Pub Date : 2023-04-17DOI: 10.1109/WAMICON57636.2023.10124905
Connor Nogales, L. Marzall, G. Lasser, Z. Popovic
This paper presents dynamic supply modulation results of a broadband 6–12 GHz 4 × 1 transmit antenna array. The four 2-W GaN MMIC PAs share a 4-level GaN MMIC dynamic power supply. A single GaN MMIC PA is first characterized at 6.5 and 11.5 GHz, and its efficiency while tracking a 10-MHz signal is compared to static drain supply performance, showing 10 percentage point (pp) average efficiency improvement. Four such PAs are then assembled in a modular array of broadband double-ridge dielectrically-loaded horn antennas and characterized under supply modulation. The measured average efficiency when each of the four PAs are terminated with 50Ω is compared to when the PAs are loaded with the antenna array. An average PAE improvement of 3.4 pp is achieved over the static case with the supply modulated array at 6.5 GHz when amplifying a 10-MHz 10.7-dB peak-to-average power ratio (PAPR) signal, not taking the >80% efficient modulator into account. Linearity is characterized in terms noise power ratio (NPR) of the individual PAs, and at 6.5 GHz the improvement ranges from 2 to 6 dB, depending on the PA. To the best of the authors’ knowledge, this is the first demonstration of dynamic supply modulation for broadband array efficiency and linearity enhancement.
{"title":"Dynamic Supply Modulation of a 6 – 12 GHz Transmit Array","authors":"Connor Nogales, L. Marzall, G. Lasser, Z. Popovic","doi":"10.1109/WAMICON57636.2023.10124905","DOIUrl":"https://doi.org/10.1109/WAMICON57636.2023.10124905","url":null,"abstract":"This paper presents dynamic supply modulation results of a broadband 6–12 GHz 4 × 1 transmit antenna array. The four 2-W GaN MMIC PAs share a 4-level GaN MMIC dynamic power supply. A single GaN MMIC PA is first characterized at 6.5 and 11.5 GHz, and its efficiency while tracking a 10-MHz signal is compared to static drain supply performance, showing 10 percentage point (pp) average efficiency improvement. Four such PAs are then assembled in a modular array of broadband double-ridge dielectrically-loaded horn antennas and characterized under supply modulation. The measured average efficiency when each of the four PAs are terminated with 50Ω is compared to when the PAs are loaded with the antenna array. An average PAE improvement of 3.4 pp is achieved over the static case with the supply modulated array at 6.5 GHz when amplifying a 10-MHz 10.7-dB peak-to-average power ratio (PAPR) signal, not taking the >80% efficient modulator into account. Linearity is characterized in terms noise power ratio (NPR) of the individual PAs, and at 6.5 GHz the improvement ranges from 2 to 6 dB, depending on the PA. To the best of the authors’ knowledge, this is the first demonstration of dynamic supply modulation for broadband array efficiency and linearity enhancement.","PeriodicalId":270624,"journal":{"name":"2023 IEEE Wireless and Microwave Technology Conference (WAMICON)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125723076","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 : 2023-04-17DOI: 10.1109/WAMICON57636.2023.10124924
Haifeng Lyu, R. Lovato, S. Gowri, X. Gong, Kenle Chen
This paper presents a novel co-designed Doherty power amplifier (DPA) and a post-matching output bandpass filter. The filter is designed as a matching network to present the desired impedance at the combining node of carrier and peaking paths, thus eliminating the quarter-wave transformer of the conventional Doherty combiner network. This co-design method minimizes the circuit complexity and inter-connection loss, leading to an enhanced overall performance. A prototype is designed and implemented using GaN transistors and third-order Hairpin filter with 20% bandwidth centered at 3.6 GHz. The measured frequency response exhibits desired amplifier-filter function, and Doherty efficiency enhancement are experimentally demonstrated with efficiency of 68% and 55% at saturation and 6-dB back-off regions. Modulated measurement shows excellent linearity (−37-dB adjacent channel leakage ratio) and efficiency (47%) for transmitting the LTE signal with 10.5-dB PAPR.
