|
Match
|
Document |
Document Title |
|
|
7529289 |
Signal processing under attenuated transmission conditions
Signal processing under attenuated transmission conditions. Within an orthogonal signal space, the number of orthogonal signals that are used to transmit information from a transmitter to a...
|
|
|
7529306 |
Estimation of asymmetries between inphase and quadrature branches in multicarrier transmission systems
Distortions of radio signals transmitted in data blocks in an OFDM method, the distortions being caused by IQ asymmetries, can be estimated and subsequently equalized by means of specific reference...
|
|
|
7526039 |
Method for deciding signal detection order in mobile communication system
Disclosed is a method for deciding a signal detection order in a mobile communication system that supports an adaptive modulation technology. The detection order that maximizes a channel, in which...
|
|
|
7526035 |
Apparatus and method for switching between an AMC mode and a diversity mode in a broadband wireless communication system
An apparatus and method for switching between an AMC mode and a diversity mode adaptively according to a channel environment in a broadband wireless communication system are provided. According to...
|
|
|
7526036 |
System and method for transmitting signals in cooperative base station multi-user mimo networks
A method transmits and receives signals in a cooperative, multi-user, multi-input, multi-output network. The network includes base stations (BSs) and mobile stations (MSs). Each BS has at least two...
|
|
|
7526037 |
Reduced complexity detector for multiple-antenna systems
A reduced-complexity maximum-likelihood detector is disclosed that provides a high degree of signal detection accuracy while maintaining high processing speeds. The detector processes the received...
|
|
|
7526042 |
OFDM system receiver apparatus suppressing inter-symbol interference
An OFDM receiver includes an inter-symbol interference suppressing unit to modify to a predetermined content a portion of a dominant wave included in a received signal and a predetermined content a...
|
|
|
7522514 |
Systems and methods for high rate OFDM communications
Messages transmitted between a receiver and a transmitter are used to maximize a communication data rate. In particular, a multicarrier modulation system uses messages that are sent from the...
|
|
|
7522562 |
Method and system for channel estimation in a spatial multiplexing MIMO system
Aspects of a method and system for channel estimation in a SM MIMO communication system may comprise receiving a plurality of spatially multiplexed communication signals from a plurality of...
|
|
|
7522672 |
Digital branch calibrator for an RF transmitter
The present invention provides a digital (computational) branch calibrator which uses a feedback signal sensed from an RF transmit signal path following the combining stage of LINC circuitry of a...
|
|
|
7522674 |
Linearly independent preambles for MIMO channel estimation with backward compatibility
A device and a method of characterizing a communications channel. The method includes transmitting a first part of a packet preamble using two or more antennas and transmitting a second part of the...
|
|
|
7519125 |
Multicarrier receiver and methods of generating spatial correlation estimates for signals received with a plurality of antennas
In a multicarrier receiver, spatial correlation estimates are enhanced by multiplying by weighting values generated from a channel length estimate. The channel length estimate is calculated from a...
|
|
|
7519132 |
Reduced complexity multicarrier precoder
A reduced complexity precoder provides an efficient method and structure to precode a vector-signal-point sequence for transmission through a band-limited channel. The precoder enables a...
|
|
|
7519122 |
OFDM reception apparatus and OFDM reception method
Precision of channel estimation is improved. An OFDM reception apparatus for receiving and demodulating an OFDM signal which transmits a pilot signal, comprises a channel estimation section for...
|
|
|
7519123 |
Spectral shaping for multiband OFDM transmitters with time spreading
A method of shaping an orthogonal frequency division multiplexing (OFDM) signal spectrum of a transmitted signal is disclosed. An input signal including an input component is received and a first...
|
|
|
7519124 |
Method for seamless bit rate adaptation for multicarrier DSL
A method of mitigating transmission delay fluctuations in a communication system having a variable data rate and block-oriented subsystems, such as interleavers. The method comprises interspersing...
|
|
|
7519121 |
OFDM demodulation circuit and OFDM reception apparatus using the same
An OFDM demodulation circuit capable of initiating a demodulation process within a short period of time after the reception of a signal and terminating the demodulation early if it has been...
