Pub Date : 2010-01-10DOI: 10.1109/RWS.2010.5434181
K. Yamashita, Takeshi Yamamoto, H. Seita, E. Shimane, S. Kawasaki
5.8 GHz band digital phase shifters to control a beam direction for an Active Integrated Phased Array Antenna (AIPAA) are designed. The 4-bit phase shifters with integrated GaAs FET SPDT switches are integrated with an LTCC substrate. We realized a low loss 4-bit LTCC phase shifter with the size of 10 mm × 13 mm × 0.55 mm. From the simulation results, the insertion loss of LTCC phase shifter without the switch is simulated with about 0.5dB/bit. The insertion loss of the LTCC phase shifter integrated with the GaAs FET SPDT switches and phase error are measured to be about 2.3dB/bit and less than 15°, respectively. In addition, beam scanning with angles of ±30 degrees was successfully achieved with 10 Mbps MSK signal from the 16-element active integrated phased array antenna.
设计了用于有源集成相控阵天线(AIPAA)波束方向控制的5.8 GHz频段数字移相器。集成GaAs FET SPDT开关的4位移相器集成在LTCC衬底上。我们实现了一个低损耗的4位LTCC移相器，尺寸为10 mm × 13 mm × 0.55 mm。从仿真结果来看，不带开关的LTCC移相器的插入损耗仿真值约为0.5dB/bit。与GaAs FET SPDT开关集成的LTCC移相器的插入损耗和相位误差分别为2.3dB/bit和小于15°。此外，利用16元有源集成相控阵天线的10 Mbps MSK信号，成功实现了±30度角的波束扫描。
{"title":"A 16-element power AIPAA with a 4-bit digital LTCC phase shifter operating at the 5.8 GHz-band for wireless communication and power transmission","authors":"K. Yamashita, Takeshi Yamamoto, H. Seita, E. Shimane, S. Kawasaki","doi":"10.1109/RWS.2010.5434181","DOIUrl":"https://doi.org/10.1109/RWS.2010.5434181","url":null,"abstract":"5.8 GHz band digital phase shifters to control a beam direction for an Active Integrated Phased Array Antenna (AIPAA) are designed. The 4-bit phase shifters with integrated GaAs FET SPDT switches are integrated with an LTCC substrate. We realized a low loss 4-bit LTCC phase shifter with the size of 10 mm × 13 mm × 0.55 mm. From the simulation results, the insertion loss of LTCC phase shifter without the switch is simulated with about 0.5dB/bit. The insertion loss of the LTCC phase shifter integrated with the GaAs FET SPDT switches and phase error are measured to be about 2.3dB/bit and less than 15°, respectively. In addition, beam scanning with angles of ±30 degrees was successfully achieved with 10 Mbps MSK signal from the 16-element active integrated phased array antenna.","PeriodicalId":334671,"journal":{"name":"2010 IEEE Radio and Wireless Symposium (RWS)","volume":"25 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121014645","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 : 2010-01-10DOI: 10.1109/RWS.2010.5434216
Deepak R. Joshi, D. Popescu, O. Dobre
In this paper, we investigate dynamic adaptation of the spectrum sensing threshold in cognitive radio systems. We use a filter bank approach for spectrum sensing, in which the available spectrum is divided into sub-bands, and obtain the optimal threshold values by minimizing the corresponding spectrum sensing error subject to constraints on the probabilities of missed detection and false alarms for each sub-bands. Furthermore, we propose a gradient descent based algorithm for threshold adaptation in dynamic scenarios, and provide numerical results obtained from simulations, these show how the proposed algorithm adjusts the threshold dynamically to minimize the spectrum sensing error subject to specified constraints.
