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7248649 |
Digital baseband receiver including a time domain compensation module for suppressing group delay variation distortion incurred due to analog low pass filter deficiencies
A digital baseband (DBB) radio frequency (RF) receiver used for receiving and processing a wireless communication signal. The DBB receiver includes a demodulator, first and second analog low pass...
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7245655 |
Dual antenna receiver
Structures and techniques for implementing multiple-antenna configurations within a radio frequency receiver are provided. In one aspect, a modularized multi-antenna receiver is provided having...
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7245651 |
Dual mode filter for mobile telecommunications
A dual mode filter for mobile communication may implement two disparate cellular systems such as GSM and W-CDMA. The same transceiver may be utilized to selectively receive and transmit in either...
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7245670 |
Method for channel equalization, a receiver a channel equalizer, and a wireless communication device
The invention relates to a method for channel equalization in a receiver, in which a signal is received from a communication channel, the signal containing symbols formed of binary information by...
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7242334 |
Wireless receiver circuit with merged ADC and filter
A CMOS hybrid analog-digital receiver core where filtering and gain functions are implemented in the digital domain. The analog portion of the receiver core includes standard circuits such as a low...
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7242708 |
Equalized parallel interference cancellation EPIC for CDMA systems
A new multiuser detection scheme EPIC (Equalized Parallel Interference Cancellation) is disclosed. A rake receiver signal zRake output by a rake receiver is detected, which receives a spread...
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7239431 |
System and method for recovering primary channel operation in a facsimile receiver and facsimile machine incorporating the same
A system for, and method of recovering primary channel operation in a facsimile (fax) receiver and a fax machine that incorporates the system, the method or both. In one embodiment, the system...
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7239673 |
Optical reception apparatus
An optical receiver includes a soft-decision deciding unit ( 7 ) for deciding an electric received signal according to a plurality of decision levels to output a multivalued decision signal, a...
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7239660 |
Adaptive filter with GSPT LMS algorithm for reducing complexity
A linear/non-linear adaptive filter for transforming an input signal to an output signal. The present invention also includes a novel GSPT LMS algorithm for significantly reducing complexity. The...
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7239672 |
Channel estimator for WLAN
A channel estimator for use in wireless local area networks (WLAN's), characterized in that a channel estimation controller with a simplified recursive least square (RLS) algorithm and a...
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7236533 |
Method and apparatus for reducing ratio of peak power to average power of multi-carrier signals
A method and apparatus for reducing a ratio of peak power to average power of multi-carrier signals are provided. The apparatus and method include the steps of: after modulating the multi-carrier...
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7236544 |
Enhanced preamble to enable low power detection
System and method for enabling the low power detection of a transmitted sequence. A preferred embodiment comprises the replacement of a portion of a preamble (after the application of any needed...
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7233629 |
Adjusting a receiver
The invention relates to a method for adjusting IQ-imbalance of a direct conversion receiver ( 200 ). In the method a radio frequency training signal is locally generating and conveyed to an...
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7233614 |
CDMA receiving apparatus and method
The present invention provides a CDMA receiving apparatus capable of corresponding to the service types of data and system conditions flexibly and efficiently, so as to achieve such processing for...
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7230999 |
Method for extended coherent data demodulation for GPS receivers
A method of performing data detection for a global positioning system (GPS) receiver is disclosed. The method includes receiving a first in-phase (I) reference signal during a first time interval...
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7230995 |
Interleaver pattern modification
The invention provides a method of interleaving a source data stream using an interleaver pattern in a transmitter. A mother interleaver pattern and an interleaver parameter are accessed. The...
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7227478 |
Sample rate converter with selectable sampling rate and timing reference
A sample rate converter includes an up-conversion module, a linear interpolator module, and a parameter control module. The up-conversion module is operable to convert a first data rate to a second...
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7227910 |
Communication device with configurable sigma-delta modulator
In up-to date communication devices an intermediate frequency signal is generated at first in a digital way and than is converted to an analogue signal by a digital-to-analogue converter ( 10 ). In...
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7227912 |
Receiver with mirror frequency suppression
Receiver comprising an RF front end circuit for a selection and conversion of an RF input signal into a pair of quadrature IF (intermediate frequency) signals being supplied through in-phase and...
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7227911 |
Multichannel receiver for simultaneously receiving a plurality of different channel signals
A multichannel receiver for effectively receiving multichannel signals at the same time without any restrictions in the symbol timing and channel interval of modulated signals. A quadrature...
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7224750 |
Apparatus and method for receiving RF signal free of 1/f noise in radio communication system
An apparatus and method for receiving RF signals in a RF communication system are provided. The apparatus for receiving RF signals comprises a pre-processing unit for bandpass-filtering a signal...
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7224749 |
Method and apparatus for reducing re-radiation using techniques of universal frequency translation technology
Methods, systems, and apparatuses for down-converting an electromagnetic (EM) signal by aliasing the EM signal, and applications thereof are described herein. Reducing or eliminating DC offset...
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7221716 |
Signal receiving apparatus and method adapted for use with a time-variant channel
In a communication system, an apparatus for receiving a signal transmitted through a channel having time-varying characteristics and for restoring original user information included in the received...
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7218667 |
Radio reception apparatus and radio reception method
The PL signal of a PL portion is multiplied by gain factor βc in a multiplier( 109 ) and the data of a data portion is multiplied by gain factor βd in a multiplier( 110 ). These gain factors βc...
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7218688 |
Data slicer
Data of the packet header is digitalized by a slicer circuit of a floating slice level mode, which follows DC voltage fluctuation, and packet data other than the packet header is digitalized by a...
