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CDMA Example

CDMA Example. Chih-Shun Hsu. Orthogonal Chip Codes. Decoding: M1 (1,1,1,1)*(0,0,4,0)=4>0 => 1 (1,1,1,1)*(0,0,0,-4)=-4<0 => 0 M2 (1,1,-1,-1)*(0,0,4,0)=-4<0 => 0 (1,1,-1,-1)*(0,0,0,-4)=4>0 => 1 M3 (1,-1,1,-1)*(0,0,4,0)=4>0 => 1 (1,-1,1,-1)*(0,0,0,-4)=4>0 => 1

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CDMA Example

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  1. CDMA Example Chih-Shun Hsu

  2. Orthogonal Chip Codes Decoding: M1 (1,1,1,1)*(0,0,4,0)=4>0 => 1 (1,1,1,1)*(0,0,0,-4)=-4<0 => 0 M2 (1,1,-1,-1)*(0,0,4,0)=-4<0 => 0 (1,1,-1,-1)*(0,0,0,-4)=4>0 => 1 M3 (1,-1,1,-1)*(0,0,4,0)=4>0 => 1 (1,-1,1,-1)*(0,0,0,-4)=4>0 => 1 M4 (1,-1,-1,1)*(0,0,4,0)=-4<0 => 0 (1,-1,-1,1)*(0,0,0,-4)=-4<0 =>0 2 codes 1 1 1 -1 4 codes 1 1 1 1 1 1 -1 -1 1 -1 1 -1 1 -1 -1 1 Coding: M1 10 -> 1 1 1 1 -1-1-1-1 M2 01 -> -1-1 1 1 1 1-1-1 M3 11 -> 1-1 1-1 1-1 1-1 M4 00 -> -1 1 1-1-1 1 1-1 Combined signal: 0 0 4 0 0 0 0 -4

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