VNU-UET Repository: No conditions. Results ordered -Date Deposited. 2024-03-28T19:39:24ZEPrintshttp://eprints.uet.vnu.edu.vn/images/sitelogo.pnghttps://eprints.uet.vnu.edu.vn/eprints/2021-06-11T09:46:11Z2021-06-11T09:46:11Zhttp://eprints.uet.vnu.edu.vn/eprints/id/eprint/4452This item is in the repository with the URL: http://eprints.uet.vnu.edu.vn/eprints/id/eprint/44522021-06-11T09:46:11ZNetwork Coding with Multimedia Transmission and Cognitive Networking: An Implementation based on Software-Defined RadioNetwork coding (NC) is considered a breakthrough to improve throughput, robustness, and security of wireless networks. Although the theoretical aspects of NC have been extensively investigated, there have been only few experiments with pure NC schematics. This paper presents an implementation of NC under a two-way relay model and extends it to two non-straightforward scenarios: (i) multimedia transmission with layered coding and multiple-description coding, and (ii) cognitive radio with Vandermonde frequency division multiplexing (VFDM). The implementation is in real time and based on software-defined radio (SDR). The experimental results show that, by combining NC and source coding, we can control the quality of the received multimedia content in an on-demand manner. Whereas in the VFDM-based cognitive radio, the quality of the received content in the primary receiver is low (due to imperfect channel estimation) yet retrievable. Our implementation results serve as a proof for the practicability of network coding in relevant applications.Thi Thuy Quynh Tranquynhttt@vnu.edu.vnKhac Hoang NgoVan Ly NguyenLinh Trung Nguyenlinhtrung@vnu.edu.vnQuoc Tuan Nguyentuannq@vnu.edu.vnEjder BastugAzarian SylvainVu Ha Lehalv@vnu.edu.vnNguyen Quoc Bao VoXuan Nam Trannamtx@mta.edu.vnDebbah MerouanePierre Duhamelpierre.duhamel@lss.supelec.fr2020-12-20T14:59:33Z2020-12-20T14:59:33Zhttp://eprints.uet.vnu.edu.vn/eprints/id/eprint/4287This item is in the repository with the URL: http://eprints.uet.vnu.edu.vn/eprints/id/eprint/42872020-12-20T14:59:33ZDilated residual convolutional neural networks for low-dose CT image denoisingThanh Trung Nguyentrungntktmt@gmail.comDinh Hoan Trinhhoantd@gmail.comLinh Trung Nguyenlinhtrung@vnu.edu.vnThi Thuy Quynh Tranquynhttt@vnu.edu.vnManh Ha Luuhalm@vnu.edu.vn2020-12-13T16:04:40Z2020-12-13T16:04:40Zhttp://eprints.uet.vnu.edu.vn/eprints/id/eprint/4262This item is in the repository with the URL: http://eprints.uet.vnu.edu.vn/eprints/id/eprint/42622020-12-13T16:04:40ZThiết kế bộ khuếch đại công suất cao tần hiệu suất cao trên công nghệ CMOS 65nm cho các ứng dụng IoT tốc độ caoDuc Manh Tranducmanh.m18@gmail.comDuy Hieu Buihieubd@vnu.edu.vnThi Thuy Quynh Tranquynhttt@vnu.edu.vnVan Thanh Vu Levulvt@husc.edu.vnXuan Tu Trantutx@vnu.edu.vn2019-12-24T04:38:14Z2019-12-24T04:38:35Zhttp://eprints.uet.vnu.edu.vn/eprints/id/eprint/3835This item is in the repository with the URL: http://eprints.uet.vnu.edu.vn/eprints/id/eprint/38352019-12-24T04:38:14ZKhai thác dữliệu người dùng đóng góp giúp nâng cao hiệu quảthực thi phần mềmĐối với các phần mềm và ứng dụng, việc thu thập dữliệu từngười dùngcàng nhiều sẽcàng góp phần cải thiện hiệu quảhoạt động của phần mềm và ứng dụng đó. Một ví dụnhư việc những người dùngGoogle Map trảlời các câu hỏi hoặc cung cấp ảnh liên quan tới một địa điểm nào đó (thư viện, trường học, nhà hàng, bệnh viện,..) sẽgiúp nâng cao trải nghiệm của những người dùng tiếp theo. Bài báo này đi sâu vào việc cách thức