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WO/2006/135275A2 |
The invention relates to signal transmitting engineering. The use of the inventive method in systems for transmitting and receiving quadrature amplitude-modulation signals (QAM) exhibiting a low carrier frequency synchronisation threshol...
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WO/2006/126166A2 |
A demodulator (70) suitable for a multi-mode receiver (101 ), demodulates (50, 520, 540, 550) samples having a sample rate not an integer multiple of the specified data rate of a current mode, and decimates (60, 160, 545) demodulated sam...
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WO/2006/128188A2 |
A method for channel estimation in a wireless communication system includes the following steps. Channel transfer function is computed at continual and scattered pilot cells using transmitted and received signals at the continual and sca...
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WO/2006/128114A1 |
A phase detector apparatus and method (200) used for clock recovery from a data signal is provided. The phase detector provides phase correction signals to a clock signal generator (206), where the phase correction signals are only gener...
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WO/2006/124427A2 |
For rate selection with margin sharing in a system with independent rate per stream, SNR estimates are obtained for multiple data streams. Rates are then selected for the data streams based on the SNR estimates and such that at least one...
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WO/2006/123349A1 |
Method and apparatus for sensing the envelope of high level multi frequency- band RF signals in power amplifiers. For each frequency band, an RF transistor (Nch1, Nch2, Nch3) such as a FET or a bipolar transistor is operated essentially ...
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WO2005104388B1 |
A system for synchronizing a portable transceiver (100) to a network that includes a crystal oscillator (250), logic coupled to the crystal oscillator, the logic configured to estimate a frequency error of a received signal; and a first ...
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WO/2006/122094A2 |
This patent disclosure presents circuits, systems and methods to produce a stable signal from a reference signal source (110). These new inventions are far better than the current technologies to provide a stable signal with less phase n...
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WO/2006/122190A2 |
A fast hopping frequency synthesizer (182) and transmitter (170) associated therewith. The frequency synthesizer and transmitter incorporates a digitally controlled oscillator (DCO) (188) to operate open loop. Instantaneous frequency swi...
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WO/2006/119171A2 |
A system and method for synthesizing a frequency using a multi-phase oscillator. A state machine operating on one of the phases of the oscillator computes, based on a pair of input integers, a phase select vector that indicates when a pa...
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WO/2006/118184A1 |
A plurality of circuit blocks are provided in a semiconductor device which collects and corrects impairment quantities of discretionary areas in a circuit group of various types having random couplings. The semiconductor device is provid...
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WO/2006/117834A1 |
A semiconductor device is provided with a demodulating circuit (1) for demodulating an amplitude-modulated voltage signal. The demodulating circuit is provided with a detecting circuit (10) which detects the amplitude-modulated voltage s...
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WO/2006/117599A2 |
A BALUN circuit (20) for low voltage operation for receiving single ended input signal at an input terminal (24) and providing a differential output signal across a pair of output terminals (OUT+, OUT-) is disclosed. The BALUN circuit (2...
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WO/2006/119065A2 |
A signal processing method and device are provided to perform an arbitrary signal processing or filtering function on a continuous time signal. An input continuous time signal is successively delayed by a plurality of delay elements to p...
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WO/2006/116334A2 |
A DC offset detection and cancellation system for a receiver is disclosed. The DC offset detection and cancellation system comprises a downconverter configured to downconvert a received signal to a baseband level signal, the downconverte...
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WO/2006/111901A2 |
An arrangement is described for demodulating a vestigial sideband signal component contained in an amplitude-modulated frequency signal, and preferably in a vision intermediate-frequency signal derived from a television signal. What dist...
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WO/2006/111916A2 |
The present invention provides a broadband waveguide mixer, comprising: a waveguide having a substantially v-shaped groove in its inner surface; a broadband antenna coupling in the V-groove; and mixing means for mixing signals received b...
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WO/2006/109216A1 |
A subharmonic mixer circuit having an input stage (52) and a current modulating stage (64) is disclosed. The input stage (52) receives an RF input signal (RF+, RF-) at a first frequency and generates output currents (il, i2) varying in d...
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WO/2006/107615A2 |
Methods, devices and systems are provided for bit synchronizing multiple serial bitstreams (106) with a common clock signal (116). Activity occurring in each bitstream is detected (304) for each of a plurality of phases corresponding to ...
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WO/2006/105565A1 |
The invention relates to a method for demodulating load-modified signals in a system and to a reading device (LES), which supplies a high-frequency carrier signal (ST) to a transmitting antenna (ANT). Passive transponders (TRA) located i...
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WO/2006/107466A2 |
A method and apparatus are provided for providing improved radio frequency (RF) receiver signal correction. For RF receiver circuitry (106) having receive path and a warmup period associated therewith and including at least one analog ba...
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WO/2006/106038A1 |
A system for rendering an acoustic signal comprises a signal source (1), disposed on the transmitter end, for an electric signal that corresponds to an acoustic signal, and a signal processing device (7, 8) receiving the electric signal....
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WO/2006/103673A2 |
An inverted ladder circuit for a Digital to Analog Converter (DAC) having an input binary word representing an input value and an output current corresponding to a converted analog value. The inverted ladder circuit includes at least two...
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WO/2006/101997A2 |
The present invention is related to an enhanced equalizer (106) using channel estimation. A scaled version of a channel estimate is used as an expected average behavior of the product of a transmitted signal and a received signal to impl...
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WO/2006/102125A2 |
Embodiments of methods and apparatuses for gating impulse noise in a communication system are described. In one embodiment, a quality measure of a received signal on a communication channel is not adjusted when corruption by impulse nois...
