A communications method performed by a base station, comprising a processing module and a transmit module, in an LTE system, wherein the method comprises: • dividing, by the processing module, a coverage area of a first antenna into two cells, wherein the base station has at least one antenna, and the first antenna is any one of the at least one antenna and the first antenna is a 8-channel antenna (S 101); • performing, by the processing module, weighted processing on data carried on time-frequency resources of the two cells, to map the data carried on the time-frequency resources of the two cells to the eight channels of the 8-channel antenna by using the following formula: Y 0 n s k l Y 1 n s k l Y 2 n s k l Y 3 n s k l Y 4 n s k l Y 5 n s k l Y 6 n s k l Y 7 n s k l = w 0 ⁢ R w 0 ⁢ L 0 0 w 1 ⁢ R w 1 ⁢ L 0 0 w 2 ⁢ R w 2 ⁢ L 0 0 w 3 ⁢ R w 3 ⁢ L 0 0 0 0 w 4 ⁢ R w 4 ⁢ L 0 0 w 5 ⁢ R w 5 ⁢ L 0 0 w 6 ⁢ R w 6 ⁢ L 0 0 w 7 ⁢ R w 7 ⁢ L 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 P sector 0 0 n s k l P sector 1 0 n s k l P sector 0 1 n s k l P sector 1 1 n s k l, where (n s, k, l) is an index of a time-frequency resource block, n s represents a timeslot, k represents a carrier, 1 represents a symbol, and a resource block can be uniquely identified by using the index (n s, k, l); Y i (n s,k,l) represents data of an i th channel corresponding to the time-frequency resource block (n s, k, l), n is a cell label, Sector n represents a cell n, and P sector n m n s k l represents data sent by a port m of the cell n, wherein a port of a cell refers to a logical port that is configured to send a reference signal of the cell, wherein w 0 ⁢ R w 1 ⁢ R w 2 ⁢ R w 3 ⁢ R and w 4 ⁢ R w 5 ⁢ R w 6 ⁢ R w 7 ⁢ R represent beam weights of a cell o and the beam weights of the cell o form a first cell beam weight vector used to form a directional beam covering the cell o; and w 0 ⁢ L w 1 ⁢ L w 2 ⁢ L w 3 ⁢ L and w 4 ⁢ L w 5 ⁢ L w 6 ⁢ L w 7 ⁢ L represent beam weights of a cell 1 and the beam weights of cell 1 form a second cell beam weight vector used to form a directional beam covering the cell 1; • combining, by the processing module, the data Y i (n s, k, l) of all eight channels to obtain combined data (S 103); and • transmitting, by the transmit module, two directional beams by using the first antenna, wherein the two directional beams are used to send the combined data, the two directional beams have different directions, wherein a first directional beam of the two directional beams is the directional beam covering the cell o and a second directional beam of the two directional beams is the directional beam covering the cell 1 (S 104). • dividing, by the processing module, a coverage area of a first antenna into two cells, wherein the base station has at least one antenna, and the first antenna is any one of the at least one antenna and the first antenna is a 8-channel antenna (S 101); • performing, by the processing module, weighted processing on data carried on time-frequency resources of the two cells, to map the data carried on the time-frequency resources of the two cells to the eight channels of the 8-channel antenna by using the following formula: Y 0 n s k l Y 1 n s k l Y 2 n s k l Y 3 n s k l Y 4 n s k l Y 5 n s k l Y 6 n s k l Y 7 n s k l = w 0 ⁢ R w 0 ⁢ L 0 0 w 1 ⁢ R w 1 ⁢ L 0 0 w 2 ⁢ R w 2 ⁢ L 0 0 w 3 ⁢ R w 3 ⁢ L 0 0 0 0 w 4 ⁢ R w 4 ⁢ L 0 0 w 5 ⁢ R w 5 ⁢ L 0 0 w 6 ⁢ R w 6 ⁢ L 0 0 w 7 ⁢ R w 7 ⁢ L 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 P sector 0 0 n s k l P sector 1 0 n s k l P sector 0 1 n s k l P sector 1 1 n s k l, where (n s, k, l) is an index of a time-frequency resource block, n s represents a timeslot, k represents a carrier, 1 represents a symbol, and a resource block can be uniquely identified by using the index (n s, k, l); Y i (n s,k,l) represents data of an i th channel corresponding to the time-frequency resource block (n s, k, l), n is a cell label, Sector n represents a cell n, and P sector n m n s k l represents data sent by a port m of the cell n, wherein a port of a cell refers to a logical port that is configured to send a reference signal of the cell, wherein w 0 ⁢ R w 1 ⁢ R w 2 ⁢ R w 3 ⁢ R and w 4 ⁢ R w 5 ⁢ R w 6 ⁢ R w 7 ⁢ R represent beam weights of a cell o and the beam weights of the cell o form a first cell beam weight vector used to form a directional beam covering the cell o; and w 0 ⁢ L w 1 ⁢ L w 2 ⁢ L w 3 ⁢ L and w 4 ⁢ L w 5 ⁢ L w 6 ⁢ L w 7 ⁢ L represent beam weights of a cell 1 and the beam weights of cell 1 form a second cell beam weight vector used to form a directional beam covering the cell 1; • combining, by the processing module, the data Y i (n s, k, l) of all eight channels to obtain combined data (S 103); and • transmitting, by the transmit module, two directional beams by using the first antenna, wherein the two directional beams are used to send the combined data, the two directional beams have different directions, wherein a first directional beam of the two directional beams is the directional beam covering the cell o and a second directional beam of the two directional beams is the directional beam covering the cell 1 (S 104).