching nature of the SMILE array feed network to reduce mutual coupling. It is shown that proper placement of the switching device in the feed network reduces the magnitude of the surface current on the patch elements not activated by the SMILE system. Through simulations, this reduction in current is shown to improve the active element pattern to nearly the ideal single element pattern. Furthermore, it is shown that the radiation patterns formed by the SMILE smart antenna array using this technique match extremely closely with ideal patterns predicted by theory.","PeriodicalId":6305,"journal":{"name":"2003 IEEE Topical Conference on Wireless Communication Technology","volume":"136 1","pages":"390-391"},"PeriodicalIF":0.0,"publicationDate":"2003-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86304330","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 : 2003-10-15DOI: 10.1109/WCT.2003.1321608
R. Ramiz, N. Buzcu
Macro-cells are large areas with transmitter antennas well above the surrounding buildings and usually there is no direct visibility between the transmitter and the receiver (NLOS). For this purpose, in general, path loss models which consider uniform environmental characteristics are used, as well as the those that are suitable for homogenous urban environments. Istanbul has a complex geographical structure, and is established on seven hills and divided by the Bosphorus. Many old and new buildings with different height and size are located side by side, and there are various types of roads with random shapes and directions. Also, as Istanbul is not a flat area, the most commonly used macro-cell path loss models for GSM 900/1800 are not one to one applicable to UMTS systems. We define different macro-cell propagation models for each MS to MS, BS to MS, BS to BS, MS to BS communications case where the-buildings are assumed to be nearly uniform height, to ensure an efficient UMTS system. In order to improve the system performance, the most appropriate measurement procedure and measurement criteria are examined, as well as filtering intervals in association with handover mechanisms.
{"title":"Determination of a suitable macro-cell model for UMTS system in Istanbul","authors":"R. Ramiz, N. Buzcu","doi":"10.1109/WCT.2003.1321608","DOIUrl":"https://doi.org/10.1109/WCT.2003.1321608","url":null,"abstract":"Macro-cells are large areas with transmitter antennas well above the surrounding buildings and usually there is no direct visibility between the transmitter and the receiver (NLOS). For this purpose, in general, path loss models which consider uniform environmental characteristics are used, as well as the those that are suitable for homogenous urban environments. Istanbul has a complex geographical structure, and is established on seven hills and divided by the Bosphorus. Many old and new buildings with different height and size are located side by side, and there are various types of roads with random shapes and directions. Also, as Istanbul is not a flat area, the most commonly used macro-cell path loss models for GSM 900/1800 are not one to one applicable to UMTS systems. We define different macro-cell propagation models for each MS to MS, BS to MS, BS to BS, MS to BS communications case where the-buildings are assumed to be nearly uniform height, to ensure an efficient UMTS system. In order to improve the system performance, the most appropriate measurement procedure and measurement criteria are examined, as well as filtering intervals in association with handover mechanisms.","PeriodicalId":6305,"journal":{"name":"2003 IEEE Topical Conference on Wireless Communication Technology","volume":"12 1","pages":"469-470"},"PeriodicalIF":0.0,"publicationDate":"2003-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86595855","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 : 2003-10-15DOI: 10.1109/WCT.2003.1321534
M. K. Ozdemir, H. Arslan, E. Arvas
Wireless communication systems employing multielement antennas (MEAs) are affected by mutual coupling. Accurate and simple models of mutual coupling are essential for better system analysis. In a MEA, mutual coupling depends on the antenna element separation, geometry of array and antenna elements, location of antenna elements in the array, frequency, substrate thickness and constant, near-field scatterers, and direction of arrival (DOA) of the incoming wave. Except near-field scatterers and DOA, the rest of the parameters are fixed for a given MEA system. Since the feeding network for a MIMO system is fixed and most of the mutual coupling is due to surface waves, DOA dependency can be removed for a MIMO mutual coupling model. In this paper, a previously proposed model for mutual coupling is modified to be applicable to MIMO systems. The effect of near-field scatterers on the mutual coupling is specifically investigated to validate the model. Commercially available EM simulators are utilized for this purpose. Once the effect of near-field scatterers is characterized, correlation properties between antenna elements in a MEA can be obtained more accurately and correlation estimation algorithms can be developed accordingly.
