Pub Date : 2011-03-07DOI: 10.1109/RWS.2011.5725505
M. Scardelletti, N. Jastram, G. Ponchak, Rhonda R. Franklin
This paper presents for the first time measured characteristics of a planar monopole antenna placed directly on a high impedance electromagnetic surface or artificial magnetic conductor (AMC). The return loss and radiation patterns are compared between the antenna in free space, and when placed directly on a perfect electrical conductor (PEC), and on the AMC. The antenna measured in free space has a wide pass band from 3 to 10 GHz. The return loss for the antenna on the PEC is nearly all reflected back and the return loss for the antenna on the AMC has a 10 dB bandwidth from 7.5 to 9.5 GHz. The gain of the antenna in free space, on PEC and on AMC is 1, −12 and 10 dBi, respectively. This indicates that the AMC is working properly, sending all the radiation outward with little loss.
{"title":"Characteristics of planar monopole antenna on high impedance electromagnetic surface","authors":"M. Scardelletti, N. Jastram, G. Ponchak, Rhonda R. Franklin","doi":"10.1109/RWS.2011.5725505","DOIUrl":"https://doi.org/10.1109/RWS.2011.5725505","url":null,"abstract":"This paper presents for the first time measured characteristics of a planar monopole antenna placed directly on a high impedance electromagnetic surface or artificial magnetic conductor (AMC). The return loss and radiation patterns are compared between the antenna in free space, and when placed directly on a perfect electrical conductor (PEC), and on the AMC. The antenna measured in free space has a wide pass band from 3 to 10 GHz. The return loss for the antenna on the PEC is nearly all reflected back and the return loss for the antenna on the AMC has a 10 dB bandwidth from 7.5 to 9.5 GHz. The gain of the antenna in free space, on PEC and on AMC is 1, −12 and 10 dBi, respectively. This indicates that the AMC is working properly, sending all the radiation outward with little loss.","PeriodicalId":250672,"journal":{"name":"2011 IEEE Radio and Wireless Symposium","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115154162","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 : 2011-03-07DOI: 10.1109/RWS.2011.5725451
Z. Tong, A. Stelzer
This paper presents a practical method for extracting the S-parameters of a transition from a coupled microstrip line to a rectangular waveguide. By utilizing three standards (load, reflect, delayed reflect) for the waveguide port, the S-parameters (in both differential and common modes) of the transition can be calculated. A wide-band transition was tested to validate the calculation, and the results were in good agreement with expectations. This method is generic in the sense that it is suitable for other kinds of transitions, for instance, coplanar waveguide to waveguide, or coaxial line to waveguide, etc.
{"title":"S-parameters extraction for wide-band transition from coupled microstrip line to waveguide by the LRdR method","authors":"Z. Tong, A. Stelzer","doi":"10.1109/RWS.2011.5725451","DOIUrl":"https://doi.org/10.1109/RWS.2011.5725451","url":null,"abstract":"This paper presents a practical method for extracting the S-parameters of a transition from a coupled microstrip line to a rectangular waveguide. By utilizing three standards (load, reflect, delayed reflect) for the waveguide port, the S-parameters (in both differential and common modes) of the transition can be calculated. A wide-band transition was tested to validate the calculation, and the results were in good agreement with expectations. This method is generic in the sense that it is suitable for other kinds of transitions, for instance, coplanar waveguide to waveguide, or coaxial line to waveguide, etc.","PeriodicalId":250672,"journal":{"name":"2011 IEEE Radio and Wireless Symposium","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122794551","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 : 2011-03-07DOI: 10.1109/RWS.2011.5725486
A. V. Nikitin
Impulsiveness, or a high degree of peakedness, of interchannel interference in digital communication systems typically results from the non-smooth nature of any physically realizable modulation scheme designed to transmit a discrete (discontinuous) message. Even modulation schemes painstakingly designed to be ‘smooth’ are not. The non-smoothness of the modulation can be caused by a variety of hardware non-idealities and, more fundamentally, by the very nature of any modulation scheme for digital communications. In order to transmit a discrete message, such a scheme must be causal and piecewise, and cannot be smooth, or infinitely differentiable. Recursive differentiation of a non-smooth transmitted signal eventually leads to discontinuities. When observed by an out-of-band receiver, the transmissions from these discontinuities may appear as strong transients with the peak power noticeably exceeding the average power, and the received signal will have a high degree of peakedness. This impulsive nature of the interference provides an opportunity to reduce its power.
