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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 8184747 | Flexible timebase for EYE diagram A flexible timebase for eye diagrams uses a stable free running oscillator as a sample clock for equivalent time sampling of an input serial digital signal and of a reference signal derived from a subdivided recovered clock of the input serial digital signal. The re... | 05/22/2012 |
| 8179998 | Communication signal receiver for estimating an imaginary-part component of a complex data signal and method thereof A communication signal receiver includes a feed-forward filter and a coefficient adjusting circuit. The feed-forward filter generates an estimated imaginary-part component signal according to a real-part component of a complex data signal by using tap coefficients o... | 05/15/2012 |
| 8165246 | Training sequence for low latency LMS implementation Use of a training sequence having terms that are orthogonal to each other are employed to considerably speed up execution of the LMS algorithm. Such orthogonal sequences are developed for a channel that is described as a finite impulse response (FIR) filter having a... | 04/24/2012 |
| 8139687 | Method to track a target frequency of an input signal A digital demodulator adapted in a receiver and a digital demodulation method are provided. The digital demodulator includes: a phase splitter, a complex multiplier, an AFC, a limiter, a phase detector, a re-tracker, a post-multiplier and an oscillator. The phase sp... | 03/20/2012 |
| 8135093 | Carrier frequency offset estimation method and system In one aspect of the invention, a carrier frequency offset (CFO) estimation method to estimate a CFO value of a received signal is provided, and the method comprises: receiving a preamble signal which includes several non-perfect repeat segments; applying an interpo... | 03/13/2012 |
| RE43224 | Data aided symbol timing system for precoded continuous phase modulated signals Data aided carrier phase and symbol timing synchronizers are implemented at baseband as digital modulators isolating input signal inphase and quadrature component signals fed into inphase and quadrature Laurent transforms that function as data detector to provide od... | 03/06/2012 |
| 8116407 | Data recovery system and method thereof A data recovery system and method is disclosed. Said data recovery system comprises a maximum-likelihood detector, a non-maximum likelihood detector, signal-length calculator, a determining unit and a selecting unit. The maximum-likelihood detector transforms a digi... | 02/14/2012 |
| 8107561 | Method and apparatus for carrier frequency offset estimation and frame synchronization in a wireless communication system A method for performing carrier frequency offset estimation and frame synchronization is disclosed herein. In one approach, the method includes performing a first level frequency discrimination on at least one estimated channel tap to generate a frequency discrimina... | 01/31/2012 |
| RE43131 | Carrier tracking circuit and method including dual numerically controlled oscillators and feedforward phase correction coefficient A carrier tracking circuit includes a first phase adjustment circuit coupled to an input of a delay element and a second phase adjustment circuit coupled to an output of the delay element. A phase correction circuit is coupled to output of the delay element is opera... | 01/24/2012 |
| 8102948 | Carrier recovery apparatus and method thereof A carrier recovery apparatus includes a pilot strength detector, a first lock loop, a second lock loop, and a controller. The pilot strength detector determines whether a pilot strength of an input signal is greater than a threshold value to generate a control signa... | 01/24/2012 |
| 8098769 | Circuit and method for recovering a carrier The invention relates to recovering a carrier for a synchronous demodulator, that receives an input signal. A carrier is reconstructed for the provided input signal, and the input signal (in) and carrier (tr) are mixed to generate a mixed signal to be outputted (i, ... | 01/17/2012 |
| 8090057 | Robust burst detection and acquisition system and method A method of parameter estimation in a shared channel communications system includes the steps of receiving a preamble including a first sequence corresponding to a sequence having zero autocorrelation, a second sequence having zero autocorrelation, and a third seque... | 01/03/2012 |
| 8085878 | Digital broadcasting system and data processing method A receiving system and data processing method therein are disclosed, by which mobile service data is received and processed. The receiving system comprises a tuner, a filter, an IQ mismatch processor, a gain controller and a demodulator. The tuner tunes radio freque... | 12/27/2011 |
