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Journal articles on the topic 'UWB Filter'

Author: Grafiati

Published: 4 June 2021

Last updated: 16 January 2024

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1

Farida, Fitri, and Eko Setijadi. "Perancangan Filter Bandpass dengan Teknik Penggabungan Filter Lowpass dan Highpass." Jurnal Sustainable: Jurnal Hasil Penelitian dan Industri Terapan 7, no. 1 (2018): 32–38. http://dx.doi.org/10.31629/sustainable.v7i1.436.

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UWB technology started to become an attraction in the field of research since the Federal Communications Commission (FCC) allowing this communication is used for commercial communications at a frequency (3.1 GHz - 10.6 GHz). UWB has a very wide frequency range so that in practice there is often interference due to signal interference. Therefore in UWB system filter design is required to maintain UWB device. In telecommunications, filter is a transmission device that has the function to pass the desired frequency. In this paper designed bandpass filter which is applied for UWB technology. The d

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2

Kurra, Lalithendra, Mahesh P. Abegaonkar, Ananjan Basu, and Shiban K. Koul. "A compact uniplanar EBG structure and its application in band-notched UWB filter." International Journal of Microwave and Wireless Technologies 5, no. 4 (2013): 491–98. http://dx.doi.org/10.1017/s1759078713000044.

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In this paper, a new way of obtaining a band rejection in a ultra wideband (UWB) filter using a uniplanar Electromagnetic bandgap (EBG) structure is reported. The EBG structure has a bandgap centered at 6.69 GHz which is almost 38% lower compared with the conventional uniplanar EBG of same dimensions. A one-dimensional EBG structure coupled with a microstrip line provides a narrow bandgap, which is used in obtaining a notch in the UWB filter. Single notch UWB filters with variations in the placement of EBG are fabricated producing a notch centered at 5.19 GHz (wireless local area network (WLAN

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3

Li, Xin, Yan Wang, and Dawei Liu. "Research on Extended Kalman Filter and Particle Filter Combinational Algorithm in UWB and Foot-Mounted IMU Fusion Positioning." Mobile Information Systems 2018 (July 3, 2018): 1–17. http://dx.doi.org/10.1155/2018/1587253.

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As UWB high-precision positioning in NLOS environment has become one of the hot topics in the research of indoor positioning, this paper firstly presents a method for the smoothing of original range data based on the Kalman filter by the analysis of the range error caused by UWB signals in LOS and NLOS environment. Then, it studies a UWB and foot-mounted IMU fusion positioning method with the integration of particle filter with extended Kalman filter. This method adopts EKF algorithm in the kinematic equation of particle filters algorithm to calculate the position of each particle, which is li

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4

Gao, Mingming, Keda Xu, Jingchang Nan, and Li Wang. "Planar Microstrip UWB Bandpass Filter with Quad Notched Bands and High Selectivity." Recent Advances in Electrical & Electronic Engineering (Formerly Recent Patents on Electrical & Electronic Engineering) 14, no. 4 (2021): 493–99. http://dx.doi.org/10.2174/2352096514666210118141959.

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Background: This study aims at solving the problems of large design size and insufficient number of the notched band for traditional ultra-wideband (UWB) filters. A planar compact microstrip UWB bandpass filter (BPF) with quad notched bands and good selectivity is proposed using a modified multiple-mode resonator (MMR) and defected ground structure (DGS). Methods: The MMR consists of a stepped impedance stub above and two pairs of open-circuited stubs on both sides, which can generate the passband and double notched bands of UWB filter, the other two notched bands are obtained by DGS. Results:

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5

Hu, Shanwen, Yunqing Hu, Yiting Gao, et al. "A Compact UWB Bandpass Chip Filter on a GaAs Substrate with Modified Chebyshev Structure." Electronics 9, no. 2 (2020): 313. http://dx.doi.org/10.3390/electronics9020313.

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Ultra-Wideband (UWB) systems are widely used in low-power, high-speed, high-security short-range wireless communication systems throughout digital homes and offices. In the RF front-end of a UWB system, bandpass filters (BPFs) are used to put through the passband signals and reject the stopband signals. Most UWB BPFs are designed with dielectric materials on circuit boards or LTCC technology. In this paper, a very compact fully integrated UWB chip filter is proposed and designed on a GaAs substrate with nitride as dielectric layers to meet the small size requirement of portable devices for nex

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6

Xiao, Jian Kang, Wu Zhu, Yong Li, and Wei Zhao. "Ultra-Wideband (UWB) Bandpass Filter Using Multi-Mode SIR." Advanced Materials Research 760-762 (September 2013): 241–45. http://dx.doi.org/10.4028/www.scientific.net/amr.760-762.241.