{"title":"A mutual coupling model for MIMO systems","authors":"M. K. Ozdemir, H. Arslan, E. Arvas","doi":"10.1109/WCT.2003.1321534","DOIUrl":"https://doi.org/10.1109/WCT.2003.1321534","url":null,"abstract":"Wireless communication systems employing multielement antennas (MEAs) are affected by mutual coupling. Accurate and simple models of mutual coupling are essential for better system analysis. In a MEA, mutual coupling depends on the antenna element separation, geometry of array and antenna elements, location of antenna elements in the array, frequency, substrate thickness and constant, near-field scatterers, and direction of arrival (DOA) of the incoming wave. Except near-field scatterers and DOA, the rest of the parameters are fixed for a given MEA system. Since the feeding network for a MIMO system is fixed and most of the mutual coupling is due to surface waves, DOA dependency can be removed for a MIMO mutual coupling model. In this paper, a previously proposed model for mutual coupling is modified to be applicable to MIMO systems. The effect of near-field scatterers on the mutual coupling is specifically investigated to validate the model. Commercially available EM simulators are utilized for this purpose. Once the effect of near-field scatterers is characterized, correlation properties between antenna elements in a MEA can be obtained more accurately and correlation estimation algorithms can be developed accordingly.","PeriodicalId":6305,"journal":{"name":"2003 IEEE Topical Conference on Wireless Communication Technology","volume":"83 1","pages":"306-307"},"PeriodicalIF":0.0,"publicationDate":"2003-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88108301","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 : 2003-10-15DOI: 10.1109/WCT.2003.1321599
H. Harada, T. Sato, R. Kohno
Recently, a lot of attention has been paid to ultra wideband (UWB) wireless communications systems due to its potential to reach data rate in wireless communications. A UWB signal is defined as that whose bandwidth either surpasses 25% of its spectrum's center frequency or exceeds 1.5 GHz. The UWB communication systems is often referred to as impulse radio since such ultra wideband signal is composed of sub-nanosecond pulses. In addition to possibly enabling the implementation of high-speed wireless access with over 1 Gbit/s data-rules, UWB systems also have the potential to simplify the RF circuitry of the transceivers and lower the transmit power. Previous UWB-IR system proposals have used trains of Gaussian pulses at transmission, resulting, at the receiver. in waveforms known as the monocycle. In those schemes, a number of pulses are needed to transmit 1 bit of information. In this work, a system that transmits several bits per pulse, aimed at enhancing data rate, is studied. The pulse shape used on the UWB system is also studied. UWB pulses based on modified Hermite polynomials (MHP) have been proposed before. These pulses are orthogonal at the transmitter, but not at the receiver due to the differentiation effect of both transmit and receive antenna.
{"title":"Multivalued transmission system for UWB-CDMA using modified Hermite pulse shape","authors":"H. Harada, T. Sato, R. Kohno","doi":"10.1109/WCT.2003.1321599","DOIUrl":"https://doi.org/10.1109/WCT.2003.1321599","url":null,"abstract":"Recently, a lot of attention has been paid to ultra wideband (UWB) wireless communications systems due to its potential to reach data rate in wireless communications. A UWB signal is defined as that whose bandwidth either surpasses 25% of its spectrum's center frequency or exceeds 1.5 GHz. The UWB communication systems is often referred to as impulse radio since such ultra wideband signal is composed of sub-nanosecond pulses. In addition to possibly enabling the implementation of high-speed wireless access with over 1 Gbit/s data-rules, UWB systems also have the potential to simplify the RF circuitry of the transceivers and lower the transmit power. Previous UWB-IR system proposals have used trains of Gaussian pulses at transmission, resulting, at the receiver. in waveforms known as the monocycle. In those schemes, a number of pulses are needed to transmit 1 bit of information. In this work, a system that transmits several bits