There are four stations communicating using CDMA (code division multiple access). The code assigned to each station is as follow: (b) D: (+1-1 +1-1) At the receiving end, a signal (+2 +2 +2 -2) (0 0 0 +4) (0 +4 0 0) (+2 -2 +2 +2) is received. Determine what data are sent by each station (4 marks) There are four stations communicating using CDMA (code division multiple access). The code assigned to each station is as follow: (b) D: (+1-1 +1-1) At the receiving end, a signal (+2 +2 +2 -2) (0 0 0 +4) (0 +4 0 0) (+2 -2 +2 +2) is received. Determine what data are sent by each station (4 marks)