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EURASIP Journal on Wireless Communications and Networking
Fig. 5 | EURASIP Journal on Wireless Communications and Networking

Fig. 5

From: Design of adaptive constellations and error protection coding for wireless network coding in 5-node butterfly networks

Fig. 5

Setup for HW evaluation (Ettus Research USRPs). Source transmissions are prerotated [23–25] to imitate the AWGN channel conditions (as used in the numerical evaluation). To allow a strict control of HSI channels SNR in the HW setup, the HSI channels are emulated by adding a Gaussian noise to the respective source signal and the resulting emulated HSI is passed to destinations via UDP. This also avoids the problem of node visibility where direct links S A →D A and S B →D B exist in the laboratory environment

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