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New ultra-wideband (UWB) bandpass filters are proposed by using stepped-impendence resonators (SIRs) and stub-loaded SIRs, aiming at transmitting the signals in the whole UWB passband of 3.1GHz-10.6GHz. Each of the proposed UWB filters consists of two parallel but oppositely arranged compact SIR with tri or quad-section or stub-loaded SIR. In the design, the first two or three resonances of the proposed resonators are properly adjusted to be placed within the UWB. In order to enhance the coupling degree, pairs of quarter-wavelength parallel-coupled lines are longitudinally stretched in both th

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7

Anis, M., and R. Tielert. "Design of UWB pulse radio transceiver using statistical correlation technique in frequency domain." Advances in Radio Science 5 (June 13, 2007): 297–304. http://dx.doi.org/10.5194/ars-5-297-2007.

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Abstract. In this paper, we propose a new technique to extract low power UWB pulse radio signals, near to noise level, using statistical correlation technique in frequency domain. The receiver consists of many narrow bandpass filters which extract energy either from transmitted UWB signal, interfering channels or noise. Transmitted UWB data can be eliminated by statistical correlation of multiple bandpass filter outputs. Super-regenerative oscillators, tuned within UWB spectrum, are designed as bandpass filters. Summers and comparators perform statistical correlation.

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Weng, Min-Hang, Fu-Zhong Zheng, Hong-Zheng Lai, and Shih-Kun Liu. "Compact Ultra-Wideband Bandpass Filters Achieved by Using a Stub-Loaded Stepped Impedance Resonator." Electronics 9, no. 2 (2020): 209. http://dx.doi.org/10.3390/electronics9020209.

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In this paper, we develop a bandpass filter using a stub-loaded stepped impedance resonator (SLSIR) and calculate the even and odd resonant modes of this type of resonator using the input impedance/admittance analysis. In this study, two impedance ratios and two length ratios are operated as the design parameters for controlling the resonant modes of the SLSIR. Several resonant mode variation curves operating three resonant modes with different impedance ratios and two length ratios are developed. By tuning the desired impedance ratios and length ratios of the SLSIRs, compact ultra-wideband (U

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9

Kurita, Daisuke, and Keren Li. "Super UWB bandpass filter." IEICE Electronics Express 4, no. 9 (2007): 300–305. http://dx.doi.org/10.1587/elex.4.300.

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10

Vishwanath*, M., Habibulla Khan, and Himani Goyal Sharma. "Design and Analysis of Step Impedance Resonator Based UWB Band Pass Filter using MIM Waveguide." International Journal of Recent Technology and Engineering (IJRTE) 8, no. 3 (2019): 4319–21. http://dx.doi.org/10.35940/ijrte.c5181.098319.

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In this paper we have designed and analyzed step impedance resonator based ultra wide-band (UWB) band pass filter using plasmonic MIM waveguide. The UWB band pass filter has been designed by introducing a shot-circuited stub to implement the shunt inductance between two quarter wavelength (λ/4) step impedance resonators. There is a strong coupling between the stubs. The plasmonic UWB band pass filter has been designed at E band (1360-nm to1460-nm) optical wavelength. The band width of plasmonic ultra wide-band band pass filter is very effective compared to narrow-band band pass filter. The ref

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11

Uikey, Ramkumar, Ramanand Sagar Sangam, Kakumanu Prasadu, and Rakhesh Singh Kshetrimayum. "Novel Notched UWB Filter Using Stepped Impedance Stub Loaded Microstrip Resonator and Spurlines." International Journal of Microwave Science and Technology 2015 (September 17, 2015): 1–5. http://dx.doi.org/10.1155/2015/939521.

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This paper presents a novel ultrawideband (UWB) bandpass filter using stepped impedance stub loaded microstrip resonator (SISLMR). The proposed resonator is so formed to allow its four resonant frequencies in the UWB passband, which extends from 3.1 GHz to 10.6 GHz. Moreover, two spurline sections are employed to create a sharp notched-band filter for suppressing the signals of 5 GHz WLAN devices. Experimental results of the fabricated filters are in good agreement with the HFSS simulations and validate the design.

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Pan, Wu, Guo Xin Li, Ting Ting Li, and Shu Lin Huang. "Design of the Compact Ultra-Wide-Band Filter Based on Composite Right/Left Handed Transmission Line." Applied Mechanics and Materials 246-247 (December 2012): 728–32. http://dx.doi.org/10.4028/www.scientific.net/amm.246-247.728.