本文提出了一种新型的Doherty功率放大器(DPA)和后匹配输出带通滤波器。该滤波器被设计成一个匹配网络，在载波和峰值路径的结合节点上呈现所需的阻抗，从而消除了传统Doherty合并网络的四分之一波变压器。这种协同设计方法最大限度地降低了电路复杂性和互连损耗，从而提高了整体性能。利用氮化镓晶体管和三阶发夹滤波器设计并实现了一个以3.6 GHz为中心的20%带宽的原型。测量的频率响应显示出理想的放大-滤波功能，并且Doherty效率增强实验证明在饱和和6db回退区域效率分别为68%和55%。调制测量显示，在传输10.5 db PAPR的LTE信号时，具有出色的线性度(- 37 db相邻信道泄漏比)和效率(47%)。
{"title":"Co-Design of Doherty Power Amplifier and Post-Matching Bandpass Filter","authors":"Haifeng Lyu, R. Lovato, S. Gowri, X. Gong, Kenle Chen","doi":"10.1109/WAMICON57636.2023.10124924","DOIUrl":"https://doi.org/10.1109/WAMICON57636.2023.10124924","url":null,"abstract":"This paper presents a novel co-designed Doherty power amplifier (DPA) and a post-matching output bandpass filter. The filter is designed as a matching network to present the desired impedance at the combining node of carrier and peaking paths, thus eliminating the quarter-wave transformer of the conventional Doherty combiner network. This co-design method minimizes the circuit complexity and inter-connection loss, leading to an enhanced overall performance. A prototype is designed and implemented using GaN transistors and third-order Hairpin filter with 20% bandwidth centered at 3.6 GHz. The measured frequency response exhibits desired amplifier-filter function, and Doherty efficiency enhancement are experimentally demonstrated with efficiency of 68% and 55% at saturation and 6-dB back-off regions. Modulated measurement shows excellent linearity (−37-dB adjacent channel leakage ratio) and efficiency (47%) for transmitting the LTE signal with 10.5-dB PAPR.","PeriodicalId":270624,"journal":{"name":"2023 IEEE Wireless and Microwave Technology Conference (WAMICON)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134083395","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 : 2023-04-17DOI: 10.1109/WAMICON57636.2023.10124897
Ja-Soo Cho, Jaeyong Lee, Changkun Park
In this study, a Ka-band CMOS power amplifier (PA) with wide bandwidth and high flatness to support the full bandwidth of 5G mobile communication was proposed. To obtain wide bandwidth, RC-feedback and inter-digit transformer techniques were applied to the driver stage and matching networks, respectively. In addition, a diode linearizer was applied to the power stage to compensate for the deteriorated output power due to securing wide bandwidth. To verify the feasibility of the proposed Ka-band PA, we designed the PA using a 65-nm RFCMOS process. The designed PA occupies the core area of 0.174 mm2. The measured 1 dB bandwidth and gain were higher than 12 GHz and 13.1 dB, respectively. The measured saturation power, P1dB, and PAE were above 12.53 dBm, 10.8 dBm, and 9.18%, respectively
{"title":"Wide Band CMOS Power Amplifier with High Flatness Using Inter-Digit Transformer and RC-Feedback","authors":"Ja-Soo Cho, Jaeyong Lee, Changkun Park","doi":"10.1109/WAMICON57636.2023.10124897","DOIUrl":"https://doi.org/10.1109/WAMICON57636.2023.10124897","url":null,"abstract":"In this study, a Ka-band CMOS power amplifier (PA) with wide bandwidth and high flatness to support the full bandwidth of 5G mobile communication was proposed. To obtain wide bandwidth, RC-feedback and inter-digit transformer techniques were applied to the driver stage and matching networks, respectively. In addition, a diode linearizer was applied to the power stage to compensate for the deteriorated output power due to securing wide bandwidth. To verify the feasibility of the proposed Ka-band PA, we designed the PA using a 65-nm RFCMOS process. The designed PA occupies the core area of 0.174 mm2. The measured 1 dB bandwidth and gain were higher than 12 GHz and 13.1 dB, respectively. The measured saturation power, P1dB, and PAE were above 12.53 dBm, 10.8 dBm, and 9.18%, respectively","PeriodicalId":270624,"journal":{"name":"2023 IEEE Wireless and Microwave Technology Conference (WAMICON)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123636791","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 : 2023-04-17DOI: 10.1109/WAMICON57636.2023.10124896
M. Grady, T. Weller
Human body tissue-mimicking biological phantoms (bio-phantoms) mimic the electrical and physical properties of actual body tissue and are useful structures for validating wireless thermometer performance. A hybrid bio-phantom testbed designed to operate with an antenna system is presented. The hybrid bio-phantom has realistic dielectric properties and is well matched to the antenna. Reflection properties are validated for an antenna-phantom testbed, and the properties show an accurate prediction for the characteristics of a realistic finite thickness multilayered human body from 0.4 to 3 GHz.