per pulse, aimed at enhancing data rate, is studied. The pulse shape used on the UWB system is also studied. UWB pulses based on modified Hermite polynomials (MHP) have been proposed before. These pulses are orthogonal at the transmitter, but not at the receiver due to the differentiation effect of both transmit and receive antenna.","PeriodicalId":6305,"journal":{"name":"2003 IEEE Topical Conference on Wireless Communication Technology","volume":"81 1","pages":"451-452"},"PeriodicalIF":0.0,"publicationDate":"2003-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89616267","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 : 2003-10-15DOI: 10.1109/WCT.2003.1321413
H. Ogawa
Summary form only given. A novel millimeter-wave wireless access system developed by CRL Yokosuka Radio Communication Research Center is presented. First we discuss the Japanese 60 GHz standardization. Several applications are reviewed and one indoor application which can transmit a number of video channels is presented in detail. Heterodyne transmission techniques, which can reduce the cost of 60 GHz hardware, are proposed for indoor and outdoor millimeter-wave systems. Experimental results of the heterodyne transmission techniques are presented in terms of phase noise. Short-range type ad-hoc systems are proposed. Our idea has been proposed to IEEE 802.15 TG3a as an alternative PHY layer. The proposal is described. Fixed wireless access (FWA) systems utilize the advantages of millimeter-wave frequencies. The next-generation FWA system developed by CRL is discussed and new-frequency bands for FWA systems are proposed. CRL is now making a FWA testbed in the Yokosuka city area using 32 GHz, 38 GHz and 60 GHz bands. The configuration of the testbed is further presented and applications of FWA are discussed.
{"title":"Research trend of millimeter-wave systems and technologies at Communication Research Laboratory","authors":"H. Ogawa","doi":"10.1109/WCT.2003.1321413","DOIUrl":"https://doi.org/10.1109/WCT.2003.1321413","url":null,"abstract":"Summary form only given. A novel millimeter-wave wireless access system developed by CRL Yokosuka Radio Communication Research Center is presented. First we discuss the Japanese 60 GHz standardization. Several applications are reviewed and one indoor application which can transmit a number of video channels is presented in detail. Heterodyne transmission techniques, which can reduce the cost of 60 GHz hardware, are proposed for indoor and outdoor millimeter-wave systems. Experimental results of the heterodyne transmission techniques are presented in terms of phase noise. Short-range type ad-hoc systems are proposed. Our idea has been proposed to IEEE 802.15 TG3a as an alternative PHY layer. The proposal is described. Fixed wireless access (FWA) systems utilize the advantages of millimeter-wave frequencies. The next-generation FWA system developed by CRL is discussed and new-frequency bands for FWA systems are proposed. CRL is now making a FWA testbed in the Yokosuka city area using 32 GHz, 38 GHz and 60 GHz bands. The configuration of the testbed is further presented and applications of FWA are discussed.","PeriodicalId":6305,"journal":{"name":"2003 IEEE Topical Conference on Wireless Communication Technology","volume":"70 1","pages":"1-"},"PeriodicalIF":0.0,"publicationDate":"2003-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89976275","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 : 2003-10-15DOI: 10.1109/WCT.2003.1321453
J. Kim
Summary form only given. A turbo-coded ARQ scheme is analyzed and simulated for a CDMA packet radio system. The performance is evaluated in terms of packet error probability. The wireless channel is modeled as a slow Rayleigh fading channel. The simulation results are presented with the following varying parameters: (1) the number of iterations used in the decoding process, (2) interleaver length employed in the turbo encoder, and (3) standard deviation of shadowing to evaluate the effect of channel characteristics on performance. Finally, the comparative results are shown for the optimal and suboptimal approaches used in the turbo decoding process. For turbo decoding algorithms, the MAP, the Max-Log-MAP, and the SOVA algorithms are taken into account.
