Pub Date : 2011-03-07DOI: 10.1109/RWS.2011.5725498
Nam H. Nguyen, T. Sexton
L User Equipments (mobile stations) transmit signals with sparsity S and their signals are compressively sensed to M samples by Z remote samplers (a distributed antenna arrangement) and the uplink channel is estimated by a central processor (the “central brain”). For a given system signal to noise ratio, retained samples M and sparsity S, we approximate the loss in sum mutual information due to imperfect knowledge of the channel. The approximation is premised on a lower bound of the mutual information which accounts for the power in the channel estimation error. Also, throughput results are given for adaptively adjusting the sparsity of multiple users' transmit signals based on channel fading.
{"title":"Can compressed sensing be efficient in communication with sparse data?","authors":"Nam H. Nguyen, T. Sexton","doi":"10.1109/RWS.2011.5725498","DOIUrl":"https://doi.org/10.1109/RWS.2011.5725498","url":null,"abstract":"L User Equipments (mobile stations) transmit signals with sparsity S and their signals are compressively sensed to M samples by Z remote samplers (a distributed antenna arrangement) and the uplink channel is estimated by a central processor (the “central brain”). For a given system signal to noise ratio, retained samples M and sparsity S, we approximate the loss in sum mutual information due to imperfect knowledge of the channel. The approximation is premised on a lower bound of the mutual information which accounts for the power in the channel estimation error. Also, throughput results are given for adaptively adjusting the sparsity of multiple users' transmit signals based on channel fading.","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":"116932894","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.2011.5725442
Shabbir Ahmed, M. Faulkner
Wireless communication service providers are having to co-locate base stations (BTS) on common sites, since little space is available to build new ones. BTS receivers have to receive weak desired signals at the presence of strong transmit signals from co-located transmitters; resulting in interference and desensitization. This leads to higher dynamic range requirements for BTS receivers. The paper describes an adaptive cancellation system for mitigating these large transmit interferers at a BTS receiver; hence, increasing the receiver's dynamic range. The paper further derives theoretical expressions for the IP3 and noise factor, which formulates the upper and lower end of the dynamic range of the system. Practical measurements demonstrate a reduction in interference and intermodulation. The prototype achieves a cancellation of 53dB.
{"title":"An adaptive cancellation system for a colocated receiver and its dynamic range","authors":"Shabbir Ahmed, M. Faulkner","doi":"10.1109/RWS.2011.5725442","DOIUrl":"https://doi.org/10.1109/RWS.2011.5725442","url":null,"abstract":"Wireless communication service providers are having to co-locate base stations (BTS) on common sites, since little space is available to build new ones. BTS receivers have to receive weak desired signals at the presence of strong transmit signals from co-located transmitters; resulting in interference and desensitization. This leads to higher dynamic range requirements for BTS receivers. The paper describes an adaptive cancellation system for mitigating these large transmit interferers at a BTS receiver; hence, increasing the receiver's dynamic range. The paper further derives theoretical expressions for the IP3 and noise factor, which formulates the upper and lower end of the dynamic range of the system. Practical measurements demonstrate a reduction in interference and intermodulation. The prototype achieves a cancellation of 53dB.","PeriodicalId":250672,"journal":{"name":"2011 IEEE Radio and Wireless Symposium","volume":"148 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":"117034057","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.2011.5725449
M. Cha, D. Oh, Induck Choi, I. Kwon
For the IEEE 802.11a/b/g wireless local area network (WLAN) applications, a receiver baseband analog (BBA) chain is designed. To improve performances of linearity and noise, an optimum allocation of gain and filter order of each block is performed. The fully integrated BBA chain is fabricated in 0.13µm 1-ploy 6-metal CMOS technology. The 3-dB bandwidth is tunable from 7.1MHz to 12.2MHz with digitally controlled switched capacitor array. An input-referred noise voltage (IRN) of 32.2 nV/√Hz at a gain of 60.8 dB and an input-referred third-order intercept point (IIP3) of 22.9 dBm at a gain of 0 dB are obtained. The total current consumption of the receiver BBA chain of 10 mA is obtained and the chip occupies 1.32mm2. Finally, the excellent SFDR performance of 63.9 dB is achieved.
