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Mathinline
body$C/I=\frac{C(j,k)}{I(j,k)}$
    q  (Eq. 46)

where C(j,k) is the received power at the k-th user from the serving BS, i.e., the j-th BS

                                                          

Mathinline
body$C(j,k)=P_{BS}^{UE}\times effective\_pathloss(B{{S}_{j}},U{{E}_{j,k}})$
 (Eq. 47)

and where  is the power of resource block and effective_pathloss is defined as in Section ‎7.6.1.

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Mathinline
body$I(j,k)={{I}_{\text{inter}}}(j,k)+{{I}_{ext}}(j,k)+N$
   (Eq. 48)

where


  • Iinter (j,k) is the adjacent cell interference (i.e. from the same victim system, i.e. denoted inter-system interference;
  • Iext(j,k) is the interference from external interfering system(s) in adjacent channel, i.e interference power into this resource block including ACIR;
  • N is the noise floor.

Mathinline
body${{I}_{\operatorname{int}er}}(j,k)=\sum\limits_{l=1,l\ne j}^{{{N}_{cell}}}{P_{BS}^{UE}\times effective\_pathloss(B{{S}_{l}},U{{E}_{j,k}})}$
       (Eq. 49)


Mathinline
body${{I}_{\text{ext}}}(j,k)=\sum\limits_{m=1}^{N}{iRS{{S}_{unwanted}}(IL{{T}_{m}},U{{E}_{j,k}})\times + iRS{{S}_{blocking}}}(IL{{T}_{m}},U{{E}_{j,k}})$
     (Eq. 50)

Iext(j,k) is the interference to the the victim UEj,k from N interfering link transmitters (ILT). Note that the ACIR (Adjacent Channel Interference Ratio) is implicitly taken into account when both unwanted and blocking mechanism are summed in the computation. The unwanted and blocking are defined as follow

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for each of the victim UEj,k’s frequency where the DL information is received. The ILT can be any generic systems or a BS/UEs of a cellular system.

                         (Eq. 52)

at the victim system frequency. Where NRB is the number of RBs (i.e. subcarriers) requested per UE, and M is the maximum number of RBs per BS.


                               (Eq. 53)


where NoiseFigureUE is the noise figure of a UE.