|
|
|
7519383 |
Method for efficient calibration of EVM using compression characteristics
A method for estimating and measuring error vector magnitude (EVM) is provided by correlating a transmitter compression level to an EVM.
|
|
|
7515641 |
Apparatus and method for processing ranging channel in orthogonal frequency division multiple access system
Disclosed is an apparatus and method for processing a ranging channel in an OFDMA system. The apparatus converts received ranging complex signals to polar coordinate signals having a signal...
|
|
|
7515892 |
Base station antenna system and method for estimating mobile station direction in wireless communication system
Disclosed is an operation method of a base station antenna system, which includes receiving signals from at least two antennas to which a mono-pulse scheme has been applied; operating sum channel...
|
|
|
7515640 |
Systems and methods for communicating in a discrete multitone system
A system for communicating in a discrete multitone system includes a transmitting station and a receiving station. The transmitting station transmits redundant sets of data on each of a number of...
|
|
|
7515875 |
Multi-carrier communication apparatus
A multi-carrier communications apparatus which communicates between a first station and a second station as a destination station using a reference signal used for estimating a state of a channel,...
|
|
|
7515655 |
Wireless communication apparatus and wireless communication method
Disclosed is a wireless communication apparatus which receives, by multiple antennas, signals created by spatially multiplexing multiple transmit streams subjected to power allocation. The wireless...
|
|
|
7512185 |
Dual carrier modulator for a multiband OFDM UWB transceiver
A Dual Carrier Modulator (DCM) for a Multiband OFDM (Orthogonal Frequency Division Multiplexing) Transceiver of a Ultra Wide Band (UWB) wireless personal access network transmitting OFDM modulated...
|
|
|
7512184 |
Receiver and reception method with channel estimation using smoothing and decimation fast fourier transform (FFT)
A receiver performs an inverse Fast Fourier Transform (FFT) on a plurality of carriers to receive an Orthogonal Frequency Division Multiplexing (OFDM) signal to be transmitted by converting a...
|
|
|
7512149 |
Bit and power allocation scheme for full-duplex transmission with echo cancellation in multicarrier-based modems
The present invention provides a method, data modulator, modem, computer readable medium and system for allocating bits to sub-carriers of data channel frequencies for spectrally efficient...
|
|
|
7512186 |
Rate adaptation and parameter optimization for multi-band single carrier transmission
A method for enhancing the bit rate and/or margin at which quadrature amplitude modulation (QAM) communication is performed over multiple bands of a communication link includes the steps of varying...
|
|
|
7512412 |
Power control and overlapping control for a quasi-orthogonal communication system
Techniques for controlling transmit power and the amount of overlapping in a quasi-orthogonal system are described. A base station for a sector receives transmissions from terminals in that sector...
|
|
|
7508808 |
Frequency-division multiplexing system and method for communication having enhanced reliability in fading environments
Frequency-division multiplexing and demultiplexing systems and methods for use with M transmit and N receive antennas, M equaling at least two. In one embodiment, a frequency-division multiplexing...
|
|
|
7508879 |
UWB telecommunication system and communication device to be used therein
A system to transmit data in the form of at least one pulse sequence modulated by symbol encoding units. The symbol encoding units include a plurality of signal encoders (ENCi) connected to a...
|
|
|
7508875 |
Correlation matrix estimation via adaptive array perturbational processing to enable jammer location
Prior adaptive antenna systems can reduce effects of a jamming or interfering signal by reducing antenna gain in the direction of such signal. However, direction finding capability to enable...
|
|
|
7508846 |
Physical capacity aggregation system and method
Provided is a method and apparatus for segmenting packets into cells of variable sizes in order to facilitate the parallel transport of data symbols common to a single packet through a composite...
|
|
|
7508876 |
Fast initialization using seamless rate adaptation
A method for initializing modems in a multicarrier transmission system to establish a communication link between the transmitter and the receiver. An exemplary embodiment includes the steps of...
|
|
|
7509103 |
Digital radio broadcasting receiver and method of receiving digital radio broadcasting
A digital radio broadcasting receiver capable of automatically setting an audio field of reproduced sound in response to a musical genre of an ongoing broadcasting composition is disclosed. Digital...