{"title":"Dynamic threshold adaptation for spectrum sensing in cognitive radio systems","authors":"Deepak R. Joshi, D. Popescu, O. Dobre","doi":"10.1109/RWS.2010.5434216","DOIUrl":"https://doi.org/10.1109/RWS.2010.5434216","url":null,"abstract":"In this paper, we investigate dynamic adaptation of the spectrum sensing threshold in cognitive radio systems. We use a filter bank approach for spectrum sensing, in which the available spectrum is divided into sub-bands, and obtain the optimal threshold values by minimizing the corresponding spectrum sensing error subject to constraints on the probabilities of missed detection and false alarms for each sub-bands. Furthermore, we propose a gradient descent based algorithm for threshold adaptation in dynamic scenarios, and provide numerical results obtained from simulations, these show how the proposed algorithm adjusts the threshold dynamically to minimize the spectrum sensing error subject to specified constraints.","PeriodicalId":334671,"journal":{"name":"2010 IEEE Radio and Wireless Symposium (RWS)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121104935","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 : 2010-01-10DOI: 10.1109/RWS.2010.5434191
Xuetao Chen, S. Hasan, T. Bose, Jeffrey H. Reed
The allocation of communication power consumption and computing rate is inherently one of the cross-layer problems in wireless distributed computing networks (WDCNs). This paper exploits a subgradient approach to choose the optimal power-rate pair for maximizing the network computing capability and minimizing the power consumption. The impact of heterogeneous channel conditions for different nodes are modeled as a penalty term in the objective function to balance the performance and power consumption, and increase the amount of the power for the computing task. Simulation results show that both energy efficiency and the distributed computing power ratio (DCPR) can be increased by considering the wireless channel conditions. These results provide some guidelines for designing the protocol dedicated to WDCNs.
{"title":"Cross-layer resource allocation for wireless distributed computing networks","authors":"Xuetao Chen, S. Hasan, T. Bose, Jeffrey H. Reed","doi":"10.1109/RWS.2010.5434191","DOIUrl":"https://doi.org/10.1109/RWS.2010.5434191","url":null,"abstract":"The allocation of communication power consumption and computing rate is inherently one of the cross-layer problems in wireless distributed computing networks (WDCNs). This paper exploits a subgradient approach to choose the optimal power-rate pair for maximizing the network computing capability and minimizing the power consumption. The impact of heterogeneous channel conditions for different nodes are modeled as a penalty term in the objective function to balance the performance and power consumption, and increase the amount of the power for the computing task. Simulation results show that both energy efficiency and the distributed computing power ratio (DCPR) can be increased by considering the wireless channel conditions. These results provide some guidelines for designing the protocol dedicated to WDCNs.","PeriodicalId":334671,"journal":{"name":"2010 IEEE Radio and Wireless Symposium (RWS)","volume":"280 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121406001","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 : 2010-01-10DOI: 10.1109/RWS.2010.5434232
A. Lackpour, P. Mookiah, M. Olivieri, K. Dandekar
This paper evaluates the reconfigurability of a 2D fractal tree antenna to improve the capacity of a 2×2 MIMO link using pattern diversity. Each fractal tree antenna possesses several degrees of freedom: number of fractal stages, branches per stage, angle between branches, and parent-to-child branch scaling length. Simulations of various Reconfigurable Printed Fractal Tree Arrays (RPFTAs) are conducted so their spatial correlation and MIMO channel capacity can be found. Capacity improvement from two different RPFTAs are reported, assuming a perfect feedback channel.
{"title":"Evaluation of the reconfigurable Printed Fractal Tree antenna for enhanced pattern diversity in MIMO systems","authors":"A. Lackpour, P. Mookiah, M. Olivieri, K. Dandekar","doi":"10.1109/RWS.2010.5434232","DOIUrl":"https://doi.org/10.1109/RWS.2010.5434232","url":null,"abstract":"This paper evaluates the reconfigurability of a 2D fractal tree antenna to improve the capacity of a 2×2 MIMO link using pattern diversity. Each fractal tree antenna possesses several degrees of freedom: number of fractal stages, branches per stage, angle between branches, and parent-to-child branch scaling length. Simulations of various Reconfigurable Printed Fractal Tree Arrays (RPFTAs) are conducted so their spatial correlation and MIMO channel capacity can be found. Capacity improvement from two different RPFTAs are reported, assuming a perfect feedback channel.","PeriodicalId":334671,"journal":{"name":"2010 IEEE Radio and Wireless Symposium (RWS)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114263905","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 : 2010-01-10DOI: 10.1109/RWS.2010.5434159
Yang Li, D. Prikhodko, Rick Zhu, Hichem Abdallah, S. Nabokin, Maxim Batrin, Y. Tkachenko
This paper presents an approach to design high directivity couplers on compact multilayer power amplifier module (PAM). Coplanar and bilevel coupled lines structures are analyzed and compared. The effects of layout are investigated. A bilevel coupled line coupler is developed and integrated into 700MHz UMTS 3×3mm2 PAM. It achieves more than 28dB directivity and the coupling factor variation of PAM is within ±0.15dB under VSWR 2.5∶1.
