Zte Corporation

Yanwen Wang

Wenhao Liu

Li Zhang

Yan Li

Qiang Wang

Yongqiang Wang

Tao Jin

Jing Jiang

Saijin Xie

Dongli Chen

Xi'an Liang

Lidong Chi

Yunkuan Wang

Xianming Lu

A method, a device and a system for precoding based on CoMP are provided. The method includes: a serving base station receives an expected PMI of a terminal associated with the serving base station and a leakage PMI of a terminal associated with a cooperation base station, which is sent by the cooperation base station, wherein the expected PMI is corresponding to encoding codeword in an expected terminal direction, and the leakage PMI is corresponding to encoding codeword in an interference direction; the serving base station selects expected encoding codeword according to the expected PMI and selecting leakage precoding codeword according to the leakage PMI; and the serving base station convolve the expected encoding codeword and the leakage precoding codeword to obtain precoding codeword used for signal transmission by the serving base station. In the present invention, by use of the CoMP technology, the accuracy of reducing interference of edge user terminals is improved.

Method, device and system for precoding based on CoMP

A method and device for sending service data are provided in the present invention, so as to realize simplification of a precoding matrix calculation method. The method includes: a network side executing the following steps: calculating a value space matrix according to a signal channel matrix of a serving cell of a terminal; calculating a null space matrix according to an interference channel matrix of a coordinating cell of the terminal; projecting a vector of the value space matrix to a space on which a vector of the null space matrix is located to obtain a precoding matrix of the terminal; and sending the service data in the serving cell of the terminal according to the precoding matrix.

Method and device for delivering service data

A method for implementing precoding includes the following steps: dividing hierarchical data which has passed through layer mapping processing into at least two paths to be received respectively (S); splitting a precoding matrix according to the divided paths of hierarchical data, and respectively left multiplying the split precoding matrixes with the divided paths of hierarchical data (S); and adding the data of corresponding bits of the matrixes obtained by respectively left multiplying with the divided paths of hierarchical data, to obtain precoding output data (S). The present invention also provides an apparatus and a system for implementing precoding. The present invention, by performing the process of splitting firstly and then combining to the precoding, can realize the precoding operation with large bandwidth and multi-antenna by using the existing platform at the transmitter of the base station, thereby saving the costs and enhancing the usage flexibility.

Method, apparatus and system for implementing precoding

A method for multi-beam forming based on joint receiving and transmitting end information is provided. The method includes: a transmitting end decomposing a channel matrix H using a geometric mean decomposition (GMD) way to obtain a unitary matrix P; the transmitting end using the unitary matrix P as a weight matrix of GMD beam forming and executing multi-beam forming processing on an original transmission signal x. The present invention also provides a system for multi-beam forming based on joint receiving and transmitting end information, and a transmitting device and receiving device for supporting multi-beam forming based on joint receiving and transmitting end information. By using geometric mean decomposition way to decompose the channel matrix H, the sub channels corresponding to various beams obtain the equal gain. When the channel is ill-conditioned, the channel equalization will not interfere with searching the perturbation vector, thereby avoiding the performance degradation.

Method and system for multi-beam forming based on joint transceiver information

A method of realizing smart antenna based on software radio and system therefore in IMT-2000 CDMA system. Channel conditions are classified according to the features of wireless communication channel conditions, covariance matrix of array receiving signals is step-by-step dimension-reduced and decorrelated using special smoothing differential processing method, obtaining the structure related to the receiving signals by gradually converting correlated signal into independent signal sources and realizing conditions recognition, and respectively calculating receiving weights and transmitting weights using corresponding receiving adaptive beam forming algorithm and transmitting adaptive beam forming algorithm selected according to the result of channel condition classifying. By using adaptive beam forming method of smart antenna based on software radio, the present invention has the following advantages comparing with existing adaptive beam forming method: good adaptability, avoidance of the limitation of single adaptive beam forming method, easiness of upgrading and maintaining based station system, and effective suppression of disturbing effect.

Method of realizing smart antenna based on software radio and system therefor

A method and device for realizing smart antenna in WCDMA system are disclosed in the invention, including array antenna, radio frequency channel module, beam forming module, channel environment detection and classification module, beam-forming algorithm selection and weight value generation module. After processing the signals received by the antenna array in RF channel, the baseband array data X including multiple components is obtained, then the channel environment is estimated and identified according to the characteristics of said array data, and the channel type which the channel belongs to is determined; the corresponding adaptive beam forming algorithm is selected according to the identification result of the channel type, so as to calculate the uplink weight value W including multiple components; said array data X and weight value W are multiplied so as to form beam Y. The invention can adopt corresponding adaptive beam forming algorithm based on the channel environments, thus it can effectively restrain the interference under various channel environments.

Method and equipment for realizing smart antenna in WCDMA system

A beam forming method for a smart antenna and smart antennas configured to employ the method, in which pre-multibeam processing and time delay aligning are implemented to array signals, and then a suboptimum weight is calculated by means of a pilot frequency symbol, and an optimum weight is iteratively calculated with the suboptimum weight as an initial value, and finally the beams are formed by means of the optimum weight.

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Shenzhen, China

Yanwen Wang