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| Number | Title | Issue Date |
| 8165547 | Apparatus and method for acquiring synchronization to support multi-frequency in mobile communication terminal An apparatus and a method for acquiring synchronization to support multi-frequency in a mobile communication terminal are provided. The apparatus includes a frequency generator, a control signal generator and at least two modems for operating respective Frequency Al... | 04/24/2012 |
| 8036614 | Replica DLL for phase resetting A method, algorithm, architecture, circuits, and/or systems for using a delay-locked loop (DLL) for phase adjustment in a direct conversion radio receiver are disclosed. The DLL is configured to avoid a perceived phase shift when the control voltage to a delay line ... | 10/11/2011 |
| 8036613 | Communication system and method for operating a communication system Communication system including a host and a device. The host has an oscillator and the device has a USB-function core. The oscillator in the host is coupled to the USB-function core in the device. ... | 10/11/2011 |
| 8000667 | System and method for compensating for modulation induced frequency shift during transmission of a radio frequency signal A method for compensating for frequency shifts during transmission of an RF control signal includes receiving a request to enter a transmission mode from a user. A carrier signal having a frequency is generated and the frequency of the carrier signal is measured. Th... | 08/16/2011 |
| 7917113 | Method for synchronization in a mobile radio terminal A method for synchronizing measurements in a mobile communication apparatus having a first active radio access means (100) adapted to communicate according to a first radio access technology (RAT) and at least a second passive radio access means (200) ... | 03/29/2011 |
| 7647032 | Oscillation control device and synchronization system An oscillation control device for controlling a frequency of an oscillator located at the remote site from a standard laboratory having a standard oscillator. The control device includes: a comparison section to compare a frequency of the frequency signal synchroniz... | 01/12/2010 |
| 7383025 | Method for processing RF signals for receiving and transmission Methodology for processing of RF signals for receiving and transmission, which varies the frequencies of local oscillators, in order to enable the receivers and transmitters to operate with higher performance in wider or multi-bands. bands. Their integrations into I... | 06/03/2008 |
| 7376207 | Apparatus for receiving and recovering frequency shift keyed symbols A receiver architecture for receiving an FSK signal having a predetermined number of modulation levels includes a selectivity filter (206) for selectively passing a wanted channel and rejecting unwanted channels. The selectivity filter has a filter bandwidth ... | 05/20/2008 |
| 7359711 | Methods and apparatus for improving accuracy of radio timing measurements A system, method, apparatus, means, and computer program code for improving accuracy of radio timing measurements. According to some embodiments, a wireless terminal or other wireless device can make adjustments to a measurement made from a radio transmission source... | 04/15/2008 |
| 7340123 | Optical multiplexer and demultiplexer systems and methods using interference filters Multiple channel multiplexing and demultiplexing systems and methods are provided for use in optical communication systems. In one embodiment, an optical multiplexer/demultiplexer system comprises an optical filter, a first optical isolator in optical communication ... | 03/04/2008 |
| 7336938 | Phase-alternating mixer with alias and harmonic rejection Rejection of local oscillator alias response is provided in a mixing circuit by (1) a switching mixer producing an output that changes at least twice between two states (e.g., high-low-high or low-high-low) during each local oscillator period, and (2) a charge integ... | 02/26/2008 |
| 7336934 | Transmission modulation apparatus Linear transmission modulation apparatus 100 has high frequency amplifier 102 that amplifies the high frequency phase modulation signal of a high frequency signal and power source voltage controller 101 that amplifies the baseband amplitude modu... | 02/26/2008 |
| 7321735 | Optical down-converter using universal frequency translation technology A method and system for converting an optical signal to electrical information signals, including demodulated baseband information signals and modulated baseband signals at multiple harmonics. In an embodiment, the optical information signal is amplitude modulated w... | 01/22/2008 |
| 7313373 | Crest factor reduction for use in a multiband transmitter Crest factor reduction in a multiband transmitter is described. Component signals (xi[n]) are respectively obtained from constituent signals. The component signals (xi[n]) are respectively associated with sub-bands. A superposed signal associat... | 12/25/2007 |
