Abstract: The method for power control in HSDPA includes Step A, the UE with the highest priority and having data to be transmitted is selected according to the algorithm, the channel resource is distributed to the UE, and the original power level is set. Step B, the transmission power is deduced when the channel quality meets the condition; Otherwise the CQI is checked, if the value of CQI is under the highest rate level, or the data is the re-transmitting data, the transmission power is increased, or the power is kept the same level. Step C, channel resource and the UE with the highest priority are checked, if there exist, then go to step B, otherwise the method is ended. So the redundant power can be used when several UEs are controlled at the same time, the efficiency and the throughput performance are improved, and the interface is reduced. The device for power controlling is given at the same time.

Abstract: The present invention provides a method for obtaining bearer condition during a handover of UE. The method includes: receiving, by a mobile management entity (MME), information of at least one bearer allowed to be accepted by a target base station (eNB) when the eNB makes an admission control for a UE based on received bearer information of the UE during handover of the UE; updating, by the MME, a UE-AMBR used by the target eNB based on the received at least one bearer. The present invention also provides an MME which enables the target side obtain actual bearer condition during handover of a UE.

Abstract: The present invention provides a method for configuring a Sounding Reference Signal (SRS). The method includes: determining, by a base station, an SRS periodicity available for a cell, and determining at least one SRS configuration position available in a sub-frame for the cell based on the SRS periodicity determined; and jointly coding, by the base station, the SRS periodicity and the at least one SRS configuration position, and transmitting a result of the joint coding to all User Equipments (UE) in the cell through broadcast signaling. The present invention also provides an apparatus for configuring an SRS. The present invention implements configuration of SRS transmission and can avoid conflict between SRS and uplink control information.

Abstract: A method using a frame structure which supports relay for wireless transmission, which divides the time slots of a sub-frame into some zones, in which the data is transmitted using the manner of TDD, wherein further including that at least one time slot in a sub-frame is set as a hybrid zone; the transmission of the data is realized through frequency division multiplexing the access link and relay link in the hybrid zone of the sub-frame; and also the multi-hop relay is supported under the two work manners of relay in sub-frame and relay in frame.

Abstract: The present invention discloses a method for detecting orthogonal code CDMA signal implemented mainly through the following steps: estimating the total power of interference to the multi-path signals; performing matched filtering on the multi-path signals and performing maximum ratio combining on the multi-path signals by utilizing the total power of interference to the multi-path signals, to obtain the optimized matched filtering result; and performing joint detection on the optimized matched filtering result. There are two schemes for implementing: if the optimized matched filtering detection scheme is used, only the first two main steps are executed; if the joint detection scheme is used, all of the three steps are executed. In either of above two schemes, the interference code channels involved in the estimation of total power of interference to the multi-path signals are need to be selected, i.e.

Abstract: The invention discloses a space-time encoding and decoding method for a frequency selective fading channel, comprising: an encoder takes two independent data fields of a time slot in input data as a processing unit with space-time orthogonal encoding method, encodes them and generates two data vectors, thereby forming two diversity signals, and transmitting said two diversity signals simultaneously with each through one diversity antenna; a receiving terminal neglects mutual interference between said two diversity signals caused by non-orthogonality; the terminal performing joint detection only taking into account affect to said two diversity signals from multipath interference and multi-user interference, thereby obtaining a decoding result; and implementing interference counteraction based on result of joint diction to remove interference between the two diversity signals, and then returning to the previous step to implement iteration for decoding processing. The number of iteration times can be predefined.

Abstract: The present invention discloses a method for improving the performance of the CDMA TDD wireless communication system. It is a method for increasing the transmission rate in a multi-slot CDMA system. The method comprises combining a plurality of neighboring time slots to form a combined time slot with a length of integer times of the length of the original time slot, wherein the modulation modes adopted by the combined time slot are not limited, and transmitting traffic data with at least one service data field in the combined time slot, and using the guard period in the combined time slot for guard between combined time slots.

Abstract: The invention discloses a method of applying a long cell-code in a joint detection system. At transmitters, multiples of the spreading code (spreading factor) is taken as the length of the long cell-code to scramble the signal, and at receivers, the method still takes the multiuser detection to process the received signal.

Abstract: The present invention discloses a method for detecting random access of User Equipment (UE), applicable to a mobile communication system consisting of at least one Base Station (BS) and a group of UEs; wherein the BS and the group of UE use a set of N (N is a positive integer) orthogonal or quasi-orthogonal pseudo-random sequence codes for UEs' random access.

Abstract: The present invention provides a method for detecting active code channels of multiple users in a wireless communications system. The method comprises the steps of: receiving the radio signals that contain the signals of at least two of said multiple users; separating the data and training sequences of said received radio signals; making channel estimation based on said separated training sequences to obtain the estimated channel response; obtaining, based on said estimated channel response, the active channel response windows; obtaining the allocated spreading codes to which said active channel response windows may correspond; determining, based on the estimated channel responses and the possible corresponding allocated spreading codes, the active spreading code channels corresponding to said active channel response windows; making multi-user detection in the determined active code channels. Thus the blind or semi-blind detection of the receiver is implemented.

Abstract: The present invention discloses a gain control method used at the initial cell searching by the user terminal in TD-SCDMA mobile communication system. At each carrier frequency, the user terminal firstly receives and records the data of a plurality of subframes transmitted from a base station when the receiver is set at the maximum gain; searchs the DwPTS positions by using the time window decision method; performs the succeeding steps of the initial cell searching subsequently when the DwPTS positions can be obtained; judges whether the receiver is in saturation when the DwPTS positions can not be obtained; decreases the receiver gain by a large step and receives and records the data of a plurality of subframes transmitted from the base station if the receiver is in saturation; and determines that there is no base station for working at the present carrier frequency if the receiver is not in saturation. The above initial cell searching procedures are repeated until the receiver is not in saturation any more.