{"title":"Turbo-coded ARQ scheme for a CDMA packet radio system","authors":"J. Kim","doi":"10.1109/WCT.2003.1321453","DOIUrl":"https://doi.org/10.1109/WCT.2003.1321453","url":null,"abstract":"Summary form only given. A turbo-coded ARQ scheme is analyzed and simulated for a CDMA packet radio system. The performance is evaluated in terms of packet error probability. The wireless channel is modeled as a slow Rayleigh fading channel. The simulation results are presented with the following varying parameters: (1) the number of iterations used in the decoding process, (2) interleaver length employed in the turbo encoder, and (3) standard deviation of shadowing to evaluate the effect of channel characteristics on performance. Finally, the comparative results are shown for the optimal and suboptimal approaches used in the turbo decoding process. For turbo decoding algorithms, the MAP, the Max-Log-MAP, and the SOVA algorithms are taken into account.","PeriodicalId":6305,"journal":{"name":"2003 IEEE Topical Conference on Wireless Communication Technology","volume":"13 1","pages":"123-125"},"PeriodicalIF":0.0,"publicationDate":"2003-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88580045","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 : 2003-10-15DOI: 10.1109/WCT.2003.1321506
J. Bernhard, K. Hietpas, E. George, D. Kuchima, H. Reis
The nation's civil transportation infrastructure of structural concrete bridges is aging and deteriorating - principally as a result of the corrosion of the steel reinforcement that gives these structures their tensile strength. The primary objective of our research is to develop a cost-effective wireless embedded sensor system that detects the onset of corrosion and directly relates the sensor data to the deterioration of the girder's structural performance characteristics. Reaching this objective requires our multidisciplinary team to integrate the following three research thrusts: (1) non-destructive evaluation (NDE) of reinforcing tendons; (2) embedded wireless sensors; (3) diagnostic tool development that relates sensor data to changes in structural performance characteristics. In cooperation with the Illinois Department of Transportation, the research project will culminate with a field demonstration of the embedded sensor system installed in a prestressed girder.
{"title":"An interdisciplinary effort to develop a wireless embedded sensor system to monitor and assess corrosion in the tendons of prestressed concrete girders","authors":"J. Bernhard, K. Hietpas, E. George, D. Kuchima, H. Reis","doi":"10.1109/WCT.2003.1321506","DOIUrl":"https://doi.org/10.1109/WCT.2003.1321506","url":null,"abstract":"The nation's civil transportation infrastructure of structural concrete bridges is aging and deteriorating - principally as a result of the corrosion of the steel reinforcement that gives these structures their tensile strength. The primary objective of our research is to develop a cost-effective wireless embedded sensor system that detects the onset of corrosion and directly relates the sensor data to the deterioration of the girder's structural performance characteristics. Reaching this objective requires our multidisciplinary team to integrate the following three research thrusts: (1) non-destructive evaluation (NDE) of reinforcing tendons; (2) embedded wireless sensors; (3) diagnostic tool development that relates sensor data to changes in structural performance characteristics. In cooperation with the Illinois Department of Transportation, the research project will culminate with a field demonstration of the embedded sensor system installed in a prestressed girder.","PeriodicalId":6305,"journal":{"name":"2003 IEEE Topical Conference on Wireless Communication Technology","volume":"13 1","pages":"241-243"},"PeriodicalIF":0.0,"publicationDate":"2003-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80894611","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 : 2003-10-15DOI: 10.1109/WCT.2003.1321493
R. Kirana, A. Sugiura
A simple, low-cost system is required for transmitting a child feedback image during experimentation on remote medical treatment. Therefore, we use Bluetooth wireless technology for remote medical care connection. The technology encompasses a simple, low-cost, low-power, global radio system for integration into mobile devices.