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WO/2006/101607A1 |
A method and system (100) for mitigating interference in a communication system, comprising at least one base station (102) and at least one terminal (104), are disclosed. The base stations and terminals communicate through a channel (10...
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WO/2006/101672A1 |
A receiver (200) for receiving and demodulating a frequency modulated RF signal by a direct conversion procedure includes an input signal path (101) for receiving an RF input signal (x(t)), an I-channel (103) connected to the input signa...
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WO/2006/099267A2 |
A STBICM MIMO receiver (200) includes a plurality of demappers (210) for demapping a plurality of complex symbols transmitted a STBICM MIMO transmitter (110). Each demapper is configured to have one or more complex symbols associated the...
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WO/2006/095051A1 |
A measurement circuit for measuring a level of a radio frequency signal comprises a first signal path adapted to conduct a first version of a radio frequency signal and a second signal path adapted to conduct a second version of said rad...
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WO/2006/092662A2 |
The disclosed invention provides a method, a system and a computer program product for the maximum likelihood sequence estimation of transmitted MSK symbols. The disclosed invention provides a set of optimizations of the Viterbi algorith...
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WO2006009707B1 |
A burst mode receiver includes a digital phase detector, receiving an incoming signal. The receiver also includes a charge pump, receiving pulse signals from the digital phase detector to compare the incoming clock phase to the local gen...
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WO/2006/088926A1 |
Methods, apparatuses, and systems are presented for deriving data from a composite signal involving (a) receiving a composite signal comprising contributions from a plurality of individual signals transmitted over different paths, the pl...
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WO/2006/087506A1 |
This invention relates to improved architectures for digital audio broadcast (DAB) receivers, in particular multiband DAB receivers. A digital audio broadcast (DAB) receiver, the receiver comprising: an rf input to receive rf signals in ...
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WO/2006/085046A1 |
This invention relates to apparatus and methods for radio receivers, in particular low (IP) frequency receivers. Embodiments of the invention are particularly suitable for digital audio broadcast receivers. A low-IF radio receiver circui...
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WO2005101778B1 |
A method of controlling sampling frequency of a sampling device (40), where the sampling device (40) generates samples (62) in response to the receipt of a signal (20) resulting from a transmission of a series of symbols through a channe...
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WO/2006/086214A2 |
In accordance with the present invention, the system and method removes interfering signals from a communications signal and includes a Fast Fourier Transform (FFT) circuit (104) for taking the FFT of a received signal and segmenting the...
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WO/2006/082534A2 |
The present invention provides a method and apparatus for phase compensating in a wireless communication digital receiver. The method and apparatus for phase compensating pre-compensate a received expected signal sequence, which was pre-...
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WO/2006/083487A2 |
According to one exemplary embodiment, a digital phase detector includes a phase/frequency detector, where the phase/frequency detector is configured to receive a reference signal and a divided oscillator feedback signal and output a fir...
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WO/2006/079807A1 |
A demodulator for demodulating a modulated signal has a peak detector (206) with an input (100) coupled to receive the modulated signal and an output (207) to supply a peak detector output signal. The peak detector has a charge storer (3...
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WO/2006/077552A1 |
The system and method of the present invention provide a single mixer (200-400) with significantly reduced noise performance at a low cost by adding a current control circuit (109) that reduces the current in at least the switching stage...
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WO/2006/077525A1 |
A low-power high dynamic range RF input stage (200) with a noiseless degeneration component, such as a capacitor (201), is provided. High dynamic range means a combination of low noise contribution by the stage (200) and a low level of i...
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WO/2006/078818A2 |
A limiter based analog demodulator includes a power amplifier (32) receiving a base-band signal and a local clock operating at the base-band frequency. A first multiplier (34) receives an output from the power amplifier and the local clo...
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WO/2006/075285A2 |
The present invention provides a low intermediate frequency receiver for receiving radio frequency signal and provides the sampling method thereof. The low intermediate frequency receiver firstly samples the radio frequency signal so as ...
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WO/2006/073742A2 |
An RF mixer includes a diode quad including first, second, third and fourth carbon nanotube diodes, each carbon nanotube diode including a p-n junction The mixer also includes a RF input coupled each of the diodes, and a local oscillator...
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WO/2006/071508A2 |
A tracking circuit (100) is provided for controlling a locally-generated clock. A receive channel (110) in the tracking circuit receives an incoming signal and a local clock, generates a local signal based on the local clock, and compare...
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WO/2006/067681A2 |
The present invention provides a phase compensation method and apparatus for wireless communication receiver. The phase compensation method and apparatus estimate the receiver's phase -related mismatch information based on the predetermi...
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WO/2006/068862A2 |
A system and method for classifying channels in a frequency hopping wireless communication system is provided. A data collection engine operates to obtain channel metrics (30) indicating the level of interference for each channel used by...
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WO/2006/068719A2 |
An RFID circuit comprising an RF carrier signal source, a hybrid coupled to the RF carrier signal source operable to generate first and second phase-shifted RF carrier signals, first and second mixers coupled to the hybrid each operable ...
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WO/2006/063766A1 |
The invention relates to a frequency converter (100, 150) for the spectral conversion of a starting signal having an actual frequency into an end signal having a target frequency. The starting signal has an I component having a plurality...
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WO/2006/063767A1 |
The invention relates to a mixer for mixing a signal (x) from an actual frequency (f0) to form a target frequency, said signal being in the form of a sequence of discrete-time values with a temporal distance (TA) between two discrete-tim...
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