Patent application number | Description | Published |
20110228868 | CHANNEL ESTIMATION METHOD OF AN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM AND RECEIVING APPARATUS - A channel estimation method of an Orthogonal Frequency Division Multiplexing (OFDM) system and a corresponding receiving apparatus are provided. The technical solutions use the receiving apparatus to firstly perform channel estimation in time dimension on received signals, obtain channel information of pilot points from an effective sub-carrier frequency band on a frequency domain of each OFDM symbol, obtain information of the pilot points on frequency bands outside the effective sub-carrier frequency band by adding the information of the pilot points, and then perform Inverse Fast Fourier Transform (IFFT), windowing, zero-padding, and Fast Fourier Transform (FFT) to obtain a channel frequency response, so as to obtain a channel estimation result. The technical solutions can achieve goals of restraining an edge effect and improving accuracy of the channel estimation. | 09-22-2011 |
20120020440 | METHOD AND DEVICE FOR DETERMINING SMOOTH WINDOW LENGTH IN CHANNEL ESTIMATION - A method and a device for determining a smooth window length in channel estimation is provided. The method includes: obtaining autocorrelation values of pilot signals, where the autocorrelation values include first autocorrelation values and second autocorrelation values, at least two first autocorrelation values exist, and at least one second autocorrelation value exists; determining a speed range according to symbols of the first autocorrelation values or the symbols of the first autocorrelation values and a ratio value between the second autocorrelation value and one of the first autocorrelation values; and determining the smooth window length according to the speed range. Through the method provided in embodiments of the present invention, the problems caused by a fixed smooth window length may be avoided, and this improves system performance. | 01-26-2012 |
20120033713 | METHOD, APPARATUS, AND USER TERMINAL FOR RECEIVING AND PROCESSING DATA - The present invention discloses a method for receiving and processing data. The method includes: convoluting a channel estimate value of a receive end with an SCH signal transmitted by a transmit end on an SCH and obtaining an SCH signal in a receive signal of the receive end; evaluating a difference between the receive signal and the SCH signal in the receive signal. An apparatus, and a user terminal are also disclosed in the present invention. By using the method and apparatus of the present invention, the SCH signal in a receiver may be restored and removed from the receive signal, and interference of the SCH on other channels may be eliminated, thereby improving performance of the receiver. | 02-09-2012 |
20120123730 | METHOD FOR DETECTION USING A YI ALGORITHM, AND YI DETECTOR - In the field of communications technologies, embodiments of the present invention provide a method for detection using a YI algorithm and a YI detector, so as to solve the technical problem of poor detection performance caused by signal environment variation in the prior art. In the embodiment of the present invention, parameters are obtained according to a received signal; a level threshold at each level starting from a level corresponding to a Tailbits value is obtained according to the parameters, and validity of at least one node at the level is determined according to the level threshold, where the level is the same as a level of the level threshold; and a detection identifier is output according to the validity. The embodiment of the present invention is mainly applied to a scenario of detection using thresholds. | 05-17-2012 |
20120142302 | DOWN SAMPLING METHOD AND DOWN SAMPLING DEVICE - In the field of communications technologies, a down sampling method and a down sampling device are provided, to enable the energy of a down sampling point obtained in down sampling to be as large as possible. The down sampling method includes: extracting energy statistical values of sampling point sets in a current period; selecting a sampling position corresponding to a sampling point set with the largest energy statistical value as a down sampling position; and performing down sampling according to the down sampling position. | 06-07-2012 |
20120157109 | BANDWIDTH CONFIGURATION METHOD, DEVICE, AND SYSTEM - A bandwidth configuration method includes: A terminal acquires that a narrow bandwidth mode is used at a network side by a downlink transmission signal and/or an uplink transmission signal; and the terminal configures a receiving bandwidth and/or a transmitting bandwidth, where the receiving bandwidth and/or the transmitting bandwidth corresponds to the narrow bandwidth mode at the network side. The terminal side can acquire whether the network side uses the narrow bandwidth technology, and automatically adjust a bandwidth of a corresponding channel at the terminal side when the network side uses the narrow bandwidth technology, so that intra-system performance loss and inter-system interference that are caused by different bandwidth modes between the terminal side and the network side are avoided, thus improving performance of a communication system. | 06-21-2012 |
20120213264 | CHANNEL ESTIMATING METHOD AND DEVICE - A channel estimating method and device are provided. The method includes: performing multi-path searching on a pilot channel, and performing interpolation on a channel estimation value at a radial position of the multi-path searching ( | 08-23-2012 |
20120236908 | METHOD AND DEVICE FOR ESTIMATING RATIO OF AVERAGE CHIP ENERGY TO TOTAL TRANSMIT POWER SPECTRUM DENSITY - The present invention provides a method for estimating a ratio of average chip energy to a total transmit power spectrum density (Ec/Ior), including: according to a group of spreading codes corresponding to an acquired spreading factor, obtaining an estimated value of Ior; according to a spreading code of a physical channel to be estimated, obtaining an estimated value of Ec; and according to the estimated value of the Ior and the estimated value of the Ec, obtaining an estimated value of EC/Ior. The present invention further provides a device for estimating Ec/Ior. By adopting the method and device for estimating Ec/Ior, when a base station adjusts transmit power of each physical channel, an adjusted value of Ec/Ior can be obtained in real time for accurate estimation. | 09-20-2012 |
