A pairing method for users in a virtual multiple-input multiple-output system
A multi-output, multi-input technology, applied in diversity/multi-antenna systems, space transmit diversity, error prevention/detection through diversity reception, etc., can solve the problems of not considering the overall stability factor and the overall transmission instability of the system, etc. Achieve the effect of increasing the total channel capacity and stable data transmission
Active Publication Date: 2016-03-02
SOUTH CHINA UNIV OF TECH
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Problems solved by technology
In the existing user pairing algorithms of the virtual MIMO system, the optimal pairing of a single user in different environments is studied, and the overall stability factors are not considered, which will cause the overall transmission instability of the system
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[0033] Such as Figures 1 to 3 As shown, the method for pairing users in the virtual MIMO system of this embodiment includes the following steps, wherein the virtual MIMO system of this embodiment includes 5 users;
[0034] (1) Obtain the channel information of 5 users in the V-MIMO system, calculate the channel capacity when each user in the system is paired with the other 4 users, and store the channel capacity value as figure 2 In a 5×5 pairing capacity matrix shown in the figure, row i and column j in the pairing capacity matrix represent the channel capacity values after pairing between user i and user j, and the diagonal line of the pairing capacity matrix represents the channel capacity value after pairing between users themselves. The channel capacity value of , since each user in the system wants to pair transmission, the channel capacity value on the diagonal of the pairing capacity matrix is 0, the channel capacity value of the i-th user and the j-th user after...
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The invention discloses a user pairing method for a V-MIMO (virtual multi-input multi-output) system. The user pairing method comprises the following steps: (1) user channel information is acquired, and a pairing capacity matrix is established; (2) a pairing order matrix is established according to the pairing capacity matrix; (3) each user transmits a pairing request to a user with the pairing channel capacity value in the first order; (4) whether a user receiving multiple pairing requests exists in the system is judged, if so, step (5) is executed; if not, step (7) is executed; (5) the user receiving multiple pairing requests sends reject requests to the users with non-highest orders according to the pairing order matrix; (6) each user receiving the reject request sends a pairing request to a user with the next order, and the step (4) is executed; and (7) users sending pairing requests to each other without sending reject requests to each other are paired. With the user pairing method, a stable user pairing combination is obtained, the data transmission of the system is enabled to be more stable, and the capacity is enabled to be higher.
Description
technical field [0001] The present invention relates to the technical field of multiple-input multiple-output (MIMO) of wireless communication, and in particular to a user pairing method in a virtual multiple-input multiple-output (Virtual MIMO, V-MIMO) system. Background technique [0002] Multiple-input multiple-output (MIMO) technology has attracted widespread attention because it can significantly improve system capacity and spectrum efficiency, and is one of the key technologies for next-generation mobile communications. One of the main advantages of the MIMO technology is that the user data is transmitted by using multiple antenna configurations at the receiving end and the transmitting end, and then resource multiplexing on the same time / frequency channel is realized. In a wireless communication system using MIMO, the capacity of the system can be proportional to the number of receiving or generating antennas, and is significantly higher than that of a single-input-si...
Claims
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IPC IPC(8): H04L1/06H04B7/04
Inventor 官权升傅子维季飞姜胜明
Owner SOUTH CHINA UNIV OF TECH