|
|
|
7505506 |
System and method for generating single sideband, constant envelope, spread spectrum signals with multiple spreading codes
A method of generating a composite signal includes the steps of: (a) generating a plurality of sub-carriers, each sub-carrier having a different frequency position in a frequency spectrum; (b)...
|
|
|
7505524 |
Receiver device and communication system
A communication system that sends and receives signals via each of two adjacent channels ch 1 and ch 2 in which interchannel interference exists, wherein the receiver device comprises a soft...
|
|
|
7505523 |
Integer frequency offset estimation based on the maximum likelihood principal in OFDM systems
A receiver in an OFDM system may include a maximum likelihood (ML) estimator that estimates the integer part of the carrier frequency offset. The estimator may operate with or without pilot...
|
|
|
7505536 |
Energy dispersal circuit and receiver
An energy dispersal circuit, which generates a PRBS (Pseudo Random Binary Sequence) and executes an XOR (exclusive-OR) operation with respect to a data signal and the PRBS based on a bit, includes...
|
|
|
7505522 |
Spectral shaping in multiband OFDM transmitter with clipping
A method of shaping an orthogonal frequency division multiplexing (OFDM) signal spectrum is disclosed. The method comprises receiving an input signal that has a frequency spectrum that includes a...
|
|
|
7499504 |
Method for determining multiple-input multiple-output (MIMO) channel coefficient using polarity-inverted training signals in an orthogonal frequency division multiplexed (OFDM) multicarrier system
Embodiments of system and method for determining channel coefficients in a wireless network are generally described herein. Other embodiments may be described and claimed. In some embodiments,...
|
|
|
7499496 |
Transmitter and transmission controlling method
An OFDM transmitter ( 100 ) is disclosed. The OFDM transmitter comprises: a sorter ( 103 - 1 ) for sorting plural input complex signals and partitioning them into plural groups; plural IFFTs ( 103...
|
|
|
7499497 |
Impulse suppression apparatus applied in OFDM system and related method thereof
An impulse suppression apparatus and method applied in an OFDM system for suppressing the impulse noise of a first time-domain signal are disclosed. The impulse suppression apparatus includes a...
|
|
|
7499672 |
Wireless communication system
A leaky coaxial cable is arranged to meander on a ceiling of an indoor space where a wireless LAN is to be worked. One end of the leaky coaxial cable is connected to a wireless base station unit...
|
|
|
7496028 |
Apparatus and method for minimizing PAPR in an OFDM communication system
A signal transmission apparatus for minimizing a PAPR in an OFDM communication system. A subband divider divides L information data subcarrier signals into M subband signals. An additional...
|
|
|
7496145 |
Method and apparatus for reducing transmitter peak power requirements with orthogonal code noise shaping
A method and apparatus for reducing peak transmitter power includes providing a set of orthogonal communication codes for a telecommunications system that includes a set of active user codes and a...
|
|
|
7496335 |
Mobile terminal apparatus and channel compensation method of the same
A mobile terminal apparatus includes a channel compensation processor configured to carry out a channel compensation process on a first channel reception signal using a channel estimation value...
|
|
|
7496144 |
Allocating data between tones in a VDSL system
A new protocol is proposed for transmission of data through lines such as telephone lines. The tones of a signal are associated into groups 10, 11, and tone ordering, gain selection, and/or bit...
|
|
|
7492828 |
Time synchronization using spectral estimation in a communication system
To perform time synchronization using spectral estimation, a receiver obtains a frequency response estimate for pilot symbols received on each set of frequency subbands used for pilot transmission....
|
|
|
7492830 |
Signal receiving method in MIMO system and device therefor
Transmitted symbols are estimated from received signals. The likelihood of the estimated transmitted symbols is calculated. The mean value and variance of the transmitted symbols are calculated...
|
|
|
7492814 |
Method of removing noise and interference from signal using peak picking
Removing noise and interference from a signal by calculating a joint time-frequency domain of the signal, estimating instantaneous frequencies of the joint time-frequency domain, modifying each...
|