{"title":"A Hybrid Skin, Fat, and Muscle Human Body Tissue-Mimicking Biological Phantom and Antenna Testbed","authors":"M. Grady, T. Weller","doi":"10.1109/WAMICON57636.2023.10124896","DOIUrl":"https://doi.org/10.1109/WAMICON57636.2023.10124896","url":null,"abstract":"Human body tissue-mimicking biological phantoms (bio-phantoms) mimic the electrical and physical properties of actual body tissue and are useful structures for validating wireless thermometer performance. A hybrid bio-phantom testbed designed to operate with an antenna system is presented. The hybrid bio-phantom has realistic dielectric properties and is well matched to the antenna. Reflection properties are validated for an antenna-phantom testbed, and the properties show an accurate prediction for the characteristics of a realistic finite thickness multilayered human body from 0.4 to 3 GHz.","PeriodicalId":270624,"journal":{"name":"2023 IEEE Wireless and Microwave Technology Conference (WAMICON)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125450462","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 : 2023-04-17DOI: 10.1109/WAMICON57636.2023.10124913
N. Miller, Alexis Brown, Michael Elliott, R. Gilbert
This paper presents for the first time a temperature dependent ASM-HEMT model extracted from a gallium nitride (GaN) high electron mobility transistor (HEMT) validated with Ka-band on-wafer large-signal measurements. Modifications are made to the standard ASM-HEMT model to accurately model the DC, small-signal, and large-signal measurements collected as a function of ambient temperature. This work could shed light on the temperature dependence of GaN HEMTs and could enable the rapid design of high temperature integrated circuits.
{"title":"Temperature Dependent Large-Signal Modeling of GaN HEMTs at Ka-Band using the ASM-HEMT","authors":"N. Miller, Alexis Brown, Michael Elliott, R. Gilbert","doi":"10.1109/WAMICON57636.2023.10124913","DOIUrl":"https://doi.org/10.1109/WAMICON57636.2023.10124913","url":null,"abstract":"This paper presents for the first time a temperature dependent ASM-HEMT model extracted from a gallium nitride (GaN) high electron mobility transistor (HEMT) validated with Ka-band on-wafer large-signal measurements. Modifications are made to the standard ASM-HEMT model to accurately model the DC, small-signal, and large-signal measurements collected as a function of ambient temperature. This work could shed light on the temperature dependence of GaN HEMTs and could enable the rapid design of high temperature integrated circuits.","PeriodicalId":270624,"journal":{"name":"2023 IEEE Wireless and Microwave Technology Conference (WAMICON)","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114292631","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 : 2023-04-17DOI: 10.1109/WAMICON57636.2023.10124908
Isabela Buitron-Burbano, C. A. Perez-Lopez, A. Ávila
The promises of 5G for high-speed internet and complete connectivity, anytime, anywhere and for anyone within a consumer electronics sector, rises concerns for possible signal interference and imposes the need for EM shielding solutions. We present the design and fabrication of a 3D printed hexagonal mesh (13 x 9 x 0.05) cm3 with unit cell maximal diameter 2.7 mm to reduce EM penetration at 2.4 GHz and 5 GHz. The mesh was characterized in an anechoic chamber adapting the MIL-STD-285 standard to vary the mesh-receiver antenna separation distance. The results show that the mesh exhibits a high SEA with a low SER for both frequencies and a total SE of 15 dB for 5 GHz, 23.66% higher than for 2.4 GHz. The closer the mesh to the receiver, the superior the absorption capacity. Attenuation could be explained by the destructive interference associated to the combination of composite filament in a concentric structure.
