The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Delay lines are widely employed in high-speed circuit for delay time synchronization and timing skew minimization, popular schemes are serpentine and spiral routing. In order to reduce the manufacture cost and routing area, spacing between adjacent unit lines should be smaller, but it increases in electromagnetic coupling and crosstalk from adjacent lines. In conventional serpentine and spiral delay...
This paper presents a minimized wearable inertial measurement units (IMU) which consists of a three-axis accelerometer, a three-axis gyroscope, a three-axis magnetometer. These sensors are Micro-electromechanical Systems (MEMS) devices, which have advantages of lower cost, smaller size and lower power consumption. The size of MEMS IMU is 23×23×4mm that is small enough to be easily fixed on hand, waist...
This paper presents a minimized wearable inertial measurement units (IMU) which consists of a three-axis accelerometer, a three-axis gyroscope, a three-axis magnetometer. These sensors are Micro-electromechanical Systems (MEMS) devices, which have advantages of lower cost, smaller size and lower power consumption. The size of MEMS IMU is 23×23×4mm that is small enough to be easily fixed on hand, waist...
In order to solve the selection of effective singular values, first the characteristic of the singular values of both ideal signals and noise signals was analyzed, a determination method of least squares error was proposed. Then the impact on signal de-noising by analyzing different number of singular values, indicated that the number of effective singular values were accurate and reliable by using...
The electrical fan, based on the induction motor, operate with very low efficiency on the high slip, when the speed control is used by the series inductors. In order to improve the efficiency, inverter benefit with Pulse Width Modulation (PWM) methods included the unipolar PWM and the bipolar PWM is discussed. The new type two-phase induction motor speed control is first designed and compared with...
We experimentally investigate modulation formats for realizing high data rate and high power sensitivity using coherent reception with low noise-figure optical preamplification. 40 Gbit/s PS-QPSK exhibits a sensitivity of 4.3 photons/bit while 100 Gbit/s PDM-QPSK exhibits a sensitivity of 5.3 photons/bit at 3.8×10−3 BER.
Electromagnetic interference (EMI) filters are treated much as the effective equipments for controlling EMI. However, traditional EMI filter design methods are difficult, because the measurements of impedances are not easy due to the existences of parasitic parameters. In this paper, EMI filters are modeled by scattering parameters(S-parameter.) The paper also gives EMI digital filter design methods...
A novel transform-domain image watermark based on chaotic sequences is proposed in this paper. A complex chaos-based scheme is developed to embed a gray-level image in the wavelet domain of the original color image signal. The chaos system plays an important role in the security and invisibility of the proposed scheme. The parameter and initial state of chaos system directly influence the generation...
The detection performance of spatial diversity multiple-input multiple-output (MIMO) radar for Swerling I and Swerling II target is analyzed based on coherent pulses. The detection method provides an unified frame for conventional radar and the MIMO radar. Simulation results demonstrate that MIMO radar can get better detection performance when more coherent pulses is used. In contrast with conventional...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.