Dear Lomax,
The RRH does not fit in what you want to implement. For an LTE-A HetNet consisitng of macro-pico base stations, you can use the launcher file of femtocells. The femtocell implementation is quite general and allows for easy modifications such as: you can change the number, distribution and position of small cell (pico or femto) base station, transmit power, macroscopic pathloss model used, you can set the pico-cells to open subscriber mode (OSG) and so forth.
Best regards,
Fjolla