Pub Date : 2013-04-14DOI: 10.1109/IEEE-IWS.2013.6616814
A. García-Lampérez, S. Llorente-Romano, M. Salazar-Palma
Compact multiplexers are a class of multiport networks entirely formed by coupled resonators, with no additional elements, as junction structures or transmission line lengths. The synthesis of their coupling matrices require the formulation of scattering coefficients as rational functions that verify the realizability conditions. A solution is to approximate the reflection coefficients as the ones of isolated filters, and then to reconstruct the transmission coefficients. This approach is quite robust when the pass bands are clearly separated, but additional care must be taken when they are contiguous. In particular, phase offsets should be applied to the isolated filters responses. The effect of these phase shifts can be compensated after the coupling matrix synthesis.
{"title":"Formulation of realizable scattering matrices for multiplexers with contiguous bands","authors":"A. García-Lampérez, S. Llorente-Romano, M. Salazar-Palma","doi":"10.1109/IEEE-IWS.2013.6616814","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616814","url":null,"abstract":"Compact multiplexers are a class of multiport networks entirely formed by coupled resonators, with no additional elements, as junction structures or transmission line lengths. The synthesis of their coupling matrices require the formulation of scattering coefficients as rational functions that verify the realizability conditions. A solution is to approximate the reflection coefficients as the ones of isolated filters, and then to reconstruct the transmission coefficients. This approach is quite robust when the pass bands are clearly separated, but additional care must be taken when they are contiguous. In particular, phase offsets should be applied to the isolated filters responses. The effect of these phase shifts can be compensated after the coupling matrix synthesis.","PeriodicalId":344851,"journal":{"name":"2013 IEEE International Wireless Symposium (IWS)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132630067","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 : 2013-04-14DOI: 10.1109/IEEE-IWS.2013.6616850
Bumman Kim
Summary form only given. The handset PAs for advanced system, such as 4G and beyond, should handle signals with high PAPR. For amplification of the signals, efficiency of the PAs is degraded significantly due to the operation at a low power region. For the system application point, the PAs are required to have a multimode and multiband capability, also. These stringent requirements ask advanced design architectures of the PAs. These architectures are based on a highly efficient amplifier and try to maintain the high efficiency at a low power level. The representative architectures are ET technique, Doherty amplifier, class-S amplifier, LINC and some digital PAs. ET is the most popular architecture for the handset application since the ET PA is very flexible, suitable to the multimode and multiband operation, together with high efficiency. This technique can be applied easily to a low-high mode PA, also. One variation of the technique is an average power tracking (APT) amplifier, controlling VDC according to the average power level at a slow speed using a buck DC-DC converter. This PA is on the market, now. Doherty can provide a high efficiency for the application and there is a significant progress for the broad banding but the bandwidth is still limited. Recently, the performance of the LINC PA is improved significantly by increasing the power combining efficiency. The distortion is cancelled using DPD technique. The progress in LINC is mainly focused on the infrastructure application but it can be employed for handset PA also. As transistors are scaled down with higher speed, the digitally configured circuit can be applied for the RF signal amplification. The digital circuit is very flexible and can be used for multimode/multiband application but the performance is not up to the expectation, yet. For the digital amplification, the I-Q modulated signal is, normally, up-converted to a polar signal. The amplitude information is digitized at the base band speed or the RF frequency and is applied to the digital circuit. The digital bit signal can be amplified by the thermo coded cells, forming a digital amplifier. The digitizing can be done using sigma-delta modulator and the digitized bit can be applied to a PA, either as an input or as a bias voltage. The resulting amplifier is a class-S PA. The I-Q modulated signal can be directly up-converted while maintaining the digital bits using sampling technique and is applied to the thermo code cells. These digitally configured PAs are actively studied now and will progress continuous. These various advanced architectures for the next generation PA for handset application will be introduced in this talk.