在消费电子行业，5G承诺随时随地为任何人提供高速互联网和完整连接，这引发了对可能的信号干扰的担忧，并提出了对电磁屏蔽解决方案的需求。我们设计和制造了一个3D打印的六边形网格(13 x 9 x 0.05) cm3，单元最大直径2.7 mm，以减少2.4 GHz和5 GHz的EM穿透。采用MIL-STD-285标准在消声室中对网格进行了表征，以改变网格与接收机天线的分离距离。结果表明，该网格在两种频率下均表现出较高的SEA和较低的SE，在5 GHz时总SE为15 dB，比2.4 GHz时高23.66%。网片离接收器越近，吸收能力越强。衰减可以用复合灯丝在同心结构中的结合所产生的相消干涉来解释。
{"title":"3D Printed Composite Mesh for EM Shielding Applications","authors":"Isabela Buitron-Burbano, C. A. Perez-Lopez, A. Ávila","doi":"10.1109/WAMICON57636.2023.10124908","DOIUrl":"https://doi.org/10.1109/WAMICON57636.2023.10124908","url":null,"abstract":"The promises of 5G for high-speed internet and complete connectivity, anytime, anywhere and for anyone within a consumer electronics sector, rises concerns for possible signal interference and imposes the need for EM shielding solutions. We present the design and fabrication of a 3D printed hexagonal mesh (13 x 9 x 0.05) cm3 with unit cell maximal diameter 2.7 mm to reduce EM penetration at 2.4 GHz and 5 GHz. The mesh was characterized in an anechoic chamber adapting the MIL-STD-285 standard to vary the mesh-receiver antenna separation distance. The results show that the mesh exhibits a high SEA with a low SER for both frequencies and a total SE of 15 dB for 5 GHz, 23.66% higher than for 2.4 GHz. The closer the mesh to the receiver, the superior the absorption capacity. Attenuation could be explained by the destructive interference associated to the combination of composite filament in a concentric structure.","PeriodicalId":270624,"journal":{"name":"2023 IEEE Wireless and Microwave Technology Conference (WAMICON)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131261495","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 : 2023-04-17DOI: 10.1109/WAMICON57636.2023.10124910
Hae-in Kim, Alexander Wilcher, Woosol Lee, Shelby Nelson, Y. Yoon
Metaconductor-based 64-element 3D array antenna-in-packaging (AiP) on fused silica substrates is presented for highly energy efficient 5G new radio wireless communications in a millimeter-wave (mm-wave) spectrum. The deployment of the Copper (Cu)/Cobalt (Co) metaconductor improves the efficiency of AiP at 28 GHz by reducing the conductor loss associated with the skin effect. The 3D AiP configuration enhances antenna performance by relieving the electromagnetic coupling and increasing antenna bandwidth. The AiP was designed on a multilayered fused silica substrate using the finite element method. The devices were prototyped using microfabrication and wafer bonding techniques. The Cu/Co metaconductor-based AiP showed a 10-dB bandwidth of 2 GHz at 28 GHz and a 9 dB gain improvement when compared to the Cu counterpart.