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In this paper, an Ultra-wide-band (UWB) filter based on composite right/left handed transmission line (CRLH TL) is presented. The structure of the proposed band-pass filter is quite simple, of which the size is 0.5cm×1.5cm. Left-handed capacitor is obtained by couple of microstrip lines, and Left-handed inductance is obtained by the grounded stub. The simulated results indicate that the pass band of UWB filter is 3.4-11GHz, the insertion loss is less than 1 dB and the return loss is smaller than -12.5dB. The performance of UWB filter could meet the requirement of UWB communication systems.

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13

Kaddour, Darine, Jean-Daniel Arnould, and Philippe Ferrari. "A semi-lumped microstrip UWB bandpass filter." International Journal of Microwave and Wireless Technologies 1, no. 1 (2009): 57–64. http://dx.doi.org/10.1017/s1759078709000117.

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In this paper, a miniaturized bandpass filter for ultra-wide-band applications is proposed. It is based on the embedding of high-pass structures in a low-pass filter. A semi-lumped technology combining surface-mounted capacitors and transmission lines has been used. The filter design rules have been carried out. Furthermore, two filters having a 3-dB fractional bandwidth of 142 and 150%, centered at 0.77 and 1 GHz, respectively, have been realized for a proof of concept. Measured characteristics, in good agreement with simulations, show attractive properties of return loss (|S11| <−18 dB),

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14

Karimi, Gholamreza, Farnaz Khamin-Hamedani, and Hesam Siahkamari. "Compact UWB BPF using slotted resonator with an independently controllable notched band." International Journal of Microwave and Wireless Technologies 8, no. 1 (2014): 25–31. http://dx.doi.org/10.1017/s1759078714001251.

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In this paper, a novel compact ultra-wideband (UWB) bandpass filter (BPF) without and with one sharply notched band is presented. The UWB bandpass characteristic is achieved using slotted resonators (SR) and a notch is obtained by spiral defected ground structure (SDGS) without any change in SR structure. Center frequency of the notched band can be easily changed (from 5 to 9 GHz) by tuning the dimensions of SDGS. To verify the feasibility of the proposed filter, two UWB BPFs, one without the notched band and the other with a notched band, at 8.0 GHz are developed and fabricated, there by supp

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El Omari El Bakali, H., H. Elftouh, A. Farkhsi, A. Zakriti, and M. El Ouahabi. "Design of a Super Compact UWB Filter Based on Hybrid Technique with a Notch Band Using Open Circuited Stubs." Advanced Electromagnetics 9, no. 3 (2020): 39–46. http://dx.doi.org/10.7716/aem.v9i3.1521.

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This paper presents a new design of a super compact Ultra wideband (UWB) band-pass filter (BPF) with rejection of X-band satellite applications. For covering the UWB bandpass, the proposed filter is realized using hybrid technique which is achieved by using a Microstrip-Coplanar waveguide-Microstrip transition. The basic structure consists of a modified microstrip in the top layer and CPW in the bottom layer. Later, open-circuited stubs are embedded in the top to implement in-band transmission zeros (TZ) so as to circumvent interference. The simulated results show that the UWB bandpass filter

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16

Xiao, Bing Gang, Peng Ye, Zhi Yi Xie, and Han Liu. "Design of Ultra-Wideband Bandpass Filter Based on Composite Right/Left Handed Transmission Line." Advanced Materials Research 460 (February 2012): 66–69. http://dx.doi.org/10.4028/www.scientific.net/amr.460.66.

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As one of the most important devices in the ultra-wideband (UWB) wireless communication system, UWB filter has received more and more attention with the rapid development of UWB wireless communication technology. In this paper, an ultra-wideband bandpass filter based on composite right/left handed transmission line (CRLH TL) is designed. The filter are simulated and optimized by the industry-standard simulation tool HFSS to examine the correctness and effectiveness of the design with the simulated scattering parameters S11 and S21.

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17

Ahmed, Sharif, Tan Kim Geok, Mohamad Yusoff Alias, et al. "A UWB Antenna Array Integrated with Multimode Resonator Bandpass Filter." Electronics 10, no. 5 (2021): 607. http://dx.doi.org/10.3390/electronics10050607.

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This paper presents a novel design of a modified ultrawideband (UWB) antenna array integrated with a multimode resonator bandpass filter. First, a single UWB antenna is modified and studied, using a P-shape radiated patch instead of a full elliptical patch, for wide impedance bandwidth and high realized gain. Then, a two-element UWB antenna array is developed based on this modified UWB antenna with an inter-element spacing of 0.35 λL, in which λL is the free space wavelength at the lower UWB band edge of 3.1 GHz, compared to 0.27 λL of a reference UWB antenna array designed using a traditional

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18

Kumar, Harish, and MD Upadhayay. "Design of UWB Filter with WLAN Notch." International Journal of Antennas and Propagation 2012 (2012): 1–4. http://dx.doi.org/10.1155/2012/971097.

