Method of interference cancellation based on smart antenna

An interference cancellation method for a smart antenna comprising the steps of:

• a) implementing beam formation for output digital signals of a receiver adopting a smart antenna using a beam forming matrix provided by a real time beam forming algorithm and obtaining a set of digital signals represented as NRk(m) after beam forming, wherein k represents code channels and m represents sample points;
• b) canceling the main path signal of other users included in the set of digital signals NRk(m) to provide another set of digital signals represented as NSk(m), which includes needed signals and all interference signals, wherein k represents code channels and m represents sample points;
• c) searching digital signals NSk(m) to provide all multipath signals distributed in the direction of the beam;
• d) canceling multipath interference signals coming from other users in the digital signals NSk(m);
• and
• e) superposing main path and multiple path signals of working user terminals in phase coincidence to provide a digital signal with interference canceled.