Systems and methods of testing a wireless network are provided. Simulated user data, spread across all user data sub-carriers of all sub-channels of a frequency band assigned for transmissions, is transmitted by a number of base stations surrounding a base station under test. The power level of the simulated user data is determined based on a selected network load. A mobile station receives signals from the base station under test and the number of base stations, and the interference caused by the simulated user data to the transmission from the base station under test is determined. When less than 100% loading is employed for testing, the sub-channels carrying the simulated user data can vary on a frame-by-frame basis.