20120244897 | INTERFERENCE ELIMINATION METHOD AND APPARATUS FOR MULTI-ANTENNA SYSTEM - Embodiments of the present invention disclose an interference elimination method and apparatus for a multi-antenna system. The method includes: generating an equalization coefficient according to a baseband signal received on a receiving antenna, a channel estimation matrix, and an obtained cross-correlation matrix of transmitted signals of a downlink channel on multiple transmit antennas; and performing interference elimination processing on the baseband signal according to the equalization coefficient. | 09-27-2012 |
20120297223 | METHOD AND DEVICE FOR PROVIDING LOW POWER CONSUMPTION SERVICES AND COMMUNICATION SYSTEM - A method and a device for providing low power consumption services and a communication system are provided in the embodiments of the present disclosure. The method includes: receiving a low power consumption request sent by a terminal; when determining that the low power consumption request is supported, sending a first configuration parameter indicating that the low power consumption request is supported to a base station, so that the base station performs low power consumption communication with the terminal according to the first configuration parameter; and sending acknowledgement information indicating that the low power consumption request is supported to the terminal, in which the acknowledgement information carries a second configuration parameter, so that the terminal performs low power consumption communication with the base station according to the second configuration parameter. In this way, a network side provides services with different power consumption for different terminals according to requirements of terminals. | 11-22-2012 |
20130188668 | MULTIPATH SEARCHING METHOD AND MULTIPATH SEARCHER - Embodiments of the present invention provide a multipath searching method and a multipath searcher, to improve accuracy of delay estimation, thereby improving performance of a receiver. The method includes: performing processing on received signals r | 07-25-2013 |
20130189927 | INTERFERENCE ELIMINATION METHOD, INTERFERENCE ELIMINATION DEVICE, AND COMMUNICATION SYSTEM - Embodiments of the present invention provide an interference elimination method, an interference elimination device and a communication system, which are used to implement the effective elimination of signal interference of a receiving end. The method includes: according to a received signal, reconstructing a main cell signal, obtaining the reconstructed main cell signal, and subtracting the reconstructed main cell signal from the received signal, so as to obtain a first residual signal; according to the first residual signal, reconstructing an interference cell signal, and obtaining the reconstructed interference cell signal; and according to the received signal and the reconstructed interference cell signal, obtaining an interference-eliminated main cell signal. According to the interference elimination method, the interference elimination device and the communication system in the embodiments of the present invention, the interference elimination may be performed on the received signal effectively. | 07-25-2013 |
20130287140 | Method and a user terminal for processing digital predistortion - Embodiments of the present invention provide a digital predistortion processing method and a user terminal, which relate to the field of communications, and can simplify the structure of a digital predistortion apparatus and reduce the cost. The method includes: setting a control command; and tuning, when the control command is selecting a data collection mode as the working mode of a receive channel, the frequency of a local oscillator and the central frequency of a band-pass filter in the receive channel to the transmitting frequency of the user terminal, so that the user terminal performs predistortion factor update. The embodiments of the present invention are applied to the user terminal for digital predistortion processing. | 10-31-2013 |
20130287152 | MULTI-CARRIER RECEIVING DEVICE AND METHOD - The present invention discloses a multi-carrier receiving device and method. The multi-carrier receiving device includes an antenna, a splitter, a plurality of analog extraction modules, a combiner, an analog-to-digital converter, and a plurality of digital extraction modules, where input ends of the plurality of analog extraction modules are connected to an output end of the splitter; an input end of the combiner is connected to output ends of the plurality of analog extraction modules, and an output end of the combiner is connected to an input end of the analog-to-digital converter; an output end of the analog-to-digital converter is connected to each of the plurality of digital extraction modules; and the plurality of digital extraction modules extracts a single-carrier digital signal from a digital signal obtained after analog-to-digital conversion. | 10-31-2013 |
20140106741 | METHOD AND APPARATUS FOR IMPROVING CALL QUALITY FOR USER - Embodiments of the present invention disclose a method and an apparatus for improving call quality for a user, which relate to the field of communication technologies and are invented for improving call quality for a user while improving frequency spectrum utilization. The method for improving call quality for a user includes: obtaining an interference suppression parameter and frequency band interference information of a target carrier; determining an interference suppression coefficient according to the interference suppression parameter and the frequency band interference information; and suppressing interference on the target carrier by using an interference suppression apparatus having the interference suppression coefficient. | 04-17-2014 |
