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US20090305710 Super Economical Broadcast System and Method  
A super economical broadcast system and method are provided. The system includes a plurality of base transceiver stations that define a plurality of respective cells, each base transceiver station...
US20090296849 Communication Device and Transmission Calibration Weight Calculation Method  
A communication device according to the present invention includes a controller 10 configured to send a PN code (A) to a transmission and reception unit 20 - 1 and send a PN code (B) to a...
US20090291647 RADIO FREQUENCY COMMUNICATION DEVICES AND METHODS  
One embodiment relates to a circuit for efficient wireless communication. The circuit includes a communication port adapted to be coupled to an antenna feed. Multiple communication paths stem from...
US20090286486 TRANSMIT CHANNEL IN WIDEBAND HIGH FREQUENCY WIRELESS SYSTEM USING MULTIPLE TRANSMIT ANTENNA, AND METHOD THEREOF  
Disclosed are a transmitting device and receiving device for selecting a transmit channel in a wideband high frequency wireless system using a plurality of transmit antennas, and a method thereof....
US20090280755 RADIO FREQUENCY COMMUNICATION DEVICES AND METHODS  
One embodiment relates to a radio frequency (RF) communication device. The RF communication device includes a coupler having a plurality of ports and an adjustable termination coupled to one of the...
US20090279628 Transmission Power Control Method In Communication System Using Multiple Carriers And Radio Communication Device Using The Method  
A transmission power control method is employed in a communication system, which uses multiple carriers. A plurality of different modulation systems are allocated to a plurality of different...
US20090275296 Communication module with dual systems and method for defining operating mode thereof  
A communication module with dual systems for processing a first RF signal and a second RF signal that belong to different communication systems is provided. The communication module includes a...
US20090275352 CYCLIC DELAY DIVERSITY BASED TRANSMISSION WITH DELAY HOPPING  
A method of providing delay information in a multi-antenna transmission system is provided. A time delay value is selected from a set of time delay values. A mobile station is informed of...
US20090270052 APPARATUS AND METHOD FOR RADIO TRANSMISSION  
A radio transmission apparatus performs communications with high transmission efficiency. In this apparatus, a modulator modulates data and outputs to a first spreader. A second modulator modulates...
US20090270051 BEAMFORMER AND BEAMFORMING METHOD  
Disclosed are a beamformer and a beamforming method. The beamformer includes a plurality of dividers, each of which divides an input signal along a plurality of paths, an input switch which selects...
US20090264143 Mobile Device, Mobile Communication System and Antenna Verification Method  
A mobile device which can reduce an error rate in phase determination in antenna verification and intend to improve a reception performance is obtained. When a more likely phase difference is...
US20090262851 RADIO TRANSMITTING APPARATUS AND RADIO TRANSMITTING METHOD  
A radio transmitting apparatus and a radio transmitting method wherein the loss of transmission efficiency is suppressed to improve the reception quality of pilots received by a receiver apparatus....
US20090258609 RADIO TRANSMISSION APPARATUS AND RADIO TRANSMISSION METHOD  
Data streams stored in buffers are modulated by modulation sections. Multipliers multiply the signals output from the modulation sections by weights output from a weight control section, The...
US20090252257 MIMO TRANSMITTER AND METHOD FOR TRANSMITTING AN OFDM SYMBOL IN ACCORDANCE WITH AN IEEE 802.11 COMMUNICATION STANDARD OVER A PLURALITY OF SPATIAL CHANNELS  
A multiple-input-multiple output (MIMO) transmitter for transmitting an orthogonal frequency division multiplexed (OFDM) symbol over a plurality of spatial channels using a plurality of antennas is...
US20090239486 APPARATUS FOR ANTENNA DIVERSITY USING JOINT MAXIMAL RATIO COMBINING  
A method for improving performance of radio frequency (RF) communication of a station (STA) having an access point (AP) is disclosed. The method includes using an arbitrary set of transmit antenna...
US20090232245 MULTI-RESOLUTION BEAMFORMING BASED ON CODEBOOKS IN MIMO SYSTEMS  
Certain aspects of the present disclosure relate to methods for beamforming that achieve beamforming optimality criterions. Some proposed beamforming techniques are based on antenna directions with...
US20090233560 METHOD FOR TRANSMITTING DATA IN MULTIPLE ANTENNA SYSTEM  
A method for transmitting data in a multi-antenna system includes determining a candidate mode in which a maximum upperbound approximation of an average total data rate is maximized as a...
US20090227291 METHODS AND APPARATUS FOR USING ANTENNAS WITH DIFFERENT POLARIZATION AND SIGNAL TRANSMIT POWERS  
Method and apparatus related to implementing and/or utilizing different polarization antennas with different corresponding average transmit power levels are described. Inter-cell interference is...
