Abstract: The present invention discloses a beam-forming method for realizing interference suppression, comprising steps of: a. performing channel estimation for an expected user signal and interference signal in signals received by an array antenna and obtaining array channel impulse responses of the expected user signal and the interference signal respectively; b. obtaining array correlation matrixes of the expected user signal and the interference signal respectively according to the array channel impulse responses obtained in step a; c. obtaining a new array correlation matrix of the interference signal according to relation between the expected user signal with the interference and noise; and d. computing a beam-forming weighting coefficient of the array antenna according to the array correlation matrix of the expected user signal obtained in step b and the new array correlation matrix of the interference signal obtained in step c.

Abstract: A method for processing an array antenna signal is disclosed, comprising steps of: a. determining the number of antenna units participating the processing of the array antenna signals and selecting antenna units to participate the array antenna signal processing from all the antenna units in the array antenna; b. performing signal estimation processing on received signals by all the antenna units selected in step a and obtaining a user feature parameter estimation; c. performing estimation of weight coefficients for all the antenna units of the array antenna based on the user feature parameter estimation obtained in step b; and d. receiving and/or transmitting the array antenna signals based on the weight coefficients estimated in step c. The method of the present invention can effectively reduce a computation amount of the array antenna signal processing and improve a reliability of a received signal.

Abstract: A method and system for achieving frequency domain scheduling in a time division duplex system is disclosed, the method comprising: a first device transmits a non pre-coded reference symbol to a second device; from the reference symbol, the second device obtains a channel impulse response matrix experienced by the reference symbol transmitted from the first device, and according to the channel impulse response matrix, obtains linear spatial domain pre-coding matrix of candidate physical resource blocks used in transmitting data to the first device; from the channel impulse response matrix and the linear spatial domain pre-coding matrix, the second device obtains the channel quality indication of the candidate physical resource blocks; and performs the frequency domain scheduling according to the channel quality indication.

Abstract: The present invention discloses a method for suppressing cross-slot interference in a time-slotted CDMA system. The method includes: determining, by a base station, positions of cross slots according to configuration information of local cell and configuration information of co-frequency adjacent cells, and performing multi-cell channel estimation on the cross slots to obtain channel estimation results; determining, by the base station, code channel configuration information of the co-frequency adjacent cells, grouping the determined code channels and determining the code channels of the co-frequency adjacent cells involved in a joint detection; and performing, by the base station, the joint detection according to the multi-cell information estimation results and the determined code channels of the base stations involved in the joint detection to obtain detection data.

Abstract: Three channel coding schemes for multi-carrier HSDPA packet data transmission are disclosed. The first scheme includes: dividing data into N groups (S210); performing CRC attachment, code block segmentation, channel coding and rate matching on each group of data respectively (S220); scrambling and interleaving the N groups of data unitedly, and then dividing the data into N groups again to perform QAM constellation rearrangement and then map to physical channels of respective carriers for transmission. The second scheme includes: dividing data to be sent into groups (S510); and sending each group of data via a physical channel of a carrier after coding it according to single-carrier HSDPA (S520). The third scheme includes: sending N carrier channels as a whole to a physical layer to perform processing from CRC attachment to QAM constellation rearrangement (S710); dividing the processed data into groups and mapping them to respective carrier channels for transmission (S720).

Abstract: A multi-code-set channel estimation method in a time-slot CDMA system having steps of: A. performing uni-code-set channel estimations and obtaining channel estimation result; B. extracting a maximum interference tap from the channel estimation result; C. reproducing interference components suffered respectively by response signals corresponding respectively to the plurality of code-sets from the maximum interference tap; D. canceling the interference components, and obtaining a pure channel estimation result of a signal corresponding to each code-set; E. determining whether a predetermined number of iterations has been performed, if so, outputting the result of each uni-code-set channel estimation; otherwise, taking the pure channel estimation result of the signal corresponding to each code-set as the channel estimation result of the code-set to be processed in the next iteration, and returning to step B.

Abstract: The present invention discloses a method of allocating downlink traffic channel resources for multi-carrier HSDPA, and the method includes: first of all, selecting a carrier with the optimum channel condition; determining whether the carrier meets the resource allocation demand of a downlink traffic channel, if yes, allocating resources that meet the downlink traffic channel on the carrier; otherwise, allocating the available resources of the carrier to the downlink traffic channel, and selecting a carrier with the optimum channel condition from the remaining carriers for resource allocation according to the remaining resource allocation demand of the downlink traffic channel. The present invention provides, according to the transmission characteristic of the existing HSDPA multi-carrier, a method for allocating downlink traffic channel resources, which method is applicable for packet data transmission of the multi-carrier HSDPA.

