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Efficient Inverse Covariance Matrix Estimation for Low-Complexity Closed-Loop DPD Systems 低复杂度闭环DPD系统的有效逆协方差矩阵估计
2021 IEEE MTT-S International Wireless Symposium (IWS) Pub Date : 2021-05-23 DOI: 10.1109/IWS52775.2021.9499480
P. Campo, L. Anttila, Vesa Lampu, Yan Guo, Neng Wang, M. Valkama
{"title":"Efficient Inverse Covariance Matrix Estimation for Low-Complexity Closed-Loop DPD Systems","authors":"P. Campo, L. Anttila, Vesa Lampu, Yan Guo, Neng Wang, M. Valkama","doi":"10.1109/IWS52775.2021.9499480","DOIUrl":"https://doi.org/10.1109/IWS52775.2021.9499480","url":null,"abstract":"This paper studies closed-loop digital predistortion systems, with special focus on linearization of mmW active antenna arrays. Considering the beam-dependent nonlinear dis - tortion and very high DPD processing rates, a modified self-orthogonalized (SO) learning solution is proposed, which is capable of reducing the computational complexity compared to other similar solutions, while at the same time obtaining a comparable linearization performance. The modified SO consits of a novel method for efficiently calculating the inverse of the input data covariance matrix. Thorough RF measurement results at 28 GHz band featuring a state-of-the-art 64 element active array and channel bandwidths up to 800 MHz, are reported A complexity analysis is also carried out which, together with the obtained results, allow to asses the performance-complexity trade-offs. Altogether, the results show that the proposed methods can facilitate efficient mmW active antenna array linearization.","PeriodicalId":260591,"journal":{"name":"2021 IEEE MTT-S International Wireless Symposium (IWS)","volume":"157 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133806745","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}
引用次数: 0
A Miniaturized Bandpass Filter Basing on HMSIW Loaded Dual-mode CSRR 基于HMSIW负载双模CSRR的小型化带通滤波器
2021 IEEE MTT-S International Wireless Symposium (IWS) Pub Date : 2021-05-23 DOI: 10.1109/IWS52775.2021.9499651
Baokun Jin, Pingjuan Zhang, Jundui Mu, Man Zhang, Minquan Li
{"title":"A Miniaturized Bandpass Filter Basing on HMSIW Loaded Dual-mode CSRR","authors":"Baokun Jin, Pingjuan Zhang, Jundui Mu, Man Zhang, Minquan Li","doi":"10.1109/IWS52775.2021.9499651","DOIUrl":"https://doi.org/10.1109/IWS52775.2021.9499651","url":null,"abstract":"In this paper, a miniaturized bandpass filter is proposed basing on half-mode substrate integrated waveguide (HMSIW) loaded dual-mode complementary split-ring resonator (CSRR). The HMSIW is a derivative of substrate integrated waveguide(SIW), and the dimension is 50% of the SIW, so it is more conducive to decrease the size of the filter. Meanwhile, the dual-mode CSRR is loaded on the HMSIW, which can further reduce the size of the filter. Besides, loading dual-mode CSRR can obtain a wider operating bandwidth and generate two transmission zeros in the upper sideband to enhance the frequency selectivity compare with loading traditional CSRR. To verify the validity, the miniaturized bandpass filter is designed and optimized in HFSS software. The simulation results show that the center frequency is 7.44 GHz, 3-dB fractional bandwidth is 16.9% from 6.84 to 8.10 GHz. The final size of the filter is 0.167ƛg×0.463ƛg, the miniaturization design of the filter is realized.","PeriodicalId":260591,"journal":{"name":"2021 IEEE MTT-S International Wireless Symposium (IWS)","volume":"520 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134063309","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}
引用次数: 5
A Fast Sparse Bayesian Pursuit Approach for Power Amplifier Linearization 功率放大器线性化的快速稀疏贝叶斯追踪方法
2021 IEEE MTT-S International Wireless Symposium (IWS) Pub Date : 2021-05-23 DOI: 10.1109/IWS52775.2021.9499382
C. Crespo-Cadenas, M. J. Madero-Ayora, Juan A. Becerra, S. Cruces