{"title":"A 64-dB spurious free dynamic range CMOS baseband analog chain for IEEE 802.11a/b/g WLAN","authors":"M. Cha, D. Oh, Induck Choi, I. Kwon","doi":"10.1109/RWS.2011.5725449","DOIUrl":"https://doi.org/10.1109/RWS.2011.5725449","url":null,"abstract":"For the IEEE 802.11a/b/g wireless local area network (WLAN) applications, a receiver baseband analog (BBA) chain is designed. To improve performances of linearity and noise, an optimum allocation of gain and filter order of each block is performed. The fully integrated BBA chain is fabricated in 0.13µm 1-ploy 6-metal CMOS technology. The 3-dB bandwidth is tunable from 7.1MHz to 12.2MHz with digitally controlled switched capacitor array. An input-referred noise voltage (IRN) of 32.2 nV/√Hz at a gain of 60.8 dB and an input-referred third-order intercept point (IIP3) of 22.9 dBm at a gain of 0 dB are obtained. The total current consumption of the receiver BBA chain of 10 mA is obtained and the chip occupies 1.32mm2. Finally, the excellent SFDR performance of 63.9 dB is achieved.","PeriodicalId":250672,"journal":{"name":"2011 IEEE Radio and Wireless Symposium","volume":"184 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":"116353900","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.2011.5725433
Masaaki Yamamoto, T. Yamazoe
A null-zone control method—which converts a null zone into a readable zone using only the standard antennas of a radio-frequency identification (RFID) reader—was developed. Outdoor evaluation of the method implemented in a RFID tag-reader system demonstrates the validity of the method; namely, it converts the null zone into a readable zone and attains high RFID-tag readability in the near field of the reader antenna.
{"title":"A null-zone control method for RFID systems","authors":"Masaaki Yamamoto, T. Yamazoe","doi":"10.1109/RWS.2011.5725433","DOIUrl":"https://doi.org/10.1109/RWS.2011.5725433","url":null,"abstract":"A null-zone control method—which converts a null zone into a readable zone using only the standard antennas of a radio-frequency identification (RFID) reader—was developed. Outdoor evaluation of the method implemented in a RFID tag-reader system demonstrates the validity of the method; namely, it converts the null zone into a readable zone and attains high RFID-tag readability in the near field of the reader antenna.","PeriodicalId":250672,"journal":{"name":"2011 IEEE Radio and Wireless Symposium","volume":"30 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":"128380868","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.2011.5725438
T. Ishikawa, Shinji Murai, H. Nakamura, S. Hanaoka, M. Yano
In this paper, we discuss the functionality of mobile systems in a new generation network. Our goal is to provide mission-critical services using the mobile systems in the fields such as energy, disaster prevention, and medical care. It is necessary to guarantee both reliability and quality of communication for these services. We show that the future mobile systems should have three functions for cooperating with virtualized backbone networks and applications. We show the system architecture for achieving the functions, and preliminary evaluation on a testbed environment.
{"title":"Proposal of new generation mobile system cooperating with virtualized network","authors":"T. Ishikawa, Shinji Murai, H. Nakamura, S. Hanaoka, M. Yano","doi":"10.1109/RWS.2011.5725438","DOIUrl":"https://doi.org/10.1109/RWS.2011.5725438","url":null,"abstract":"In this paper, we discuss the functionality of mobile systems in a new generation network. Our goal is to provide mission-critical services using the mobile systems in the fields such as energy, disaster prevention, and medical care. It is necessary to guarantee both reliability and quality of communication for these services. We show that the future mobile systems should have three functions for cooperating with virtualized backbone networks and applications. We show the system architecture for achieving the functions, and preliminary evaluation on a testbed environment.","PeriodicalId":250672,"journal":{"name":"2011 IEEE Radio and Wireless Symposium","volume":"6 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":"127454782","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.2011.5725437
T. Kitayabu, H. Ishikawa
Concurrent transmission and reception of RF signals in different frequency bands is required for transceivers in IMT-Advanced systems to support the spectrum aggregation technique. In this paper, we introduce a prototype of concurrent dual-band receiver that uses IF undersampling, and present some evaluation results. The prototype has two types of receiver architecture, one a single mixer-type receiver that has a common IF (intermediate frequency) stage where the RF signals are converted, and the other a quadrature mixer-type receiver that has a common complex IF stage. Evaluations show that both receivers function adequately as concurrent receivers and that the quadrature mixer-type receiver gives better waveform quality than the single mixer-type receiver.