| 7295826 | Integrated frequency translation and selectivity with gain control functionality, and applications thereof Methods and apparatuses for frequency selectivity and frequency translation, and applications for such methods and apparatuses, are described herein. The method includes steps of filtering an input signal, and down-converting the filtered input signal. The filtering... | 11/13/2007 |
| 7292835 | Wireless and wired cable modem applications of universal frequency translation technology Frequency translation and applications of same are described herein, including cable modem applications. Such applications include, but are not limited to, frequency down-conversion, frequency up-conversion, enhanced signal reception, unified down-conversion and fil... | 11/06/2007 |
| 7292078 | Phase locked loop integrated circuits having fast locking characteristics and methods of operating same An integrated circuit device includes a fast-locking phase locked loop (PLL). This PLL includes a phase-frequency detector and first and second charge pumps, which are responsive to first and second control signals generated by the phase-frequency detector. The firs... | 11/06/2007 |
| 7289573 | Modulator/transmitter apparatus and method Method and apparatus for providing an amplified modulated radio frequency signal, the method comprising the steps of providing a radio frequency (RF) oscillatory signal, generating from the RF oscillatory signal and an input signal a pair of phase modulated phase co... | 10/30/2007 |
| 7289005 | Polar modulator and a method for modulation of a signal A polar modulator contains a phase locked loop which is designed to emit a radio-frequency signal at one frequency to one output, with the frequency being derived from the reference signal and from a phase modulation signal at a control input of the phase locked loo... | 10/30/2007 |
| 7280812 | Digital baseband receiver with DC discharge and gain control circuits A digital baseband (DBB) receiver for receiving and processing a wireless communication signal. The DBB receiver includes at least one low noise amplifier (LNA), at least one demodulator, a direct current (DC) discharge circuit and an LNA control circuit. The LNA se... | 10/09/2007 |
| 7277683 | Regenerative divider for up and down conversion of radio frequency (RF) signals The present invention relates generally to communications, and more specifically to a method and apparatus for generating local oscillator signals used for up- and down-conversion of RF (radio frequency) signals. A major problem in the design of modulators and demod... | 10/02/2007 |
| 7269424 | Mobile terminal implementing a ranging signal receiver and method Mobile terminal implementing a ranging signal receiver and method. Means are provided to incorporate ranging signal reception capability into a mobile terminal (such as a UMTS terminal) notwithstanding the fact that the ranging signal has a bandwidth that is wider t... | 09/11/2007 |
| 7228115 | Receiving method and receiver with high-precision signal estimation A phase rotation unit rotates the phase of a digital received signal in accordance with a correction signal from a correction determination unit. An FWT computation unit subjects a CCK modulated signal to FWT computation and outputs Walsh transform values FWT. A max... | 06/05/2007 |
| 7224138 | Method, system, and program product for feedback control of a target system utilizing imposition of a periodic modulating signal onto a command signal Feedback control of a target system is provided which utilizes the imposition of a periodic modulating signal onto a command signal of a controller. The command signal with the period modulating signal imposed thereon is input to the target system to be controlled. ... | 05/29/2007 |
| 7205849 | Phase locked loop including an integrator-free loop filter A phase locked loop PLL having a forward path and a feedback path is disclosed. A phase detector drives an oscillator in the forward path of the phase locked loop. The feedback path includes a frequency divider that connects the oscillator output to the phase detect... | 04/17/2007 |
| 7203476 | Method and apparatus for minimizing baseband offset error in a receiver An adaptive dc compensation technique (100) eliminates dc error for both digital and constant envelope modulation protocols (108). For analog modulation, a dc averaging technique utilizes piece-wise continuous dc averaging (110) that calculates ... | 04/10/2007 |
| 7181165 | Local wireless audio signal RF transmitter and receiver having a single downconverter without need for IF carrier A local wireless system for transmitting a modulated RF carrier audio signal from a base unit to a receiver unit is provided. The base unit has a pair of audio input connections of which are coupled to an audio source amplification device for receiving left and righ... | 02/20/2007 |
