Method of realizing smart antenna based on software radio and system therefor

摘要

A method of realizing smart antenna based on software radio and system therefore in IMT-2000 CDMA system. Channel conditions are classified according to the features of wireless communication channel conditions, covariance matrix of array receiving signals is step-by-step dimension-reduced and decorrelated using special smoothing differential processing method, obtaining the structure related to the receiving signals by gradually converting correlated signal into independent signal sources and realizing conditions recognition, and respectively calculating receiving weights and transmitting weights using corresponding receiving adaptive beam forming algorithm and transmitting adaptive beam forming algorithm selected according to the result of channel condition classifying. By using adaptive beam forming method of smart antenna based on software radio, the present invention has the following advantages comparing with existing adaptive beam forming method: good adaptability, avoidance of the limitation of single adaptive beam forming method, easiness of upgrading and maintaining based station system, and effective suppression of disturbing effect.