Showing 1-25 of 1,353 resultsfor "Index Terms":Impulse-radio Ultra-wideband
"Index Terms":Impulse-radio Ultra-wideband
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Respiration Rate Estimation Using IR-UWB Radar Based on the Second Maximum Eigenvalues
Ibrahim KAKOUCHE;Mohamed Salah AZZAZ;Abdelmadjid MAALI;Ammar MESLOUB;Mohamed SAAD;Djemal TEGUIG
2020 1st International Conference on Communications, Control Systems and Signal Processing (CCSSP)
Year: 2020 | Conference Paper |
Cited by: Papers (2)
Impulse Radio Ultra-Wide-Band (IR-UWB) radar is a promising technology for contact-less sensing applications, such as Vital Sign (VS) detection of human body. This paper presents a new approach for Respiration Rate (RR) estimation of a stationary person. The particularity of this approach is that does not require any pre-processing techniques. It is based on the estimation of the Second Maximum Ei...Show More
Broadband Microstrip Antenna for Application in Impulse Radio Ultrawideband Systems
2022 International Conference on Microwave and Millimeter Wave Technology (ICMMT)
Year: 2022 | Conference Paper |
A broadband antenna for impulse radio ultrawide-band (IR-UWB) localization is evaluated to confirm its suitability. The introduced antenna consists of a circular patch with eight concentrically positioned shorting pins, which is fed by a quasi-cone probe at its center. The antenna has an impedance band-width of 44.1%, which is from 6 to 9.4 GHz. The system fidelity factor (SFF) and group delay of ...Show More
IR-UWB Signal Parallel Multi-channel Digital Generation Method
2018 14th IEEE International Conference on Signal Processing (ICSP)
Year: 2018 | Conference Paper |
IR-UWB signal is a new communication technology, which has good concealment, anti-interference performance, strong resistance performance, high transmission, and a series of advantages. How to produce a very narrow pulse is an important research direction of IR-UWB communication. At present, the methods of producing IR-UWB pulse are mainly optoelectronic methods and electronic methods, which have ...Show More
High Resolution CMOS IR-UWB Radar for Non-Contact Human Vital Signs Detection
2020 IEEE Radio Frequency Integrated Circuits Symposium (RFIC)
Year: 2020 | Conference Paper |
Cited by: Papers (7)
This paper presents an impulse radio ultra-wideband radar transceiver chip for monitoring human vital signs, featuring a spectrum adjustable transmitter and equivalent time sampling based receiver. The radar receiver samples the echo signal at 20.48 GS/s, which corresponds to a 7.4 mm range resolution using high-speed track and hold sampler. The received pulses are added up to increase the SNR of ...Show More
Indoor Environment Device-Free Wireless Positioning using IR-UWB Radar
2018 IEEE International Conference on Artificial Intelligence in Engineering and Technology (IICAIET)
Year: 2018 | Conference Paper |
Cited by: Papers (4)
Impulse Radio Ultra-Wideband (IR-UWB) radar is a type of radar functioning based on UWB transmission technology that uses an exceedingly wide bandwidth low power impulse signal to continuously transmitting and receiving the impulse signal for object detection within a range. IR-UWB radar has shown promising utilization in realizing indoor environment device-free wireless positioning which is an em...Show More
Impulse radio ultra-wideband (IR-UWB) transmitter for low power low data rate biomedical sensor applications
2016 IEEE Topical Conference on Biomedical Wireless Technologies, Networks, and Sensing Systems (BioWireleSS)
Year: 2016 | Conference Paper |
Cited by: Papers (8)
This paper presents a fully integrated (on-off keying) impulse radio ultra-wideband (IR-UWB) transmitter suitable for low-power wireless biomedical sensors. The transmitter operates at 3-5 GHz frequency range with a channel bandwidth of ~2GHz. Implemented in a standard 130-nm CMOS process the proposed transmitter follows on/-off keying (OOK) modulation scheme and consumes an average power of 496 μ...Show More
We have recently proposed the Code-shifted-reference impulse UWB radio that overcomes the technical challenges encountered by other UWB systems. Further to our previous work, this paper presents a transmitter structure which implements the Code-Shifted Reference UWB transmission scheme. The transmitter is shown to operate in the lower UWB spectrum (3–5GHz), with a center frequency of 4.44GHz. It g...Show More
Learning-Refined Integral Null Space Pursuit Algorithm for Noncontact Multisubjects Vital Signs Measurements Using SFCW-UWB and IR-UWB Radar
Lihong Qiao;Xin Li;Bin Xiao;Mi He;Xiuli Bi;Weisheng Li;Xinbo Gao
Under low signal-to-noise-and-clutter ratio circumstances, noncontact multisubjects vital sign assessment based on ultrawideband (UWB) radar is extremely difficult. It is challenging to obtain an accurate measurement since the respiratory frequency harmonics are mixed with noise during detection and are extremely near to the frequency of the heartbeat signal. We use an impulse radio UWB (IR-UWB) r...Show More
Supervised Contrastive Learning for Vehicle Classification Based on the IR-UWB Radar