| 7181027 | Noise suppression in communications systems A communications system contains a network linking a number of communications devices participating in a communications session. During the communications session, the communications devices share information indicating when participants are speaking. Based on this ... | 02/20/2007 |
| 7177609 | Chopper-direct-conversion (CDC) radio architecture A chopper-direct-conversion (CDC) radio receiver includes a phase-alternating mixer receiving an antenna input signal and at least one local oscillator signal and generating a double sideband signal in a single mixing step. The phase-alternating mixer may be impleme... | 02/13/2007 |
| 7167682 | Radio frequency (RF) transceiver with substantially coincident communication of RF and related control signals A radio frequency (RF) transceiver for providing substantially coincident communication of RF and related baseband control signals. Baseband circuitry within the transmitter and receiver sections provides for storage of related control data which can be used in real... | 01/23/2007 |
| 7164897 | Method and apparatus for conversion of radio frequency (RF) signals using aperiodic mixing signals An inexpensive, high-performance, fully-integrable, multi-standard transceiver with a topology including: an active mixer, followed by a high pass filter, and a passive mixer. The input signal is modulated up, or demodulated down, using a pair of complementary, aper... | 01/16/2007 |
| 7151945 | Method and apparatus for clock synchronization in a wireless network A method and apparatus for synchronizing a local clock value in a wireless receiver receiving a data unit containing synchronization information. The method includes receiving a first data unit containing synchronization information, extracting the synchronization i... | 12/19/2006 |
| 7142818 | Systems and methods for reducing radio receiver interference from an on-board avionics transmitter Systems and methods for reducing interference in an enhanced radio receiver from a transmitter when both are located in the same aircraft are provided. The enhanced radio receiver detects and attenuates a signal from the transmitter, without attenuation or interfere... | 11/28/2006 |
| 7123670 | Fine frequency offset estimation and calculation and use to improve communication system performance A method for correcting influence of frequency offset between a receiver and a transmitter by evaluating training symbols received during a preamble period. The method includes producing, based on at least one long training symbol, a first vector whose first vector ... | 10/17/2006 |
| 7120412 | Calibration circuit for VCO A phase-locked loop circuit includes an array of selectable capacitors formed within the phase-locked loop circuit to enable the phase-locked loop circuit to provide a degree of coarse frequency control by adding or removing capacitors and a degree of fine frequency... | 10/10/2006 |
| 7116953 | Local oscillator using I/Q mismatch compensating circuit through LO path receiver using thereof A local oscillator provides an in-phase local oscillating signal and quadrature-phase signal to first and second mixers outputting an input signal with a mixed in-phase local oscillating signal and quadrature-phase local oscillating signal, respectively. The oscilla... | 10/03/2006 |
| 7116963 | Simplified high frequency tuner and tuning method A disclosed method tunes a signal from a channelized spectrum having a predetermined channel spacing. A signal of interest having a predetermined maximum bandwidth is mixed with a local oscillator signal, which has a frequency that is an integer multiple of the chan... | 10/03/2006 |
| 7110435 | Spread spectrum applications of universal frequency translation Frequency translation and spread spectrum applications of same are described herein. Such applications include, but are not limited to, unified down-conversion and de-spreading, unified up-conversion and spreading, RAKE receivers utilizing unified down-conversion an... | 09/19/2006 |
| 7110444 | Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments and circuit implementations Frequency translation and applications of the same are described herein, including RF modem and wireless local area network (WLAN) applications. In embodiments, the WLAN invention includes an antenna, an LNA/PA module, a receiver, a transmitter, a control signal gen... | 09/19/2006 |
| 7106021 | Method, system, and program product for feedback control of a target system utilizing imposition of a periodic modulating signal onto a command signal Feedback control of a target system is provided which utilizes the imposition of a periodic modulating signal onto a command signal of a controller. The command signal with the period modulating signal imposed thereon is input to the target system to be controlled. ... | 09/12/2006 |
