Patent application number | Description | Published |
20090175293 | METHOD AND SYSTEM FOR TRANSMITTING MESSAGES OVER A FORWARD LINK SIGNALING CHANNEL - A method and system for transmitting messages over an F-SCCH in wireless communication field are disclosed. The method includes the following steps: acquiring a transmission type according to a negotiation between a terminal and a network during a link initialization; configuring a bit number occupied by a message type of messages of the F-SCCH; communicating, by the network, messages with the terminal according to the configured bit number of the message type based on the determined transmission type. With the present invention, redundancy of channel configuration may be decreased, channel configuration of the conventional art is simplified, hence reducing resource occupancy and improving resource utilization of channels. | 07-09-2009 |
20090219181 | METHOD AND DEVICE FOR TRANSMITTING AND RECEIVING SIGNALS - The present invention relates to the field of wireless communications and discloses wireless signal transmission and reception methods and devices, thus more information can be transmitted via a fixed resource block. In the present invention, at the transmitter side, information for transmission is divided into an n-bit part and an m-bit part, the n-bit part being taken as information borne in a physical resource and a corresponding mapping mode is selected in accordance with the m-bit part; at the receiver side, a sequence carrying a received signal is de-mapped according to all possible mapping modes of the received signal and transmitted information is derived from an optimum signal sequence resulting from de-mapping and corresponding mapping mode. | 09-03-2009 |
20090262788 | METHOD AND DEVICE FOR FEEDING BACK AND RECEIVING DOWNLINK CHANNEL INFORMATION - A method and a device for feeding back and receiving downlink channel information are disclosed, whereby spectrum utilization ratio of downlink channel information feedback is enhanced. According to the present invention, a wireless terminal superposes an uplink user information sequence with spectrum-spread downlink channel information before transmission. A network side de-spreads a received signal before estimating the downlink channel information, and then detects the user information sequence after subtracting the estimated downlink channel information from the received signal. An orthogonal code can be employed to spread the spectrum of the downlink channel information. The wireless terminal and base station use a plurality of antennas for transmission and reception. | 10-22-2009 |
20100232528 | METHOD AND SYSTEM FOR DATA TRANSMISSION - A data transmission method, a communications system and related apparatuses are disclosed. The data transmission method includes the following steps: a transmitter obtains channel information corresponding to channels between the transmitter and several receivers; the transmitter obtains a control vector corresponding to a receiver according to the channel information; the transmitter modulates data to be transmitted by means of one-dimensional modulation to obtain modulated symbols; the transmitter processes the modulated symbols and the control vector to obtain transmitted data of each antenna; the transmitter transmits the transmitted data to the receiver; the receiver receives the transmitted data in a predetermined spatial direction of received symbol. The present invention also discloses a communications system and related apparatuses. | 09-16-2010 |
20100239043 | METHOD AND APPARATUS FOR DETECTING SIGNALS OF MULTI-INPUT MULTI-OUTPUT SYSTEM - The embodiments of the present invention disclose a method and an apparatus for detecting signals of a MIMO system, and relate to a MIMO technology. The method includes: performing triangular decomposition on a channel matrix of the MIMO system, and decomposing the MIMO system into multiple MIMO subsystems; detecting the receiving signal vector of the first MIMO subsystem, and obtaining the candidate detection vector list of the first MIMO subsystem; detecting remaining MIMO subsystems consecutively in a SIC mode, and generating candidate detection vector lists of the remaining MIMO subsystems; and combining all the lists, and marking decision or performing calculation to obtain the transmitting signal vector of the MIMO system. | 09-23-2010 |
20100284298 | Method and Apparatus for Transmitting Information by Using Cyclic Prefix Timeslots - A method for transmitting information by using Cyclic Prefix (CP) timeslots includes a transmitter transmitting CP information at a portion of CP timeslots when transmitting the timeslots or transmitting no CP information at CP timeslots when transmitting the CP timeslots. A method for using CP timeslots effectively and an apparatus for using CP timeslots are also disclosed. | 11-11-2010 |
20100329283 | METHOD AND DEVICE FOR RECEIVING NON-SYNCHRONOUS SIGNAL IN OFDMA SYSTEM - A method and device for receiving a non-synchronous signal in an Orthogonal Frequency Division Multiple Access (OFDMA) system are provided. The method includes the following steps. Fourier transform is performed on a received first time domain signal to acquire a corresponding frequency domain signal. A sub-carrier occupied by a band of a non-synchronous signal to be received in the frequency domain signal is set to zero, inverse Fourier transform is performed on the frequency domain signal to acquire a second time domain signal, and the second time domain signal is subtracted from the first time domain signal. Or, the sub-carrier other than the sub-carrier occupied by the band of the non-synchronous signal to be received in the frequency domain signal is set to zero, and inverse Fourier transform is performed on the frequency domain signal to acquire a time domain received signal corresponding to the band of the non-synchronous signal. | 12-30-2010 |