{"title":"A compact high directivity coupler with ±0.15dB error under VSWR 2.5∶1 for 3×3mm2 UMTS power amplifier modules","authors":"Yang Li, D. Prikhodko, Rick Zhu, Hichem Abdallah, S. Nabokin, Maxim Batrin, Y. Tkachenko","doi":"10.1109/RWS.2010.5434159","DOIUrl":"https://doi.org/10.1109/RWS.2010.5434159","url":null,"abstract":"This paper presents an approach to design high directivity couplers on compact multilayer power amplifier module (PAM). Coplanar and bilevel coupled lines structures are analyzed and compared. The effects of layout are investigated. A bilevel coupled line coupler is developed and integrated into 700MHz UMTS 3×3mm2 PAM. It achieves more than 28dB directivity and the coupling factor variation of PAM is within ±0.15dB under VSWR 2.5∶1.","PeriodicalId":334671,"journal":{"name":"2010 IEEE Radio and Wireless Symposium (RWS)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126994847","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 : 2010-01-10DOI: 10.1109/RWS.2010.5434156
Yazhou Wang, Yunqiang Yang, A. Fathy
A reconfigurable ultra-wideband system for through wall imaging application has been developed. The radar operating frequency can be selected to cover either 2–4 GHz or 8–10 GHz UWB bands. The lower UWB band is used to minimize through wall attenuation for relatively high loss wall materials, but the upper band can be utilized to achieve high image resolution for relatively low loss walls. A synthetic aperture radar has been developed that utilizes a wideband tapered slot Vivaldi array and covers an ultra wide frequency range, extending over 2–10 GHz; thus covering both regions. The developed beam-forming algorithm is based on near field models, and accounts for wall effects. Both the wave refraction and propagation speed changes are taken into considerations to obtain accurate images of various targets. Real-time experiments have been performed through both dry-walls and brick-walls to validate the performance of the radar system.
{"title":"A reconfigurable UWB system for real-time through wall imaging applications","authors":"Yazhou Wang, Yunqiang Yang, A. Fathy","doi":"10.1109/RWS.2010.5434156","DOIUrl":"https://doi.org/10.1109/RWS.2010.5434156","url":null,"abstract":"A reconfigurable ultra-wideband system for through wall imaging application has been developed. The radar operating frequency can be selected to cover either 2–4 GHz or 8–10 GHz UWB bands. The lower UWB band is used to minimize through wall attenuation for relatively high loss wall materials, but the upper band can be utilized to achieve high image resolution for relatively low loss walls. A synthetic aperture radar has been developed that utilizes a wideband tapered slot Vivaldi array and covers an ultra wide frequency range, extending over 2–10 GHz; thus covering both regions. The developed beam-forming algorithm is based on near field models, and accounts for wall effects. Both the wave refraction and propagation speed changes are taken into considerations to obtain accurate images of various targets. Real-time experiments have been performed through both dry-walls and brick-walls to validate the performance of the radar system.","PeriodicalId":334671,"journal":{"name":"2010 IEEE Radio and Wireless Symposium (RWS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125515931","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 : 2010-01-10DOI: 10.1109/RWS.2010.5434223
K. Grenier, D. Dubuc, P. Poleni, M. Kumemura, H. Toshiyoshi, T. Fujii, H. Fujita
This publication deals with a resonant RF-based biosensor for in-liquid operation. Stop-band filter modeling and characterizations are investigated in order to discriminate dead and alive suspensions of human cultured cells. This proof of concept demonstrator features noticeable contrasts on both resonant frequency (7%) and amplitude (2.1 dB). Theses results consequently demonstrate that RF detection can provide a non invasive sensing technique, which is compatible with a lab-on-a-chip approach to discriminate the pathological state of cells.
