A semiconductor structure includes a source drain region of a first material that may fulfill contact resistance and doping requirements and an extension region of a second material with increased mobility and dopant concentration. Different orthogonal codes are generated for different slots each including a plurality of SC-FDMA symbols in a subframe. The collector comprises an outer collector region and an inner collector region, a thickness of the outer collector region is greater than that of the inner region. After excess pressure is applied, the rocker arm assembly pivots relative to the roller track assembly to allow the downward pivotal movement of the basketball rim assembly.