TY - BOOK AU - Nelly Muhammad Hussein Muhammad Shafik AU - Abdelwahab Fayez Hassan Hussein , AU - Adel Mahmoud Saad Eldin Elsherif , TI - A modified STBC OFDM - CDMA system through multipath frequency selective fast fading channel / PY - 2009/// CY - Cairo : PB - Nelly Muhammad Hussein Muhammad Shafik , KW - CDMA KW - OFDM KW - STBC N1 - Thesis (Ph.D .) - Cairo University - Faculty of Engineering - Department of Electronics and Communication; Issued also as CD N2 - Three efficient techniques have been joined together in this thesis in order to mitigate distortion resulting from propagating through multipath fading channels . These techniques are orthogonal frequency division multipexing (OFDM ) code division multipe access (CDMA ) and space tim- block coding (STBC ) . The proposed STBC OFDM - CDMA system can mitigate performance degradation caused by multipath fading channels in its worst form which is the frequency selective fast fading ER -