{"title":"Highly Energy Efficient 64-element Array Antenna Based on Cu/Co Metaconductor and Fused Silica","authors":"Hae-in Kim, Alexander Wilcher, Woosol Lee, Shelby Nelson, Y. Yoon","doi":"10.1109/WAMICON57636.2023.10124910","DOIUrl":"https://doi.org/10.1109/WAMICON57636.2023.10124910","url":null,"abstract":"Metaconductor-based 64-element 3D array antenna-in-packaging (AiP) on fused silica substrates is presented for highly energy efficient 5G new radio wireless communications in a millimeter-wave (mm-wave) spectrum. The deployment of the Copper (Cu)/Cobalt (Co) metaconductor improves the efficiency of AiP at 28 GHz by reducing the conductor loss associated with the skin effect. The 3D AiP configuration enhances antenna performance by relieving the electromagnetic coupling and increasing antenna bandwidth. The AiP was designed on a multilayered fused silica substrate using the finite element method. The devices were prototyped using microfabrication and wafer bonding techniques. The Cu/Co metaconductor-based AiP showed a 10-dB bandwidth of 2 GHz at 28 GHz and a 9 dB gain improvement when compared to the Cu counterpart.","PeriodicalId":270624,"journal":{"name":"2023 IEEE Wireless and Microwave Technology Conference (WAMICON)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131603335","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 : 2023-04-17DOI: 10.1109/WAMICON57636.2023.10124893
Faheem Shaikh, S. Laha
An in-vitro study for non-invasive glucose detection using the method of electromagnetic (microwave) sensing is conducted using the programmable and tunable software-defined radio (SDR). The study determines the frequency or a range of frequency that is found to exhibit the highest correlation with different glucose concentration. The transmitted frequency range varies between 700 MHz to 6 GHz. When the transmitted base-band signal from the SDR is modulated at a specific carrier frequency and is allowed to pass through a glucose solution, the receiver end of the SDR detects the power level at the base-band power spectrum. It has been observed at center frequencies below 2.4 GHz, the power level is highly linear with glucose concentration. Specifically, the highest correlation is observed at a frequency of 1.7 GHz at which the application of simple linear regression led to R-squared coefficients of 91%. So far, to our knowledge there has been no such systematic study on frequency characterization to determine the frequency that has the highest correlation of power level with variation in glucose concentration.
{"title":"Frequency Characterization for Glucose Detection with Software Defined Radio","authors":"Faheem Shaikh, S. Laha","doi":"10.1109/WAMICON57636.2023.10124893","DOIUrl":"https://doi.org/10.1109/WAMICON57636.2023.10124893","url":null,"abstract":"An in-vitro study for non-invasive glucose detection using the method of electromagnetic (microwave) sensing is conducted using the programmable and tunable software-defined radio (SDR). The study determines the frequency or a range of frequency that is found to exhibit the highest correlation with different glucose concentration. The transmitted frequency range varies between 700 MHz to 6 GHz. When the transmitted base-band signal from the SDR is modulated at a specific carrier frequency and is allowed to pass through a glucose solution, the receiver end of the SDR detects the power level at the base-band power spectrum. It has been observed at center frequencies below 2.4 GHz, the power level is highly linear with glucose concentration. Specifically, the highest correlation is observed at a frequency of 1.7 GHz at which the application of simple linear regression led to R-squared coefficients of 91%. So far, to our knowledge there has been no such systematic study on frequency characterization to determine the frequency that has the highest correlation of power level with variation in glucose concentration.","PeriodicalId":270624,"journal":{"name":"2023 IEEE Wireless and Microwave Technology Conference (WAMICON)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131054529","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 : 2023-04-17DOI: 10.1109/WAMICON57636.2023.10124886
Jasmin Gabsteiger, Tim Maiwald, Simon Wünsche, R. Weigel, F. Lurz
This paper presents the combination of an existing computer vision model with a highly integrated mm-wave radar system for automated radar data labeling. A pre trained model for person presence detection is used in combination with a camera sensor to determine, whether a person is present or not. The binary prediction is used to label simultaneously measured radar data of the same scenery. The paper addresses the challenges of varying illumination conditions, camera and radar sensor aperture angles and data quality which are dominant influences at the labeling process. The system significantly decreases human effort by automating the labeling process. It is used to generate 10,000 data points, label them and train a neural network with 95.7% accuracy. Finally, a proof-of-concept, training, and evaluation of radar-based activity detection with automatically labeled data is presented. The proposed method can contribute in person presence detection under challenging light conditions.
