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.
In this paper, a compact and low-cost electronic circuit system is designed for time-reversal of ultra-wideband short impulses (with nanosecond and sub-nanosecond temporal durations). A frequency-domain approach is adopted to avoid high sampling rate in time. Specifically, the proposed system obtains the discrete spectra of input impulses first; then realizes time-reversal in frequency domain; and...
A feasibility study of frequency domain ADCs for an Impulse-UWB receiver is presented. A frequency domain ADC consists of a bank of narrow band bandpass filters and integrators, followed by a conventional ADC. The filter bank produces the 'spectrum samples' (Fourier series coefficients) at frequencies corresponding to the center frequencies of the bandpass filters in the filter bank. The Fourier series...
With ever increasing complexity in new mechanical structures, as well as aging structures in operation, locating damage with structural health monitoring techniques is becoming increasingly important. Permanent deployment of structural health monitoring systems is limited by the availability of sensor technology. Previous efforts to miniaturize the hardware required for the impedance method of structural...
Structural health monitoring is desirable in many fields to provide a means of damage detection on a variety of structures. Unfortunately, the ability to equip structures with health monitoring systems is limited by the development of adequate hardware. Previously, prototypes using the impedance-based health monitoring method have been developed to lay a foundation for permanent structural damage...
Existing secure RFID tags rely on digital cryptographic primitives in the form of hashes and block ciphers, which lead to large system latencies, high tag power-consumption and large tag silicon area. In addition, existing passive RFID systems rely on simple coding and modulation schemes using narrowband radio frequencies, which can easily be eavesdropped or jammed. To address the above problems,...
A UWB CMOS LNA uses the Miller effect with one additional inductor to achieve a broadband input match. The LNA has a power gain>15dB, S11<-10.5dB, S22< -13.1dB and NF<2.3dB over the 3 to 5GHz range. It is fabricated in 0.18mum CMOS and draws 6.4mA from a 1.8V supply
This paper proposes a new signaling method for efficient scan design based on the dual use of on-chip power lines. The proposed signaling scheme intends to increase the channel capacity for the multiple parallel scan design, and we suggest adoption of the UWB (ultra wideband) and direct sequence-code division multiple access (DS-CDMA) communication technologies. Because of the wide bandwidth, a UWB...
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.