{"title":"A Fast Sparse Bayesian Pursuit Approach for Power Amplifier Linearization","authors":"C. Crespo-Cadenas, M. J. Madero-Ayora, Juan A. Becerra, S. Cruces","doi":"10.1109/IWS52775.2021.9499382","DOIUrl":"https://doi.org/10.1109/IWS52775.2021.9499382","url":null,"abstract":"In this paper, a fast pursuit algorithm based on a Bayesian approach is proposed for pruning behavioral models of power amplifiers (PAs). This approach, referred to as sparse Bayesian pursuit (SBP), is compared to two previously reported pruning algorithms: orthogonal matching pursuit (OMP) and doubly OMP (DOMP). The three approaches are benchmarked with experimental data provided by a class AB PA driven by a 30-MHz 5G New Radio signal. The new sparse Bayesian pursuit approach outperforms the OMP in both modeling and linearization capabilities, while it reduces the computational cost with respect to the DOMP algorithm.","PeriodicalId":260591,"journal":{"name":"2021 IEEE MTT-S International Wireless Symposium (IWS)","volume":"59 30","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131603971","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}
引用次数: 2
Bandpass Filter Inspired Filtering Patch Antenna 带通滤波器启发滤波贴片天线
2021 IEEE MTT-S International Wireless Symposium (IWS) Pub Date : 2021-05-23 DOI: 10.1109/IWS52775.2021.9499515
Shuosheng Ji, Yuandan Dong
{"title":"Bandpass Filter Inspired Filtering Patch Antenna","authors":"Shuosheng Ji, Yuandan Dong","doi":"10.1109/IWS52775.2021.9499515","DOIUrl":"https://doi.org/10.1109/IWS52775.2021.9499515","url":null,"abstract":"A planar filtering patch antenna inspired by BPF (bandpass filter) prototype is proposed in this paper. The antenna has a very simple structure, while realizing multifunctional operation, including directional radiation and filtering functions. The principle of replacing the LC resonator of BPF prototype with a patch resonator is illustrated. The newly obtained prototype is displayed in the physical form of a patch antenna fed by a differential coupled line. A microstrip-to-slotline transition is introduced to generate the differential signal. As a result, the proposed antenna achieves good filtering response with two radiation nulls on the two sides of the passband. The measured results agree well with simulation.","PeriodicalId":260591,"journal":{"name":"2021 IEEE MTT-S International Wireless Symposium (IWS)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121451124","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}
引用次数: 0
Long-range MIMO Communication Using Plane Spiral OAM Mode-group 基于平面螺旋OAM模式群的远程MIMO通信
2021 IEEE MTT-S International Wireless Symposium (IWS) Pub Date : 2021-05-23 DOI: 10.1109/IWS52775.2021.9499584
Xiaowen Xiong, Zelin Zhu, Yuqi Chen, Cheng Ren, Bingchen Pan, Shilie Zheng, W. E. Sha, Xianmin Zhang
{"title":"Long-range MIMO Communication Using Plane Spiral OAM Mode-group","authors":"Xiaowen Xiong, Zelin Zhu, Yuqi Chen, Cheng Ren, Bingchen Pan, Shilie Zheng, W. E. Sha, Xianmin Zhang","doi":"10.1109/IWS52775.2021.9499584","DOIUrl":"https://doi.org/10.1109/IWS52775.2021.9499584","url":null,"abstract":"A communication prototype of plane spiral OAM (PSOAM) mode-group (MG) based multiple-in-multiple-out (MIMO) system is built in a line-of-sight (LoS) scenario. Then, a long-range wireless transmission experiment is conducted at a distance of 30 m (beyond Rayleigh distance). The bit-error-rate (BER) performance proves the feasibility of the proposed system. The obtainable single-way spectrum efficiency is 3.7 bits/s/Hz/stream. MG's vorticity can provide another controllable degree of free (DoF) to reduce the spatial correlation, it's more suitable for the long-range wireless transmission relative to conventional OAM multiplexing technique.","PeriodicalId":260591,"journal":{"name":"2021 IEEE MTT-S International Wireless Symposium (IWS)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116191450","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}
引用次数: 2
A High-Efficiency Two-Stage GaAs HBT Doherty Power Amplifier With Thermal Compensation for WLAN Application 基于热补偿的高效两级GaAs HBT Doherty功率放大器
