Patent application number | Description | Published |
20080266015 | Polar Modulation Apparatus and Method Using Fm Modulation - The present invention relates to a polar modulation apparatus and method, in which an in-phase and a quadrature-phase signal are processed in the analog domain to generate an analog signal corresponding to a derivative of a phase component of said polar-modulated signal. The analog signal is then input to a control input of a controlled oscillator ( | 10-30-2008 |
20110134964 | FREQUENCY SYNTHESIZER AND CONFIGURATION FOR AN ENHANCED FREQUENCY-HOPPING RATE - A frequency generating arrangement for generation of at least two predetermined frequencies is introduced. The arrangement comprises a phase locked loop circuit with at least two control value storage units and at least one controlled oscillator unit, wherein the control value storage units being configured to selectively output a control signal to the at least one voltage controlled oscillator unit, causing generation of one of the at least two predetermined frequencies. Frequency generating system for generation of ultra-fast hopping-frequency sequences comprises at least a first and a second frequency generating arrangement and further a controlling unit and a multiplexer unit for selectively connecting only one of the outputs of the two frequency generating arrangements with an output of the system. The controlling unit can be configured to control the system to generate a predetermined frequency sequence by controlling the two frequency generating arrangements such that during the period, in which one of the frequency generating arrangements is connected with the output of the system, the other frequency generating arrangement is controlled to lock to a next predetermined frequency of the predetermined frequency sequence, and to control the multiplexer unit pass the output of the other frequency generating arrangement to the system output after a predetermined time period; and repeating the controlling step in order to generate the predetermined frequency sequence. | 06-09-2011 |
20130028352 | DOWN-CONVERTER - A down-converter for receiving a multiband radio frequency signal (RF) and a local oscillator signal comprises a frequency divider and a heterodyne receive chain. The frequency divider is configured to divide the local oscillator signal and provide different divided local oscillator signals. The heterodyne receive chain comprises a first stage mixer and second stage mixers. The first stage mixer is configured to mix the multiband radio frequency signal and either the local oscillator signal or a divided local oscillator signal to generate a first intermediate frequency signal. Each second stage mixer is configured to mix the first intermediate signal and a divided local oscillator signal to generate second intermediate frequency signals that each represent a band from the multiband radio frequency signal. The frequency divider is configured to provide a different divided local oscillator signal to each of the second stage mixers. | 01-31-2013 |
20140241463 | PHASED ARRAY ANTENNA AND ASSOCIATED METHODS - A phased array transmitter is disclosed comprising a vector modulator, a true time delay block coupled to the vector modulator, a local oscillator phase shifter and RF-converter block coupled to the true time delay block, and an antenna. The vector modulator applies vector modulation to a baseband signal and provides an intermediate frequency signal to the true time delay block. The true time delay block applies a true time delay to the intermediate frequency signal and provides a delayed intermediate frequency signal to the local oscillator phase shifter and RF-converter block. The local oscillator phase shifter and RF-converter block multiplies the delayed intermediate frequency signal by a local oscillator signal and applies a phase shift to the delayed intermediate frequency signal to provide a radio frequency signal to the antenna for onwards transmission. | 08-28-2014 |