Matches 1 - 50 out of 66 1 2 >


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US20140079155 SYSTEM AND METHOD FOR SUPPORTING MULTIPLE REVERSE LINK DATA STREAMS  
A method for wireless communication includes determining a number of uplink data streams to transmit from a mobile device and determining a selection of antennas from a plurality of antennas for...
US20110194504 METHOD AND APPARATUS FOR SUPPORTING SINGLE-USER MULTIPLE-INPUT MULTIPLE-OUTPUT (SU-MIMO) AND MULTI-USER MIMO (MU-MIMO)  
Techniques for supporting data transmission with single-user multiple-input multiple-output (SU-MIMO) and multi-user MIMO (MU-MIMO) are described. A base station may transmit multiple data streams...
US20070243831 Wireless communication system  
A transmitting apparatus forms a plurality of transmission beams by using a plurality of antennas. Transmission beams, the correlation of which is low and the reception quality of which is high,...
US20060039489 Method and apparatus for providing closed-loop transmit precoding  
A method for providing closed-loop transmit precoding between a transmitter and a receiver, includes defining a codebook that includes a set of unitary rotation matrices. The receiver determines...
US20090074094 BEACON SYMBOLS WITH MULTIPLE ACTIVE SUBCARRIERS FOR WIRELESS COMMUNICATION  
Techniques for transmitting information using beacon symbols in a wireless communication system are described. In one design, a transmitter may map information to multiple subcarriers among a...
US20060093066 Apparatus and method for space-time-frequency block coding  
A transmitter for maximizing coding gain by transmitting an input symbol sequence through a plurality of transmit antennas method according to feedback CQIs from a receiver in a 3 Tx-rate 2...
US20060109932 OFDM pre-equalizing  
For example in case of an OFDM multicarrier transmission system the transmission characteristics of subcarriers of a multicarrier transmission system using a plurality of antenna elements (3, 3′)...
US20050265475 Spatial division multiplexing for MIMO devices  
A communications system, comprising a transmitter and a receiver, are operable to communicate information using a spatial multiplexing method. The transmitter is operable to separate data to be...
US20090110114 Open-Loop MIMO Scheme and Signaling Support for Wireless Networks  
Transmission with multiple antennas in a wireless network is performed by selecting between adaptive precoding and fixed precoding based on a selection criterion. Transmission using spatial...
US20080107204 SYSTEMS AND METHODS FOR A MULTICARRIER MODULATION SYSTEM WITH A VARIABLE MARGIN  
A multicarrier modem has a plurality of carriers over which data is transmitted. By assigning, for example, one or more different margins to the individual carriers the data rate and impairment...
US20060093058 Multiple list link adaptation  
The present invention relates to link adaptation in wireless communication, and in particular though not exclusively to wireless local area networks (WLAN). The present invention provides a link...
US20060009168 Method for controlling transmissions using both diversity and nondiversity transmission schemes  
A wireless communications system is provided in which transmissions may be made in either a diversity mode or a non-diversity mode on a slot by slot basis. When transmitting in the diversity mode,...
US20060109931 Mobile communication receiver and transmitter  
A receiver for mobile communication includes a wireless scheme parameter storing unit (23) configured to store a plurality of characteristics of multiple wireless schemes, a wireless scheme...
US20050213682 Apparatus and method for transmitting and receiving data in a mobile communication system using an array antenna  
An apparatus and a method for transmitting and receiving data in a mobile communication system including an array antenna. The method includes the steps of transmitting pilot channels through a...
US20090022242 SYSTEMS AND METHODS FOR INCREASED DATA RATE MODES USING MULTIPLE ENCODERS/DECODERS  
Systems and methods for providing for increased data rate modes using multiple encoders and decoders, comprising a transmitter comprising multiple encoders, wherein at least one of the encoders...
US20070189416 Apparatus and method for Orthogonal Spatial Multiplexing in a closed-loop MIMO-OFDM system  
An Orthogonal Spatial Multiplexing (OSM) apparatus and method in a closed-loop Multiple Input Multiple Output-Orthogonal Frequency Division Multiplexing (MIMO-OFDM) system are provided. In the OSM...
US20050265477 Wireless transmission method and wireless transmitter having a plurality of antennas  
In a wireless transmission method and wireless transmitter using a plurality of antennas at least in signal transmission, a process requiring a high immediateness is enabled to implement at the...