| 8077806 | Wireless reception device automatically establishing frequency synchronization or phase synchronization The wireless reception device has automatic frequency control unit for detecting, from a reception modulation signal frequency-converted to the baseband, a frequency deviation component of a carrier wave between transmission and reception sides that is contained in ... | 12/13/2011 |
| 8077807 | Adaptive timing using clock recovery Circuits and methods are provided for adjusting a frequency of a local clock signal in approximating a frequency of a host clock signal. A phase locked loop generates a local clock signal having a first phase and a first frequency. An offset adjustment circuit recei... | 12/13/2011 |
| 8068563 | Systems and methods for frequency offset correction in a digital radio broadcast receiver Methods and systems for correcting a frequency error in a digital portion of a radio broadcast signal are disclosed. The methods and systems include the steps of receiving a radio broadcast signal having an analog portion and a digital portion, separating the analog... | 11/29/2011 |
| 8064543 | Channel equalizer and method of processing television signal in DTV receiving system A channel equalizer includes a channel estimator, a coefficient calculator, a multiplier, and an error remover. The channel estimator estimates a channel impulse response (CIR) of input data in which a known data sequence is periodically inserted. The coefficient ca... | 11/22/2011 |
| 8045649 | Carrier recovery system and carrier recovery method The invention provides carrier recovery systems and carrier recovery methods. The carrier recovery system comprises a compensation signal generator, a compensation device and a mode selector. The compensation signal generator generates a compensation signal based on... | 10/25/2011 |
| 8040978 | Tracking system The present invention relates to a tracking system comprised in a receiver, which tracking system is operable to track rapid changes in frequency and phase offset. The tracking system comprises a first system operable to perform a pilot-based phase and frequency tra... | 10/18/2011 |
| 8036318 | Clock and data recovery circuit The phase detector compares the phases of a synchronous clock signal and serial data and outputs a phase error signal corresponding to a comparison result. The second integrator performs integration of the phase error signal to obtain a phase correction control sign... | 10/11/2011 |
| 8031813 | VSB receiver and carrier recovery apparatus thereof There are provided a VSB receiver and a carrier recovery apparatus thereof, in which a carrier is recovered using a VSB modulated signal. In the VSB receiver, a digital processing part selects a desired channel frequency through an antenna, converts the channel freq... | 10/04/2011 |
| 8019022 | Jitter-tolerance-enhanced CDR using a GDCO-based phase detector An embodiment of a clock and data recovery circuit comprising a first clock and data recovery circuit with high bandwidth and a second clock and data recovery circuit with low bandwidth is disclosed. The first clock and data recovery circuit with high bandwidth rece... | 09/13/2011 |
| 7986751 | Carrier frequency offset estimating device and system A carrier frequency offset estimating device for estimating frequency offsets of a multi-carrier signal includes a transforming circuit, a cosine effect eliminating circuit, a model creating circuit, and an estimating circuit. The transforming circuit receives the m... | 07/26/2011 |
| 7983361 | Clock data recovery circuit A clock data recovery circuit. The clock data recovery circuit comprises a transmission line, a phase locked loop, a voltage controlled oscillator, a phase selector, and a D flip-flop. The transmission line receives an input signal. The phase locked loop receives th... | 07/19/2011 |
| 7983362 | Programmable data sampling receiver for digital data signals Receiver architectures and bias circuits for a data processor are provided. A receiver architecture includes a linear receiver having a first input node for a data (DQ) signal, a second input node for a reference voltage, and output nodes for a differential output s... | 07/19/2011 |
| 7978790 | Method and circuit for carrier control in a quadrature demodulator The invention relates to a method and a circuit for carrier control in a quadrature demodulator, wherein a complex-value input signal (I, Q) is supplied to a mixer (1) to perform mixing with a mixing frequency (fm) to create a mixed signal (Ir, Qr), the mixed... | 07/12/2011 |
| 7974367 | Symbol timing method and digital receiver apparatus The present invention provides for receiving a radio frequency signal which encodes transmitted data, and for outputting data corresponding to the transmitted data. The radio frequency signal is received and converted to inphase and quadrature data. Phase informatio... | 07/05/2011 |
