Multicast transmit beamforming method and system based on angle information
A shaping and angle technology, applied in diversity/multi-antenna systems, space transmit diversity and other directions, can solve the problem that the base station cannot obtain the target user channel information in time, avoid complete channel information transmission mechanism, reduce interference, and make small changes. Effect
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[0029] The invention can be applied to the group transmission service of a single base station and a single group in the TD-SCDMA trunking communication system, and can also be applied in other multicast transmission services of a single base station and a single group. The application effect of the present invention is better when the radio wave propagation environment has a direct line of sight (LOS, Line of Sight). A scenario where the present invention is applicable is taken as an example below to describe in detail. like figure 1 As shown, the main lobe of the beam formed in various directions is demonstrated.
[0030] In a cell of a TD-SCDMA trunking communication system equipped with smart antennas, the users of a group are distributed concentratedly in four main directions, and the base station uses angle-based multicast transmit beamforming to form Shape the main lobe, so that the energy is concentrated in the angle range where the user is located, and the receiving...
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