{"title":"Implementation of concurrent dual-band receiver using IF undersampling","authors":"T. Kitayabu, H. Ishikawa","doi":"10.1109/RWS.2011.5725437","DOIUrl":"https://doi.org/10.1109/RWS.2011.5725437","url":null,"abstract":"Concurrent transmission and reception of RF signals in different frequency bands is required for transceivers in IMT-Advanced systems to support the spectrum aggregation technique. In this paper, we introduce a prototype of concurrent dual-band receiver that uses IF undersampling, and present some evaluation results. The prototype has two types of receiver architecture, one a single mixer-type receiver that has a common IF (intermediate frequency) stage where the RF signals are converted, and the other a quadrature mixer-type receiver that has a common complex IF stage. Evaluations show that both receivers function adequately as concurrent receivers and that the quadrature mixer-type receiver gives better waveform quality than the single mixer-type receiver.","PeriodicalId":250672,"journal":{"name":"2011 IEEE Radio and Wireless Symposium","volume":"105 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":"127221063","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.2011.5725507
M. Matalgah, Amer M. Magableh
In this paper, inspired by network coding theory we propose an efficient hybrid encryption-coding algorithm that requires using traditional encryption only for the first small amount of data. This amount of data, which we refer to as the first block, is determined by the traditional encryption algorithm to be applied on this first block. In our proposed algorithm, all the rest of the information will then be transmitted securely over the wireless channel, using network coding, without a need for using traditional encryption. Unlike the traditional and opportunistic encryption algorithms, the proposed algorithm achieves higher data rates and less avalanche error effect and at the same time it is as secure as traditional encryption algorithms. Assuming the additive white Gaussian noise (AWGN) channel model employing our proposed algorithm we analyze its performance in terms of throughput and security level. Numerical results of different case studies are provided.
{"title":"Simple encryption algorithm with improved performance in wireless communications","authors":"M. Matalgah, Amer M. Magableh","doi":"10.1109/RWS.2011.5725507","DOIUrl":"https://doi.org/10.1109/RWS.2011.5725507","url":null,"abstract":"In this paper, inspired by network coding theory we propose an efficient hybrid encryption-coding algorithm that requires using traditional encryption only for the first small amount of data. This amount of data, which we refer to as the first block, is determined by the traditional encryption algorithm to be applied on this first block. In our proposed algorithm, all the rest of the information will then be transmitted securely over the wireless channel, using network coding, without a need for using traditional encryption. Unlike the traditional and opportunistic encryption algorithms, the proposed algorithm achieves higher data rates and less avalanche error effect and at the same time it is as secure as traditional encryption algorithms. Assuming the additive white Gaussian noise (AWGN) channel model employing our proposed algorithm we analyze its performance in terms of throughput and security level. Numerical results of different case studies are provided.","PeriodicalId":250672,"journal":{"name":"2011 IEEE Radio and Wireless Symposium","volume":"45 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":"121421877","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.2011.5725415
Xia Li, P. Baltus, D. Milosevic, P. van Zeijl, A. V. van Roermund
This work presents an ultra low-power duty-cycled wake-up radio system for high-data-rate, short-range millimeter-wave WPAN applications. The asynchronous duty-cycled wake-up power management method is proposed and optimized to reduce the average power consumption. As the design example, a 60 GHz radio system is discussed, which consists of a 4-path phase-array transceiver, a duty-cycled wake-up receiver and the digital control circuits. Theoretical analyses of the optimum duty-cycle factor towards minimum average power are shown accordingly. Simulation results are given and a 230 µW average power consumption is achieved for the entire radio, which leads to about 4000-hour operation time for a 1.5-V 1000-mAh re-chargeable battery.
这项工作提出了一种超低功耗占空比唤醒无线电系统，用于高数据速率、短距离毫米波WPAN应用。提出并优化了异步占空比唤醒电源管理方法，以降低平均功耗。以60ghz无线通信系统为例，讨论了该系统由四路相控阵收发器、占空比唤醒接收机和数字控制电路组成。并对最小平均功率下的最优占空比进行了理论分析。给出了仿真结果，整个无线电的平均功耗为230 μ W，这导致1.5 v 1000 mah可充电电池的工作时间约为4000小时。
{"title":"A 60 GHz ultra low-power wake-up radio","authors":"Xia Li, P. Baltus, D. Milosevic, P. van Zeijl, A. V. van Roermund","doi":"10.1109/RWS.2011.5725415","DOIUrl":"https://doi.org/10.1109/RWS.2011.5725415","url":null,"abstract":"This work presents an ultra low-power duty-cycled wake-up radio system for high-data-rate, short-range millimeter-wave WPAN applications. The asynchronous duty-cycled wake-up power management method is proposed and optimized to reduce the average power consumption. As the design example, a 60 GHz radio system is discussed, which consists of a 4-path phase-array transceiver, a duty-cycled wake-up receiver and the digital control circuits. Theoretical analyses of the optimum duty-cycle factor towards minimum average power are shown accordingly. Simulation results are given and a 230 µW average power consumption is achieved for the entire radio, which leads to about 4000-hour operation time for a 1.5-V 1000-mAh re-chargeable battery.","PeriodicalId":250672,"journal":{"name":"2011 IEEE Radio and Wireless Symposium","volume":"104 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":"122534229","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.2011.5725462
Y. Okamoto, I. Matsunami, A. Kajiwara
In this paper, a vehicle detection scheme is suggested using Hough transformation where some moving vehicles are discriminated from significant clutter by using linear trajectory detection in the Hough space. In general, the received range profile for a wideband radar pulse includes many echoes from various obstacles such as guardrail. Observing the profiles with high PRF during a short duration, each echoes trajectory can be estimated employing Hough transform. For example, the trajectory is regarded as linear when the speed of echo is constant and the moving vehicles are spatially discriminated with clutter. The Doppler can also be estimated from the time-range coordinate. As a result, some significant clutters would be eliminated in the Hough space and the vehicles are expected to be detected and tracked with high range and Doppler resolution. The field measurement at 24GHz was conducted for moving vehicles and the usefulness is discussed for various scenarios.