2021 IEEE MTT-S International Wireless Symposium (IWS) Pub Date : 2021-05-23 DOI: 10.1109/IWS52775.2021.9499563
Shunping Wan, Wen-hua Chen, Bowen Xia, Guansheng Lv, Long Chen, Donghao Li, Zhenghe Feng
{"title":"A High-Efficiency Two-Stage GaAs HBT Doherty Power Amplifier With Thermal Compensation for WLAN Application","authors":"Shunping Wan, Wen-hua Chen, Bowen Xia, Guansheng Lv, Long Chen, Donghao Li, Zhenghe Feng","doi":"10.1109/IWS52775.2021.9499563","DOIUrl":"https://doi.org/10.1109/IWS52775.2021.9499563","url":null,"abstract":"In this paper, a high-efficiency Doherty power amplifier (DPA) using an InGaP/GaAs heterojunction bipolar transistor (HBT) process is presented. The DPA aims for the application of 2.4 GHz wireless local area network (WLAN) systems with a high peak-to-average power ratio (PAPR). The traditional bulky quarter-wavelength line is realized using a low-pass n-type network for miniaturization and low loss. A thermally compensated dynamic bias circuit is applied to increase thermal stability. Under the excitation of a 40-MHz 64-quadratic-amplitude modu-lation(QAM) signal, the proposed DPA achieves a gain of 29 dB gain, an average power of 26 dBm, and an average power added efficiency (PAE) up to 21%. Good error vector magnitude (EVM) and adjacent channel leakage ratio (ACLR) performance are also measured, which demonstrates EVM and ACLR after digital pre-distortion (DPD) are −42 dB and −50.7 dBc. respectively.","PeriodicalId":260591,"journal":{"name":"2021 IEEE MTT-S International Wireless Symposium (IWS)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115002415","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}
引用次数: 4
Design and Optimization of Aperiodic Bragg Reflector-Inspired Filters with Compact Size for High-Power Applications 大功率非周期布拉格反射器启发滤波器的设计与优化
2021 IEEE MTT-S International Wireless Symposium (IWS) Pub Date : 2021-05-23 DOI: 10.1109/IWS52775.2021.9499685
Jiawei Li, Wen-hua Huang, S. Xie, Letian Guo, Tiezhu Liang, G. Deng
{"title":"Design and Optimization of Aperiodic Bragg Reflector-Inspired Filters with Compact Size for High-Power Applications","authors":"Jiawei Li, Wen-hua Huang, S. Xie, Letian Guo, Tiezhu Liang, G. Deng","doi":"10.1109/IWS52775.2021.9499685","DOIUrl":"https://doi.org/10.1109/IWS52775.2021.9499685","url":null,"abstract":"The design and optimization of a high-power filter based on the Bragg reflector is presented in this paper. Theoretical analysis of the aperiodic Bragg reflector reveals that, by replacing the periodic cylindrically symmetric corrugations (CSCs) into random ones, required filtering performance may be realized in a designated frequency band. An improved optimization strategy based on covariance matrix adaptation evolution strategy (CMA-ES) is introduced to optimize CSCs for the filter design. Besides, in order to maximize the power capacity and maintain the designed accuracy, the chamfering technique is presented and integrated into the optimization. An optimized geometry, which respectively exhibit the band-pass response with central frequencies of 9.3GHz and ±100MHz bandwidth, is fabricated and measured. Measured results validate the design and optimization with the required operation band, out-of-band suppression ratio and input power handling capability. The experiment results show that HPM beams are successfully operated at 2GW with pulse width of 105 ns.","PeriodicalId":260591,"journal":{"name":"2021 IEEE MTT-S International Wireless Symposium (IWS)","volume":"485 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115306609","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}
引用次数: 0
Design of Low-Profile End-fire Antenna Based on Interfinger H-type Spoof Surface Plasmon Polaritons 基于指间h型欺骗表面等离子激元的低轮廓端火天线设计
2021 IEEE MTT-S International Wireless Symposium (IWS) Pub Date : 2021-05-23 DOI: 10.1109/IWS52775.2021.9499698
Shi-zhao Tang, Xiangxin Kong, Zhao-yue Jia, Lei Liu