người dùng có thểđóng góp vào việc nâng cao hiệu quảhoạt động của ứng dụng/phần mềm bằng cách cung cấp dữliệu một cách tựđộng hay thủcông trong quá trình sửdụng ứng dụng / phần mềm đó. Một sốứng dụng liên quan sẽđược phân tích và làm rõ vai trò cung cấp dữliệu của người dùng.Thi Hien Nguyenhiennt_tv@vnu.edu.vnThi Thu NguyenThi Thuy Quynh Tranquynhttt@vnu.edu.vnDuc Tan Trantantd@vnu.edu.vn2019-12-24T04:37:55Z2019-12-24T04:37:55Zhttp://eprints.uet.vnu.edu.vn/eprints/id/eprint/3830This item is in the repository with the URL: http://eprints.uet.vnu.edu.vn/eprints/id/eprint/38302019-12-24T04:37:55ZNetwork Coding and Information Security
in Industry 4.0This work focuses on demonstrating of operation of 3-
node, 4-node, and 5-node network coding models
based on Software Define Radio implementation with
BladeRF kit. The improvement of information security
for network coding is continuously investigated in next
phase.Thi Thuy Quynh Tranquynhttt@vnu.edu.vnVan Ly NguyenKhac Hoang NgoQuoc Tuan Nguyentuannq@vnu.edu.vnBustug EAzarian SDebbah MerouanDuhamel P2019-12-24T04:36:55Z2020-01-04T14:42:43Zhttp://eprints.uet.vnu.edu.vn/eprints/id/eprint/3834This item is in the repository with the URL: http://eprints.uet.vnu.edu.vn/eprints/id/eprint/38342019-12-24T04:36:55ZEEG Source Localization: A New Multiway Temporal - Spatial Spectral AnalysisAccurate localization of epileptogenic zone is highly
meaningful for epilepsy diagnosis and treatment in general
and removal of the epileptogenic region in epilepsy surgery
in particular. In this paper, we present a robust method for
electroencephalography (EEG) source localization based on a new
multiway temporal–spatial–spectral (TSS) analysis for epileptic
spikes via graph signal processing and multiway blind source
separation. Instead of using the temporal behavior of the EEG
distributed sources, we first apply the graph wavelet transform
to the spatial variable for epilepsy tensor construction in order
to exploit latent information of the spatial domain. We then
apply the tensorial multiway blind source separation method
for estimating the sources and hence localizing them. Numerical
experiments on both synthetic and real data are carried out to
evaluate the effectiveness of the TSS analysis and to compare it
with two state-of-the-art types of analysis: space–time–frequency
(STF) and space–time–wave–vector (STWV). Experimental results
show that the proposed method is promising for epileptic
source estimation and localization.Thanh Xuyen Lexuyen.lethanh@hust.edu.vnTrung Thanh Leletrungthanhtbt@gmail.comLinh Trung Nguyenlinhtrung@vnu.edu.vnThi Thuy Quynh Tranquynhttt@vnu.edu.vnDuc Thuan Nguyenthuan.nguyenduc@hust.edu.vn2019-12-19T03:19:22Z2019-12-20T04:49:40Zhttp://eprints.uet.vnu.edu.vn/eprints/id/eprint/3804This item is in the repository with the URL: http://eprints.uet.vnu.edu.vn/eprints/id/eprint/38042019-12-19T03:19:22ZNetwork Coding with Multimedia Transmission: A Software-Defined-Radio based ImplementationRecently, network coding (NC) has been
considered as a breakthrough to improve throughput,
robustness, and security of wireless network. Although
there have been many theoretical studies on performance
of NCs, there have been few experiments with pure NC
schematics. This paper presents the first implementation of
NC with multiple media transmission, which uses layered
coding. The implementation is real-time and based on
Software Define Radio (SDR) technique. The experimental
