Consider the uplink of a DS-CDMA system with base stations having omni-directional antennas and…
Consider the uplink of a DS-CDMA system with base stations having omni-directional antennas and employing perfect received power control and voice activity detection with a voice activity factor q = 0.5. The number of users within the system is Poisson distributed with a mean of 8 users/cell. Inter-cell interference can be considered to be about 60% of own cell interference. The system is designed to operate properly at a load L = 50%.
a) Determine the pole capacity Mp of this system if the assignment failure rate should not exceed 20%.
b) Determine the assignment failure rate if the CDMA system employs directional antennas with the antenna diagram shown in Figure 5.20 and base stations placed on the corners of the cells.