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UWB technology- (operating in broad frequency range of 3.1–10.6 GHz) based filter with WLAN notch has shown great achievement for high-speed wireless communications. To satisfy the UWB system requirements, a band pass filter with a broad pass band width, low insertion loss, and high stop-band suppression are needed. UWB filter with wireless local area network (WLAN) notch at 5.6 GHz and 3 dB fractional bandwidth of 109.5% using a microstrip structure is presented. Initially a two-transmission-pole UWB band pass filter in the frequency range 3.1–10.6 GHz is achieved by designing a parallel-coup

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Karimi, Gholamreza, Fatemeh Javidan, and Amir Hossein Salehi. "A compact UWB band-pass filter with a notch band using multi-mode stub-loaded resonators (MM-SLR)." International Journal of Microwave and Wireless Technologies 10, no. 2 (2018): 227–33. http://dx.doi.org/10.1017/s1759078718000041.

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AbstractIn this paper, an ultra-wideband (UWB) band-pass filter (BPF) with a sharp notch band is presented. The UWB BPF consists of modified elliptical-ring and multi-mode stub-loaded resonator (MM-SLR). By adding the asymmetric tight coupled lines resonator via input/output (I/O) lines, it can be achieved UWB band-pass response. With adding two bends to the middle resonator, a notch band at 6.86 GHz is created, so that it can be controlled using the mathematical formulas (MF). In the meantime, the equivalent circuit of the middle resonator is obtained using L–C analysis. Measured results of f

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Srivastava, Saurabh, and O. P. Sahu. "Filter Bank Based Notch Filter for Interference Cancellation in UWB Systems." International Journal of Advance Research and Innovation 2, no. 2 (2014): 85–95. http://dx.doi.org/10.51976/ijari.221413.

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The primary concern of any communication engineer is the bandwidth of the transmitted or received signal and the noise encountered during the transmission reception process. We analyze the effects of narrowband interference in Multicarrier UWB systems such as short distance IEEE 802.11a system. It is known that the process of narrowband interference cancellation is quite complex especially for ultra-wideband systems due to their power spectral density as low as -41dBm/MHz recommendations by the FCC. We review the model for narrow band interference and use the statistical property of correlatio

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Aseeri, Mohammed A., Meshaal A. Alyahya, Hatim A. Bukhari, and Hussein N. Shaman. "Compact Microstrip Lowpass Filter with Low Insertion Loss for UWB Medical Applications." Wireless Communications and Mobile Computing 2018 (June 6, 2018): 1–5. http://dx.doi.org/10.1155/2018/8430626.

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A microstrip lowpass filter based on transmission line elements for UWB medical applications is proposed in this paper. The filter is constructed of two symmetric shunt open-circuited stubs and three series unit elements. The filter is designed to exhibit an elliptic function response with equal ripple in the passband and the rejection band. A prototype is successfully designed, fabricated, and measured, where a good agreement is attained. The filter shows a high filtering selectivity and an ultra-wide stopband up to 20 GHz with an attenuation level of more than 20-dB. The filter is compact an

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Bitra, S. K., and S. Miriyala. "An Ultra-Wideband Band Pass Filter using Metal Insulator Metal Waveguide for Nanoscale Applications." Engineering, Technology & Applied Science Research 11, no. 3 (2021): 7247–50. http://dx.doi.org/10.48084/etasr.4194.

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A T-stub Square Ring Resonator (SRR) based Ultra-Wide Band (UWB) Band Pass Filter (BPF) is studied and investigated in this paper. The proposed filter is based on coupled feed line connected to the T-stub SRR. Ultra-wideband characteristics can be realized by adjusting the T-stub lengths and coupling the gaps between both sides of waveguides and SRR. The characteristics of the T-stub SRR show that the miniaturized UWB BPF can be operated at THz frequencies. The proposed UWB filter is simulated and analyzed using the Finite Differential Time Domain (FDTD) solver-based Computer Simulation Techno

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Zeng, Qingxi, Dehui Liu, and Chade Lv. "UWB/Binocular VO Fusion Algorithm Based on Adaptive Kalman Filter." Sensors 19, no. 18 (2019): 4044. http://dx.doi.org/10.3390/s19184044.

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Among the existing wireless indoor positioning systems, UWB (ultra-wideband) is one of the most promising solutions. However, the single UWB positioning system is affected by factors such as non-line of sight and multipath, and the navigation accuracy will decrease. In order to make up for the shortcomings of a single UWB positioning system, this paper proposes a scheme based on binocular VO (visual odometer) and UWB sensor fusion. In this paper, the original distance measurement data of UWB and the position information of binocular VO are merged by adaptive Kalman filter, and the structural d

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Shi, Yutong, Yongbo Zhang, Zhonghan Li, Shangwu Yuan, and Shihao Zhu. "IMU/UWB Fusion Method Using a Complementary Filter and a Kalman Filter for Hybrid Upper Limb Motion Estimation." Sensors 23, no. 15 (2023): 6700. http://dx.doi.org/10.3390/s23156700.

