Patent ID: 7257077
Filing Date: 2007-08-14
Classification: H04B,H04J

Abstract:
1. 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)} partially differentiating the cost function (L) in accord with the unknown estimated values ({tilde over (g)} 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)} storing the optimal estimated values ({tilde over (g)} comparing the saved optimal estimated values ({tilde over (g)} classifying any of the received combined code sequences as active code sequences when the saved optimal estimated values ({tilde over (g)} 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.