{"title":"Advanced linear PA architectures for handset applications","authors":"Bumman Kim","doi":"10.1109/IEEE-IWS.2013.6616850","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616850","url":null,"abstract":"Summary form only given. The handset PAs for advanced system, such as 4G and beyond, should handle signals with high PAPR. For amplification of the signals, efficiency of the PAs is degraded significantly due to the operation at a low power region. For the system application point, the PAs are required to have a multimode and multiband capability, also. These stringent requirements ask advanced design architectures of the PAs. These architectures are based on a highly efficient amplifier and try to maintain the high efficiency at a low power level. The representative architectures are ET technique, Doherty amplifier, class-S amplifier, LINC and some digital PAs. ET is the most popular architecture for the handset application since the ET PA is very flexible, suitable to the multimode and multiband operation, together with high efficiency. This technique can be applied easily to a low-high mode PA, also. One variation of the technique is an average power tracking (APT) amplifier, controlling VDC according to the average power level at a slow speed using a buck DC-DC converter. This PA is on the market, now. Doherty can provide a high efficiency for the application and there is a significant progress for the broad banding but the bandwidth is still limited. Recently, the performance of the LINC PA is improved significantly by increasing the power combining efficiency. The distortion is cancelled using DPD technique. The progress in LINC is mainly focused on the infrastructure application but it can be employed for handset PA also. As transistors are scaled down with higher speed, the digitally configured circuit can be applied for the RF signal amplification. The digital circuit is very flexible and can be used for multimode/multiband application but the performance is not up to the expectation, yet. For the digital amplification, the I-Q modulated signal is, normally, up-converted to a polar signal. The amplitude information is digitized at the base band speed or the RF frequency and is applied to the digital circuit. The digital bit signal can be amplified by the thermo coded cells, forming a digital amplifier. The digitizing can be done using sigma-delta modulator and the digitized bit can be applied to a PA, either as an input or as a bias voltage. The resulting amplifier is a class-S PA. The I-Q modulated signal can be directly up-converted while maintaining the digital bits using sampling technique and is applied to the thermo code cells. These digitally configured PAs are actively studied now and will progress continuous. These various advanced architectures for the next generation PA for handset application will be introduced in this talk.","PeriodicalId":344851,"journal":{"name":"2013 IEEE International Wireless Symposium (IWS)","volume":"2 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133258989","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 : 2013-04-14DOI: 10.1109/IEEE-IWS.2013.6616801
A. Anbaran, A. Mohammadi, A. Abdipour
In this paper, we investigate electronically steerable parasitic array radiator (ESPAR) smart antenna in a highway scenario, where roadside access points (APs) are installed on a highway to provide intelligent transportation System (ITS) services. We Consider vehicle-to-roadside (V2R) communication for a vehicle that aims to send data to the AP (uplink). A seven element ESPAR system as a beam former smart antenna in AP is used to eliminate the interference signals. The simulation results indicate that ESPAR system can improve the average capacity of the link more than 2 bps/Hz.
{"title":"Capacity enhancement in vehicle to roadside networks using ESPAR technique","authors":"A. Anbaran, A. Mohammadi, A. Abdipour","doi":"10.1109/IEEE-IWS.2013.6616801","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616801","url":null,"abstract":"In this paper, we investigate electronically steerable parasitic array radiator (ESPAR) smart antenna in a highway scenario, where roadside access points (APs) are installed on a highway to provide intelligent transportation System (ITS) services. We Consider vehicle-to-roadside (V2R) communication for a vehicle that aims to send data to the AP (uplink). A seven element ESPAR system as a beam former smart antenna in AP is used to eliminate the interference signals. The simulation results indicate that ESPAR system can improve the average capacity of the link more than 2 bps/Hz.","PeriodicalId":344851,"journal":{"name":"2013 IEEE International Wireless Symposium (IWS)","volume":"75 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134011095","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 : 2013-04-14DOI: 10.1109/IEEE-IWS.2013.6616787
S. A. Sis, V. Lee, Seungku Lee, A. Mortazawi
This paper presents bulk acoustic wave resonators using the ferroelectric materials barium titanate and barium strontium titanate. The electric field induced piezoelectric effect in these materials is utilized in the design of various types of intrinsically switchable bulk acoustic wave resonators. Both thickness mode and lateral mode resonator results, which have been demonstrated recently, are summarized in this paper. Significantly improved quality factors by means of forming a ferroelectric-on-silicon structure are also demonstrated.