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Motion capture systems have enormously benefited the research into human–computer interaction in the aerospace field. Given the high cost and susceptibility to lighting conditions of optical motion capture systems, as well as considering the drift in IMU sensors, this paper utilizes a fusion approach with low-cost wearable sensors for hybrid upper limb motion tracking. We propose a novel algorithm that combines the fourth-order Runge–Kutta (RK4) Madgwick complementary orientation filter and the Kalman filter for motion estimation through the data fusion of an inertial measurement unit (IMU) an

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Jia, Liangsheng, Yinchu Wang, Li Ma, Zhi He, Zixu Li, and Yongjie Cui. "Integrated Positioning System of Kiwifruit Orchard Mobile Robot Based on UWB/LiDAR/ODOM." Sensors 23, no. 17 (2023): 7570. http://dx.doi.org/10.3390/s23177570.

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To address the issue of low positioning accuracy of mobile robots in trellis kiwifruit orchards with weak signal environments, this study investigated an outdoor integrated positioning method based on ultra-wideband (UWB), light detection and ranging (LiDAR), and odometry (ODOM). Firstly, a dynamic error correction strategy using the Kalman filter (KF) was proposed to enhance the dynamic positioning accuracy of UWB. Secondly, the particle filter algorithm (PF) was employed to fuse UWB/ODOM/LiDAR measurements, resulting in an extended Kalman filter (EKF) measurement value. Meanwhile, the odomet

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Gopalakrishnan, Ramakrishnan, Sivakumar Rajagopal, Sai Viswanth Reddy, and Anirudh E. R. "Identification of Most Suitable Dielectrics Substrate for UWB Bandpass Filter." ECS Transactions 107, no. 1 (2022): 431–38. http://dx.doi.org/10.1149/10701.0431ecst.

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Identification of a suitable substrate is a critical parameter in the design of microstrip bandpass filters. In this work, the performance of an Ultra Wideband (UWB) bandpass filter based on Electromagnetic Bandgap (EBG) resonators are designed, fabricated, and analyzed. Printed Circuit Board (PCB) with suitable dielectric substrates are used extensively to develop microstrip lines. The filter is fabricated using RT Duroid substrate material and compared with FR4 and Alumina dielectric substrates and the performance results show that the best result is obtained with RT Duroid.

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KURITA, D., and K. LI. "Notch-Band Implemented UWB Bandpass Filter." IEICE Transactions on Electronics E90-C, no. 12 (2007): 2226–31. http://dx.doi.org/10.1093/ietele/e90-c.12.2226.

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Jamsai, Meechai, Niwat Angkawisittpan, and Adisorn Nuan-On. "Design of a Compact Ultra-Wideband Bandpass Filter Using Inductively Compensated Parallel-Coupled Lines." Electronics 10, no. 21 (2021): 2575. http://dx.doi.org/10.3390/electronics10212575.

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An ultra-wideband bandpass filter (UWB-BPF) using inductively compensated parallel-coupled lines (ICPCL) is presented in this article. It consists of three circuits: a high-pass filter (HPF), a lowpass filter (LPF), and a transmission line. The HPF and the LPF are independently synthesized from the ICPCL. The proposed filter can suppress unwanted frequencies in the upper stopband and increase the skirt slope of the frequency response in the transition bands. The fabricated UWB-BPF with compact size provides good passband performances, with insertion loss of better than −0.49 dB and return loss

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Zhang, Li, Hao Zhang, Xue Rong Cui, and T. Aaron Gulliver. "Ultra Wideband Indoor Positioning Using Kalman Filters." Advanced Materials Research 433-440 (January 2012): 4207–13. http://dx.doi.org/10.4028/www.scientific.net/amr.433-440.4207.

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A time-difference-of-arrival (TDOA) positioning technique for indoor ultra wideband (UWB) systems is presented. Non-line-of-sight (NLOS) propagation error is a major source of error in positioning systems. Therefore an NLOS mitigation technique employing a Kalman filter is utilized to reduce the NLOS errors in indoor UWB environments. An extended Kalman filter (EKF) is used to process the TDOA data for mobile positioning and tracking. Performance results are presented which show that the proposed scheme can significantly improve the positioning accuracy in a UWB environment.

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Guan, Xuehui, Ping Gui, Tao Xiong, Baoping Ren, and Lei Zhu. "Hybrid Microstrip/Slotline Ultra-Wideband Bandpass Filter with a Controllable Notch Band." International Journal of Antennas and Propagation 2017 (2017): 1–7. http://dx.doi.org/10.1155/2017/2398610.

