Code Division Multiple Access (CDMA) used in several wireless broadcast channels (cellular,satellite,etc)standards unique "code"assigned to each user;i.e.,code set partitioning all users share same freguency,but each user has own "chipping"sequence (i.e.,code)to encode data encoded signal (original data)X(chipping sequence) decoding:inner-product of encoded signal and chipping sequence allows multiple users to "coexist"and transmit simultaneously with minimal interference (if codes are "orthogonal") 6:Wireless and Mobile Networks 6-126: Wireless and Mobile Networks 6-12 Code Division Multiple Access (CDMA)  used in several wireless broadcast channels (cellular, satellite, etc) standards  unique “code” assigned to each user; i.e., code set partitioning  all users share same frequency, but each user has own “chipping” sequence (i.e., code) to encode data  encoded signal = (original data) X (chipping sequence)  decoding: inner-product of encoded signal and chipping sequence  allows multiple users to “coexist” and transmit simultaneously with minimal interference (if codes are “orthogonal”)