20100330922 | USER SELECTION METHOD AND APPARATUS FOR MULTIUSER MULTIPLE-INPUT MULTIPLE-OUTPUT - A user selection method and apparatus for multiuser multiple-input multiple-output (MIMO) are disclosed. The method includes: selecting two user-beam pairing modes, and obtaining target functions corresponding to the two user-beam pairing modes; comparing the target functions corresponding to the two user-beam pairing modes; and selecting a user-beam pairing mode with a larger target function. With the present invention, the optimal user-beam pairing mode can be quickly obtained when the channel information is inaccurate; and the calculation is simplified. | 12-30-2010 |
20110255395 | METHOD FOR CONSTRUCTING SPACE-TIME/SPACE-FREQUENCY CODE, AND TRANSMITTING METHOD AND APPARATUS - A method for constructing a space-time/space-frequency code, and a transmitting method and apparatus are provided, which relate to the field of wireless communication technologies. The method for constructing a space-time/space-frequency code includes: classifying at least two transmitter antennas into K groups, and classifying information symbols into K′ groups; constructing a Toeplitz matrix for information symbols in each group according to the number of transmitter antennas in a transmitter antenna group; and substituting the Toeplitz matrix for nonzero elements in an Orthogonal Space-Time Block Coding (OSTBC) matrix that is based on K and K′, and when the OSTBC matrix comprises a zero element, substituting a zero matrix with a corresponding dimension, for the zero element. The space-time code constructed with the above method has orthogonality. | 10-20-2011 |
20120236704 | RESOURCE ALLOCATION METHOD AND APPARATUS OF MULTI-RELAY ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM - A resource allocation method and apparatus of a multi-relay orthogonal frequency division multiplexing system are disclosed. The resource allocation method of a multi-relay orthogonal frequency division multiplexing system includes: obtaining actual channel information; obtaining resource allocation parameters according to a mathematical optimization problem based on the actual channel information, where the resource allocation parameters include at least two of subcarrier power allocation, relay selection and subcarrier pairing, and the mathematical optimization problem is a mathematical optimization problem set for the subcarrier power allocation, relay selection and subcarrier pairing by using an end-to-end transmission rate optimization principle and based on channel information; and transmitting a signal according to the resource allocation parameters. The foregoing technical solutions optimize system performance. | 09-20-2012 |
20120250780 | METHOD AND DEVICE FOR PRE-CODING, AND METHOD AND DEVICE FOR DECODING - The present invention relates to the field of wireless communications technologies, and discloses a method and device for pre-coding and a method and device for decoding. The present invention implements an interference alignment method with excellent performance, can effectively increase the capacity of a multi-user interference system and reduce the mutual interference among users, The method for pre-coding includes: calculating a pre-coding matrix for each transmitting end according to a sum of mean square errors of data vectors to be transmitted by each transmitting ends; and using the pre-coding matrix to pre-code the data to be transmitted by each transmitting end. The present invention has broad application prospects, for example, can be used in LTE and LTE-Advanced CoMP technology. | 10-04-2012 |
20120257579 | METHOD FOR FEEDING BACK CHANNEL STATE INFORMATION, AND METHOD AND DEVICE FOR OBTAINING CHANNEL STATE INFORMATION - Embodiments of the present invention provide a method for feeding back channel state information, and a method and a device for obtaining channel state information. The method for feeding back the channel state information includes: compressing, by a user equipment, original time domain channel state information to obtain compressed time domain Channel state information: quantizing the compressed time domain channel state information to obtain a codebook index; and sending the codebook index to a base station. With the technical solutions provided by the embodiments of the present invention, the total overhead used for feeding back the channel state information from the user equipment to the base station is reduced. | 10-11-2012 |
20120257695 | Network Coding Method and Device in Cooperative Communication - Embodiments of the present invention provide a network coding method and device in cooperative communication. The method, application and device relate to the field of wireless network communications. The method includes: receiving a signal sent from a first source node by using an OFDM symbol, and receiving a signal sent from a second source node by using an OFDM symbol; and performing a time reversal on one part of received mixed signals, and performing a reversal of a complex conjugate operation on the other part of the received mixed signals. The method, application and device have the advantage of obtaining a full diversity gain. | 10-11-2012 |
