ACHIEVABLE RATE OPTIMIZATION METHOD FOR MULTIUSER MULTI-INPUT MULTI-OUTPUT TWO-WAY RELAYING COMMUNICATION SYSTEM

摘要

The present invention relates to a communications method which is capable of effectively increasing the communications capacity of a multiuser multi-input multi-output cellular communications system which provides two-way relay. According to the present invention, provided is a method for optimizing an achievement rate of the multiuser multi-input and multi-output two-way relay communications system which is capable of effectively increasing the communications capacity through the achievement rate optimization by solving the problem of not knowing the method of effectively increasing the communications capacity in an existing cellular communications system. Wherein, the improved cellular communications system includes one base station having a plurality of transmission and reception antenna systems, and a plurality of communications terminal nodes having one relay node and one transmission and reception antenna. [Reference numerals] (S21) Selecting N user terminal nodes corresponding to a number smaller between N_B and N_V and generating each channel matrix from a base station node to a relay node and from a user terminal node to a relay node; (S22) Generating a codeword vector to be transmitted from the user terminal node and the base station through grid encoding; (S23) Generating each encoding matrix showing a codeword vector to be transmitted from a k^th user terminal node to the base station through horizontal encoding of the user terminal nodes; (S24) Generating a transmission signal of the base station node through linearization encoding; (S25) Generating a transmission signal of the user terminal node; (S26) Generating a reception signal received in the relay node; (S27) Decoding each codeword using a horizontal successive interference cancellation from the received signal; (S28) Encoding the decoded signal in the relay node through a grid symbol, transmitting the signal to each of the base station node and user terminal node and receiving its own signal using the grid symbol from the each of the base station node and user terminal node; (S29) Optimizing the achievement rate of the entire communications system to make an achievement rate be the maximum which can be obtained through two-way relay