| 7961818 | Method and system for adaptive timing recovery Timing recovery in partial-response-based magnetic recording systems customarily employs the “decision-directed” method wherein phase error is recovered from the differences between the noise-corrupted received signal samples and their estimated ideal (noise and... | 06/14/2011 |
| 7944999 | Robust fine frequency and time estimation in mobile multimedia multicast system receivers A technique for estimating a carrier frequency offset and a timing offset in a MediaFLO™ (Forward Link Only) system, wherein the method comprises receiving Orthogonal Frequency Division Multiplexing (OFDM) symbols; interpolating pilots on odd or even symbols of th... | 05/17/2011 |
| 7929644 | Instant-acquisition clock and data recovery systems and methods for serial communications links Methods and systems for recovering clock and data in data streams communicated over serial communications links. An exemplary serial communications receiver system includes a line receiver configured to receive a data stream from a serial communications link and an ... | 04/19/2011 |
| 7920653 | Method and circuit arrangement for suppressing an orthogonal perturbation The invention relates to a method as well as a circuit arrangement for suppression of a perturbing quadrature component of a carrier signal of an amplitude-modulated signal during the recovery of the carrier signal in a synchronous demodulator, which outputs a quadr... | 04/05/2011 |
| 7899136 | Frequency-offset estimation A device for calculating an overall frequency-offset estimate from a plurality of frequency-offset estimates includes a receiver unit configured to receive a plurality of data streams, a phase shift estimation unit configured to generate a phase shift quantity repre... | 03/01/2011 |
| 7889816 | Clock and data recovery circuit and communications apparatus including the clock and data recovery circuit A clock and data recovery circuit that includes a unit to output N-phase clocks each of which has a phase shifted from the others by a time T2 obtained by dividing a clock period P1 by N, a unit to obtain sampling data serially transferred every time T... | 02/15/2011 |
| 7885361 | Method and apparatus for 0/180 degree phase detector An embodiment of the present invention provides a system for detecting a phase-shifted signal at high frequencies in data and clock recovery circuitry. An up-pulse generator, in one embodiment, provides output pulses having a duration exceeding the duration of input... | 02/08/2011 |
| 7885362 | Data transmission system and method thereof A data transmission system includes a transmitter and a receiver. The transmitter mixes an original clock signal and an original data signal to generate and output a hybrid differential signal, the hybrid differential signal having multiple clock pulses and multiple... | 02/08/2011 |
| 7881408 | Digital broadcasting system and method of processing data A digital broadcast system is disclosed. The digital broadcast system including a transmitter, a receiver, and a method for transmitting and receiving a DTV signal comprising main service data and mobile service data multiplexed with the main service data. The DTV s... | 02/01/2011 |
| 7869544 | System for measuring an eyewidth of a data signal in an asynchronous system An eyewidth of a data signal is determined by steps including: (a) recovering a phase of a clock from a data signal as a sampling clock; (b) shifting the phase of the sampling clock away from the first phase by a count multiplied by predetermined phase amount; (c) s... | 01/11/2011 |
| 7864891 | Method and apparatus for acquiring a frequency burst in a radio communication device A methodology for acquiring a frequency correction burst using a radio communication device including an RF circuit and digital processing circuitry is disclosed. The radio communication device employs a time period during which an signal acquisition time window is ... | 01/04/2011 |
| 7860190 | Multi-channel timing recovery system The present invention, in particular embodiments, is directed to methods, apparatuses and systems that provide global timing error information derived from timing error information of each data channel. This is achieved, in part, by summing the timing error informat... | 12/28/2010 |
| 7852971 | False channel detection for wireless communication Techniques for detecting acquisition of a false channel in a wireless communication system are described. For false channel detection, a peak corresponding to a signal from a base station is initially detected. Frequency acquisition and time tracking of the peak are... | 12/14/2010 |
