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7630290 |
Interference suppressing OFDM system for wireless communications
An IS-OFDM system for point-to-point wireless communications that suppresses narrow-band interference comprises an IS-OFDM transmitter and an IS-OFDM receiver, wherein a transmitted signal...
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7630457 |
Method and apparatus for demodulating a received signal within a coded system
A receiver includes an input, a correlator, a phase-assisted demodulator, and an output. The input receives a modulated signal and the correlator generates a plurality of correlation values from...
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7630463 |
Apparatus and method for acquiring synchronization in mobile communication system using OFDM scheme
Disclosed is a method for acquiring synchronization in a mobile communication system using an Orthogonal Frequency Division Multiplexing (OFDM) scheme. The method includes modeling a power delay...
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7627291 |
Integrated circuit having a routing element selectively operable to function as an antenna
An integrated circuit operable to wirelessly communicate with other devices by utilizing a radio transceiver and a routing element is disclosed. The routing element is operable to route a signal...
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7627059 |
Method of robust timing detection and carrier frequency offset estimation for OFDM systems
A symbol detector for an OFDM receiver determines the correlation of corresponding samples of at least two received preamble symbol samples, one of the samples delayed a predetermined duration with...
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7627295 |
Downconverter and upconverter
A downconverter and upconverter are provided which can obtain a sufficient image rejection ratio in a low-Intermediate Frequency (IF) scheme while reducing power consumption and can suppress Error...
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7627060 |
Receiver and method having envelope compensation signal
In some embodiments, methods and apparatus to reduce nonlinearity in a receiver are generally described herein. Other embodiments may be described and claimed.
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7623595 |
Digital technique of compensating mismatches between in phase and quadrature channels
Methods and systems for filtering an input signal include receiving a first demodulated signal produced by multiplying a first generated signal with a received input signal, receiving a second...
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7620111 |
Symbol interleaving
The invention relates to a method for communicating digital data using an orthogonal frequency division multiplexing (OFDM) transmission system ( 10 ) including at least one transmitter ( 600, 601...
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7620099 |
WCDMA terminal baseband processing module having multi-path scanner module
A baseband processing module according to the present invention includes a multi-path scanner module. The multi-path scanner module is operable to receive timing and scrambling code information...
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7616720 |
Multirate digital transceiver
A multirate digital transceiver in which, on reception, signals are simultaneously decimated and coarsely down converted in an iterative process to narrow down a received wideband to a desired...
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7616700 |
Method and system for slicing a communication signal
A slicer can receive a communication signal having a level or amplitude that is between two discrete levels of a multilevel digital communication scheme. The slicer can compare the communication...
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7616707 |
Methods and apparatus for reducing a sampling rate during a sampling phase determination process
A received signal is sampled at a sampling period of T+m*(T/n) during a sampling phase determination process. T is a symbol or chip period of the received signal, n is a number of phases of the...
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7609903 |
Spread spectrum signal demodulating method and apparatus
A spread spectrum signal demodulating method whereby spread-code synchronous acquisition and carrier synchronous acquisition are performed using FFT at high speed, wherein a received signal, of...
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7606330 |
Dual-rate single band communication system
A system, method, and apparatus for a multiple data rate communication system is presented herein. The communication system receives data samples that are either sampled at a narrowband rate or a...
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7602870 |
Symbol timing estimation in communication systems
A symbol timing estimation method is provided for use in a communication system, for example an orthogonal frequency division multiplexing system having a cyclic prefix extension CPE. Each symbol...
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7602863 |
Method and apparatus for providing iterative timing recovery
A method includes the steps of receiving a signal indicative of data bits, and performing per survivor processing-iterative timing recovery (PSP-ITR) on the received signal to generate...
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7599449 |
Hybrid modulus blind equalization for quadrature amplitude modulation (QAM) receivers
Methods and apparatuses for blind equalizers with a hybrid adaptation error. In one embodiment, a Quadrature Amplitude Modulation (QAM) signal receiver, includes: a filter to reduce error in...
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7599697 |
Method for backup connection and an electronic device using the method
The invention relates to a method for establishing an at least partially wireless data transfer connection between a remote application and a controlling application. The wireless connection is...
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7599452 |
Method and system for applying Viterbi type PSK demodulation for optimum correlation of GPS signals
A method and system of improving sensitivity in the demodulation of a received signal over an arbitrary measurement time epoch, the method comprising the steps of: correlating the received signal...
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7593491 |
Quadrature single-mixer multi-mode radio frequency receiver
The present invention is a quadrature multi-mode RF receiver that uses a single quadrature mixer for tuning to desired frequency bands. In a direct conversion mode of operation, the RF receiver...
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7593486 |
Apparatus and method for controlling transmission mode in a MIMO mobile communication system
An apparatus and method for controlling a transmission mode in a MIMO mobile communication system are provided. In a receiver in the MIMO mobile communication system, an error checker checks errors...
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7593490 |
Joint synchronizer and decoder
A joint synchronizer and decoder that implements two decision aided processes, which are referred to as “decision aided candidate selection” and “decision aided synchronization and...
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7590193 |
Frequency recovery apparatus and mobile broadcast receiver using the frequency recovery apparatus
A frequency recovery apparatus and a mobile broadcast reception system utilizing the frequency recovery apparatus are disclosed. The frequency recovery apparatus and the mobile broadcast receiver...
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7590199 |
Hybrid frequency offset estimator
A hybrid carrier frequency offset estimator that uses data-aided and non-data-aided signal processing techniques to produce multiple candidates for the carrier frequency offset within a return...
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7589586 |
High frequency signal detection circuit
A high frequency signal detection circuit includes an input terminal for a high frequency signal to be detected, a switch transferring the high frequency signal as intermittent ringing signal to a...