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An ultra-wideband (UWB) bandpass filter (BPF) with a controllable notch band is presented by using hybrid microstrip/slotline structure. Firstly, a slotline resonator with symmetrically loaded stubs is fed by two microstrip lines to produce a UWB bandpass filtering response. Secondly, a microstrip triangular loop resonator is externally loaded over the slotline, and a notch band is introduced in the UWB passband. The notch band is determined by the perimeter of the loop resonator. Thirdly, two patches are added as the perturbation element to the corners of the microstrip resonator to excite a

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Yuan, Chuanqian, Jun Liu, and Ye Wang. "Research on indoor positioning and navigation method of AGV based on multi-sensor fusion." Highlights in Science, Engineering and Technology 7 (August 3, 2022): 206–13. http://dx.doi.org/10.54097/hset.v7i.1060.

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In comparison with current AGV indoor positioning and navigation methods, the combination of IMU+2D LiDAR is prone to signal loss and cumulative error in indoor, so we propose an AGV indoor navigation and positioning method with multi-sensor fusion of odometer, IMU, LiDAR, and UWB. The model is based on the traceless Kalman filter fusion algorithm, and the UWB positioning provides accurate initial coordinates for the traceless Kalman filter. To verify the feasibility of the method, simulations and experiments are done on MatlabR2020a and experimental platform. The results show that the UWB loc

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Gao, Zhouzheng, Lin Chen, Yu Min, Jie Lv, and You Li. "Evaluation on Nonholonomic Constraints and Rauch–Tung–Striebel Filter-Enhanced UWB/INS Integration." Mathematical Problems in Engineering 2020 (October 13, 2020): 1–14. http://dx.doi.org/10.1155/2020/7274181.

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Precise and seamless positioning is becoming a basic requirement for the Internet of Things (IoT). However, there is a gap for precise positioning in Global Navigation Satellite System- (GNSS-) denied indoor areas. Thus, a multisensor integration system based on ultrawide-band (UWB), inertial navigation system (INS), nonholonomic constraints (NHCs), and Rauch–Tung–Striebel (RTS) smoother is proposed. In this system, the UWB performs as the major precise positioning system, while the INS bridges the UWB-degraded and UWB-denied periods. Meanwhile, the NHC restrains the drifts of INS, while the R

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Bi, Shuhui, Liyao Ma, Tao Shen, Yuan Xu, and Fukun Li. "Neural network assisted Kalman filter for INS/UWB integrated seamless quadrotor localization." PeerJ Computer Science 7 (July 14, 2021): e630. http://dx.doi.org/10.7717/peerj-cs.630.

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Due to some harsh indoor environments, the signal of the ultra wide band (UWB) may be lost, which makes the data fusion filter can not work. For overcoming this problem, the neural network (NN) assisted Kalman filter (KF) for fusing the UWB and the inertial navigation system (INS) data seamlessly is present in this work. In this approach, when the UWB data is available, both the UWB and the INS are able to provide the position information of the quadrotor, and thus, the KF is used to provide the localization information by the fusion of position difference between the INS and the UWB, meanwhil

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Saiful Bahri, I. D., Z. Zakaria, N. A. Shairi, and N. Edward. "A novel UWB reconfigurable filtering antenna design with triple band-notched characteristics by using u-shaped coppers." Indonesian Journal of Electrical Engineering and Computer Science 14, no. 1 (2019): 267. http://dx.doi.org/10.11591/ijeecs.v14.i1.pp267-275.

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<span>This paper proposed an UWB antenna with triple reconfigurable notch filters. By presenting there U-shaped coppers in the design, the potential triple interference in UWB applications can be rejected. Six PIN diodes are putted on the coppers to represent the OFF and ON tunable status in order to add reconfigurable characteristics to the UWB antenna. By using this ON and OFF tunable method, the current distribution of the proposed design changes and enables the antenna to have eight operation modes. The results prove that the proposed design can operate over the entire UWB frequency

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Pittet, Sylvain, Valérie Renaudin, Bertrand Merminod, and Michel Kasser. "UWB and MEMS Based Indoor Navigation." Journal of Navigation 61, no. 3 (2008): 369–84. http://dx.doi.org/10.1017/s0373463308004797.

