Physical layer multicast and multi-stream data transmitting method based on Givens rotation
A transmission method and physical layer technology, applied in the field of multiple-input multiple-output (MIMO) broadband wireless and mobile communications, can solve the problems of inability to obtain a precoding matrix, no available multicast multi-stream transmission method, etc., to improve transmission quality, Improved SNR fairness, simplified implementation effect
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[0020] In this embodiment, the base station is configured with 4 transmitting antennas, the multicast group contains 2 users, and each user is configured with 4 receiving antennas as an example, to specifically illustrate the use of the physical layer multicast and multi-stream based on Givens rotation of the present invention The operation process of the data transfer method and its performance.
[0021] In this embodiment, it is assumed that the base station is configured with the number of transmitting antennas M=4, the transmitted symbols come from the quadrature phase shift keying (QPSK) modulation constellation diagram, and the total transmitted power P 0 =1, the number of users in the multicast user group is K=2, and the number of receiving antennas configured for each user is N=4. The noise variance of each user channel is 1. The known channel matrix of each user at the base station is as follows:
[0022] H 1 = ...
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