{"title":"Intrinsically switchable thin film ferroelectric resonators utilizing electric field induced piezoelectric effect","authors":"S. A. Sis, V. Lee, Seungku Lee, A. Mortazawi","doi":"10.1109/IEEE-IWS.2013.6616787","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616787","url":null,"abstract":"This paper presents bulk acoustic wave resonators using the ferroelectric materials barium titanate and barium strontium titanate. The electric field induced piezoelectric effect in these materials is utilized in the design of various types of intrinsically switchable bulk acoustic wave resonators. Both thickness mode and lateral mode resonator results, which have been demonstrated recently, are summarized in this paper. Significantly improved quality factors by means of forming a ferroelectric-on-silicon structure are also demonstrated.","PeriodicalId":344851,"journal":{"name":"2013 IEEE International Wireless Symposium (IWS)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131883459","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 : 2013-04-14DOI: 10.1109/IEEE-IWS.2013.6616772
N. Goncharuk
Microwave diode on AlGaAs/GaAs single barrier nanostructure with electron tunnel injection through AlGaAs potential barrier and electron drift in GaAs transit layer is investigated in the framework of small-signal theory taking into account diode parasitic resistance. We consider both transit and injection time of electron since they are comparable and determine operating frequency of the diode. Calculated values of maximal negative conductance are near 200mS and 30mS for the diodes with operating frequencies 270GHz to 880GHz, respectively.
{"title":"Submillimeter diode on single barrier nanostructure","authors":"N. Goncharuk","doi":"10.1109/IEEE-IWS.2013.6616772","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616772","url":null,"abstract":"Microwave diode on AlGaAs/GaAs single barrier nanostructure with electron tunnel injection through AlGaAs potential barrier and electron drift in GaAs transit layer is investigated in the framework of small-signal theory taking into account diode parasitic resistance. We consider both transit and injection time of electron since they are comparable and determine operating frequency of the diode. Calculated values of maximal negative conductance are near 200mS and 30mS for the diodes with operating frequencies 270GHz to 880GHz, respectively.","PeriodicalId":344851,"journal":{"name":"2013 IEEE International Wireless Symposium (IWS)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133047900","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 : 2013-04-14DOI: 10.1109/IEEE-IWS.2013.6616764
Yuehang Xu, Oupeng Li, R. Xu
Two kinds of doubly clamped beam graphene resonant channel transistors (RCTs) with local gate configurations, fabricated by direct exfoliation and transfer are presented in this paper. The RCTs are actuated and detected directly by using a vector network analyzer. And the measurement results show that the exfoliation RCT and transfer RCT have resonant frequencies of ~34MHz at 77K and ~88MHz at 300K, respectively. The operation principle of radio frequency (RF) RCT is detailed in this paper. And a compact electrical equivalent circuit model has been given out based on the analysis of electromechanical model of doubly clamped beam and field effect transistor theory. The results show that excellent agreements have been achieved between the experimental results and the simulation results. With the proposed compact model, the RCTs can be useful for developing high sensitivity sensor, or in the perspective of high quality RF filters by using graphene nano-electromechanical systems(NEMS).
{"title":"Graphene resonant channel transistor","authors":"Yuehang Xu, Oupeng Li, R. Xu","doi":"10.1109/IEEE-IWS.2013.6616764","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616764","url":null,"abstract":"Two kinds of doubly clamped beam graphene resonant channel transistors (RCTs) with local gate configurations, fabricated by direct exfoliation and transfer are presented in this paper. The RCTs are actuated and detected directly by using a vector network analyzer. And the measurement results show that the exfoliation RCT and transfer RCT have resonant frequencies of ~34MHz at 77K and ~88MHz at 300K, respectively. The operation principle of radio frequency (RF) RCT is detailed in this paper. And a compact electrical equivalent circuit model has been given out based on the analysis of electromechanical model of doubly clamped beam and field effect transistor theory. The results show that excellent agreements have been achieved between the experimental results and the simulation results. With the proposed compact model, the RCTs can be useful for developing high sensitivity sensor, or in the perspective of high quality RF filters by using graphene nano-electromechanical systems(NEMS).","PeriodicalId":344851,"journal":{"name":"2013 IEEE International Wireless Symposium (IWS)","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115745606","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 : 2013-04-14DOI: 10.1109/IEEE-IWS.2013.6616782
V. Lee, S. A. Sis, Seungku Lee, A. Mortazawi
Single-standard wireless transceivers are of limited use as multi-mode devices become ubiquitous. Adaptive and reconfigurable RF circuits are necessary to decrease size, cost, and power consumption as well as increase reliability and robustness of wireless devices. In this paper, the design, fabrication, and performance of acoustically coupled and electrically coupled filters based on the ferroelectric barium strontium titanate are discussed. In their off state, the input and output ports are isolated from one another. When switched on with the application of a dc bias voltage, a bandpass filter response is obtained.