{"title":"Resonant based microwave biosensor for biological cells discrimination","authors":"K. Grenier, D. Dubuc, P. Poleni, M. Kumemura, H. Toshiyoshi, T. Fujii, H. Fujita","doi":"10.1109/RWS.2010.5434223","DOIUrl":"https://doi.org/10.1109/RWS.2010.5434223","url":null,"abstract":"This publication deals with a resonant RF-based biosensor for in-liquid operation. Stop-band filter modeling and characterizations are investigated in order to discriminate dead and alive suspensions of human cultured cells. This proof of concept demonstrator features noticeable contrasts on both resonant frequency (7%) and amplitude (2.1 dB). Theses results consequently demonstrate that RF detection can provide a non invasive sensing technique, which is compatible with a lab-on-a-chip approach to discriminate the pathological state of cells.","PeriodicalId":334671,"journal":{"name":"2010 IEEE Radio and Wireless Symposium (RWS)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126571638","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 : 2010-01-10DOI: 10.1109/RWS.2010.5434221
Jinseong Jeong, D. Kimball, M. Kwak, P. Draxler, P. Asbeck
This paper presents a new technique to reduce the peak-to-average power ratio (PAPR) of the RF input signals used in envelope tracking (ET) power amplifiers without degrading the linearity and efficiency performance of the RF stages. Due to heavy gain compression, ET amplifiers can suffer from inefficient driver stages. The reduced PAPR RF input signal improves the efficiency of the driver amplifier thereby potentially improving the overall efficiency of the ET amplifier. This technique is demonstrated for a single carrier WCDMA signal using a dynamic supply modulator and a RF stage based on a GaAs HVHBT. The measurement shows that a power added efficiency (PAE) of 74% can be maintained for the RF stage while the PAPR of the RF input signal is reduced from 7.6 dB to 5.2 dB. The overall PAE accounting for the supply modulator is greater than 50% with an average output power of greater than 26 W and an adjacent channel leakage ratio of less than −45 and −53 dBc at 5- and 10-MHz frequency offsets, respectively.
{"title":"Envelope tracking power amplifiers with reduced peak-to-average power ratio RF input signals","authors":"Jinseong Jeong, D. Kimball, M. Kwak, P. Draxler, P. Asbeck","doi":"10.1109/RWS.2010.5434221","DOIUrl":"https://doi.org/10.1109/RWS.2010.5434221","url":null,"abstract":"This paper presents a new technique to reduce the peak-to-average power ratio (PAPR) of the RF input signals used in envelope tracking (ET) power amplifiers without degrading the linearity and efficiency performance of the RF stages. Due to heavy gain compression, ET amplifiers can suffer from inefficient driver stages. The reduced PAPR RF input signal improves the efficiency of the driver amplifier thereby potentially improving the overall efficiency of the ET amplifier. This technique is demonstrated for a single carrier WCDMA signal using a dynamic supply modulator and a RF stage based on a GaAs HVHBT. The measurement shows that a power added efficiency (PAE) of 74% can be maintained for the RF stage while the PAPR of the RF input signal is reduced from 7.6 dB to 5.2 dB. The overall PAE accounting for the supply modulator is greater than 50% with an average output power of greater than 26 W and an adjacent channel leakage ratio of less than −45 and −53 dBc at 5- and 10-MHz frequency offsets, respectively.","PeriodicalId":334671,"journal":{"name":"2010 IEEE Radio and Wireless Symposium (RWS)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126709758","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 : 2010-01-10DOI: 10.1109/RWS.2010.5434195
L. Yeung, Y. Wang
A practical method for decoupling small-form two- and four-element antenna arrays is discussed. This method is generic in the sense that it works on any types of antenna elements as long as they are identical and symmetrically arranged. The basic principle is to use a passive multi-port network to separate out various orthogonal radiation modes of a highly-coupled array for transmission and reception. In other words, the array as a whole, rather than each element, is treated as a single radiation entity. As these mutually orthogonal modes are uncorrelated and have no real energy exchange among them, the network ports associated with these modes are well isolated from each other. Therefore, problems on impedance matching and signal correlation due to close spacing of elements in traditional compact arrays can be avoided. Experimental arrays of four-element with around 0.1λ element-to-element separation have been fabricated and tested to demonstrate the practicability of the idea. Measurement results are in good agreement with expectations, showing promising potential of the proposed approach for miniaturized arrays in handheld terminals.