{"title":"On the impulsive nature of interchannel interference in digital communication systems","authors":"A. V. Nikitin","doi":"10.1109/RWS.2011.5725486","DOIUrl":"https://doi.org/10.1109/RWS.2011.5725486","url":null,"abstract":"Impulsiveness, or a high degree of peakedness, of interchannel interference in digital communication systems typically results from the non-smooth nature of any physically realizable modulation scheme designed to transmit a discrete (discontinuous) message. Even modulation schemes painstakingly designed to be ‘smooth’ are not. The non-smoothness of the modulation can be caused by a variety of hardware non-idealities and, more fundamentally, by the very nature of any modulation scheme for digital communications. In order to transmit a discrete message, such a scheme must be causal and piecewise, and cannot be smooth, or infinitely differentiable. Recursive differentiation of a non-smooth transmitted signal eventually leads to discontinuities. When observed by an out-of-band receiver, the transmissions from these discontinuities may appear as strong transients with the peak power noticeably exceeding the average power, and the received signal will have a high degree of peakedness. This impulsive nature of the interference provides an opportunity to reduce its power.","PeriodicalId":250672,"journal":{"name":"2011 IEEE Radio and Wireless Symposium","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127767850","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 : 2011-03-07DOI: 10.1109/RWS.2011.5725461
Yuki Ota, Kyohei Ota, A. Kajiwara
Ultra-wideband impulse-radio (UWB-IR) has many advantages against video and narrowband microwave radio. In this paper, UWB-IR based microwave sensor watching for bathroom is suggested in order to prevent the accident caused by heat-shock and the performance is experimentally investigated using a vector network analyzer. It has been found from the measurement result that the use of UWB-IR is useful to estimate various dangerous situations such as heat shock in bath room.
{"title":"Empirical study of UWB-IR sensor watching for bathroom","authors":"Yuki Ota, Kyohei Ota, A. Kajiwara","doi":"10.1109/RWS.2011.5725461","DOIUrl":"https://doi.org/10.1109/RWS.2011.5725461","url":null,"abstract":"Ultra-wideband impulse-radio (UWB-IR) has many advantages against video and narrowband microwave radio. In this paper, UWB-IR based microwave sensor watching for bathroom is suggested in order to prevent the accident caused by heat-shock and the performance is experimentally investigated using a vector network analyzer. It has been found from the measurement result that the use of UWB-IR is useful to estimate various dangerous situations such as heat shock in bath room.","PeriodicalId":250672,"journal":{"name":"2011 IEEE Radio and Wireless Symposium","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126620904","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 : 2011-03-07DOI: 10.1109/RWS.2011.5725476
A. Haghighat, A. Helmy
Cooperative Communication enables a system to achieve a significant gain in coverage and capacity. In coded cooperation, channel coding is embedded in the cooperation strategy, and the optimal level of the cooperation between the nodes needs to be determined according to the channel conditions. Using RCPC codes, we propose an adaptive approach that relies on efficient reallocation of system resources. The implemented scheme is similar to incremental redundancy with the difference that it does not impose any overhead on the system. The principal idea here is to dynamically change the usage of the available transmission resources to allow adaptive adjustment of the effective coding rate of payloads according to the channel condition. The simulation results indicate a gain of 1–2 dB at low SNR regime that translates into better coverage and robustness of the system. The main feature of the proposed scheme is that the gain is achieved without any increase in the system overhead.
