Antenna modulation method applicable to wireless transmitter and transmitter using the same

A transmitter comprising:

• an antenna array comprising a first antenna and a second antenna among a plurality of antennas;
• a communication unit coupled to the antenna array for converting from a digital baseband signal to an analog radio frequency signal;
• and
• a processing unit coupled to the communication unit and is configured for:
• receiving a data segment represented by a bit stream;
• converting the bit stream into a multi-dimensional coordinate comprising a first dimension and a second dimension;
• generating a first vector having a plurality of first elements according to the first dimension of the multi-dimensional coordinate, wherein the number of the first elements and the number of the antennas are identical, the first elements comprises at least a first entry and a second entry, and at least one of the first entry and the second entry of the first vector is set to a first non-zero entry;
• generating a second vector having a plurality of second elements according to the second dimension of the multi-dimensional coordinate, wherein the number of the second elements and the number of the antennas are identical, the second elements comprises at least a third entry and a forth entry, and at least one of the third entry and the forth entry of the second vector is set to a second non-zero entry, wherein the absolute phase difference between the first non-zero entry and the second non-zero entry is greater than 0 degree;
• generating a third vector having a plurality of third elements by summing the first vector and the second vector, wherein the number of the third elements and the number of the antennas are identical, the third elements comprises at least a fifth entry and a sixth entry, the fifth entry of the third vector map to the first antenna among the antennas, and the sixth entry of the third vector map to the second antenna among the antennas;
• and
• controlling the communication unit to activate at least one of the first antenna and the second antennas and emitting waveforms according to one or more non-zero entries of the third vector for transmitting the data segment during one signalling interval.