Spatio-frequency domain opportunistic access in CR-MIMO system based on primary transmission mode information by Zhao LI, Jian-dong LI, Li-yuan XIAO

“…An opportunistic spatio-frequency access (OSFA) strategy for CR-MIMO system was designed.When spectrum holes exist,cognitive service was implemented applying overlay approach.While there was no idle spectrum available,primary transmission mode information (PTMI) and inter-system interference channel information were exploited.And cognitive service was implemented using underlay approach.The method utilizes both spatial correlation and eigenmode transmission gain in spatial resource quality aluation.Consequently,selection diversity of both authorized channel and cognitive eigenmode was achieved.Moreover,PTMI based signal processing reduced the antenna requirement for cognitive system as well as the power loss of cognitive signal.Simulation results indicate that the proposed method could achieve significant improvement of cognitive service and near-optimal cognitive throughput on the premise that no interference is imposed on the primary.…”
Get full text

Problématiques associées au développement d’un bouchon d’oreille « intelligent » by Jérémie Voix, Frédéric Laville

“…The issues are related to occupational health and safety aspects (non-continuous wearing of the hearing protector and unadapted protection), technical aspects (development of a comfortable earplug both from the physical and sound perception point of view and whose performances are measurable) and scientific aspects (modeling of physical systems, signal processing, instrumentation and measurement techniques).…”
Get full text

Two-Step Frequency Estimation of GNSS Signal in High-Dynamic Environment by Chao Wu, Yafeng Li, Liyan Luo, Jian Xie, Ling Wang

Get full text

Calibration of Accelerometers by Shock Excitation and Laser Interferometry by Alfred Link, Hans-Jüurgen von Martens

“…A signal processing method for determining the dynamic behavior of accelerometers by shock excitation and laser interferometry is presented. …”
Get full text

A STUDY ON FATIGUE DAMAGE IDENTIFICATION METHOD OF A BLADE COMPOSITE LAMINATE WITH DELAMINATION DEFECTS (MT) by YU FangAi, ZHOU Bo, ZHANG XueYan, XIN Wen

“…A method of the acoustic emission signal processing based on harmonic wavelet power spectrum and energy spectrum is proposed. …”
Get full text

Port Contention Aware Task Scheduling for SIMD Applications by Shogo Saito, Kei Fujimoto

“…Single instruction multiple data (SIMD) instructions in central processing units (CPU) are becoming commonly used in usecases such as wireless signal processing and artificial intelligence (AI) inference. …”
Get full text

Load forecasting based on knowledge flow and transfer learning by Wenjun ZHU, Sining WANG, Xiaoxin GAO, Qian ZHENG

“…In all things connected, comprehensive perception, intelligent decision-making information era of big data, in the information acquisition of big data and a large amount of signal processing, there are still large amount of data redundancy, calculation and the shortcoming of high cost, not in time, and no marked.The transfer learning was applied, and the knowledge flow system based on the weight impact factor for information fusion was integrated to assist the analysis and simplify the calculation for the IoT sensing system.The knowledge flow mode of transfer learning and data fusion was adopted in the IoT sensing system, and the simulation calculation of short-term load prediction was made based on the partial data of regional power consumption.The influencing factors of users’ electricity consumption behavior were analyzed, and the optimal weight distribution of influencing factors was obtained through training, so as to predict the power consumption rate.The results show that in this way, it can clearly identify the characteristics of electricity consumption behavior, and predict the energy consumption according to the characteristics of electricity consumption.…”
Get full text

Focusing of Spotlight Tandem-Configuration Bistatic Data with Frequency Scaling Algorithm by Shichao Chen, Ming Liu, Jun Wang, Fugang Lu, Mengdao Xing

Get full text

The Application and Analysis of Emotion Recognition Based on Modern Technology by Bi Lanxin

“…Physiological signal recognition offers deep insights into internal emotional states but requires complex signal processing and is vulnerable to external interferences. …”
Get full text

Estimation and compensation for transmitter and receiver I/Q imbalance of full-duplex terminals by Hao-wei WU, Jun-bo ZHAO, Hao-ran XU, Jing-lan OU

“…In order to reduce I/Q imbalance of the full-duplex terminal with direct-conversion transceiver,an algorithm based on self-interference signal was proposed for the estimation and compensation of I/Q imbalance in both transmitter (Tx) and receiver (Rx).Without the perfect transmitter or receiver for I/Q imbalance estimation,the self-interference signal from Tx chain to Rx chain was used for parameter estimation and separation,and the Tx and Rx I/Q imbalance parameters were obtained,respectively.Then the pre-compensation before transmission and the correction after receiving was processed,so that there was nearly no I/Q imbalance in this full-duplex terminal from the view of the other terminals,and the complexity of the signal processing will be reduced as a result of the absent of the I/Q imbalance estimation.The simulation results show that the proposed algorithm can effectively estimate and compensate the I/Q imbalance of the full-duplex Tx ＆ Rx terminal,and improve the overall signal quality and the system performance.…”
Get full text

The Partial Inner Product Space Method: A Quick Overview by Jean-Pierre Antoine, Camillo Trapani

“…Many families of function spaces play a central role in analysis, in particular, in signal processing (e.g., wavelet or Gabor analysis). Typical are 𝐿𝑝 spaces, Besov spaces, amalgam spaces, or modulation spaces. …”
Get full text

