Receiver and receiving method using quadrature spatial modulation technology, and relevant wireless communication system

A method for receiving a signal in a wireless communication system, the method comprising:

• receiving a signal via a receiving antenna, the signal being transmitted from a transmitting end by using a quadrature spatial modulation QSM technology;
• demodulating a received signal to obtain a received complex symbol;
• and
• decoding the received complex symbol with a spherical decoding detection algorithm to obtain the signal that is transmitted, the decoding comprising:
• hierarchically calculating from bottom to top a radius of each layer for each constellation symbol in a given constellation symbol search space based on the received complex symbol;
• for an ith layer of the constellation symbol, discarding the constellation symbol if a calculated radius of the ith layer of the constellation symbol is greater than a minimum radius of the ith layer, otherwise updating the minimum radius of the ith layer according to the calculated radius of the ith layer of the constellation symbol, wherein i is a natural number in a range between Nr and 1, and Nr is a number of receiving antennas;
• and
• for each constellation symbol that is not discarded, taking a sum of the radii of respective layers of the constellation symbol as a radius of the constellation symbol, and selecting a constellation symbol with a smallest radius as a symbol obtained from the decoding.