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Method for using a symbol mapper using a symbol mapping scheme to generate
modulation symbols according to a...
The invention relates to method and apparatus for generating modulation symbols according to a second symbol mapping scheme by a symbol mapping unit being...
Multi-value modulation/demodulation method and multi-value
N (integer equal to or above 3) quaternary phase shift keying (QPSK) outputs having different amplitude levels, i.e., r2=r1.times.2.sup.-(i-1), i=2 . . . N with...
Digital compensation for nonlinearities in a polar transmitter
A polar transmitter includes a digital processor coupled to receive a complex modulated digital signal and a feedback signal produced from the complex modulated...
Radio transmitting apparatus and radio transmitting method
A radio transmitting apparatus and method thereof wherein a guard interval (GI) having a variable length allows a radio receiving apparatus to precisely and...
Antenna grouping and group-based enhancements for MIMO systems
Embodiments of the present disclosure provide a transmitter, a receiver and methods of operating a transmitter and a receiver. In one embodiment, the...
Method and apparatus for multi-user multi-input multi-output transmission
Embodiments of the present invention relate to methods and systems of transmitting data signals from at least one transmitting terminal with a spatial diversity...
Data transmitting and receiving method using phase shift based precoding
and transceiver supporting the same
A method for performing a precoding based on a generalized phase shift or a precoding based on an extended phase shift in a Multi-Input Multi-Output (MIMO)...
Reference signaling scheme using compressed feedforward codebooks for
multi-user, multiple input, multiple...
A multi-user multiple input multiple output (MIMO) downlink beamforming system with limited feed forward (200) is provided to enable precoding matrix...
Power adaptive channel estimation for a multi-path receiving
A multi-path receiving system is provided. The multi-path receiving system includes a multi-path analyzer, a channel estimator and an equalizer. The multi-path...
Method for the coding of an OFDM/OQAM signal using symbols with complex
values, and corresponding signal,...
A method and apparatus are provided for coding an OFDM/OQAM-type multi-carrier signal formed by a temporal succession of symbols comprising a set of data...
Channel tracking with scattered pilots
According to the disclosure, a system adapted to estimate and track a channel for wireless orthogonal frequency division modulation (OFDM) communication is...
COFDM demodulator with an optimal FFT analysis window positioning
The invention relates to a method for the COFDM demodulation of a signal received from a transmission channel. The inventive method includes performing the fast...
Interpolation in channel state feedback
Feedback bandwidth may be reduced in a closed loop MIMO system by Householder transformations, vector quantization using codebooks, and down-sampling in the...
Transmitter identification information signal detection apparatus and
A transmitter identification information (TII) signal detection circuit is suitable for an orthogonal frequency division modulation system. A TII signal...
Adaptive radio/modulation apparatus, receiver apparatus, wireless
communication system, and wireless...
Adaptive modulation part (1) modulates a signal in a modulation scheme selected based on a modulation mode, switch (2) selects a radio scheme congenial to the...
Joint estimation apparatus of channel and frequency offset based on
multiband-orthogonal frequency division...
The present invention relates, in general, to a joint channel and frequency offset estimation apparatus and method based on a multi-band-orthogonal frequency...
Modulation and demodulation apparatuses and methods for wired/wireless
Wired/wireless optical signal modulation and demodulation apparatuses and methods using an intensity modulation/direct detection method and an orthogonal...
Nonlinear viterbi complexity reduction
System and methods for reducing the complexity or area of a non-linear Viterbi detector. In some embodiments, a Viterbi detector calculates branch metrics for a...
Apparatus and method for CINR estimation in a wireless communication
An apparatus and a method for estimating a Carrier to Interference and Noise Ratio (CINR) of an uplink channel in a wireless communication system are provided....
The channel estimation for a current data block is based on a previous data block, where the two data blocks are based on common information. Data symbol...
Transfer of digital data through a transformer
A method and a system for transferring a digital signal through a transformer, including a circuit for coding the digital signal to be transferred, having two...
Picture coding method and picture decoding method
A picture coding apparatus (300) is a picture coding apparatus that codes a difference between picture data (Img) representing an input picture and predictive...
Robust system for maintaining audio/video synchronization during playback
of multimedia streams with no...
An apparatus having a first circuit, a second circuit and a third circuit. The first circuit may be configured to (i) demultiplex a multimedia stream having one...
Apparatus and method for control of blocking noise suppressor
A decoding apparatus includes a decoder configured to receive a series of encoded pictures and to decode each of the encoded pictures to produce a series of...
