 environments. The combined antenna pattern at angles off the cardinal axes is computed as -min[-A(A) + Ae(0)), Am]. The antenna bearing is defined as the angle between the main antenna lobe center and a line directed due east given in degrees. The bearing angle increases in a clockwise direction. The center directions of the main antenna lobe in each sector point to the corresponding side of the hexagon. For an indoor test environment, the BS is assumed to have an omni-directional antenna pattern. The mobile station is assumed to have omni-directional antennas. 12.8 LINK-LEVEL AND SYSTEM-LEVEL CHANNEL MODELS The wireless communication channel is modeled to allow realistic modeling of the propagation conditions for radio transmissions in different environments [15-20,26-38]. The channel models were required to cover all test environments and scenarios related to the IMT-Advanced evaluations. The ITU-R WP 5D specified channel models for the evaluation of IMT-Advanced candidate technologies which consisted of primary and extension modules. The framework of the primary module is based on the WINNER II channel model, iii which applies the same approach as the 3GPP/3GPP2 Spatial Channel Model (SCM). iv The extension module extends the capabilities of the IMT-Advanced channel model to cover additional deployment scenarios beyond that of IMT-Advanced candidate technology evaluations, allowing the use of modified parameters to generate large-scale parameters. The ITU-R WP 5D-specified channel model is a geometric stochastic model. It does not explicitly specify the "Information on WINNER II channel models can be found at http://www.ist-winner.org/deliverables.html information on 3GPP/3GPP2 Spatial Channel Model can be found in 3GPP TR 25.996 Spatial Channel Model for Multiple Input Multiple Output (MIMO), September 2003. TABLE 12-6 Baseline Configuration Parameters for IMT-Advanced Evaluations [6] Urban Micro-cellular (UMi) Urban Macro-cellular Rural Macro-cellular Simulation Parameters Indoor Hotspot (InH) Baseline Para