US20070183533 MIMO system with spatial diversity  
A method of transmitting a wireless signal (FIGS. 2 and 3A) is disclosed. A data stream (DATA) is received at a first transmitter (210). The data stream is also received by a second transmitter...
US20060140303 Wireless communication method and apparatus  
In transmitting a wireless packet signal for channel response estimation, after AGC preambles and channel estimation preambles are transmitted by using a plurality of antennas, at least one data...
US20060056540 Dynamic pilot subcarrier and data subcarrier indexing structure for wireless MIMO communication systems  
The present invention provides a subcarrier index coordinator for use with a multiple-input, multiple-output (MIMO) transmitter having N transmit antennas, N being at least two, wherein each...
US20100246717 INTERLEAVING IN A WIRELESS COMMUNICATION SYSTEM  
The method and apparatus in accordance with the present invention receives bits, writes the bits row-by-row in a matrix, reads the bits column-by-column from the matrix, groups and rotates the...
US20050220215 Radio transmitting apparatus provided with transmitters and transmitting antennas  
A radio transmitting apparatus with a plurality of transmission units comprises a calculation unit configured to calculate, based on a data length of a transmission signal including a control...
US20090262858 CONSTELLATION REARRANGEMENT FOR ARQ TRANSMIT DIVERSITY SCHEMES  
An ARQ (re-) transmission method of transmitting data in a wireless communication system wherein data packets are transmitted from a transmitter to a receiver, using a first transmission and a...
US20070217546 TRANSMISSION SIGNALS, METHOD AND APPARATUS  
This invention relates to apparatus, methods, processor control code and signals for channel estimation in OFDM (Orthogonal Frequency Division Multiplexed) communication systems with a plurality...
US20150117277 DATA TRANSMISSION METHOD AND SYSTEM  
A data transmission method and system are provided. The data transmission method includes: transmitting, by a BBU, frequency domain data obtained by performing a multi-antenna MIMO coding, to a...
US20060039499 Apparatus and method for space-time block coding  
A space-time block coding apparatus and method for transmitting an input symbol sequence through a plurality of Tx antennas using a channel information from the receiver in order to improve the...
US20060034389 Wireless transmitting device and method  
A wireless transmitting device for use in communication with a wireless receiving device with a wireless packet, includes a plurality of antennas, and a signal generator to generate a signal for a...
US20060034385 Wireless communication apparatus and method for estimating number of antennas  
wireless communication apparatus (transmitter) including a plurality of antennas for transmitting a plurality of known symbol sequences and data symbols, transmits the known symbol sequences, each...
US20050213686 Reduced complexity transmit spatial waterpouring technique for multiple-input, multiple-output communication systems  
A waterpouring system and method for use with a multiple-input, multiple-output (MIMO) transmitter. In one embodiment, the waterpouring system includes an encoding decision subsystem that selects...
US20060198460 Link adaptation for high throughput multiple antenna WLAN systems  
A wireless device 148 that performs link adaptation is disclosed. The wireless device 148 comprises at least two antennas 101a, 120a and 101b, 120b, and a network interface logic operable to...
US20090129501 Optimal signaling and selection verification for transmit antenna selection with erroneous feedback  
A method is provided for receiving data at a receiver via a communication channel from a transmitter having at least two transmitter antennas, the method including: receiving (S204) a codebook...
US20090028263 MIMO COMMUNICATION APPARATUS AND DATA RETRANSMISSION METHOD  
A MIMO communication apparatus wherein HARQ technique is utilized, in a MIMO system, to simplify feedback information and hence reduce the amount of information to be transmitted, thereby saving...
US20100322349 METHOD FOR TRANSMITTING DATA USING CYCLIC DELAY DIVERSITY  
A method of transmitting data using cyclic delay in a multi-antenna system using a plurality of subcarriers is disclosed. Data is transmitted through a phase shift based precoding scheme enhanced...
US20090046807 Method and system for beamforming communication in wireless communication systems  
A method and system for beamforming communication in a wireless communication system that includes a wireless initiator and a wireless responder is provided. A channel matrix is estimated at the...