Method for encoding/decoding signals with multiple descriptions vector and
The method for encoding and/or decoding video signals, includes the operations of generating at a transmitter side a multiple descriptions vector associated to...
Method and apparatus for determining search range for adaptive motion
vector for use in video encoder
The video encoder in accordance with the present invention divides input image signal into macro blocks, estimates motion vectors of each macro block and...
Method and apparatus for video encoding and decoding, and recording medium
having recorded thereon a program...
A video encoding method includes generating a primary error image by performing motion estimation and compensation on a current frame with reference to a...
Method of video content complexity estimation, scene change detection and
Methods of video content complexity estimation, scene change detection and video encoding are provided. The video content complexity estimation and the scene...
Signaling field type information
Techniques and tools for signaling of field type information for interlaced video frames are described. For example, a video decoder receives a code for an...
Method for encoding interlaced digital video data
Interlaced video can be encoded in two layers, base layer and enhancement layer. A method for optimizing the encoding of motion vectors for enhancement layer is...
Method and system for improving compressed image chroma information
Methods, systems, and computer programs for improving compressed image chroma information. In one aspect of the invention, a resolution for a red color...
Methods and systems for rate control in video encoder
A method of rate control in a video encoder includes performing a first encoding step to encode macroblocks of a current frame by utilizing a first quantization...
Interference suppression processing unit and a method of suppressing
interference in wireless data communication
The interference suppression processing unit includes N.sub.a.gtoreq.1 receiver paths to transmit respective N.sub.a.gtoreq.1 received data sequences received...
Electronic dispersion compensation utilizing interleaved architecture and
channel identification for assisting...
Embodiments include a system for performing dispersion compensation on an electromagnetic signal received over a communication channel, the electromagnetic...
Generated set top calibration patterns in manufacturing
Included are systems and methods for performing an internal operations test to a set top terminal (STT). At least one embodiment of a method includes creating a...
Noise-driven recovery of a digital pulse stream
Provided is a method and system for noise-driven recovery of a digital pulse stream. The method includes receiving initial parameters including the base...
Data-dependent jitter pre-emphasis for high-speed serial link transmitters
In the context of high-speed serial links, data-dependent jitter compensation techniques performed using phase pre-distortion. Broadly contemplated is an...
Signal processing apparatus, signal processing method, and program
A signal processing apparatus configured to process a signal transmitted via a transmission path where a waveform represented by a signal value of a particular...
Digital receiver device for DSSS-encoded signals
A device for decoding a direct sequence spread spectrum-encoded binary message includes a sampler that captures at least one sequence of binary samples...
Method and system for a delta quantizer for MIMO pre-coders with finite
rate channel state information feedback
Aspects of a method and system for a delta quantizer for MIMO pre-coders with finite rate channel state information feedback may comprise quantizing a change in...
Multipath interference-resistant receivers for closed-loop transmit
diversity (CLTD) in code-division multiple...
System and method for providing interference resistance in communications systems using closed-loop transmit diversity (CLTD). A preferred embodiment comprises:...
Weighted open loop power control transmitter
A weighted open loop power control transmitter for controlling transmission power levels using a spread spectrum time division duplex (TDD) technique having...
Optimized pulse pumped laser system using feedback
A laser system according to the invention comprises pump generating means (x02, x03) for generating at least a first and a second, preferably focused, pump...
High-gain diode-pumped laser amplifier
A laser amplifier includes a laser active slab with a source of pump power to amplify an input laser beam, the laser active slab including a block of laser...
Optoelectronic module with integrated monitoring photodiode array for a
parallel optical transmitter
A power monitoring system uses a low loss reflective element to partially split the output laser beams from an array of laser sources, in a parallel...
Wavelength tunable semiconductor laser device, controller for the same,
and control method for the same
An object is to provide a wavelength tunable semiconductor laser device, a controller for the same and a control method for the same, which prevent wavelength...
Integrated semiconductor laser device and method of fabricating the same
An integrated semiconductor laser device capable of improving the properties of a laser beam and reducing the cost for optical axis adjustment is provided. This...
System and method to regulate high current radiation sources
Disclosed is a high current radiation system. The system includes a high current radiation source to generate radiation and an analog circuit to generate,...
Method and system for controlling wavelengths of multi-path laser
A method for controlling wavelengths of a multi-path laser is provided. The method includes: obtaining a difference between an actual output wavelength and a...
Narrow surface corrugated grating
Narrow surface corrugated gratings for integrated optical components and their method of manufacture. An embodiment includes a grating having a width narrower...