20130177097 | Interference Alignment Method and Device and Multi-Channel Communication System - An interference alignment method, an interference alignment device, and a multi-channel communication system are provided. The method includes: obtaining channel matrix in a multi-channel communication system; determining a first desired signal and a second desired signal of the multi-channel communication system according to the channel matrix; obtaining precoding vectors and receive vectors, after a first receive signal is filtered by a receive vector corresponding to the first desired signal, a signal formed by superposing interference signals included therein has a feature of a lattice constellation pattern, and that at a receiver corresponding to the second desired signal, after a second receive signal is filtered by a receive vector corresponding to the second desired signal, interference signals included therein are canceled, where the first receive signal and the second receive signal are transmit signals sent to the corresponding receivers after precoding processing is performed at transmitters by using corresponding precoding vectors. | 07-11-2013 |
20130272445 | PRECODING METHOD AND APPARATUS - A precoding method and apparatus are disclosed. The corresponding method includes: constructing a Lagrange function according to a precoding matrix, transmit power, a receive filter matrix and a weighting matrix, and obtaining a Lagrange multiplier by using the Lagrange function; updating the precoding matrix according to the Lagrange multiplier to obtain an iterative precoding matrix and an iterative receive filter matrix; obtaining an iterative Lagrange multiplier according to the iterative precoding matrix, the transmit power, the iterative receive filter matrix and the weighting matrix, and repeating the above steps in an iterative manner of updating the iterative precoding matrix according to the iterative Lagrange multiplier till the iterative precoding matrix converges to a threshold; and precoding information to be transmitted according to the iterative precoding matrix converging to the threshold. | 10-17-2013 |
20140112237 | METHOD FOR DEVICE TO ACCESS NETWORK, ACCESS POINT, NETWORK ACCESS DEVICE, AND SYSTEM - Embodiments of the present invention disclose a method for a device to access a network, an access point, a network access device, and a system. The method includes: generating, by an access point, a broadcast frame, where the broadcast frame includes feature information of a network access device; and the feature information is used for indicating a feature of the network access device; and broadcasting, by the access point, the broadcast frame, so that a specific network access device initiates a network access procedure to the access point; where the specific network access device is a network access device which receives the broadcast frame and has the feature indicated by the feature information. By adopting the present invention, contention collisions among network access devices can be reduced through a manner of accessing a network in batches. | 04-24-2014 |
20140112355 | Method, Apparatus and System for Transmitting Traffic Indication Message - A method, an apparatus, and a system for transmitting a traffic indication message, which relate to a wireless fidelity (WiFi) technology and are mainly applicable to a traffic indication message processing procedure. The method includes: compressing a delivery traffic indication message, and generating a traffic indication message; and transmitting the traffic indication message, where the traffic indication message includes compression method indication information and the compressed delivery traffic indication message. | 04-24-2014 |
20140126658 | LINK ADAPTATION FEEDBACK METHOD AND TRANSMITTING DEVICE - Embodiments of the present disclosure provide a link adaptation feedback method, including: receiving, by a transmitting device, a link adaptation feedback frame sent by a communication peer end, where the link adaptation feedback frame includes a modulation and coding scheme feedback request sequence identifier (MSI), where the MSI is configured to indicate space-time block coding type information; determining, according to the space-time block coding type indication information, use information about use of space-time block coding by a data frame related to the link adaptation feedback frame, and selecting, according to the use information, a space-time stream, modulation and coding scheme used when the transmitting device sends a data frame. | 05-08-2014 |
20140206503 | MEDICAL REHAB LIFT SYSTEM AND METHOD WITH HORIZONTAL AND VERTICAL FORCE SENSING AND MOTION CONTROL - A body-weight support system is disclosed, including an improved lift system and method. The system enables not only the support of patients undergoing rehab therapies, but including exercise modes that are both customizable and dynamic in nature, as well as a track system, wherein the system is capable of providing alternative functionality at differing locations. Other features disclosed include a system by which a movable support unit tracks or follows a patient, adjustable and variable supportive forces for users based upon, for example, a percentage of sensed body weight, and a user-interface that may be employed in a mobile, wired or wireless manner and will allow the use of multiple lift systems on a single, looped track system. | 07-24-2014 |