Multi-user mimo method, apparatus and communication system for transmitting signal
AssigneeHuawei Technologies Co., Ltd.
InventorsLuxi YANG, Daofeng XU, Bin LI
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Abstract
A multi-user multi-input multi-output (MIMO) method for transmitting signal with a includes: performing a Tomlinson-Harashima pre-coding (THP) on raw data; decomposing a channel matrix to a product of a block triangular matrix and a unitary matrix, and generating a signal to be transmitted by performing a forward filtering on the THP coded data by using the unitary matrix. A multi-user MIMO apparatus for transmitting signal includes an interference pre-eliminating unit, a modulo unit, a forward filtering unit, and a channel matrix decomposing unit. A multi-user MIMO communication system is further provided.
Claims18
A multi-user multi-input multi-output (MIMO) method for transmitting signals, comprising:
- performing a Tomlinson-Harashima pre-coding (THP) on raw data;
- decomposing a channel matrix to a product of a block triangular matrix and a unitary matrix;
- and
- generating a signal to be transmitted by performing a forward filtering on the THP coded data by using the unitary matrix.
A multi-user multi-input multi-output (MIMO) apparatus for transmitting signals, comprising:
- a channel matrix decomposing unit adapted to decompose a channel matrix to a product of a block triangular matrix, and to transmit the product;
- and
- the forward filtering unit adapted to receive the product, obtain the unitary matrix, perform a forward filtering on data to obtain a signal to be transmitted by using the unitary matrix, and output the signal.
A multi-user multi-input multi-output (MIMO) communication system, comprising:
- a transmitting end adapted to perform a Tomlinson-Harashima pre-coding (THP) on raw data, to decompose a channel matrix associated with a channel to a product of a block triangular matrix and a unitary matrix, to perform a forward filtering on the THP coded data by using the unitary matrix to obtain a signal to be transmitted, and transmit the signal through the channel;
- a plurality of receiving ends for receiving the signal, the plurality of receiving ends having a kth receiving end adapted to pre-filter the received signal by utilizing a unitary matrix UkH, to perform an estimation by utilizing a diagonal matrix Dk−1, to perform a modulo operation and to recover the raw data through making decision,
- wherein Uk and Dk satisfy Lk=UkDk, Lk is a kth sub-matrix on a diagonal line of the block triangular matrix and k is an index number indicative of a kth user of multiple users.
Dependencies are inferred from the claim text.