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7580481 |
I/Q timing mismatch compensation
Timing correction is affected for mismatch between channels in an I/Q demodulator. The respective demodulated I-channel and Q-channel are correlated and integrated so generate a timing control...
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7580480 |
Demodulation method using soft decision for quadrature amplitude modulation and apparatus thereof
In a soft decision method for demodulation of a received square QAM (Quadrature Amplitude Modulation) signal, the processing speed is improved, and the manufacturing expense is reduced, by using...
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7577214 |
OFDM signal receiver and receiving method
A receiver having a frequency-deviation detector which includes: a storage for locating and storing the frequency-domain symbol-signal in a two-dimensional data area on a two-dimensional space...
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7577419 |
Digital mixer system and method
A digital mixer system and method is disclosed. In an embodiment, a digital mixer can receive a modulated signal having a sample rate approximately equal to a clock rate divided by an integer...
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7577180 |
Method and system for maintaining synchronization in low-power mode over a frequency hopping radio link
Systems and methods for maintaining synchronization of a base unit and a portable unit in a low-power mode are provided. The base unit and the portable unit communicate with each other via wireless...
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7577215 |
Angle demodulation apparatus, local oscillation apparatus, angle demodulation method, local oscillation signal generating method, recording medium and computer data signal
An FM modulation signal is mixed with a pair of first local oscillation signals to be converted to a pair of base band signals. The base band signals are respectively mixed a pair of second local...
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7573954 |
Apparatus and method for compensating IQ imbalance in OFDM system with carrier frequency offset
An apparatus and method of an OFDM system for compensating IQ imbalance. The apparatus includes a mixer module for mixing a wireless signal to generate a pair of in-phase and quadrature-phase...
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7573338 |
Quadrature voltage controlled oscillator with automated phase control
A quadrature voltage controlled oscillator includes oscillation circuits for generating in-phase and quadrature-phase oscillation signals that are used to generate in-phase and quadrature-phase...
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7570716 |
Data carrier provided with at least two decoding stages
In a data carrier ( 1 ) which includes receiving means ( 5 ) for receiving a modulated carrier signal (MTS) which contains a data signal (DS 1 ) encoded in conformity with an encoding method (MA,...
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7570722 |
Carrier frequency offset estimation for OFDM systems
A system comprises a receiver module that receives a signal that is modulated using coherent orthogonal frequency division multiplexing (OFDM) modulation. A signal to noise ratio (SNR) module...
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7564926 |
Method and device for calculating zero-crossing reference sequences for signal detection of angle-modulated signals based on zero crossings of the received signal
A method for calculating zero-crossing reference sequences ({t i }) for the data detection of a sequence of zero crossings ({{circumflex over (t)} i }) of a received signal is disclosed. The data...
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7561860 |
Receiver
AM receiver 20 is provided with antenna 1 , RF amplifier 2 , I/Q mixer 3 , VCO 4 , impulse noise detector 5 , interpolator 6 , BPF 7 , IF amplifier 8 and AM detector 9 . I/Q mixer 3 ...
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7561643 |
DC offset correction in mobile communication system
A method of simultaneously determining a DC offset and a channel impulse response from a received signal in a mobile communication system. The received signal Y comprising a set of training...
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7561638 |
Demodulation apparatus and receiving apparatus
A demodulation apparatus that can support various oscillation frequencies. The portable phone device includes a frequency synthesizer for generating a local-oscillation signal having a local...
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7558326 |
Method and apparatus for sending auxiliary data on a TMDS-like link
A communication system including a transmitter, a receiver, and a TMDS-like link, in which video data and auxiliary data (typically including timing data associated with other auxiliary data) are...
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7558339 |
Asynchronous ZCD demodulator/decoder
There is provided a detector for extracting binary data frequency-modulated on a carrier signal. An axes generator produces M pairs of logic signals, the logic signals of the same pair being in...
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7555029 |
Method for decoding a plurality of standard radio waves and standard radio wave receiver
A method and a standard radio wave receiver for receiving a plurality of standard radio waves respectively having signal configurations in accordance with respective specifications which define...
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7545888 |
Apparatus for and method of controlling a digital demodulator coupled to an equalizer
A method of controlling a digital demodulator ( 922 ) coupled to an equalizer ( 930 ) includes the steps of generating an equalizer value ( 930 A), filtering ( 944 ) the equalizer value ( 930 A) to...
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7541966 |
Apparatus and method for demodulating a modulated signal
An apparatus for demodulating a modulated signal comprises an analog to digital converter ( 2, 12 ) for converting an analog modulated input signal to a digital signal. The analog to digital...
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7542100 |
Video receiver with adaptive image rejection
An analog video receiver implemented in an integrated circuit device. The analog video receiver includes first and second mixing circuits to generate a complex baseband signal by mixing a...
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7542524 |
Radio wave receiver, radio wave reception integrated circuit, wave clock, and repeater
A circuit for canceling noise components is provided for a radio wave receiver which receives a long wave standard radio wave. The circuit includes a multiplier, a divider, a differentiation...
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7535952 |
Reception apparatus and method of a mobile station in an mobile communication system
Disclosed is a reception apparatus and method of a mobile station in a Software Defined Radio (SDR) mobile communication system. A radio frequency (RF) processor converts a received RF signal into...
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7529533 |
Configurable homodyne/heterodyne radio receiver and RFID reader employing same
The embodiments of the present invention provide a configurable homodyne/heterodyne RF receiver including first and second mixers. The configurable homodyne/heterodyne RF receiver functions as a...
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7530004 |
Error correction apparatus using forward and reverse threshold functions
An error detection and correction apparatus includes three threshold logic units which make decisions based on current and previous bit values in a bit stream of block-coded data. One of the...
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