results show that, by combining NC and source coding,
we can control quality of received images on demand.Thi Thuy Quynh Tranquynhttt@vnu.edu.vnViet Khoa Tranvietkhoa86@gmail.comVan Ly Nguyenlynguyenvan.uet@gmail.comLinh Trung Nguyenlinhtrung@vnu.edu.vn2019-12-04T07:18:12Z2019-12-04T07:18:12Zhttp://eprints.uet.vnu.edu.vn/eprints/id/eprint/3700This item is in the repository with the URL: http://eprints.uet.vnu.edu.vn/eprints/id/eprint/37002019-12-04T07:18:12ZEEG tensor representation using graph signal processingTo help analyze electroencephalography (EEG) data for epilepsy, we propose a temporal–spatial–spectral tensor tensor representation for epileptic spikes via graph signal processing. Instead of using the temporal behavior of the sources, we apply the graph wavelet transform to the spatial variable for constructing the new representation of the epilepsy tensor, in order to exploit latent information of the spatial domain. To illustrate the usefulness of the proposed method for EEG tensor representation, we decompose this tensor to separate EEG sources. Simulation results on real EEG data of a patient diagnosed of epilepsy indicated that our proposed method of representation is promising in estimating the epileptic sources.Thanh Xuyen Lexuyen.lethanh@hust.edu.vnTrung Thanh Leletrungthanhtbt@gmail.comLinh Trung Nguyenlinhtrung@vnu.edu.vnThi Thuy Quynh Tranquynhttt@vnu.edu.vnDuc Thuan Nguyenthuan.nguyenduc@hust.edu.vn2019-09-03T07:27:47Z2019-09-03T07:27:47Zhttp://eprints.uet.vnu.edu.vn/eprints/id/eprint/3553This item is in the repository with the URL: http://eprints.uet.vnu.edu.vn/eprints/id/eprint/35532019-09-03T07:27:47ZKhai thác dữ liệu người dùng đóng góp giúp nâng cao hiệu quả thực thi phần mềmĐối với các phần mềm và ứng dụng, việc thu thập dữ liệu từ người dùng càng nhiều sẽ càng góp phần cải thiện hiệu quả hoạt động của phần mềm và ứng dụng đó. Một ví dụ như việc những người dùng Google Map trả lời các câu hỏi hoặc cung cấp ảnh liên quan tới một địa điểm nào đó (thư viện, trường học, nhà hàng, bệnh viện,..) sẽ giúp nâng cao trải nghiệm của những người dùng tiếp theo. Bài báo này đi sâu vào việc cách thức người dùng có thể đóng góp vào việc nâng cao hiệu quả hoạt động của ứng dụng/phần mềm bằng cách cung cấp dữ liệu một cách tự động hay thủ công trong quá trình sử dụng ứng dụng / phần mềm đó. Một số ứng dụng liên quan sẽ được phân tích và làm rõ vai trò cung cấp dữ liệu của người dùng.Thi Hien Nguyenhiennt_tv@vnu.edu.vnThi Thu Nguyenthunt@haui.edu.vnThi Thuy Quynh Tranquynhttt@vnu.edu.vnDuc Tan Trantan.tranduc@phenikaa-uni.edu.vn2018-12-18T02:56:13Z2018-12-18T02:56:13Zhttp://eprints.uet.vnu.edu.vn/eprints/id/eprint/3333This item is in the repository with the URL: http://eprints.uet.vnu.edu.vn/eprints/id/eprint/33332018-12-18T02:56:13ZA Compact AWPC Antenna for DOA estimationAntennas without phase center (AWPC) have been used for Direction-of-Arrival estimation. However, these structures, being symmetric, always face the whole-space ambiguity problem. This paper proposes a new asymmetric AWPC structure for DOA estimation that is able to resolve the ambiguity in the whole space. In addition, the structure is optimized in such a way that it is compact and isotropic. Simulated results indicate the effectiveness of the proposed structureThi Thuy Quynh Tranquynhttt@vnu.edu.vnLinh Trung Nguyenlinhtrung@vnu.edu.vnAnh Phanphananh@rev.org.vnKarim Abed-Meraimkarim.abed-meraim@univ-orleans.fr2018-06-13T09:37:12Z2018-06-13T09:37:12Zhttp://eprints.uet.vnu.edu.vn/eprints/id/eprint/3021This