20140307718 | PILOT SIGNAL TRANSMISSION METHOD, CHANNEL ESTIMATION METHOD, AND APPARATUS AND SYSTEM - A pilot signal transmission method, a channel estimation method, and an apparatus are provided, and the method for a pilot signal transmission includes: transmitting a pilot signal 1 CPICH1 over a first antenna, and transmitting a pilot signal 2 CPICH2 over a second antenna; transmitting a pilot signal CPICHk1 over a k1 | 10-16-2014 |
20140341162 | Method and Apparatus for Selecting Transport Format - A method and an apparatus for selecting a transport format are provided. The method includes: receiving a transport format parameter of a user equipment sent by a base station, where the transport format parameter of the user equipment includes a primary stream grant value and an association between the primary stream and the secondary stream; determining a maximum transport block length of the primary stream according to a preset value of the maximum transmit power of the user equipment and the association between the primary stream and the secondary stream; determining an actual transport block length of the primary stream according to a size relationship between a theoretical transport block length of the primary stream and the maximum transport block length; and determining a transport block length of the secondary stream. | 11-20-2014 |
20140341320 | METHOD AND APPARATUS FOR TRANSMITTING DATA STREAMS IN MIMO SYSTEM - A method for transmitting data streams in a multiple input multiple output (MIMO) system is provided, where each data stream is mapped to multiple layers in an MIMO channel space for transmission, and the method includes: performing inter-layer interleaving for N data streams to obtain N interleaved data streams; mapping the N interleaved data streams respectively to N layers in the MIMO channel space, and transmitting the N interleaved data streams that are mapped to the N layers. By using the method of the present invention, a combined CQI can be used in a better way to improve MIMO transmission performance. Further, an impact of inter-layer interference is canceled by using an interference cancellation technology (for example, an SIC technology) based on the inter-layer interleaving. | 11-20-2014 |
20140348120 | Methods and Nodes in a Wireless Communication Network - Receiver and method in a receiver, for iterative channel estimation and data decoding of signals received from a radio network node, located in a wireless communication network. The method comprises detecting a signal of the radio network node, performing channel estimation of the detected signal, based on iterative application of a Space Alternating Generalised Expectation and maximisation, SAGE, algorithm, determining a channel/link quality, based on the performed channel estimation and the estimated channel parameters, selecting Multiple-Input and Multiple-Output, MIMO, detector, based on the determined channel quality, determining to enable and/or disable, respectively, soft-Iterative Channel Estimation, soft-ICE, based on the determined channel quality, and iterating the performed channel estimation for a predetermined number of times. | 11-27-2014 |
20140362834 | Scheduling Information Transmission Method, Device, and Communications System - A scheduling information transmission method, device, and communications system are provided. The method includes: generating a channel attribute parameter and a serving grant (SG), where the channel attribute parameter and the SG are used for data scheduling of uplink multiple input multiple output (MIMO); and delivering the channel attribute parameter and the SG to a user equipment (UE) through a target channel, where the channel attribute parameter is used by the UE to determine a primary-stream enhanced dedicated channel transport format combination indicator (E-TFCI) and a secondary-stream E-TFCI. In the scheduling information transmission method, device, and communications system that are provided in embodiments of the present invention, the determined E-TFCIs can better adapt to different channel conditions, which improves data transmission performance. | 12-11-2014 |
20140369300 | Iterative Interference Cancellation Method - The present disclosure relates to an iterative pilot symbol interference cancellation method in a receiver node of a cellular wireless communication system. The method includes receiving a superimposed signal comprising pilot symbols and data symbols associated with a serving cell and pilot symbols associated with one or more interfering cells, extracting a first set from the superimposed signal. The first set includes a plurality of data symbols associated with said serving cell which are affected by an interference from the one or more interfering cells. The method further includes estimating an interference of the first set, removing interference from the first set using the estimated interference, estimating the plurality of data symbols, subtracting the estimated plurality of data symbols from the first set, and repeating the estimating an interference, the removing interference, the estimating plurality of data symbols, and the subtracting steps i number of times, where i≧1. | 12-18-2014 |
20150078312 | METHOD FOR FEEDING BACK UPLINK CONTROL INFORMATION IN DOWNLINK MIMO MODE AND USER EQUIPMENT - Embodiments of the present invention disclose a method for feeding back uplink control information in a downlink MIMO mode and a user equipment, which are used to implement that a UE feeds back control information to a base station, are applicable to a precoding weight set restriction application scenario, and reduce transmit power of the UE while ensuring HS-DPCCH receive performance of the base station. The method provided by the embodiments of the present invention includes: generating, by a UE, 1-bit precoding control indicator (PCI) information; generating, by the UE, channel quality indicator (CQI) information; performing, by the UE, joint encoding on the PCI information and the CQI information, to obtain a joint encoding result; and feeding back, by the UE, the joint encoding result to a base station through an uplink high speed dedicated physical control channel (HS-DPCCH). | 03-19-2015 |