| Patent application number | Description | Published |
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| 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 |
