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.
This paper proposes a means to reduce torque ripple in a 2 poles, 30 (W) small size BLDC motor in radial blower. The BLDC motor have six times torque ripple interval per one period. This problem is the cause of noise and vibration that leads to the degradation of the output torque. For example, First, cogging torque is generated due to the reluctance difference of the teeth of the stator core for...
The segmental two-dimensional Mel-frequency cepstral coefficient (STDMFCC) feature has been successfully used in recent studies to detect objectionable sounds, which implicitly represent both static and dynamic characteristics of signal. This study now proposes a new normalized STDMFCC to improve the content recognition performance in diverse noisy environments. Two tests were conducted to verify...
Capacitive touch screens have become widely adopted in mobile applications. Capacitive touch-screen display modules have conventionally been assembled by bonding two separate modules: 1) a touch-screen module with touch panel glass or film attached to the cover window, and 2) a display module, with a small air gap between them as in Fig. 6.4.1 (top). An important role of the air gap is to decrease...
We present a display-driver IC embedding a capacitive-touch-screen controller. It is designed to operate with conventional overlay-type and on-cell touch display panels. The IC exhibits performance of 40 ms latency and 120 Hz update rate within ??0.5 mm jitter. It has been evaluated on a 16.7 M-color wQVGA AMOLED panel with on-cell touch screen.
This paper introduces an efficient method to calculate the total isotropic sensitivity (TIS) of a mobile phone. The method is implemented by using the EM simulation, the digital signal modeling and the RF link budget simulation. By considering digital harmonic noise, the accuracy of the TIS calculation can be increased. Simulation results for the phone structure show the availability of this proposed...
We propose QUEST (QUality ESTimation), a new method that accurately estimates IEEE 802.11 wireless link quality with no in-band signaling overhead. Existing link quality estimation methods either are based on hello exchanges by fixing or varying transmission rates or rely on the history (e.g., delivery ratio) of previously sent data packets in a per-rate/-neighbor manner. QUEST on the other hand,...
While two-dimensional (2-D) orthogonal variable spreading factor (OVSF) codes were proposed for multicarrier direct-sequence code-division multiple-access (MC/DS-CDMA) systems in order to eliminate multiple-access interference, the number of orthogonal sequences (or code cardinality) was restricted by the number of carrier frequencies. Non-orthogonal 2-D frequency-time-spreading (FTS) codes were then...
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.