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Thanks to its physical characteristics, Ultra-wideband (UWB) is one of the most promising technologies for indoor pedestrian navigation. UWB radio localisation systems however experience multipath phenomena that decrease the precision and the reliability of the user's location. To cope with complex indoor environments, UWB radio signals are coupled with inertial measurements from Micro Electro Mechanical Sensors (MEMS) in an extended Kalman filter. Improved performances of the filter are presented and compared with reference trajectories and with pure inertial solutions. Only specific selectio

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Zhao, Mujie, Tao Zhang, and Di Wang. "A high precision indoor positioning method based on UKF." Journal of Intelligent & Fuzzy Systems 42, no. 4 (2022): 3639–52. http://dx.doi.org/10.3233/jifs-211810.

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Aiming at the nonlinear filter problem in Ultra Wide Band (UWB) navigation and position, a high-order Unscented Kalman Filter (UKF) position method is proposed. On the one hand, the position and velocity are used as state variables to establish a nonlinear filtering model based on UWB position system. On the other hand, based on the fifth order cubature transform (CT), the analytical solution of the high-order unscented Kalman filter is obtained by introducing a free parameter δ. To verify the effectiveness of the proposed method, the Time of Arrival (TOA) location method, the least square met

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Liu, Li, Wang, and Zhang. "An Adaptive UWB/MEMS-IMU Complementary Kalman Filter for Indoor Location in NLOS Environment." Remote Sensing 11, no. 22 (2019): 2628. http://dx.doi.org/10.3390/rs11222628.

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High precision positioning of UWB (ultra-wideband) in NLOS (non-line-of-sight) environment is one of the hot issues in the direction of indoor positioning. In this paper, a method of using a complementary Kalman filter (CKF) to fuse and filter UWB and IMU (inertial measurement unit) data and track the errors of variables such as position, speed, and direction is presented. Based on the uncertainty of magnetometer and acceleration, the noise covariance matrix of magnetometer and accelerometer is calculated dynamically, and then the weight of magnetometer data is set adaptively to correct the di

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Shome, Partha P., Taimoor Khan, Shiban K. Koul, and Yahia M. M. Antar. "Two Decades of UWB Filter Technology: Advances and Emerging Challenges in the Design of UWB Bandpass Filters." IEEE Microwave Magazine 22, no. 8 (2021): 32–51. http://dx.doi.org/10.1109/mmm.2021.3078040.

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Pu, Yuxiang, Xiaolong Li, Yunqing Liu, et al. "Improved Strong Tracking Cubature Kalman Filter for UWB Positioning." Sensors 23, no. 17 (2023): 7463. http://dx.doi.org/10.3390/s23177463.

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For the problems of Non-Line-of-Sight (NLOS) observation errors and inaccurate predictive dynamics model in wireless ultra-wideband (UWB) positioning systems, an improved strong tracking cubature Kalman filter (ISTCKF) positioning algorithm is proposed in this paper. The main idea of the algorithm is as follows. First, the observations are reconstructed based on the weighted positioning results obtained from the predictive dynamics model and the least squares algorithm. Second, the difference in statistical properties between the observation noise and the NLOS errors is utilized to identify th

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Dastkhosh, Amir Reza, Gholamreza Dadashzadeh, and Mohammad Hossein Sedaaghi. "New Design Method of UWB Microstrip Filters Using Adaptive Genetic Algorithms with Defected Ground Structures." International Journal of Microwave Science and Technology 2010 (May 12, 2010): 1–9. http://dx.doi.org/10.1155/2010/671515.

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The effects of adaptive genetic algorithms (AGAs) and defected ground structures (DGSs) on performance optimization of tapered microstrip filter are investigated. The proposed structure achieves an ultra wide stopband with high attenuation within a small surface area, as well as 45% smaller size, in comparison with conventional filters. The parameters of the filter are optimized using in-home AGA code. In the proposed AGA algorithm, the crossover and mutation probabilities are adaptively changed according to the value of individual fitness. Then by utilizing the proposed DGS, a compact S-band

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Long, Lin, and Jiaye Wu. "Research on Indoor Fusion Positioning Based on EKF for Uwb_Imu." Academic Journal of Science and Technology 8, no. 1 (2023): 156–60. http://dx.doi.org/10.54097/ajst.v8i1.14153.

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The study aims to improve the accuracy and stability of indoor positioning by integrating information from two types of sensors: UWB (Ultra-Wideband) and IMU (Inertial Measurement Unit) calibrated to eliminate system errors. The fusion algorithm utilizes Extended Kalman Filter (EKF) to combine UWB data and IMU measurements. First, the IMU undergoes self-calibration to correct system errors. Then, UWB ranging technology is used to estimate the target's position, and the information from the IMU's gyroscope and accelerometer is used to update the kinematic model. Finally, the EKF filters and pre

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Jhariya, Dharmendra Kumar, Akhilesh Mohan, and Manoranjan Sinha. "Design of two-stage fish spear-shaped UWB bandpass filter with sharp selectivity and good out-of-band performances." International Journal of Microwave and Wireless Technologies 9, no. 9 (2017): 1821–26. http://dx.doi.org/10.1017/s1759078717000794.