Impulse radio ultrawideband (IR-UWB) radar has high range resolution, strong anti-jamming ability, and low power consumption and has been widely used in target detection and recognition. Currently, existing studies always extract artificial features of echo signals, such as time–frequency images, Doppler features, or time-domain features, and then distinguish these features through well-designed d...Show More
A Hybrid Radar-Camera Respiratory Monitoring System Based on an Impulse-Radio Ultrawideband Radar
Chenxi Yang;Brendan Bruce;Xiaofan Liu;Behnood Gholami;Negar Tavassolian
2020 42nd Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC)
Year: 2020 | Conference Paper |
Cited by: Papers (6)
This paper reports a pilot study of a hybrid radar-camera system that simultaneously monitors the respiration of two subjects. A prototype system was built involving a low-cost impulse-radio ultra-wideband (IR-UWB) radar module and an optical and depth-sensing camera module. The system detects subjects using the camera and utilizes the distance information acquired to guide the signal processing o...Show More
Bi-Directional Passing People Counting System Based on IR-UWB Radar Sensors
IEEE Internet of Things Journal
Cited by: Papers (80)
In this paper, we propose system based on impulse radio ultra-wideband (IR-UWB) radar sensors for counting multiple people passing through a passage or a wide door. The proposed counting system utilizes two IR-UWB radar sensors equipped with antennas which have narrow beam width to form two invisible electronic layers in the path. The two electronic layers are used for sensing and direction recogn...Show More
People Counting Using IR-UWB Radar Sensor in a Wide Area
IEEE Internet of Things Journal
Cited by: Papers (44)
Conventional radar-based people counting systems are designed mainly for dense spatial distributions in a small region of interest (ROI). Therefore, a system with only conventional energy-based features, which are effective for a small ROI with a limited spatial distribution of individuals, generally fails to cope with the diverse and complex spatial distributions that arise from the freer movemen...Show More
Hybrid CNN-LSTM Network for Real-Time Apnea-Hypopnea Event Detection Based on IR-UWB Radar
Hyun Bin Kwon;Dongyeon Son;Dongseok Lee;Heenam Yoon;Mi Hyun Lee;Yu Jin Lee;Sang Ho Choi;Kwang Suk Park
Polysomnography (PSG) is the gold-standard for sleep apnea and hypopnea syndrome (SAHS) diagnosis. Because the PSG system is not suitable for long-term continuous use owing to the high cost and discomfort caused by attached multi-channel sensors, alternative methods using a non-contact sensor have been investigated. However, the existing methods have limitations in that the radar-person distance i...Show More
A Four Channel Impulse Radio Ultrawideband (IR-UWB) Front End Transmitter System for a 2 × 2 Quadrature Based Phased Array Antenna Designed in 180 nm CMOS Process
2022 IEEE Texas Symposium on Wireless and Microwave Circuits and Systems (WMCS)
Year: 2022 | Conference Paper |
Cited by: Papers (4)
One of the challenges of integrating phased array antennas with an IR-UWB transmitter system is to transmit impulse signals at various phases to achieve different beam steering angles and transmit the highest possible power efficiently to the antenna arrays to enhance the gain of the antenna. Prior works that demonstrated wireless power transmission schemes using ultrawideband signals, were limite...Show More
Circular Polarization Microstrip Antenna using Truncated Square Patches for IR-UWB Localization System
2020 IEEE 3rd International Conference on Electronic Information and Communication Technology (ICEICT)
Year: 2020 | Conference Paper |
Cited by: Papers (2)
The design of circular polarization microstrip antenna using truncated square patch has been discussed, which is working in the frequency bandwidth ranging from 4.35 GHz to 4.84 GHz. Moreover, the 2×2 antenna array with a distance of about 0.56λ (λ is the electromagnetic wavelength) is presented to get a good port isolation in order to fulfill the application in an impulse radio ultra-wideband (IR...Show More
IEEE 802.15.4a-based Impulse Radio Ultra-Wideband system with joint channel equalization and decoding
2014 IEEE International Conference on Ultra-WideBand (ICUWB)
Year: 2014 | Conference Paper |
Cited by: Papers (2)
The paper proposes a modification of the hybrid PPM/BPSK modulation described in the IEEE 802.15.4a Impulse Radio Ultra-Wideband (IR-UWB) Physical Layer (PHY) specifications. Proposed modulation is intended for reception by the coherent IEEE 802.15.4a IR-UWB PHY receivers; it considerably reduces the distance between PPM positions compared to the IEEE 802.15.4a IR-UWB PHY specifications. In this w...Show More
High-Resolution Impulse Radio Ultra Wideband Ranging
2007 IEEE International Conference on Ultra-Wideband
Year: 2007 | Conference Paper |
Cited by: Papers (2)
