# Interfering systems SINR

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#### David83

Hello all,

I am studying two users which use BPSK modulation and interfering to each others. One use (n,1) repetition coding and the other is uncoded. What would be the signal-to-interference-plus-noise ratio (SINR) for both systems? Is it correct to say that the SINR for the coded system is:

${SINR}_c=\frac{{SNR}_c/n}{1+{SNR}_u}$

and that for uncoded system is

${SINR}_u=\frac{{SNR}_u}{1+\frac{{SNR}_c}{n}}$

where SNR_c and SNR_u is the interference-free energy per bit to noise power spectral density of the coded and uncoded user, respectively?

Thanks

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