item is in the repository with the URL: http://eprints.uet.vnu.edu.vn/eprints/id/eprint/30212018-06-13T09:37:12ZA simple Triple-band Filter for Wireless Communication ApplicationsThis paper proposes a simple microstrip triple-band filter for 2GHz/2.5GHz/3.5GHz band applications. The filter is designed based on combining a novel cross-shaped stub loaded resonator and a traditional half wavelength resonator to achieve multi-band and high selectivity. The position of each passband can be independently corrected by properly changing the lengths of microstrip lines, respectively. A triple-band microwave filter prototype has been fabricated and tested. The experiment results match well with the simulation results.Binh Duong Tranduongdtvt@gmail.comWenyuan LIlwy555@seu.edu.cnTrong Hieu Lelehieu626@gmail.comViet Tuan Duongvietroc04@yahoo.comThi Thuy Quynh Tranquynhttt@vnu.edu.vnDuc Tan Trantantd@vnu.edu.vn2017-10-06T02:58:15Z2018-01-10T07:56:52Zhttp://eprints.uet.vnu.edu.vn/eprints/id/eprint/2571This item is in the repository with the URL: http://eprints.uet.vnu.edu.vn/eprints/id/eprint/25712017-10-06T02:58:15ZA Novel Step Counter Supporting For Indoor Positioning Based On Inertial Measurement UnitStep counter provides important information on
various kinds of applications such as itinerary, exercise, health,etc. Especially, step counter is a very essential part for indoor positioning system in detecting exactly number of steps and supporting to find out the most suitable indoor position of people we want to track. In this paper, we proposed to develop a step counter system with high accuracy in comparison with the
commercial applications. The proposed system is using the
inertial measurement unit MPU9250 which consists of 3-DOF
gyroscope and 3-DOF accelerometer; these sensors were
calibrated carefully to avoid drift error. Furthermore, nRF24L01 wireless data transmitter/receiver is integrated for added convenience for users. After preprocessing, the recorded data are extracted from this IMU will be combined with step detection algorithm to find out the number of steps. The proposed algorithm was tested carefully with promising results of 96.5% in accuracy.Van Thanh Phamphamvanthanh1209@gmail.comThi Anh Dao Nguyendaonta81@gmail.comThi Thuy Quynh Tranquynhttt@vnu.edu.vnThi Phuong Dung Chudungctp@vnu.edu.vnDuc Tan Trantantd@vnu.edu.vn2016-12-25T17:06:03Z2016-12-25T17:06:03Zhttp://eprints.uet.vnu.edu.vn/eprints/id/eprint/2019This item is in the repository with the URL: http://eprints.uet.vnu.edu.vn/eprints/id/eprint/20192016-12-25T17:06:03ZHiệu năng của hệ thống tìm phương sử dụng anten không tâm pha bất đối xứngBài báo thực hiện việc đánh giá hiệu năng của hệ thống tìm phương sử dụng anten không tâm pha có cấu trúc bất đối xứng Asym-AWPC (Asymmetric - Antenna without Phase Center). Đây là cấu trúc anten có giản đồ pha là hàm phi tuyến đã được nhóm nghiên cứu đề xuất và tối ưu hóa về kích thước trong các công trình công bố gần đây. Khi kết hợp Asym-AWPC với thuật toán phân lớp nhiều tín hiệu MUSIC (MUltiple Signal Classification), hệ thống tìm phương này có khả năng ước lượng cùng lúc nhiều nguồn tín hiệu với độ phân giải cao trong toàn bộ không gian 360O ngay cả khi số nguồn tín hiệu đến lớn hơn số phần tử anten. Hiệu năng của hệ thống được đánh giá thông qua lỗi ước lượng góc và được so sánh với hệ thống sử dụng cấu trúc mảng tròn cách đều UCA (Uniform Circular Array), là cấu trúc được sử dụng nhiều