{"title":"A decoupling technique for compact antenna arrays in handheld terminals","authors":"L. Yeung, Y. Wang","doi":"10.1109/RWS.2010.5434195","DOIUrl":"https://doi.org/10.1109/RWS.2010.5434195","url":null,"abstract":"A practical method for decoupling small-form two- and four-element antenna arrays is discussed. This method is generic in the sense that it works on any types of antenna elements as long as they are identical and symmetrically arranged. The basic principle is to use a passive multi-port network to separate out various orthogonal radiation modes of a highly-coupled array for transmission and reception. In other words, the array as a whole, rather than each element, is treated as a single radiation entity. As these mutually orthogonal modes are uncorrelated and have no real energy exchange among them, the network ports associated with these modes are well isolated from each other. Therefore, problems on impedance matching and signal correlation due to close spacing of elements in traditional compact arrays can be avoided. Experimental arrays of four-element with around 0.1λ element-to-element separation have been fabricated and tested to demonstrate the practicability of the idea. Measurement results are in good agreement with expectations, showing promising potential of the proposed approach for miniaturized arrays in handheld terminals.","PeriodicalId":334671,"journal":{"name":"2010 IEEE Radio and Wireless Symposium (RWS)","volume":"236 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132160794","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 : 2010-01-10DOI: 10.1109/RWS.2010.5434178
T. Seki, K. Nishimori, K. Hiraga, K. Nishikawa
System studies are being conducted at millimeter-wave frequency for high-speed wireless communications such as several Gbit/s. However, the highly rectilinear propagation characteristics of these systems, created by the millimeter-wave frequencies, place significant limitations on the applications and the usage environments. To address this problem, we already proposed the adoption of a high data-rate relay system using short range multi input multi output (MIMO) transmission technology. This paper reports the results of experiments conducted to verify the simulation method. We evaluate 4x4 MIMO transmission, using the signal specified by IEEE 802.11n, and confirm that the optimal array spacing. The measured and simulated frequency utilization rates of 4×4 MIMO transmission are in good agreement. Frequency utilization of over 20 bits/s/Hz can be achieved: 800Mbps/1.6Gbps transmission can be realized when the bandwidth of 40/80 MHz is assumed. Moreover, the measured and simulated results indicate higher frequency utilization rates than found in the i.i.d. channel.
{"title":"Experimental evaluation of high speed parallel data transmission technology for wireless repeater system","authors":"T. Seki, K. Nishimori, K. Hiraga, K. Nishikawa","doi":"10.1109/RWS.2010.5434178","DOIUrl":"https://doi.org/10.1109/RWS.2010.5434178","url":null,"abstract":"System studies are being conducted at millimeter-wave frequency for high-speed wireless communications such as several Gbit/s. However, the highly rectilinear propagation characteristics of these systems, created by the millimeter-wave frequencies, place significant limitations on the applications and the usage environments. To address this problem, we already proposed the adoption of a high data-rate relay system using short range multi input multi output (MIMO) transmission technology. This paper reports the results of experiments conducted to verify the simulation method. We evaluate 4x4 MIMO transmission, using the signal specified by IEEE 802.11n, and confirm that the optimal array spacing. The measured and simulated frequency utilization rates of 4×4 MIMO transmission are in good agreement. Frequency utilization of over 20 bits/s/Hz can be achieved: 800Mbps/1.6Gbps transmission can be realized when the bandwidth of 40/80 MHz is assumed. Moreover, the measured and simulated results indicate higher frequency utilization rates than found in the i.i.d. channel.","PeriodicalId":334671,"journal":{"name":"2010 IEEE Radio and Wireless Symposium (RWS)","volume":"145 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133767939","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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