Abstract: A multiuser demodulation method with variable spreading factor may use the multiuser detection and variable spreading factor techniques in the same system at the same time without increasing the demodulation computation volume or the system time-delay. At the receiving side, the method may include: taking a low spreading factor to demodulate the received signals with the multiuser detections and obtaining intermediate demodulation results of the Transport Format Combination Indicator (TFCI) data and of the user data; demodulating the intermediate demodulation result of the TFGI data with a fixed spreading factor or a variable spreading factor; obtaining a real spreading factor from the demodulated intermediate demodulation result of the TFCI data; and processing the intermediate demodulation result of the user data with the real spreading factor to obtain the final received user data.

Abstract: A channel estimation method for multiple code-sets in a time-slotted CDMA system. The method includes: A) performing a single code-set channel estimation of the received signal of each code-set, respectively, to obtain an original channel estimation, and deciding whether the desired number of iterations is reached; if yes, outputting each single code-set channel estimate; otherwise, going to Step B; B) performing limited time decision for the original channel estimates, retaining taps of channel estimation that meet a certain condition, recovering the interference caused by the response of each code-set using the tap values; canceling the interference caused by the response of other code-sets in the received signal of each code-set to obtain a clean signal of each code-set; taking the clean signal of each code-set as the said received signal of each code-set; and returning to Step A.

Abstract: The invention discloses a method for estimating the space correlation characteristics of noise in a time slotted CDMA system. The method comprises the steps of: making channel estimation for the received signal of each antenna of an antenna array, respectively, to obtain the original channel estimation result including values of P taps, where the value of P equals the period of the basic code used for channel estimation; separating the signal response component and the noise response component from said original channel estimation result to obtain a noise response matrix of said antenna array; and making correlation operation with said noise response matrix to obtain a space correlation matrix of noise. The invention provides a method for estimating the space correlation characteristics of noise in a time slotted CDMA system. The method is simple, effective, and of good numerical stability, displaying good performance of estimation.

Abstract: A handover method in a mobile communication system, wherein, while maintaining communication with a certain base station before handover, a mobile terminal measures signals of adjacent cells and confirms the candidate handover target base stations; the mobile terminal sends measurement report to network; inserting the procedure of pre-synchronization between the mobile terminal and the handover target base station, including: while sending measurement report to the network, the mobile terminal sends training sequence to the handover target base station; after receiving the training sequence, the handover target base station sends training sequence response message to the mobile terminal; the mobile terminal maintains open-loop or closed-loop synchronization with the handover target base station; the network sends handover command to the mobile terminal; the mobile terminal directly switches to the handover target base station according the handover command; wireless link between the mobile terminal and the ha

Abstract: A correction method for time varying channels in a time slot division mobile communication system that includes: performing channel estimation and signal detection for a time-slot or burst signal received with a time invariant block processing method; estimating the channel deviation by using the detection result of some symbols that are near the channel estimation code; correcting the channel estimation with the estimated channel deviation; and demodulating the said detection result with the corrected channel estimation. The procedure can be carried out once or for a plurality of times.

Abstract: The present invention relates to a method for measuring interference power in a time slot CDMA system, especially for applications of downlink receiving devices in a time slot CDMA system. The method includes: performing channel estimation for received signals with channel estimation codes, to obtain the original channel response estimation results hi, i=1 . . .

Abstract: The present invention discloses a method for detecting orthogonal code CDMA signal implemented mainly through the following steps: estimating the total power of interference to the multi-path signals; performing matched filtering on the multi-path signals and performing maximum ratio combining on the multi-path signals by utilizing the total power of interference to the multi-path signals, to obtain the optimized matched filtering result; and performing joint detection on the optimized matched filtering result. There are two schemes for implementing: if the optimized matched filtering detection scheme is used, only the first two main steps are executed; if the joint detection scheme is used, all of the three steps are executed. In either of above two schemes, the interference code channels involved in the estimation of total power of interference to the multi-path signals are need to be selected, i.e.

Abstract: Transmitting and receiving compensation coefficients of each antenna element relative to a calibration antenna element are obtained in the pre-calibration of a smart antenna. After the antenna array is installed, in transmitting calibration, amplitude and phase response of each transmitting link is computed according to the calibration signals received by the calibration link and, together with the transmitting compensation coefficient obtained in the pre-calibration, the compensation coefficient of each transmitting link is computed to compensate the downlink data of a base station. In receiving calibration, the amplitude and phase response of each receiving link is computed based on the signals received by the receiving links and, together with the receiving compensation coefficient obtained in pre-calibration, the compensation coefficient of each receiving link is computed to compensate the uplink data of the base station.

Abstract: A real-time calibration method for a smart antenna array. The method includes: before installation, a smart antenna array is pre-calibrated to obtain transmission-coefficient matrix between antenna units; after installation at site, the pre-calibrated transmission-coefficient matrix is loaded in a base station to which the smart antenna array connects; during running, every transmission link of the base station transmits a unit calibration signal in sequence in a time-slot, and all other links, except the transmitting link, are in a reception state to receive the unit calibration signal, and the received unit calibration signals are recorded; with the received unit calibration signals and pre-calibrated transmission-coefficient matrix, the smart antenna array is calibrated. The method does not need beacon antenna, coupled structure of the antenna array and a special calibration link.