In this study, based on multirate technique, the detection problem of DS-CDMA systems is transformed to an equivalent signal of beamforming systems. In this situation, the channel plus spreading code in DS-CDMA system...
详细信息
The choice of algorithms and the hydrophone array is the key of getting high precision in underwater targets detection. Using LabVIEW and 8 channel data acquisition card the underwater targets noise was gathered. Base...
详细信息
ISBN:
(纸本)9780769535050
The choice of algorithms and the hydrophone array is the key of getting high precision in underwater targets detection. Using LabVIEW and 8 channel data acquisition card the underwater targets noise was gathered. Based on the MATLAB, the algorithms of underwater targets estimation have been confirmed The water tank experiments have shown that this system can realize to acoustic signal gathering, processing. The results obtained in this paper can give reference for array shape and algorithms selection.
Modern defence acitivites often require sophisticated technology to enable protection of sites and troops, as well as understanding and predicting events in the battlefield. The need for protection against chemical at...
详细信息
Previous studies in urban wireless communications underscored an angular spread of the signals reaching the base station antenna array. In this case, many of the arrayprocessing methods based on the point source assu...
详细信息
The proceedings contain 22 papers. The topics discussed include: ultrasonic anemometer for the measurement of respiratory flow in the forced oscillation technique;implementation of SPR-biosensors for express-diagnosti...
详细信息
ISBN:
(纸本)1424410800
The proceedings contain 22 papers. The topics discussed include: ultrasonic anemometer for the measurement of respiratory flow in the forced oscillation technique;implementation of SPR-biosensors for express-diagnostics of acute viral infection and mycotocsicosis;measurements of generated potentials by the electrodes of a cochlear implant;measurements of generated potentials by the electrodes of a cochlear implant;evaluation of water barrier function of human skin using super fast dew point hygrometer;development of EMFI-sensor based pressure sensitive insole for gait analysis;fetal electrocardiogram signal modeling using genetic algorithm;processing EEG signals for clinical interpretation in seizure-suspected patients;multiple channel electrooculogram classification using automata;haptic exercises for measuring improvement of post-stroke rehabilitation patients;andsignal-shape locked loop (SSLL) as an adaptive separator of cardiac and respiratory components of bio-impedance signal.
In recent and future wireless cellular communications, Co-Channel Interference (CCI) is very critical problem. At basestation, adaptive array antenna technology exploiting spatial domain filtering with antenna array a...
详细信息
Because standard cameras sample the scene at constant time intervals, they do not provide any information in the blind time between subsequent frames. However, for many high-speed robotic and vision applications, it i...
详细信息
ISBN:
(纸本)9781509041961
Because standard cameras sample the scene at constant time intervals, they do not provide any information in the blind time between subsequent frames. However, for many high-speed robotic and vision applications, it is crucial to provide high-frequency measurement updates also during this blind time. This can be achieved using a novel vision sensor, called DAVIS, which combines a standard camera and an asynchronous event-based sensor in the same pixel array. The DAVIS encodes the visual content between two subsequent frames by an asynchronous stream of events that convey pixel-level brightness changes at microsecond resolution. We present the first algorithm to detect and track visual features using both the frames and the event data provided by the DAVIS. Features are first detected in the grayscale frames and then tracked asynchronously in the blind time between frames using the stream of events. To best take into account the hybrid characteristics of the DAVIS, features are built based on large, spatial contrast variations (i.e., visual edges), which are the source of most of the events generated by the sensor. An event-based algorithm is further presented to track the features using an iterative, geometric registration approach. The performance of the proposed method is evaluated on real data acquired by the DAVIS.
In a scenario in which several GNSS systems, GPS, Galileo, GLONASS, COMPASS, QZSS, are planning to coexist in the same frequency band, spectra/signal structure management and relative power levels are the main instrum...
详细信息
ISBN:
(纸本)9781424487417
In a scenario in which several GNSS systems, GPS, Galileo, GLONASS, COMPASS, QZSS, are planning to coexist in the same frequency band, spectra/signal structure management and relative power levels are the main instruments to counteract the possible impact of intersystem interference, and the ability to increase the transmit power on individual signal components from GNSSs system providers has become an important feature of the modernized satellite payloads. Among the modernizations that GPS Block IIR-M and IIF Space Vehicles payload underwent, one of them is the capability of programmable power output also known as "flex power" capability. The flex power capability enables operators of the system to increase the signal strength of the military P(Y) and M-code signals, if needed by Department of Defense (DoD) and allied GPS users. The 2nd Space Operations Squadron (2SOPS) experimented, over the course of five days during the month of September, the use of this programmable power output capability in several SVs. This paper provides an analysis of the C/No measured from sensor stations where the transmit power level changes that GPS satellites underwent during the days from the 7th of September 2010 to the 12th can be assessed. Moreover, a theoretical analysis based on real measurements collected with the STFC (UK) 25m Radio Observatory [1] is presented, providing a possible explanation on how the flex power capability may have been implemented on board.
The proceedings contains 24 papers from the 1997 2ndieee-CAS Region 8 workshop on Analog and Mixed IC Design. Topics discussed include: analog/digital interface in submicron IC's;low power/low voltage circuits;lo...
详细信息
The proceedings contains 24 papers from the 1997 2ndieee-CAS Region 8 workshop on Analog and Mixed IC Design. Topics discussed include: analog/digital interface in submicron IC's;low power/low voltage circuits;low power, low-voltage ROMs;intermediate frequency-sampling modulators;high-performance modulator design using computer aided design tools;IC microsensors;CMOS readout chip for pixel detectors;tunable perceptual microsystem for stereo depth estimation;capacitive sensors;silicon vertex track detector;dynamic translinear circuits;current mode and translinear design;programmable pulse based mixed-signalprocessing VLSI;high-accuracy high-speed continuous-time current comparators;and massively-parallel analog array processors.
The problem of symbol synchronization for semi-blind antenna arraysignalprocessing in digital communications is considered. It is relevant to situations where the location of known training symbols within a slot of ...
详细信息
暂无评论