{"title":"Automated Radar Data Labeling through Computer Vision","authors":"Jasmin Gabsteiger, Tim Maiwald, Simon Wünsche, R. Weigel, F. Lurz","doi":"10.1109/WAMICON57636.2023.10124886","DOIUrl":"https://doi.org/10.1109/WAMICON57636.2023.10124886","url":null,"abstract":"This paper presents the combination of an existing computer vision model with a highly integrated mm-wave radar system for automated radar data labeling. A pre trained model for person presence detection is used in combination with a camera sensor to determine, whether a person is present or not. The binary prediction is used to label simultaneously measured radar data of the same scenery. The paper addresses the challenges of varying illumination conditions, camera and radar sensor aperture angles and data quality which are dominant influences at the labeling process. The system significantly decreases human effort by automating the labeling process. It is used to generate 10,000 data points, label them and train a neural network with 95.7% accuracy. Finally, a proof-of-concept, training, and evaluation of radar-based activity detection with automatically labeled data is presented. The proposed method can contribute in person presence detection under challenging light conditions.","PeriodicalId":270624,"journal":{"name":"2023 IEEE Wireless and Microwave Technology Conference (WAMICON)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123804929","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 : 2023-04-17DOI: 10.1109/WAMICON57636.2023.10124889
Huseyin Babaroglu, L. Anttila, Guixian Xu, Matias Turunen, M. Allén, M. Valkama
In this paper, we study the feasibility of digital post-distortion (DPoD) based mitigation of transmitter nonlinear distortion in cellular networks. With specific emphasis on downlink, we describe a computationally efficient one-shot method to estimate and mitigate the cascaded multipath channel and transmitter nonlinear distortion effects at terminal receiver, building on demodulation reference symbols (DMRSs). We also describe a DMRS boosting approach to match the envelope characteristics of the DMRS and the actual data-bearing multicarrier symbols such that accurate mitigation is feasible. We provide RF measurement results with a state-of-the-art 28 GHz active antenna array and 256-QAM data modulation, demonstrating larger performance enhancements in received signal error vector magnitude (EVM) compared to existing computationally expensive iterative methods.
{"title":"Cellular Digital Post-Distortion: Signal Processing Methods and RF Measurements","authors":"Huseyin Babaroglu, L. Anttila, Guixian Xu, Matias Turunen, M. Allén, M. Valkama","doi":"10.1109/WAMICON57636.2023.10124889","DOIUrl":"https://doi.org/10.1109/WAMICON57636.2023.10124889","url":null,"abstract":"In this paper, we study the feasibility of digital post-distortion (DPoD) based mitigation of transmitter nonlinear distortion in cellular networks. With specific emphasis on downlink, we describe a computationally efficient one-shot method to estimate and mitigate the cascaded multipath channel and transmitter nonlinear distortion effects at terminal receiver, building on demodulation reference symbols (DMRSs). We also describe a DMRS boosting approach to match the envelope characteristics of the DMRS and the actual data-bearing multicarrier symbols such that accurate mitigation is feasible. We provide RF measurement results with a state-of-the-art 28 GHz active antenna array and 256-QAM data modulation, demonstrating larger performance enhancements in received signal error vector magnitude (EVM) compared to existing computationally expensive iterative methods.","PeriodicalId":270624,"journal":{"name":"2023 IEEE Wireless and Microwave Technology Conference (WAMICON)","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126782288","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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