trong thực tế. Dựa trên các kết quả mô phỏng, có thể thấy rằng hệ thống đề xuất có hiệu năng tốt hơn nhiều hệ thống sử dụng UCA với cùng số phần tử anten, đặc biệt trong các trường hợp tỷ số công suất tín hiệu trên công suất tạp âm SNR (Signal to Noise Ratio) thấp, khoảng cách giữa các góc của các nguồn tín hiệu đến nhỏ (độ phân giải cao), cũng như số mẫu tín hiệu thu thập tại mỗi phần tử anten ít.Thi Thuy Quynh Tranquynhttt@vnu.edu.vnAnh Vu Trinhvuta@vnu.edu.vnMinh Tuan Trantm_tuan@mic.gov.vnAnh Phanphananh@rev.org.vn2016-12-23T08:43:20Z2016-12-23T08:43:20Zhttp://eprints.uet.vnu.edu.vn/eprints/id/eprint/2017This item is in the repository with the URL: http://eprints.uet.vnu.edu.vn/eprints/id/eprint/20172016-12-23T08:43:20ZDirection-Of-Arrival Estimation using Special Phase Pattern Antenna Elements in Uniform Circular ArrayA theory model in which Uniform Circular Array (UCA) using special antenna elements for Direction of Arrival (DOA) estimation is presented. Simulation results show that although the number of incident sources is larger than the number of antenna elements, DOA spectrum using the proposed antenna model is still better than one using UCA with traditional antenna elements.Thi Thuy Quynh Tranquynhttt@vnu.edu.vnPhi Hung Phamhungpp@vnu.edu.vnAnh Phanphananh@rev.org.vnThi Hong Phamhongpt@korea.ac.krMinh Tuan Trantm_tuan@mic.gov.vn2016-12-19T16:38:19Z2016-12-19T16:38:19Zhttp://eprints.uet.vnu.edu.vn/eprints/id/eprint/2013This item is in the repository with the URL: http://eprints.uet.vnu.edu.vn/eprints/id/eprint/20132016-12-19T16:38:19ZOn Optimization of Antennas without Phase Center for DOA estimationAntennas without phase center (AWPC) are applied to resolve the less-sensors-than-sources problem in direction-ofarrival (DOA) estimation using subspace methods, typically, the well-known multiple signal classification (MUSIC) algorithm. This paper focuses on optimization of some design parameters of such antennas, including the rotation angle, the rotation step number and distances of two dipole couples, in order to improve the ambiguity and accuracy of all estimators which use AWPC structure. These optimization problems are formulated and solved by using Cramer-Rao bound (CRB) and ambiguity checking criteria. Specially, the parameters were optimized to avoid issues related to the ambiguity for half space localization problem while minimizing the CRB for improving the DOA estimation accuracy.Thi Thuy Quynh Tranquynhttt@vnu.edu.vnLinh Trung Nguyenlinhtrung@vnu.edu.vnAnh Phanphananh@rev.org.vnAbed Meraim Karimkarim.abed-meraim@univ-orleans.fr2016-05-30T07:00:20Z2016-05-30T07:01:51Zhttp://eprints.uet.vnu.edu.vn/eprints/id/eprint/846This item is in the repository with the URL: http://eprints.uet.vnu.edu.vn/eprints/id/eprint/8462016-05-30T07:00:20ZHiệu năng của hệ thống tìm phương sử dụng anten không tâm pha bất đối xứngThi Thuy Quynh Tranquynhttt@vnu.edu.vnAnh Vu Trinhvuta@vnu.edu.vnMinh Tuan TranAnh Phanphananh@vnu.edu.vn2016-05-27T05:06:14Z2017-01-02T10:26:09Zhttp://eprints.uet.vnu.edu.vn/eprints/id/eprint/1722This item is in the repository with the URL: http://eprints.uet.vnu.edu.vn/eprints/id/eprint/17222016-05-27T05:06:14ZAntenna without Phase Center for DOA Estimation in Compressive Array ProcessingRecently, Compressive Sensing (CS) has been applied to array signal processing. In theory, Direction-of-Arrival (DOA) estimation based on CS recovery can work well in
