Evaluation of extended CP and ultra-extended CP in MBSFN

Long Term Evolution (LTE) holds the promise to enhance the capacity and speed of mobile communication by supporting Multimedia Broadcast/Multicast Services (MBMS) over a single frequency network (MBSFN), where numerous cells transmit an identical waveform that is synchronized in time for a specific time interval. For improving the performance of SFN, ultra-extended cyclic prefix duration has been considered in this paper to account for the larger delay spread especially in rural and hilly areas. The performance of the network for both extended and ultra-extended CP has been compared in terms of an important parameter called the spectral efficiency. The suitable cell radius for optimum performance has also been investigated and the achieved simulated results justifies the need to opt for ultra-extended CP at the cost of reduced OFDM symbols per slot.