{"title":"Intrinsically switchable ferroelectric bulk acoustic wave filters based on barium strontium titanate thin films","authors":"V. Lee, S. A. Sis, Seungku Lee, A. Mortazawi","doi":"10.1109/IEEE-IWS.2013.6616782","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616782","url":null,"abstract":"Single-standard wireless transceivers are of limited use as multi-mode devices become ubiquitous. Adaptive and reconfigurable RF circuits are necessary to decrease size, cost, and power consumption as well as increase reliability and robustness of wireless devices. In this paper, the design, fabrication, and performance of acoustically coupled and electrically coupled filters based on the ferroelectric barium strontium titanate are discussed. In their off state, the input and output ports are isolated from one another. When switched on with the application of a dc bias voltage, a bandpass filter response is obtained.","PeriodicalId":344851,"journal":{"name":"2013 IEEE International Wireless Symposium (IWS)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134333252","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 : 2013-04-14DOI: 10.1109/IEEE-IWS.2013.6616796
J. Moghaddasi, K. Wu
A multifunctional transceiver for integrated radar sensing and radio communication (or simply termed RadCom) systems is developed in the time domain. It is a robust alternative of the previous architecture for a smart system that operates jointly as radar or radio in consecutive time slots. Following a system design approach, a low-frequency prototype of the proposed transceiver is realized and its performance is evaluated. Within the radar mode, the added ability of target detection as well as improved range resolution against the previously demonstrated version makes the system suitable for driving assistance applications. Within the radio mode, it has proved a great capability of communication at a data rate of 25Mbps.
{"title":"Improved joint radar-radio (RadCom) transceiver for future intelligent transportation platforms and highly mobile high-speed communication systems","authors":"J. Moghaddasi, K. Wu","doi":"10.1109/IEEE-IWS.2013.6616796","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616796","url":null,"abstract":"A multifunctional transceiver for integrated radar sensing and radio communication (or simply termed RadCom) systems is developed in the time domain. It is a robust alternative of the previous architecture for a smart system that operates jointly as radar or radio in consecutive time slots. Following a system design approach, a low-frequency prototype of the proposed transceiver is realized and its performance is evaluated. Within the radar mode, the added ability of target detection as well as improved range resolution against the previously demonstrated version makes the system suitable for driving assistance applications. Within the radio mode, it has proved a great capability of communication at a data rate of 25Mbps.","PeriodicalId":344851,"journal":{"name":"2013 IEEE International Wireless Symposium (IWS)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131682343","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 : 2013-04-14DOI: 10.1109/IEEE-IWS.2013.6616706
P. He, Lian Zhao, Jianhua Lu
This paper considers a cognitive radio (CR) network, in which the unlicensed (secondary) users (SUs) are allowed to concurrently access the spectrum allocated to the licensed (primary) users provided that their interference to the primary users (PUs) satisfies certain constraints. Under ensuring the quality of service (QoS) of the PUs, the precious spectrum resource can be utilized by maximizing the sum-rate and optimizing power allocation of the SUs. On the other hand, the multiple-antenna mobile user case needs further investigating for the problem mentioned above. Thus, we simply term this setting as multiple input multiple output multiple access channels (MIMO-MAC) in the CR Networks. To effectively and efficiently optimize the power allocation of the SUs, a tight pair of upper and lower bounds, as an interval, of the optimal Lagrange multiplier is proposed. Furthermore, a novel water-filling is proposed for the inner loop computation of the proposed problem. It is shown that the new water-filling can obtain the exact solution with a few finite computations. Therefore, not only is convergence of the proposed algorithm guaranteed, but efficient computation is also provided by the proposed algorithm.
