Symbol detection method for mimo systems based on path finding

A symbol detection method for an MIMO (Multiple-Input Multiple-Output) system based on path finding, wherein the MIMO system is arranged behind a plurality of sending terminals to receive and analyze baseband signals from the sending terminals, the symbol detection method comprises steps of:

• S1:
• signal filtering, wherein the baseband signals are detected and then filtered by filter units matching the sending terminals to select a required band;
• S2:
• preprocessing, wherein the required band is preprocessed through a preprocessing unit and then undertaken a signal detection of an MACO (Modified Ant Colony Optimization) algorithm;
• S3:
• parameter setting, wherein parameters of the MACO algorithm are set in a parameter setting unit;
• S4:
• calculation, wherein the parameters in the parameter setting unit are input to a solution construction unit to calculate solutions of signals;
• S5:
• parameter updating, wherein the parameters calculated by path probability are sent back to the parameter setting unit to update the parameters;
• and
• S6:
• completing signal solution calculation.