correlated environments. However, a large number of sensors (i.e., linear measurements) are still needed for CS recovery. To improve on this, we propose a new CS-based DOA estimation method with a recently designed antenna structure called the Asymmetric Antenna without
Phase Center (Asym-AWPC). The best reconstruction is achieved by solving the l1-norm optimization problem, which is cast as an l1-regularized least-squares program. Simulated results indicate the effectiveness of the proposed CS-based Asym-AWPC DOA estimator in a
multipath environment over a recent Asym-AWPC DOA estimator but using the Multiple Signal Classification (MUSIC) rather than CS. Further improvement on the resolution can be achieved by tuning the degree of asymmetry in designing the Asym-AWPC.Thi Thuy Quynh Tranquynhttt@vnu.edu.vnDuc Tan Trantantd@vnu.edu.vnLinh Trung Nguyenlinhtrung@vnu.edu.vnAnh Phananhphan@vnu.edu.vn2016-05-26T02:37:24Z2016-05-26T02:38:13Zhttp://eprints.uet.vnu.edu.vn/eprints/id/eprint/845This item is in the repository with the URL: http://eprints.uet.vnu.edu.vn/eprints/id/eprint/8452016-05-26T02:37:24ZDesign of a Simple OFDM-IF Transceiver on FPGAThi Thuy Quynh Tranquynhttt@vnu.edu.vnAnh Vu Trinhvuta@vnu.edu.vnHung Hai Hoang2016-05-20T08:59:53Z2016-05-20T09:00:37Zhttp://eprints.uet.vnu.edu.vn/eprints/id/eprint/1505This item is in the repository with the URL: http://eprints.uet.vnu.edu.vn/eprints/id/eprint/15052016-05-20T08:59:53ZDOA estimation systems in correlated environment: Asym-AWPC-CS and Asym-AWPC-SMLThi Phuong Nguyenntphuong169@gmail.comThi Thuy Quynh Tranquynhttt@vnu.edu.vn2015-09-06T08:28:34Z2016-12-07T15:44:40Zhttp://eprints.uet.vnu.edu.vn/eprints/id/eprint/1356This item is in the repository with the URL: http://eprints.uet.vnu.edu.vn/eprints/id/eprint/13562015-09-06T08:28:34ZAsymmetric Antennas without Phase Center and Compressive Sensing for DOA estimation in Correlated EnvironmentsThi Thuy Quynh Tranquynhttt@vnu.edu.vnDuc Tan Trantantd@vnu.edu.vnLinh Trung Nguyenlinhtrung@vnu.edu.vnAnh Phanphananh@vnu.edu.vn2013-03-27T06:10:17Z2013-06-29T04:20:32Zhttp://eprints.uet.vnu.edu.vn/eprints/id/eprint/150This item is in the repository with the URL: http://eprints.uet.vnu.edu.vn/eprints/id/eprint/1502013-03-27T06:10:17ZPerformance Comparison Between Simulation and Experimentation of a Specific Indoor Propagation SystemDuc Tan Trantantd@vnu.edu.vnN. D. AnhC. M. ThangB. L. P. LinhThi Thuy Quynh TranD. H. Hoang2013-01-25T07:15:41Z2016-12-07T15:47:57Zhttp://eprints.uet.vnu.edu.vn/eprints/id/eprint/128This item is in the repository with the URL: http://eprints.uet.vnu.edu.vn/eprints/id/eprint/1282013-01-25T07:15:41ZWhole-Space Ambiguity Removal in DOA Estimation by AWPC AntennaAntennas without phase center (AWPC) have been used to estimate direction of arrival (DOA) specially in less sensors than sources case. The similarity of two or more steering vectors corresponding to widely separated directions in the array manifold causes ambiguity in the DOA estimation. Recently, \textit{half}-space ambiguity resolution has been done by optimizing the structure of the AWPC, based on Cramer-Rao bound. This paper further proposes a novel method for resolving \textit{whole}-space ambiguity in the DOA estimation by using a uniform circular array (UCA) with multiple optimal AWPC sensors. The optimal number of AWPC sensors in moderate-size UCAs is also obtained by numerical optimization.Thi Thuy Quynh Tranquynhttt@vnu.edu.vnLinh Trung Nguyenlinhtrung@vnu.edu.vnAnh Phanphananh@vnu.edu.vnKarim Abed-Meraim