本文研究了一种认知无线电(CR)网络，在该网络中，只要未授权的(辅助)用户对主用户的干扰满足一定的约束条件，就允许未授权的(辅助)用户(su)并发地访问分配给授权的(主)用户的频谱。在保证单板的QoS (quality of service)的前提下，通过最大化单板的求和速率和优化功率分配，可以充分利用宝贵的频谱资源。另一方面，对于上述问题，多天线移动用户案例需要进一步研究。因此，我们简单地将这种设置称为CR网络中的多输入多输出多访问通道(MIMO-MAC)。为了有效地优化单元的功率分配，提出了最优拉格朗日乘子的紧对上界和下界作为区间。在此基础上，提出了一种新的充水方法，用于该问题的内环计算。结果表明，这种新的充水方法只需少量的有限次计算即可得到精确解。因此，该算法不仅保证了算法的收敛性，而且提供了高效的计算能力。
{"title":"Efficient optimal power allocation for MIMO MAC in cognitive radio networks","authors":"P. He, Lian Zhao, Jianhua Lu","doi":"10.1109/IEEE-IWS.2013.6616706","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616706","url":null,"abstract":"This paper considers a cognitive radio (CR) network, in which the unlicensed (secondary) users (SUs) are allowed to concurrently access the spectrum allocated to the licensed (primary) users provided that their interference to the primary users (PUs) satisfies certain constraints. Under ensuring the quality of service (QoS) of the PUs, the precious spectrum resource can be utilized by maximizing the sum-rate and optimizing power allocation of the SUs. On the other hand, the multiple-antenna mobile user case needs further investigating for the problem mentioned above. Thus, we simply term this setting as multiple input multiple output multiple access channels (MIMO-MAC) in the CR Networks. To effectively and efficiently optimize the power allocation of the SUs, a tight pair of upper and lower bounds, as an interval, of the optimal Lagrange multiplier is proposed. Furthermore, a novel water-filling is proposed for the inner loop computation of the proposed problem. It is shown that the new water-filling can obtain the exact solution with a few finite computations. Therefore, not only is convergence of the proposed algorithm guaranteed, but efficient computation is also provided by the proposed algorithm.","PeriodicalId":344851,"journal":{"name":"2013 IEEE International Wireless Symposium (IWS)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131657806","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 : 2013-04-14DOI: 10.1109/IEEE-IWS.2013.6616815
C. Heng, Yuan Gao, Mehran M. Izad, Shengxi Diao, San-Jeow Cheng, Yuanjin Zheng, M. Je
In this paper, we examine techniques to achieve both spectrum and energy efficient transmitters, targeting for high data rate biomedical applications. These applications benefit from asymmetric data link, where energy efficient high data rate transmitter and low data rate receiver are usually integrated. Injection locking LC oscillator and ring oscillator are employed here to achieve efficient PSK modulation. QPSK/O-QPSK/8PSK modulation with EVM of 6.4%/4.5%/3.8% have been demonstrated at data rate of 10Mbps~90Mbps with the lowest reported energy efficiency of 118pJ/bit and 17pJ/bit. Due to the architectural simplification, only active area of 0.28mm2 and 0.038mm2 are required for the transmitters.
{"title":"Energy efficient transmitters for high data rate biomedical applications","authors":"C. Heng, Yuan Gao, Mehran M. Izad, Shengxi Diao, San-Jeow Cheng, Yuanjin Zheng, M. Je","doi":"10.1109/IEEE-IWS.2013.6616815","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616815","url":null,"abstract":"In this paper, we examine techniques to achieve both spectrum and energy efficient transmitters, targeting for high data rate biomedical applications. These applications benefit from asymmetric data link, where energy efficient high data rate transmitter and low data rate receiver are usually integrated. Injection locking LC oscillator and ring oscillator are employed here to achieve efficient PSK modulation. QPSK/O-QPSK/8PSK modulation with EVM of 6.4%/4.5%/3.8% have been demonstrated at data rate of 10Mbps~90Mbps with the lowest reported energy efficiency of 118pJ/bit and 17pJ/bit. Due to the architectural simplification, only active area of 0.28mm2 and 0.038mm2 are required for the transmitters.","PeriodicalId":344851,"journal":{"name":"2013 IEEE International Wireless Symposium (IWS)","volume":"182 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131892127","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：