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 |
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 |
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 |
20140169331 | Method and Device for Power Control of High Speed Dedicated Physical Control Channel - The present invention provides a method and a device for power control of a High Speed Dedicated Physical Control Channel (HS-DPCCH). If a User Equipment (UE) is in a soft handover state and configured to a multi-flow transmission mode, the UE obtains a first HS-DPCCH power offset and an HS-DPCCH adjustment step size that are corresponding to each cell group in all cell groups of the UE. The UE determines a second HS-DPCCH power offset of the cell group according to the HS-DPCCH adjustment step size and the first HS-DPCCH power offset. The UE adjusts current transmit power of the HS-DPCCH according to the second HS-DPCCH power offset of the cell group. | 06-19-2014 |
20140200021 | Interference Processing Method and Device - Embodiments of the present invention provide an interference processing method and device. A user equipment receives a notification message sent by a network side. The notification message includes a resource scheduling manner of a first base station, and the resource scheduling manner is a manner of allocating, by the first base station, resources for downlink service data transmission of a local user equipment. The user equipment detects, according to the resource scheduling manner, an interference signal generated by the first base station and performs interference cancellation processing according to a detection result. | 07-17-2014 |
20140204861 | Method and Apparatus for Power Control and Parameter Configuration - Embodiments of the present invention provide a method and an apparatus for power control. In one embodiment, a current serving node is a first base station. A first switching time at which the second base station switches from transmission of a non-ABS subframe to transmission of an ABS subframe is determined according to an ABS pattern parameter of a second base station. At the first switching time, a target SINR value is adjusted before current switching to obtain a target SINR value of the first switching time. | 07-24-2014 |
20140204862 | SIGNALING TRANSMITTING METHOD, USER EQUIPMENT, AND BASE STATION - The present invention provides a signaling transmitting method, a user equipment and a base station. In the present invention, a first DPCCH is transmitted to a base station over an uplink main carrier, where information borne over the first DPCCH at least includes: first Pilot information, downlink TPC information, and the downlink TPC is at least used for the base station to perform power control on a downlink main carrier; and a second DPCCH is transmitted to the base station over an uplink secondary carrier, where the second DPCCH is used to bear uplink signaling, and the uplink signaling is second Pilot information, or, the uplink signaling is the second Pilot information and TFCI information, or, the uplink signaling is the second Pilot information and FBI information, or, the uplink signaling is the second Pilot information, the TFCI information and the FBI information. | 07-24-2014 |
20140254559 | Systems and Methods for Interference Cancellation Capability Reporting and User Equipment Offloading in Heterogeneous Networks - Embodiments are provided for interference cancellation (IC) capability reporting and user equipment (UE) offloading in wireless or heterogeneous networks. In an embodiment, a method performed by a UE includes reporting, to a network, IC capability information of the UE, and receiving, from the network, instructions in accordance with the IC capability information of the UE. A handover procedure is then initiated in accordance with the instructions. In another embodiment, a method performed by a network component includes receiving, from a UE, IC capability information of the UE, evaluating the IC capability information of the UE, and sending instructions to the UE in accordance with the IC capability information of the UE. The instructions determine a handover behavior by the UE. | 09-11-2014 |
20140307673 | Method for Sending Control Information and Base Station - Embodiments of the present invention provide a method for sending control information and a base station. The method includes performing rate matching on a coded sequence obtained by performing channel coding on second control information to obtain a symbol sequence. The second control information includes bit information indicating layer number information. The method also includes sending the symbol sequence to a user equipment (UE) over a high speed shared control channel (HS-SCCH). | 10-16-2014 |
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 |
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 |
20150063493 | PILOT SIGNAL TRANSMITTING METHOD, AND CHANNEL ESTIMATION METHOD, APPARATUS, AND SYSTEM - Embodiments of the present invention disclose a pilot signal transmitting method, and a channel estimation method, an apparatus, and a system. The method includes: within a transmission time interval (TTI), transmitting a first pilot signal (CPICH | 03-05-2015 |
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 |