This paper presents a full wave simulation technique for modeling indoor propagation channels. A key feature of the technique is the use of a domain decomposition approach that accounts for repeatable components such as bricks, chairs, tables, etc. This leads to significant memory reduction, thus permitting the modeling of an entire classroom. Several simulations with different transmitting locations are presented and used to predict the
statistical profiles of the received signal strength. These profiles are subsequently used to evaluate the bit error rate for specific digital modulation schemes.