[C] (6 points) Consider a cellular system that can accept a signal-to-interference ratio of 15dB. Assume that a hexagonal cell pattern is used. The signal-to-interference ratio cab be calculated by the following equation: C/R)" where: . is the signal-to-interference ratio, D/R is the co-channel reuse ratio (where D= minimum distance between centers of the co-channels, and R = radius of a cell), nis the path loss exponent, and co is the number of co-channel interfering cells. For n= 4, find the reuse factor N when: 1. Omnidirectional antenna is used. 2. 120 sectoring is used. 3. 60 sectoring is used. [C] (6 points) Consider a cellular system that can accept a signal-to-interference ratio of 15dB. Assume that a hexagonal cell pattern is used. The signal-to-interference ratio cab be calculated by the following equation: C/R)" where: . is the signal-to-interference ratio, D/R is the co-channel reuse ratio (where D= minimum distance between centers of the co-channels, and R = radius of a cell), nis the path loss exponent, and co is the number of co-channel interfering cells. For n= 4, find the reuse factor N when: 1. Omnidirectional antenna is used. 2. 120 sectoring is used. 3. 60 sectoring is used