{"title":"Design of Low-Profile End-fire Antenna Based on Interfinger H-type Spoof Surface Plasmon Polaritons","authors":"Shi-zhao Tang, Xiangxin Kong, Zhao-yue Jia, Lei Liu","doi":"10.1109/IWS52775.2021.9499698","DOIUrl":"https://doi.org/10.1109/IWS52775.2021.9499698","url":null,"abstract":"This letter proposes a small-aperture and end-on-fire antenna based on spoof surface plasma polaritons (SSPPs). The antenna consists of a coplanar waveguide (CPW), a transition structure, an interfinger H-type SSPPS transmission line, and a radiating branch. The artificial surface plasmon (SPP) can bind the signal in the groove of the antenna surface, and the structure of the interfinger H -shaped transmission line has stronger field constraint ability, so that the antenna can reduce the loss. Radiant branches radiate energy into free space. The test results show that the return loss of the antenna is less than −10dB in the frequency range of 8.7~11.5 GHz, and the maximum gain can reach 10.8dBi in the frequency range of 10.4GHz.","PeriodicalId":260591,"journal":{"name":"2021 IEEE MTT-S International Wireless Symposium (IWS)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115395409","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}
引用次数: 1
A Ku-band Tunable Absorptive Frequency Selective Reflector ku波段可调谐吸收频率选择反射器
2021 IEEE MTT-S International Wireless Symposium (IWS) Pub Date : 2021-05-23 DOI: 10.1109/IWS52775.2021.9499358
T. Guo, Fang Yuan, Qiang Chen, L. Ding, Yuejun Zheng, Yun-qi Fu
{"title":"A Ku-band Tunable Absorptive Frequency Selective Reflector","authors":"T. Guo, Fang Yuan, Qiang Chen, L. Ding, Yuejun Zheng, Yun-qi Fu","doi":"10.1109/IWS52775.2021.9499358","DOIUrl":"https://doi.org/10.1109/IWS52775.2021.9499358","url":null,"abstract":"In this paper, a Ku-band tunable absorptive frequency selective reflector (TAFSR) is proposed. The TAFSR has a sandwich structure: an active resistive sheet at the top layer, and PEC at the bottom layer, divided by F4B substrate. The resistive sheet layer is composed of a simple straight strip between two metallic strips with PIN diodes loaded to get the tunable reflective coefficient. PIN diodes can be equivalent to serial RL circuit. Two metallic strips and the gap between units is equivalent to serial LC circuit to control the resonant center frequency. The biased strip can be equivalent to the parallel inductance circuit as the electric structure and the biased lines simultaneously. The influence of the PIN diodes' tunable resistance is analyzed through equivalent circuit model. The measurement results show that the −10dB tunable absorptive band of the proposed TAFSR can be achieved in Ku-band from 10.3 GHz to 19.2 GHz.","PeriodicalId":260591,"journal":{"name":"2021 IEEE MTT-S International Wireless Symposium (IWS)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121995062","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}
引用次数: 2
Continuous Scanning Leaky-wave Antenna Based on Spoof Surface Plasmon Polaritons 基于欺骗表面等离子激元的连续扫描漏波天线
2021 IEEE MTT-S International Wireless Symposium (IWS) Pub Date : 2021-05-23 DOI: 10.1109/IWS52775.2021.9499394
Fei Xiong, H. Yin, Jiasong Huang, Leilei Liu
{"title":"Continuous Scanning Leaky-wave Antenna Based on Spoof Surface Plasmon Polaritons","authors":"Fei Xiong, H. Yin, Jiasong Huang, Leilei Liu","doi":"10.1109/IWS52775.2021.9499394","DOIUrl":"https://doi.org/10.1109/IWS52775.2021.9499394","url":null,"abstract":"A continuous scanning leaky-wave antenna (LWA) is proposed using a patch array fed by planar spoof surface plasmon polaritons (SSPP). The LWA is capable of scanning its beam from backward to the forward direction. The −10 dB reflection coefficient bandwidth of the antenna is 6.5 to 10GHz. It is shown that the scanning angle can reach 55 degrees with an average gain level of 9.5 dBi.","PeriodicalId":260591,"journal":{"name":"2021 IEEE MTT-S International Wireless Symposium (IWS)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121661572","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}
引用次数: 0
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