Detection method for space modulation signal

The invention provides a detection method for a space modulation signal, and belongs to the field of antenna transmission. The traditional particle swarm optimization has problems that the particle species number is quickly reduced and the convergence performance is reduced along with the increasing of iteration times in a space modulation signal detection procedure. The detection method for the space modulation signal comprises the following steps: during each iteration, mapping the position of each particle to a space according to space modulation characteristics, calculating a fitness function value capable of reflecting good or bad performances of the particles; comparing the fitness function value of a current particle with a self optimal fitness function value of a history particle, wherein the minimum value is utilized as a newest global optimal value; updating positions and speeds of the particles by learning an optimal particle of a particle swarm and learning all the particles with the relatively good performances in the particle swarm; and after iteration calculation reaches the maximum time, outputting a global optimal position corresponding to a final global optimal value as a detection symbol, namely the detection symbol corresponding to a receiving symbol.