Patent ID: 7257077

Claim:
A process for recognizing active code sequences in mobile radio systems amongst a plurality of combined code sequences (c a (v)·g a ) to minimize erroneous or failed detection from inactive code sequences, wherein the active code sequences exhibit greater gain factors (g a ) than do the inactive code sequences, the process comprising: receiving the combined code sequences; forming a cost function (L) dependent upon unknown but estimated values ({tilde over (g)} a , ĝ a ) of the gain factors (g a ) of the combined code sequences (c a (v)·g a ); partially differentiating the cost function (L) in accord with the unknown estimated values ({tilde over (g)} a , ĝ a ) of the gain factors (g a ); forming a correlation system from an assumption that all partial differentiations of the cost function (L) are zero and thus a minimum of the cost function (L) exists; determining optimal estimated values ({tilde over (g)} a , ĝ a ) of the gain factors (g a ) by solving equation systems; storing the optimal estimated values ({tilde over (g)} a , ĝ a ); comparing the saved optimal estimated values ({tilde over (g)} a , ĝ a ) of the corresponding gain factors (g a ) to a specified threshold; classifying any of the received combined code sequences as active code sequences when the saved optimal estimated values ({tilde over (g)} a , ĝ a ) of the corresponding gain factors (g a ) are greater than the specified thresholds; and conveying the classified active code sequences from the combined code sequences for communication based on data areas corresponding to only the classified active code sequences and thus minimizing erroneous or failed detection from inactive code sequences.