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EURASIP Journal on Advances in Signal Processing
Figure 6 | EURASIP Journal on Advances in Signal Processing

Figure 6

From: Performance evaluation of variable transmission rate OFDM systems via network source coding

Figure 6

The performance of the proposed VTR-MB-OFDM communications system in the AWGN channel using two different mapping functions. (a) f ̂ 1 (·) with switch configurations [S 1 S 2 S 3 S 4] = [0 0 x x]. (b) f ̂ 1 (·) with switch configurations [S 1 S 2 S 3 S 4] = [0 1 x x]. (c) f ̂ 1 (·) with switch configurations [S 1 S 2 S 3 S 4] = [1 0 x x]. (d) f ̂ 1 (·) with switch configurations [S 1 S 2 S 3 S 4] = [1 1 x x]. (e) f ̂ 2 (·) with switch configurations [S 1 S 2 S 3 S 4] = [0 0 x x]. (f) f ̂ 2 (·) with switch configurations [S 1 S 2 S 3 S 4] = [0 1 x x]. (g) f ̂ 2 (·) with switch configurations [S 1 S 2 S 3 S 4] = [1 0 x x]. (h) f ̂ 2 (·) with switch configurations [S 1 S 2 S 3 S 4] = [1 1 x x]. ’x’ means ’0’ or ’1’. From Figure 6a–d, effects caused by 16 different switch configurations to the system performance using the mapping function f ̂ 1 (·) are evaluated, and then we also evaluate the effects caused by 16 different switch configurations using the mapping function f ̂ 2 (·) to the system performance in Figure 6e– h.

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