{"title":"Adaptive RCPC-based cooperative coding for coordinated multipoint transmission","authors":"A. Haghighat, A. Helmy","doi":"10.1109/RWS.2011.5725476","DOIUrl":"https://doi.org/10.1109/RWS.2011.5725476","url":null,"abstract":"Cooperative Communication enables a system to achieve a significant gain in coverage and capacity. In coded cooperation, channel coding is embedded in the cooperation strategy, and the optimal level of the cooperation between the nodes needs to be determined according to the channel conditions. Using RCPC codes, we propose an adaptive approach that relies on efficient reallocation of system resources. The implemented scheme is similar to incremental redundancy with the difference that it does not impose any overhead on the system. The principal idea here is to dynamically change the usage of the available transmission resources to allow adaptive adjustment of the effective coding rate of payloads according to the channel condition. The simulation results indicate a gain of 1–2 dB at low SNR regime that translates into better coverage and robustness of the system. The main feature of the proposed scheme is that the gain is achieved without any increase in the system overhead.","PeriodicalId":250672,"journal":{"name":"2011 IEEE Radio and Wireless Symposium","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125615039","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 : 2011-03-07DOI: 10.1109/RWS.2011.5725499
Y. Hong, R. Henderson
This paper presents results of a spiral defected ground structure (SDGS) study in grounded coplanar waveguide (GCPW) technology. A SDGS is implemented on the top and bottom ground planes of a GCPW transmission line resulting in stronger attenuation poles. By varying the SDGS degrees of freedom, resonators have been designed for a tuning range from 3.7 to 7.2 GHz. 5 GHz resonators have been fabricated and show good agreement with simulated results.
{"title":"Spiral defected ground structures in grounded coplanar waveguide","authors":"Y. Hong, R. Henderson","doi":"10.1109/RWS.2011.5725499","DOIUrl":"https://doi.org/10.1109/RWS.2011.5725499","url":null,"abstract":"This paper presents results of a spiral defected ground structure (SDGS) study in grounded coplanar waveguide (GCPW) technology. A SDGS is implemented on the top and bottom ground planes of a GCPW transmission line resulting in stronger attenuation poles. By varying the SDGS degrees of freedom, resonators have been designed for a tuning range from 3.7 to 7.2 GHz. 5 GHz resonators have been fabricated and show good agreement with simulated results.","PeriodicalId":250672,"journal":{"name":"2011 IEEE Radio and Wireless Symposium","volume":"130 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121453736","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 : 2011-03-07DOI: 10.1109/RWS.2011.5725466
Oyvind Aardal, S. Hamran, T. Berger, Jan Hammerstad, T. Lande
Cardiopulmonary motion can be detected from a distance using radar. Which frequencies that are best suited for detecting heartbeats or respiration is connected to the radar cross section (RCS) of the physiological motion. In this paper, we investigate the RCS of human heartbeats and respiration in the frequency range 500MHz to 3GHz through calibrated radar recordings of two persons.
{"title":"Radar cross section of the human heartbeat and respiration in the 500MHz to 3GHz band","authors":"Oyvind Aardal, S. Hamran, T. Berger, Jan Hammerstad, T. Lande","doi":"10.1109/RWS.2011.5725466","DOIUrl":"https://doi.org/10.1109/RWS.2011.5725466","url":null,"abstract":"Cardiopulmonary motion can be detected from a distance using radar. Which frequencies that are best suited for detecting heartbeats or respiration is connected to the radar cross section (RCS) of the physiological motion. In this paper, we investigate the RCS of human heartbeats and respiration in the frequency range 500MHz to 3GHz through calibrated radar recordings of two persons.","PeriodicalId":250672,"journal":{"name":"2011 IEEE Radio and Wireless Symposium","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132486826","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 : 2011-03-07DOI: 10.1109/RWS.2011.5725488
E. Kanterakis, W. Su
In this work we present various blind algorithms for estimating signal parameters of unknown OFDM signal waveforms in frequency-selective Rayleigh channels. These algorithms are meant to alleviate some of the challenges facing unauthorized receivers and cognitive radios where many received signal parameters are unknown. Previously known single-symbol algorithms for Maximum Likelihood (ML) Timing and Carrier Frequency Offset (CFO) estimation have been extended to multi-symbol type. Fine parameter estimation using transform domain methods are also presented. The application of these algorithms to field collected OFDM waveforms is also presented. New blind OFDM channel estimation algorithms are presented.
