In a CDMA network, assume there are four stations A, B, C, and D with their chip sequences, shown in Fig. 1. Fig. 2 shows four cases of four stations transmitting at the same time. Show the transmitted sequences S1 to S4 and how DSSS does the recovery at receiver.

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A: 00011011 A B C D B: 00101110||- 1 C sent 1 B & C sent 1 A sent 1 & B sent 0 1 1 0 1 A sent 1, B sent 1, C sent 0 & D sent 1 C: 01011100-1 D: 0100001010 Fig 1: bit sequence 1 Fig. 2 transmition details A: 00011011 A B C D B: 00101110||- 1 C sent 1 B & C sent 1 A sent 1 & B sent 0 1 1 0 1 A sent 1, B sent 1, C sent 0 & D sent 1 C: 01011100-1 D: 0100001010 Fig 1: bit sequence 1 Fig. 2 transmition details