US20070147543 Extension of space-time block code for transmission with more than two transmit antennas  
An STBC encoding extension method for more than two transmit antennas, which provides higher diversity gains while keeping the same coding/decoding latency as in the two-transmit-antenna case of...
US20070263746 Feedback frame structure for subspace tracking precoding  
The specification and drawings present a new method, system, apparatus and software product for resolving a feedback frame structure for implementing subspace tracking precoding for a MIMO-OFDM...
US20080165892 Using the Preamble in an OFDM-Based Communications System to Indicate the Number of Guard Tones  
Indicating the number of guard tones on the preamble frames is described for an OFDM or ODFMA based wireless communication system. The information of the number of guard tones or the range of the...
US20060056538 Apparatus and method for transmitting data using full-diversity, full-rate STBC  
A data transmission apparatus and method using a full-diversity, full-rate STBC are provided. In the data transmission apparatus, a serial-to-parallel converter converts an input bit stream to...
US20090316807 METHOD AND APPARATUS FOR ACHIEVING TRANSMIT DIVERSITY AND SPATIAL MULTIPLEXING USING ANTENNA SELECTION BASED ON FEEDBACK INFORMATION  
A method of achieving transmit diversity in a wireless communication system is disclosed. The method comprises encoding and modulating data stream based on feedback information, demultiplexing...
US20100254489 CODE ENHANCED STAGGERCASTING  
A method and architecture for processing signal communications between an encoder and decoder operating according to the ATSC standard adapted for mobile handheld transmission is disclosed. The...
US20060182199 Apparatus and method for retransmitting data in a communication system  
A communication system includes a transmitter and a receiver. If there is information data to transmit to the receiver, the transmitter generates a first transmission frame by signal-mapping the...
US20060133535 Apparatus and method for linearizing adaptive array antenna system  
Disclosed is an apparatus and method for linearizing an adaptive array antenna system. The apparatus and method for linearizing an adaptive array antenna system uses an identical feedback path as...
US20150372724 METHOD AND APPARATUS FOR CONFIGURING COORDINATED MULTI-POINT MEASUREMENT SET  
Method and an apparatus for configuring a coordinated multi-point measurement set. An embodiment of the present invention provides a method at a neighboring base station side (26) for configuring...
US20060083332 Apparatus enabled for optimizing spectral efficiency of a wireless link  
An apparatus simultaneously transmits at least a first signal and a second signal. Each one of those signals comprises a data sequence and a training sequence. The apparatus is arranged to...
US20090034654 Dynamic multiplexing and de-multiplexing technique with enhanced synchronization  
A communication system having a first station and a second station in communication over a wireless communications link. The first station is operative during a communication session to assemble...
US20120327983 TRANSMITTER APPARATUS, TRANSMISSION METHOD AND TRANSMISSION SYSTEM  
There is a problem that if a transmitter apparatus having an adaptive modulation function is to be configured to divide data for transmission, the structure of the transmitter apparatus will be...
US20080232319 SYSTEM AND METHOD FOR TRANSMITTING/RECEIVING RESOURCE ALLOCATION INFORMATION IN A WIRELESS MOBILE COMMUNICATION SYSTEM  
A system for transmitting/receiving resource allocation information in a wireless mobile communication system is provided. A transmission apparatus allocates a data burst in a frame, the data...
US20090316829 METHOD AND SYSTEM FOR TRANSMIT DIVERSITY FOR CHIP-TO-CHIP COMMUNICATIONS  
Aspects of a method and system for transmit diversity for chip-to-chip communications may include transmitting a plurality of signals generated in accordance with a transmission diversity protocol...
US20070127592 Apparatus and method for transmitting/receiving a signal in a communication system  
An apparatus for transmitting a signal in a communication system includes: MT number of transmission antennas; a space-time encoder for generating MT number of transmission symbol streams by...
US20160218902 METHOD FOR TRANSMITTING BROADCASTING SIGNAL, METHOD FOR RECEIVING BROADCASTING SIGNAL, APPARATUS FOR TRANSMITTING BROADCASTING SIGNAL, AND APPARATUS FOR RECEIVING BROADCASTING SIGNAL  
The present invention provides a method for transmitting a broadcasting signal. The method for transmitting the broadcasting signal according to the present invention may comprise: an input...

Matches 1 - 50 out of 66 1 2 >