{"title":"Blind OFDM parameter estimation techniques in frequency-selective rayleigh channels","authors":"E. Kanterakis, W. Su","doi":"10.1109/RWS.2011.5725488","DOIUrl":"https://doi.org/10.1109/RWS.2011.5725488","url":null,"abstract":"In this work we present various blind algorithms for estimating signal parameters of unknown OFDM signal waveforms in frequency-selective Rayleigh channels. These algorithms are meant to alleviate some of the challenges facing unauthorized receivers and cognitive radios where many received signal parameters are unknown. Previously known single-symbol algorithms for Maximum Likelihood (ML) Timing and Carrier Frequency Offset (CFO) estimation have been extended to multi-symbol type. Fine parameter estimation using transform domain methods are also presented. The application of these algorithms to field collected OFDM waveforms is also presented. New blind OFDM channel estimation algorithms are presented.","PeriodicalId":250672,"journal":{"name":"2011 IEEE Radio and Wireless Symposium","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133246365","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 : 2011-03-07DOI: 10.1109/RWS.2011.5725501
D. B. da Costa, U. Dias
Spectrum sharing concepts have been widely employed in the design of practical systems with the aim to improve the utilization efficiency of the radio spectrum. Motivated by this, a comprehensive capacity study of spectrum sharing systems undergoing α-ε fading is performed in this paper. More specifically, assuming identical fading parameters, a closed-form expression for the delay-limited capacity is derived. In addition, based on the power allocation related to the outage capacity, a closed-form expression for the corresponding minimum outage probability is attained. Guidelines on how the ergodic capacity can be evaluated are also presented. Numerical plots are shown in order to investigate the effect of the fading parameters in the system capacity.
{"title":"On the capacity of spectrum sharing systems in generalized fading scenarios","authors":"D. B. da Costa, U. Dias","doi":"10.1109/RWS.2011.5725501","DOIUrl":"https://doi.org/10.1109/RWS.2011.5725501","url":null,"abstract":"Spectrum sharing concepts have been widely employed in the design of practical systems with the aim to improve the utilization efficiency of the radio spectrum. Motivated by this, a comprehensive capacity study of spectrum sharing systems undergoing α-ε fading is performed in this paper. More specifically, assuming identical fading parameters, a closed-form expression for the delay-limited capacity is derived. In addition, based on the power allocation related to the outage capacity, a closed-form expression for the corresponding minimum outage probability is attained. Guidelines on how the ergodic capacity can be evaluated are also presented. Numerical plots are shown in order to investigate the effect of the fading parameters in the system capacity.","PeriodicalId":250672,"journal":{"name":"2011 IEEE Radio and Wireless Symposium","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132851498","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 : 2011-03-07DOI: 10.1109/RWS.2011.5725432
Xin Wang, S. Fan, B. Qin, Lin Lin, Q. Fang, H Zhao, He Tang, Jianlin Liu, Zitao Shi, Albert Wang, Liwu Yang, Yuhua Cheng
This paper presents design of an all-digital fully-integrated 5th-order Gaussian pulse generator (PG) for full band (3.1GHz–10.6GHz) impulse radio ultra wideband (IR-UWB) transceiver SoC. The design is implemented in a foundry 0.18µm CMOS process. New FCC effective isotropic radiated power (EIRP) aware design technique is used to optimize the PG. Measurement shows peak pulse amplitude of 533mV at 100MHz pulse repeating frequency (PRF) and pulse width of 418pS. 5kV ESD protection is integrated. This 5th Gaussian PG consumes the lowest reported power of 0.05pJ/p-mV and support data rate to 2.4Gbps.
{"title":"A 0.05pJ/p-mV 5th-derivative pulse generator for full-band IR-UWB transceiver in 0.18µm CMOS","authors":"Xin Wang, S. Fan, B. Qin, Lin Lin, Q. Fang, H Zhao, He Tang, Jianlin Liu, Zitao Shi, Albert Wang, Liwu Yang, Yuhua Cheng","doi":"10.1109/RWS.2011.5725432","DOIUrl":"https://doi.org/10.1109/RWS.2011.5725432","url":null,"abstract":"This paper presents design of an all-digital fully-integrated 5th-order Gaussian pulse generator (PG) for full band (3.1GHz–10.6GHz) impulse radio ultra wideband (IR-UWB) transceiver SoC. The design is implemented in a foundry 0.18µm CMOS process. New FCC effective isotropic radiated power (EIRP) aware design technique is used to optimize the PG. Measurement shows peak pulse amplitude of 533mV at 100MHz pulse repeating frequency (PRF) and pulse width of 418pS. 5kV ESD protection is integrated. This 5th Gaussian PG consumes the lowest reported power of 0.05pJ/p-mV and support data rate to 2.4Gbps.","PeriodicalId":250672,"journal":{"name":"2011 IEEE Radio and Wireless Symposium","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134551452","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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