Improved embedded wideband speech codec fitting EV-VBR standard by XIN Jie, BAO Chang-chun, JIA Mao-shen, LIU Xin

“…Based on the International Telecommunication Union Telecommunication Standardization Sector（ITU-T） recommendation for EV-VBR coding standard and the candidate codec designed by Speech and Audio Signal Processing Laboratory（SASPL） of Beijing University of Technology,an improved embedded variable bit rates wideband speech codec was proposed.In the improved codec,ACELP coding was implied to the first two coding layers.The middle sub-frame spectral parameters were computed and quantized.Three pulses depth first tree search algorithm was designed.On the higher three coding layers embedded TCX coding was reconstructed by accumulating frequency coefficients vectors.Addition-ally,VAD and DTX functions were implemented in the improved codec.Test results show that the improved codec achieves better speech quality and much lower coding complexity than the original codec.The speech quality and coding efficiency are comparable with G.718 of a new ITU-T speech coding standard and the low delay feature is retained.…”
Get full text

Heterogeneous federated bidirectional knowledge distillation transfer semi-supervised modulation recognition by Peihan QI, Yuanlei DING, Kai YIN, Jiabo XU, Zan LI

“…The large-scale deployment and rapid development of the new generation mobile communication system underpin the widespread application of a massive and diverse range of Internet of things (IoT) devices.However, the distributed application of IoT devices results to significant disparities in private data and substantial heterogeneity in local processing models, which severely limits the aggregation capability of global intelligent model.Therefore, to tackle the challenges of data heterogeneity, model heterogeneity, and insufficient labeling faced by intelligent modulation recognition in cognitive IoT, an algorithm was proposed for heterogeneous federated bidirectional semi-supervised modulation recognition, which incorporated bidirectional knowledge distillation.In the proposed algorithm, a public pseudo dataset was generated by variational autoencoder in the cloud for supporting uplink global knowledge distillation, and adaptively sharing to the local devices for downlink heterogeneous knowledge distillation, while integrating a semi-supervised algorithm within the distillation process.The simulation results indicate that the proposed algorithm outperforms current federated learning algorithms in terms of effectiveness and applicability in the field of communication signal processing.…”
Get full text

Load-Balanced Secure Routing Protocol for Wireless Sensor Networks by Wang Xin-sheng, Zhan Yong-zhao, Wang Liang-min

Get full text

Experiment and Analysis of Gearbox Shell Vibration Modal based on DASP by Ma Weijin, Zhang Lin, Zhang Jiping, Huang Bincheng, Ge Yumin

“…Through the experiment of the vibration modal of gearbox shell,the gearbox shell vibration state is analyzed and the stability of its operation is evaluated.By using DASP（Data Acquisition& Signal Processing）software,the vibration modal of the HW25505 TCL type aluminum alloy gearbox shell is tested.By the contrast between ERA method and PloyLSCF method,the reliable 1⁴order of frequency and damping are obtained,and thus the vibration mode analysis is carried out.By using modal correlation matrix of modal to test and verify,through the comparison with calculating modal,the validity and reliability are proved.Applied DASP to vibration modal test of gearbox shell,not only the gearbox shell high order frequency,damping,vibration mode,and vibration condition can be acquired,but also the vibration problem of similar shell gearbox in operation can be solved,The theoritical basis for the improvement of the gearbox shell structure characteristics and the fault diagnosis of gearbox shell are provided,and had better promotion value in engineering practice.…”
Get full text

A survey on Wi-Fi signal based identification technology by Zhongcheng WEI, Xinqiu ZHANG, Bin LIAN, Wei WANG, Jijun ZHAO

“…With the constant progress of the information technology, the research on identification is developing towards unawareness and automation, and applied widely in many fields, such as human-computer interaction, smart home and intelligent security.As a non-contact wireless sensing technology, Wi-Fi signal based identification is progressively evolving towards the directions of multi-attribute identification and legality verification.Firstly, the principle of wireless signal-based identification was introduced, and reviews pretreatment processes from the viewpoint of signal processing were reviewed.Then, identification implementation was discussed from two different bases of walking and daily activities.Two major development trends of identification which were multi-attribute identification and legality verification were discussed from function evolution’s views.Finally, the multiple research areas were indicated including hyper-level feature extraction, daily activities’ analysis, identification model construction, and multi-technology fusion as future directions of realizing more robust, diversify and universal identification, which would provide the important support for the research and development of Internet of things perception layer.…”
Get full text

An Island Grouping Genetic Algorithm for Fuzzy Partitioning Problems by S. Salcedo-Sanz, J. Del Ser, Z. W. Geem

Get full text

A New Combination of RAKE Receiver and Adaptive Antenna Array Beamformer for Multiuser Detection in WCDMA Systems by Shahriar Shirvani-Moghaddam, Hajar Sadeghi

Get full text

Noise Radar Technology as an Interference Prevention Method by Gaspare Galati, Gabriele Pavan

“…The advent of fast digital signal processing and signal generation techniques makes it possible to use waveform diversity to solve this problem that will be exacerbated in the next future. …”
Get full text

Recurrences Reveal Shared Causal Drivers of Complex Time Series by William Gilpin

“…Through extensive benchmarks against classical signal processing and machine learning techniques, we demonstrate our method’s ability to extract causal drivers from diverse experimental datasets spanning ecology, genomics, fluid dynamics, and physiology.…”
Get full text