Abstract:
A method and apparatus for a non-linear adaptive scheme for transmit out of band emission cancellation is provided. Embodiments disclosed herein provide a method for removing unwanted transmitter emissions from a composite received signal. The method performs the steps of: extracting the I and Q samples from a modulator output; inputting the I and Q samples to a non-linear filter; applying weights to the non-linear filter outputs, combining the non-linear filter outputs to generate a broadband emission estimate; selecting a portion of a transmit emission in a desired portion of a receive band; subtracting an output of the non-linear filter from a composite signal; and feeding back a residual error to the non-linear filter; adapting the non-linear filter iteratively.
Abstract:
A system and method including an algorithm that can use the linear time shift property of the subcarrier modulation to provide accurate frame synchronization for communications between nodes in a wireless network, where nodes employ orthogonal frequency division multiplexing (OFDM) modems. The subcarrier modulation is typically performed with a Fast Fourier Transform (FFT) that includes a time shift between Inverse Fast Fourier Transform (IFFT) and guard interval insertion at transmission, but due to the guard insertion, the system and method of the present invention corrects the time shifts allowing accurate TOF calculations.
Abstract:
A non-oxidizing electrode arrangement for an excimer lamp that is formed by coating an electrode of the lamp with a layer of protective layer that prevents the electrode from oxidizing. The protective layer is preferably transparent and possesses a low permeability for oxygen (e.g., silicon oxide, magnesium fluoride, calcium fluoride). The interior of the excimer lamp is evacuated to a pressure level that is lower than the pressure level surrounding the excimer lamp at any time during the non-oxidizing electrode formation process in order to assist in preventing the excimer lamp from fracturing.
Abstract:
A method for driving a PDP having an address period (T3) in which data is written by applying an address pulse (PaA) to a data electrode while applying first scanning pulses (PaS1) sequentially to a first display electrode and a sustaining period (T4) in which a sustaining pulse is applied between the first display electrode and a second display electrode after the address period (T3), wherein during the address period (T3), a second scanning pulse (PaS2) having the opposite polarity to that of the first scanning pulses (PaS1) is applied to the second display electrode (i)paired with the first display electrode (i) in order to prevent erroneous discharge during the address period (T3), thus eliminating crosstalk.
Abstract:
A simultaneous double discharge plasma display panel improves luminous efficiency and luminance by modifying an electrode structure, so that a double discharge operation can be performed in one cell. A plurality of cells include first and second scan electrodes which are aligned in parallel on a first substrate; first and second sustain electrodes which are aligned in parallel between the first and second scan electrodes; and an address electrode aligned orthogonally to the respective scan electrodes and sustain electrodes on a second substrate. The first and second scan electrodes are commonly connected to all the scan electrodes in the cells of the PDP. The first and second sustain electrodes are commonly connected to the cells. Accordingly, the discharge operation is simultaneously performed between the first scan electrode and the first sustain electrode, and between the second scan electrode and the second sustain electrode.