Consider the uplink in a single hexagonal cell CDMA system, with a cell radius R = 1075 m. The users are uniformly distributed over the service area with 7 users/km2. The required...

Consider the uplink in a single hexagonal cell CDMA system, with a cell radius R = 1075 m. The users are uniformly distributed over the service area with 7 users/km2. The required signal-energy-to-noise-power-spectral-density ratio for good signal quality is (Eb/N0) = 7 dB and the system processing gain is 128. The path gain is modeled as G(d) = c0/dα, with d in meters, c0 = −30 dB, α = 3.5, and the noise power is N = −103 dBm. a) If ideal constant-received-power control is used, determine the minimum required received power that ensures the desired (Eb/N0) target for all the users. b) If the maximum transmitted power is limited to Pmax = 100 mW, determine the number of users that cannot reach the required signal quality. c) How many users can the system support such that good signal quality is ensured for all the users anywhere within the cell?