We propose a high resolution ranging algorithm for impulse radio Ultra-wideband (UWB) communication systems in gaussian noise. We pose the ranging problem as a Maximum Likelihood (ML) estimation problem for the channel delays and attenuations and phase offset at receiver. Then we translate the obtained delay estimates into an estimate of the distance. The ML problem is very non linear and hard to ...Show More
Maximum Free Distance Binary to $M$-ary Convolutional Codes for Pseudo Chaotic Type Time Hopping PPM Impulse Radio UWB
The topic of spectral line suppression is of major interest in the design of pulse position modulated time hopping impulse radio ultra wideband communications systems. Previously pseudo-chaotic time hopping (PCTH) has been introduced to eliminate spectral lines and improving bit error rates (BER). In this letter, new binary to M-ary maximum free distance convolutional codes are introduced showing ...Show More
Evaluation of ultra wideband impulse radio transmission loss due to laptop computer
2009 IEEE 9th Malaysia International Conference on Communications (MICC)
Year: 2009 | Conference Paper |
Cited by: Papers (2)
This paper presents the evaluation of the transmission gain of an ultra wideband antenna on a labtop computer based on the extended Friis' transmission formula. The matched filter is considered at the receiver side to maximize the SNR for evaluation. This technique gives very accurate results and is very useful for the design and evaluation of UWB impulse radio transmission systems, especially for...Show More
Flexible FPGA-DSP solution for an IR-UWB testbed
Ciprian George Gavrincea;Xavier Artiga;Ana Moragrega;Christian Ibars;Marco di Renzo
2009 IEEE International Conference on Ultra-Wideband
Year: 2009 | Conference Paper |
Cited by: Papers (1)
A flexible solution for hardware implementation of an IR-UWB testbed processing unit is presented on this paper. The FPGA-DSP hybrid architecture satisfies the reconfigurability requirements of a testbed and provides enough processing power needed for an UWB communication. The proposed solution has been used to implement an UWB testbed for ranging and low data rate communications that complies wit...Show More
TOA Estimation for IR-UWB System Using Matrix Pencil
2009 WRI World Congress on Computer Science and Information Engineering
Year: 2009 | Conference Paper |
Cited by: Papers (5)
This paper presents a method to estimate Time of arrival (TOA) of impulse radio ultra wideband (IR-UWB) in a multipath communication channel. Matrix Pencil (MP) is used to recover these delays from the channel frequency response. This algorithm has some key advantages over traditional super-resolution techniques such as multiple signal classification (MUSIC) method. Most importantly, Matrix Pencil...Show More
Joint TOA and DOA Estimation of IR-UWB System Based on Matrix Pencil
2009 International Forum on Information Technology and Applications
Year: 2009 | Conference Paper |
Cited by: Papers (5)
This paper presents a method to estimate time and direction of arrival (TOA and DOA) of impulse radio ultra wideband (IR-UWB) system based on matrix pencil (MP) in a multipath communication channel. It is used to recover time and angle from the channel frequency response. This algorithm only requires a single channel estimate and can estimate TOA and DOA easier and faster. The results show that TO...Show More
A novel design of 8-Gbps IR-UWB pulse generator
2012 International Conference on Computer and Communication Engineering (ICCCE)
Year: 2012 | Conference Paper |
Cited by: Papers (2)
In this paper, a novel design of 8 Gbps impulse radio ultra wideband (IR-UWB) pulse generator for short distances wireless communication is presented. The proposed pulse generator is based on 250 ps pulses, which gives advantages in pulse generation and detection error reduction. The generated pulses satisfy the regulations of UWB Federal Communication Commission (FCC) indoor and outdoor masks, wh...Show More
A tunable OOK IR-UWB pulse generator in 0.18 µm technology
Jelena Radic;Alena Djugova;Laszlo Nagy;Mirjana Videnovic-Misic
2013 2nd Mediterranean Conference on Embedded Computing (MECO)
Year: 2013 | Conference Paper |
Cited by: Papers (1)
A new energy-efficient, tunable impulse radio ultra-wideband (IR-UWB) pulse generator is investigated in the paper. The low complexity architecture is composed of a data and clock synchronization block, a glitch generator, an impulses combiner, and a pulse shaping filter. It is designed and simulated in low-cost 0.18 μm UMC CMOS technology. The simulation results showed spectrum that covers whole ...Show More
Differential Space-Time Block Coding for IR-UWB
2009 International Forum on Information Technology and Applications
Year: 2009 | Conference Paper |
In order to enhance the transmission performance of the IR-UWB (impulse radio ultra wideband) system, the space-time technology of MIMO (multiple input and multiple output) has been considered. In view of the low power in the UWB mobile terminal, we need to estimate the channel in the receiver when using the space-time code. However, the complexity of the terminal is increased. For this reason, th...Show More
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