{"title":"Early detection of mentally retarded children by displaying face images using Bluetooth wireless technology","authors":"R. Kirana, A. Sugiura","doi":"10.1109/WCT.2003.1321493","DOIUrl":"https://doi.org/10.1109/WCT.2003.1321493","url":null,"abstract":"A simple, low-cost system is required for transmitting a child feedback image during experimentation on remote medical treatment. Therefore, we use Bluetooth wireless technology for remote medical care connection. The technology encompasses a simple, low-cost, low-power, global radio system for integration into mobile devices.","PeriodicalId":6305,"journal":{"name":"2003 IEEE Topical Conference on Wireless Communication Technology","volume":"57 1","pages":"208-209"},"PeriodicalIF":0.0,"publicationDate":"2003-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79234987","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 : 2003-10-15DOI: 10.1109/WCT.2003.1321415
S. Makino
Summary form only given, as follows. Mitsubishi Electric Corporation (MELCO) has developed many novel reflector antenna systems and made them practicable in co-operation with customers such as NTT (Nippon Telegraph and Telephone Corporation), KDD (Kolcusai Densin Denwa Corporation), NASDA (National Space Development Agency of Japan), ISAS (The Institute of Space and Astronautical Science), NAOJ (National Astronomical Observatory of Japan) and so on. The historical reflector antenna systems developed by MELCO are introduced in detail. Earth station antennas include: (1) first practical Cassegrain antenna; (2) first practical offset Cassegrain antenna; (3) offset Cassegrain antenna with elliptical beam; (4) Nobeyama 45 m radio telescope; (5) Usuda Deep Space Centre 64 m antenna; (6) dual beam Earth station antenna. Satellite antennas include: (1) shaped beam antennas; (2) multi-beam antennas; (3) dual overlapped gridded reflector antenna; (4) large deployable reflector antenna.
{"title":"Historical review of reflector antenna systems developed by MELCO","authors":"S. Makino","doi":"10.1109/WCT.2003.1321415","DOIUrl":"https://doi.org/10.1109/WCT.2003.1321415","url":null,"abstract":"Summary form only given, as follows. Mitsubishi Electric Corporation (MELCO) has developed many novel reflector antenna systems and made them practicable in co-operation with customers such as NTT (Nippon Telegraph and Telephone Corporation), KDD (Kolcusai Densin Denwa Corporation), NASDA (National Space Development Agency of Japan), ISAS (The Institute of Space and Astronautical Science), NAOJ (National Astronomical Observatory of Japan) and so on. The historical reflector antenna systems developed by MELCO are introduced in detail. Earth station antennas include: (1) first practical Cassegrain antenna; (2) first practical offset Cassegrain antenna; (3) offset Cassegrain antenna with elliptical beam; (4) Nobeyama 45 m radio telescope; (5) Usuda Deep Space Centre 64 m antenna; (6) dual beam Earth station antenna. Satellite antennas include: (1) shaped beam antennas; (2) multi-beam antennas; (3) dual overlapped gridded reflector antenna; (4) large deployable reflector antenna.","PeriodicalId":6305,"journal":{"name":"2003 IEEE Topical Conference on Wireless Communication Technology","volume":"397 1","pages":"4-"},"PeriodicalIF":0.0,"publicationDate":"2003-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79891328","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 : 2003-10-15DOI: 10.1109/WCT.2003.1321429
A. Georgiadis, R. Point
Design considerations and trade-offs for AC-coupled direct-conversion transceivers that suffer from 1/f noise are explored. CMOS technology provides a cost-effective solution for RF direct-conversion applications, but it suffers from 1/f noise. Theoretical bounds and simulation results were complemented by error vector magnitude (EVM) measurements on a differential CMOS LNA and mixer. The results verified that the system performance is less sensitive to the AC-coupling corner frequency than the 1/f corner frequency. Moreover, simulations showed that the effect of the AC-coupling corner frequency is less significant for lower SNR.
{"title":"Performance bounds and measurements for AC-coupled direct-conversion transceivers under the presence of 1/f noise","authors":"A. Georgiadis, R. Point","doi":"10.1109/WCT.2003.1321429","DOIUrl":"https://doi.org/10.1109/WCT.2003.1321429","url":null,"abstract":"Design considerations and trade-offs for AC-coupled direct-conversion transceivers that suffer from 1/f noise are explored. CMOS technology provides a cost-effective solution for RF direct-conversion applications, but it suffers from 1/f noise. Theoretical bounds and simulation results were complemented by error vector magnitude (EVM) measurements on a differential CMOS LNA and mixer. The results verified that the system performance is less sensitive to the AC-coupling corner frequency than the 1/f corner frequency. Moreover, simulations showed that the effect of the AC-coupling corner frequency is less significant for lower SNR.","PeriodicalId":6305,"journal":{"name":"2003 IEEE Topical Conference on Wireless Communication Technology","volume":"172 1","pages":"29-32"},"PeriodicalIF":0.0,"publicationDate":"2003-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76869335","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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