US20090221241 SYSTEM, APPARATUS, AND METHOD FOR ASYMMETRICAL BEAMFORMING WITH EQUAL-POWER TRANSMISSIONS  
The present invention provides a plurality of embodiments for beamforming in an asymmetrical system wireless communication system ( 400 ) of N T ( 102 i ) transmit antennae and N R ( 104 j )...
US20090197546 MIMO TRANSMISSION WITH EXPLICIT AND IMPLICIT CYCLIC DELAYS  
Techniques for transmitting data using a combination of explicit cyclic delay and implicit cyclic delay are described. A transmitter may perform first processing for cyclic delay diversity (or...
US20090196245 VIRTUAL SCHEDULING IN HETEROGENEOUS NETWORKS  
Providing for virtual management of wireless resources in a mobile communication environment is described herein. By way of example, access terminals in the communication environment can maintain...
US20090190681 SPACE-TIME/SPACE-FREQUENCY CODING FOR MULTI-SITE AND MULTI-BEAM TRANSMISSION  
The present invention relates to space-time or space-frequency coding in cellular systems. The same data is transmitted from different antennas with different coverage areas, corresponding to...
US20090186585 Multi-mode wireless communication link  
A communication system includes first and second transmitters, which are coupled to transmit respective first and second Radio Frequency (RF) signals carrying first and second data over a wireless...
US20090186658 JOINT COMMUNICATION AND ELECTROMAGNETIC OPTIMIZATION OF A MULTIPLE-INPUT MULTIPLE-OUTPUT ULTRA WIDEBAND BASE STATION ANTENNA  
Recent work has shown that in nearly line-of-sight (LOS) Multiple-Input Multi-Output (MIMO) wireless communication systems, spacing antennas according to the symbol wavelength rather than the...
US20090176462 WIDE DYNAMIC RANGE OUT-PHASING ARRAY TRANSMITTER  
A novel out-phasing-array transmitter system and method are disclosed. The method is based on decomposing the input signal into an array of signals to drive a general, multiple paths...
US20090176463 METHOD AND APPARATUS FOR CONVEYING ANTENNA CONFIGURATION INFORMATION  
A method, apparatus and computer program product are provided for conveying information regarding the antenna configuration and/or the transmission diversity scheme to a recipient, such as a mobile...
US20090163153 Wireless Communication System, Wireless Communication Apparatus, Amplification Factor Determination Method, and Storage Medium  
The back-off of an AGC diversion section can be appropriately controlled. A base station apparatus ( 10 ) includes an amplifying part ( 12 ) for receiving a first transmission signal, which is...
US20090156140 TRANSMISSION AND/OR RECEPTION PROCESS WITH HIGH CHANNEL CAPACITY, TRANSMITTER AND/OR RECEIVER, AND MOBILE TERMINAL  
A transmission and/or reception process with high channel capacity uses a multiple transmitter and/or receiver system, and signal processing undergoes phases of temporary switching-off. Also...
US20090149139 SYSTEM, APPARATUS AND METHOD FOR INTRODUCING ANTENNA PATTERN VARIABILITY  
A device, system, and method for providing a transmit diversity device have a first antenna and a second antenna. The first antenna may have a first power transmission gain pattern, which may be...
US20090141824 METHOD AND SYSTEM FOR GENERATING CANDIDATE BEAMFORMING COEEFICIENTS FOR TRANSMISSION OF DATA OVER A WIRELESS MEDIUM  
A method and system for generating a number of candidate beamforming vectors for transmission of data over a wireless medium, is provided. One implementation involves determining the number (N) of...
US20090135940 WIRELESS TRANSMISSION DEVICE AND WIRELESS TRANSMISSION METHOD  
A wireless transmission device of the present invention includes n (where n is an integer of two or more) transmission antennas and a delay imparting section for delaying transmission signals...
US20090124210 RADIO TRANSMITTING APPARATUS, RADIO RECEIVING APPARATUS, WIRELESS COMMUNICATION METHOD, AND WIRELESS COMMUNICATION SYSTEM  
A radio transmitting apparatus, a radio receiving apparatus, a wireless communication method and a wireless communication system wherein even when a channel correlation is large, the channel...
US20090117859 SYSTEM AND METHOD FOR FREQUENCY OFFSETTING OF INFORMATION COMMUNICATED IN MIMO BASED WIRELESS NETWORKS  
A communications system includes a multiple-input/multiple-output architecture, which has a plurality of radio frequency chains. One of the plurality of radio frequency chains is configured to...
