A base station capable of communicating with a plurality of subscriber stations is configured to allocate a plurality of resource units to at least one subscriber station. The base station includes a controller configured to allocate a plurality of resource units from a two-dimensional logical matrix of resource units. The controller is configured to generate at least two indicator values, wherein the two indicator values are configured to identify the allocated resource units. The base station also includes a transmitter configured to transmit the two indicators to the subscriber station. The base station also is configured to construct the two-dimensional logical matrix that is adapted to enable contiguous and diverse resource unit allocations.