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In this paper, a novel two-stage fish spear-shaped multimode resonator (MMR)-based ultra wideband (UWB) bandpass filter (BPF) is presented. The fish spear-shaped MMR is loaded with stepped impedance resonator in order to improve the out-of-band performance of the proposed filter. The proposed UWB BPF filter has fractional bandwidth better than 110%. In order to validate the present design approach, the filter is fabricated on RT/Duroid 5880 having dielectric constant 2.2, thickness 0.787 mm and loss tangent of 0.0009. The measured passband bandwidth of the filter is from 3.3 to 11.85 GHz, with

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Kondapalli, Soumya, Arjuna Madanayake, and Len Bruton. "Digital Architectures for UWB Beamforming Using 2D IIR Spatio-Temporal Frequency-Planar Filters." International Journal of Antennas and Propagation 2012 (2012): 1–19. http://dx.doi.org/10.1155/2012/234263.

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A design method and an FPGA-based prototype implementation of massively parallel systolic-array VLSI architectures for 2nd-order and 3rd-order frequency-planar beam plane-wave filters are proposed. Frequency-planar beamforming enables highly-directional UWB RF beams at low computational complexity compared to digital phased-array feed techniques. The array factors of the proposed realizations are simulated and both high-directional selectivity and UWB performance are demonstrated. The proposed architectures operate using 2's complement finite precision digital arithmetic. The real-time through

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Peng, Huaxia, Yufeng Luo, and Junding Zhao. "COMPACT MICROSTRIP UWB BANDPASS FILTER WITH TWO BAND-NOTCHES FOR UWB APPLICATIONS." Progress In Electromagnetics Research Letters 45 (2014): 25–30. http://dx.doi.org/10.2528/pierl14011504.

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Xiao, Bing Gang, Peng Ye, and Zhi Yi Xie. "A Novel Ring Slot Resonator UWB Bandpass Filter with Two Notch-Bands." Advanced Materials Research 460 (February 2012): 62–65. http://dx.doi.org/10.4028/www.scientific.net/amr.460.62.

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A novel ultra-wideband(UWB) bandpass filter with dual notch-bands and wide stop-band is proposed. The designed UWB BPF is cascading a coupled simplified composite right-left-handed (SCRLH) resonator and a ring slot resonator (RSR). The SCRLH resonator creates two different notch-bands. And the RSR unit suppresses the higher-order harmonics at the upper stop-band. The UWB BPF demonstrated good insertion/return losses and out-of-band rejections in simulation.

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Liao, Z., Z. Zheng, and Y. Li. "IMPLEMENTATION AND IMPROVEMENT OF INDOOR WEARABLE UWB/INS INTEGRATION POSITIONING METHOD." International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLVI-3/W1-2022 (April 22, 2022): 111–17. http://dx.doi.org/10.5194/isprs-archives-xlvi-3-w1-2022-111-2022.

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Abstract. Aiming at the problem that the Ultra-Wide-Band (UWB) positioning accuracy is reduced in the Non-Line-of-Sight (NLOS) environment, a UWB positioning accuracy evaluation mechanism is introduced. This paper analyzes the geometric distribution of UWB equipment theoretically to evaluate the positioning accuracy of the UWB system. Furthermore, it optimizes the geometric distribution of UWB and optimizes the UWB positioning algorithm model to improve the positioning accuracy. A set of UWB positioning accuracy estimation process is proposed. Through theoretical analysis and simulation, a mod

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Kurita, Daisuke, and Keren Li. "Two-layered ultra-wideband (UWB) bandpass filter." IEICE Electronics Express 5, no. 8 (2008): 291–95. http://dx.doi.org/10.1587/elex.5.291.

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Wei, Feng, Lei Chen, Xiao-Wei Shi, Xin Huai Wang, and Qiulin Huang. "COMPACT UWB BANDPASS FILTER WITH NOTCHED BAND." Progress In Electromagnetics Research C 4 (2008): 121–28. http://dx.doi.org/10.2528/pierc08060104.

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Rabbi, K., and D. Budimir. "Highly Selective Reconfigurable Filter for UWB Systems." IEEE Microwave and Wireless Components Letters 24, no. 3 (2014): 146–48. http://dx.doi.org/10.1109/lmwc.2013.2291857.

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Bindu, C. J., Anju Pradeep, S. Mridula, and P. Mohanan. "Compact planar UWB filter using cascaded resonators." International Journal of Ultra Wideband Communications and Systems 3, no. 2 (2015): 75. http://dx.doi.org/10.1504/ijuwbcs.2015.077101.

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