{"title":"Moving vehicle discrimination using Hough transformation","authors":"Y. Okamoto, I. Matsunami, A. Kajiwara","doi":"10.1109/RWS.2011.5725462","DOIUrl":"https://doi.org/10.1109/RWS.2011.5725462","url":null,"abstract":"In this paper, a vehicle detection scheme is suggested using Hough transformation where some moving vehicles are discriminated from significant clutter by using linear trajectory detection in the Hough space. In general, the received range profile for a wideband radar pulse includes many echoes from various obstacles such as guardrail. Observing the profiles with high PRF during a short duration, each echoes trajectory can be estimated employing Hough transform. For example, the trajectory is regarded as linear when the speed of echo is constant and the moving vehicles are spatially discriminated with clutter. The Doppler can also be estimated from the time-range coordinate. As a result, some significant clutters would be eliminated in the Hough space and the vehicles are expected to be detected and tracked with high range and Doppler resolution. The field measurement at 24GHz was conducted for moving vehicles and the usefulness is discussed for various scenarios.","PeriodicalId":250672,"journal":{"name":"2011 IEEE Radio and Wireless Symposium","volume":"52 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":"127017243","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.2011.5725421
R. Yu, T. Yeo, Hwa-Seng Yap, Kwang-Hung Tan, Chuanjun Zheng, Choon-Tiong Law, Tao Yan, Boon-Seah Quek, Sravanthi Vullikanti, Changqing Xu, Zhiping Li, L. Yeo, Yujing Ting, M. Itoh, Y. Kose
A multi-band multi-standard RFID reader SoC is described in this paper. It can be software-reconfigured to support mostly used protocols in UHF, 2.45GHz and 13.56MHz frequency bands. The single-chip reader integrates a RF transceiver, a synthesizer, ADCs/DACs and a digital baseband modem. It achieves >0dBm RX P1dB and >4dBm TX power (without external PAs) for all bands and RX sensitivity down to −72dBm for UHF band in the presence of transmitter carrier leakage. Implemented in a 90nm CMOS process, the reader occupies 3.6×3.8mm2 and consumes less than 114mW from 1.2V/3.3V supply.
{"title":"A low-power UHF/13.56MHz/2.4GHz multi-standard RFID reader transceiver SoC in 90nm CMOS","authors":"R. Yu, T. Yeo, Hwa-Seng Yap, Kwang-Hung Tan, Chuanjun Zheng, Choon-Tiong Law, Tao Yan, Boon-Seah Quek, Sravanthi Vullikanti, Changqing Xu, Zhiping Li, L. Yeo, Yujing Ting, M. Itoh, Y. Kose","doi":"10.1109/RWS.2011.5725421","DOIUrl":"https://doi.org/10.1109/RWS.2011.5725421","url":null,"abstract":"A multi-band multi-standard RFID reader SoC is described in this paper. It can be software-reconfigured to support mostly used protocols in UHF, 2.45GHz and 13.56MHz frequency bands. The single-chip reader integrates a RF transceiver, a synthesizer, ADCs/DACs and a digital baseband modem. It achieves >0dBm RX P1dB and >4dBm TX power (without external PAs) for all bands and RX sensitivity down to −72dBm for UHF band in the presence of transmitter carrier leakage. Implemented in a 90nm CMOS process, the reader occupies 3.6×3.8mm2 and consumes less than 114mW from 1.2V/3.3V supply.","PeriodicalId":250672,"journal":{"name":"2011 IEEE Radio and Wireless Symposium","volume":"115 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":"131896316","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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