Abstract: A multi-cell joint-detection method in a time-slotted CDMA system includes: performing a multiple code set channel estimation on received signal data and obtaining channel estimation results of a home cell and of neighboring cells; adjusting the channel estimation results of the home cell and/or neighboring cells or the estimation result of a combined channel response according to a comparative delay difference between signals of users in different cells; and performing a joint-detection according to the estimation result of the combined channel response obtained by adjusting the channel estimation results of the users in different cells or according to the estimation result of the combined channel response. The MAI between neighboring universal-frequency cells having comparative delays and especially large comparative delays is greatly suppressed and the performance of the time-slotted CDMA system when working in neighboring universal-frequency cells is improved.

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: A method for a time division duplex mobile communication system comprises that setting a minimum unit of transmission time interval and a system frame structure, wherein each radio sub frame is composed of a downlink pilot time slot, a switching guard period, a synchronization time slot and a plurality of service time slots, and the transmission time interval uses the length of time slot as a unit; a user obtaining downlink synchronization by receiving downlink pilot information of the downlink pilot time slot, and obtaining corresponding configuration information of cell by reading cell broadcasting information, and then transmitting uplink synchronization information in the synchronization time slot to fulfill a random access process, wherein the configuration information includes transmission time interval and system frame structure information; the network side/the user transmitting call information to an opposite end, and the opposite end processing call acknowledgement according to the transmission time

Abstract: The invention discloses a distribution method of channelization code in code division multiple access system, which including: A. the spread spectrum codes distributed to every sector and the correlated coefficients between the spread spectrum codes distributed to every neighbouring sector are calculated according to the cellular codes and the channelization codes distributed to every sector, when the network is programmed; B. every sector is divided into different regions and the edge region of every sector is formed; C. the priority of which every channelization code is at the edge region of every sector is decided according to the correlated coefficients between the spread spectrum codes distributed to every neighbouring sector; D. the position information of user is real-time calculated during the operation of system, and which region the user positioned in sector is determined according to the position information; E.

Abstract: Finding a channel impulse response estimation window in a current cell for at least one mobile terminal in a neighboring cell is disclosed. This can serve to mitigate interference caused by mobile terminals in neighboring cells in and among communications ongoing in a current cell. In one example, a method for A method for determining such a channel impulse response estimation window includes presetting, in the neighboring cell, at least two channel impulse response peak locations of respective mobile terminals in first and second predetermined periods with a predetermined peak location change pattern, and then upon receiving communication from a mobile terminal of the neighboring cell, analyzing channel impulse responses to identify the peak location change pattern with regard to first and second peak locations.

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: The present invention is directed to a multicell joint detection method, it deals against the interference between same frequency neighbouring cell's signals in slotted CDMA system, and provides a joint detection method based on the multicell structure information. The method includes the steps of: using channel estimation of multi-set of codes to obtain channel estimation results of each neighbouring cell; grouping each neighbouring cell's code channel, including grouping based on the code channel's cell, grouping based on the code channnel's power or amplitude intensity, grouping based on the code channel's pertinence, and mixed grouping based on the above methods; making use of the channel estimationation result and the result of code channel grouping to process the joint detection and output the detection data. This method makes full use of the structure information of each multicells signal, and efficiently restrains the multiple-access interference of the same frequency neighbouring cell.

Abstract: A method is disclosed for performing a handoff in a telecommunication system. The method comprises: performing a first multi-cell joint detection process for decoding the communications within the home cell when a mobile terminal enters a handoff region between a home cell and one or more neighboring cells; performing a handoff process when the mobile terminal is in the home cell to join a target neighboring cell; and performing a second multi-cell joint detection process for decoding the communications between the mobile terminal and the target neighboring cell. In this manner, decoding for uplink and/or downlink communications is improved, and throughout and performance of the telecommunication system is enhanced.

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: 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: A space-time encoding and decoding for a frequency selective fading channel. 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, and two diversity signals, and transmits them simultaneously, each through one diversity antenna. A receiving terminal neglects mutual interference between said two diversity signals caused by non-orthogonality, performing joint detection only taking into account affect to said two diversity signals from multipath interference and multi-user interference, obtaining a decoding result. 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.