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7218678 |
Digital data transmitter
A digital data transmission apparatus includes a transmitting end ( 100 ) that includes: a binary/quadrary conversion unit ( 110 ) for converting a data stream; a coding unit ( 120 ) for mapping...
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7218685 |
Direct conversion receiver
To solve such a problem of a conventional direct conversion receiver that an image rejection ratio is insufficient owing to analog processing employed to reject an image, the present invention...
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7215703 |
Digital calculation received signal strength indication
Digital calculation of an RSSI value begins by digitally calculating a magnitude of a signal (e.g., a received RF signal or representation thereof). The process then continues by filtering the...
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7212749 |
Signal receiver having wide band amplification capability
An Improved Signal Receiver Having Wide Band Amplification Capability is disclosed. Also disclosed is a receiver that is able to receive and reliably amplify infrared and/or other wireless signals...
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7209526 |
Apparatus and method for detecting I/Q channel imbalance in direct conversion digital quadrature transmission system
An apparatus and a method for detecting imbalances between an I-channel signal and a Q-channel signal in order to suppress a spurious signal in a direct conversion digital quadrature transmission...
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7209523 |
Ultra-wideband receiver and transmitter
A waveform-adaptive ultra-wideband (UWB) transmitter and noise-tracking UWB receiver for use in communications, object detection and radar applications. In one embodiment, the output of an...
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7209513 |
Phase, frequency and gain characterization and mitigation in SCDMA burst receiver using multi-pass processing
A method and apparatus provide phase, frequency and gain characterization and mitigation in a synchronized code division multiple access (SCDMA) burst receiver via use of dedicated phase and...
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7206358 |
Error recovery apparatus of digital broadcasting receiver to compensate a phase-error generated by a broadcasting signal transmitted through a multi-path channel
An error recovery apparatus and method of a digital broadcasting receiver includes an analog-to-digital converting (ADC) unit, a splitter, a sampling distortion compensation unit, a phase error...
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7206359 |
System and method for orthogonally multiplexed signal transmission and reception
A wireless communication network that implements Circular Simplex Turbo Block Coded Modulation (“CSTBCM”) Forward Error Correction (“FEC”), randomization and Wavelet Packet Modulation...
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7203246 |
Method of estimating a channel, and a radio system
The invention relates to a method of estimating a downlink channel in a radio system, and to a radio system. The method includes transmitting a common pilot signal and a user-specific pilot signal,...
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7203488 |
Flexible software radio transceiver
A method and apparatus is disclosed for receiving a wireless wideband signal and transmitting a converted signal to a transmitting unit. The transmitting unit may or not be wireless. The apparatus...
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7203257 |
Best linear unbiased channel estimation for frequency selective multipath channels with long delay spreads
A channel impulse response for a channel is determined by determining an initial channel impulse response estimate based upon a stored training sequence and a received signal, by thresholding the...
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7203251 |
Apparatus for compensating phase of receiver and method thereof
The present invention provides an apparatus for compensating a phase difference of a receiver, the apparatus including: an accumulating unit for accumulating a radio frequency (RF) input signal and...
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7203250 |
Frequency analysis method and apparatus, and spectrum spreading demodulation method and apparatus
A method for performing frequency analysis by executing discrete Fourier transform with a smaller capacity of a memory than in usual FFT processing, without reducing the frequency resolution....
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7200169 |
DSL modem apparatus and initialization method for DSL communication
An ADSL modem apparatus including an IFFT unit that performs an inverse fast Fourier transform on transmission data, an FFT unit that performs a fast Fourier transform on reception data, and a...
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7200185 |
Star receiver burst processing
Architecture for processing a record of burst information in a transmission link. A waveform sampler samples a received waveform containing a record of symbols imposed on a carrier signal. Symbol...
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7200187 |
Modulator for digital amplifier
A digital modulator for driving a digital amplifier. The digital modulator has a subtractor which receives a digital input signal. A filter amplifier receives the output of the filter amplifier and...
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7200186 |
Methods and apparatus for reducing power usage of a transmitter and receiver coupled via a differential serial data link
Methods and apparatus are disclosed for using in-band signal(s) over a differential serial data link to reduce power usage of a transmitter and receiver coupled by the link.
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7200166 |
Dual-mode transceiver for indoor and outdoor ultra wideband communications
A dual-mode ultra wideband (UWB) communication transceiver is presented to implement two disparate systems for indoor and outdoor UWB operations. During an operation mode, the dual-mode UWB...
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7197089 |
Frequency plan for GPS receiver
The present invention provides a GPS receiver having a unique frequency plan, thereby eliminating interference due to internally generated frequencies. In general, the GPS receiver has...
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7197088 |
Digital broadcast receiving system
A second is counted at a step S 11 , and an information table is read at a step S 12 . Content change of the information table is checked at a step S 13 . The content change is checked by checking...
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7197094 |
Symbol-based decision feedback equalizer (DFE) with maximum likelihood sequence estimation for wireless receivers under multipath channels
A maximum likelihood sequence estimator (MLSE) sub-receiver is disclosed, in one embodiment of the present invention and includes an MLSE equalizer device responsive to input data to generate...
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7197083 |
Creation of spectral windows through the use of high rate code words
An apparatus to process a data word includes an encoder to receive and encode the data word, wherein a power spectral density of an encoded word is lowered across a specific frequency band relative...
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7194018 |
Apparatus for searching multipath in spread spectrum communications system and method thereof
A multipath searching device includes a radio front-end for converting a received radio signal into a baseband signal and for outputting the baseband signal. A profile calculating unit is included...
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7194049 |
Digital automatic level control system
A digital automatic level control system employs delay elements, which enable information about a signal parameter from the past, present and future to be processed to provide an optimal gain that...
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