US20090117862 METHOD FOR THE MULTI-ANTENNA TRANSMISSION OF A LINEARLY-PRECODED SIGNAL, CORRESPONDING DEVICES, SIGNAL AND RECEPTION METHOD  
An embodiment of invention relates to a method for the transmission of a signal formed by vectors, each vector comprising N source symbols to be transmitted, using M transmission antennas, wherein...
US20090104908 WIRELESS COMMUNICATION BASE STATION APPARATUS AND WIRELESS COMMUNICATION METHOD  
A wireless communication base station apparatus that can raise the usage efficiency of the frequency resources of the whole system in a multicarrier transmission. In this apparatus, a separating...
US20090098838 BEAMFORMED MULTI-INPUT MULTIPLE-OUTPUT COMMUNICATION WITH UPLINK TRANSMISSION ROTATION  
Techniques are provided to enable computation of beamforming weights for beamforming MIMO wireless communication between first and second wireless communication devices. At the first device...
US20090093221 METHOD AND APPARATUS FOR SIGNALING INTERFERENCE INFORMATION FOR MULTI-USER MIMO  
A method and apparatus for signaling interference information in a multi-user multiple-input multiple-output (MU-MIMO) system including a plurality of wireless transmit/receive units (WTRUs) and a...
US20090088090 OMNI-DIRECTIONAL AND LOW-CORRELATED PRE-CODING BROADCAST BEAMFORMING  
Techniques are provided herein to compute beamforming weight vectors for pre-coding broadcast signals. First, system parameters for a device configured to wirelessly transmit one or more broadcast...
US20090088089 CONTROL CHANNEL NEGOTIATED INTERMITTENT WIRELESS COMMUNICATION  
A dual mode communication device utilizes a control channel to exploit diversity, history, and context in advance of establishing a broadband data exchange session on a broadband but shorter range...
US20090075606 VERTICAL MULTIPLE-INPUT MULTIPLE-OUTPUT WIRELESS ANTENNAS  
High gain, multi-pattern multiple-input multiple-output (MIMO) antenna systems are disclosed. These systems provide for multiple-polarization and omnidirectional coverage using multiple radios,...
US20090054015 MULTI-INPUT MULTI-OUTPUT COMMUNICATION SYSTEM, TRANSMITTER, AND METHOD OF ASSIGNING RESOURCES THEREIN  
Transmitter ( 101 ) extracts CQI values representative of reception qualities measured by and transmitted from receivers ( 102 - 1 through 102 -β) as representing reception states of antennas (...
US20090054014 Transmitter and Transmitting Method Thereof In Wireless Communication System  
A transmitter and a transmitting method of a wireless communication system are provided. The transmitter transmits RF signals using an outphasing scheme of converting one analog IF NC-EMS into two...
US20090046800 FEEDBACK AND RATE ADAPTATION FOR MIMO TRANSMISSION IN A TIME DIVISION DUPLEXED (TDD) COMMUNICATION SYSTEM  
Techniques for sending a MIMO transmission in a wireless communication system are described. In one design, a transmitter sends a first reference signal to a receiver. The receiver selects a...
US20090047999 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 communication channel matrix is...
US20090046806 WIRELESS COMMUNICATION METHOD IN MULTIANTENNA COMMUNICATION SYSTEM  
A wireless communication method in which use of the HERQ technique brings about an improved throughput of data transmission. In this method, if the number of retransmissions n is equal or below an...
US20090042519 TRANSMISSION DEVICE AND TRANSMISSION METHOD  
There is provided a transmission device capable of preventing increase of retransmission information or encoding redundant bit and improving a throughput in a MIMO communication method. In this...
US20090011722 METHODS AND APPARATUS FOR WIRELESSLY COMMUNICATING SIGNALS THAT INCLUDE EMBEDDED SYNCHRONIZATION/PILOT SEQUENCES  
An embodiment for wirelessly communicating a signal includes a transmitter combining a plurality of phase shifted input data signals with a plurality of synchronization/pilot sequences to produce a...
US20080311858 Diversity transmission using a single power amplifier  
Diversity radio transmission is accomplished with excellent performance using multiple antennas receiving a transmission signal from a single power amplifier. A data signal to be transmitted is...
US20080311863 Radio Communication Device and Radio Communication Method  
A radio communication device capable of lightening the influence of a frequency selective fading in the wide-band transmission of a single carrier thereby to prevent deterioration of error rate...
US20080292019 HARDWARE IMPLEMENTATION OF SPACE-TIME BLOCK CODES  
The present invention is related to a circuit for encoding at least two input symbols by means of a space-time block code, comprising a plurality of multiplexers, each arranged to receive...
Matches 1 - 50 out of 99 1 2 >