the distance between the MS, the BS d, and the LoS directions with respect to the BS and MS, OBS and AMS, can be determined. Note that OBS and AMS are defined relative to the broadside directions. The MS antenna array orientations OMS are independent and identically distributed, and are obtained from a uniform 0-360° distribution. The generic MIMO channel model is a stochastic model with two levels of unpredictability; large-scale parameters such as shadow fading, delay, and angular spreads that are drawn randomly from tabulated distribution functions, and small-scale parameters such as delay, power, and direction of arrival and departure that are selected randomly according to tabulated distri- bution functions and large-scale parameters. An infinite number of different realizations of the channel model can be generated randomly by selecting different initial phases for the scattering objects. The generic model is based on the drop concept. The system-level simulation is performed in a sequence of "drops," where a "drop" is defined as one simulation run over a certain time period when using the generic model. A drop (or snapshot of a channel segment) is a simulation instance where the random properties of the channel remain constant except for the fast-fading caused by the changing phases of the rays. The constant properties during a single drop are the power, delay, and direction of the rays. In a simulation, the number and the length of drops are selected based on the evaluation requirements and the deployment scenario. The generic model allows the simulation of several statistically-independent drops in order to obtain a statistical representation of system performance. The channel model parameters for evaluation of IMT-Advanced technologies in various test envi- ronments are shown in Table 12-7. 12.9 IEEE 802.16M LINK-LEVEL AND SYSTEM-LEVEL PERFORMANCE In order to comply with the requirements of the ITU-R IMT-Advanced, the performance of the IEEE 802.16m standard was comprehensively evaluated based on the ev