Is the cyclic prefix necessary?

Details Is the cyclic prefix necessary? Is the cyclic prefix necessary?

2006-11-14

arxiv.org/abs/cs/0611059v1

Computer Science

Information Theory

12 pages, 1 figure. Appeared in part in the Proceedings of International Symposium on Information Theory (ISIT), Seattle, WA,

Scientific paper

We show that one can do away with the cyclic prefix (CP) for SC-FDE and OFDM at the cost of a moderate increase in the complexity of a DFT-based receiver. Such an approach effectively deals with the decrease in the number of channel uses due to the introduction of the CP. It is shown that the SINR for SC-FDE remains the same asymptotically with the proposed receiver without CP as that of the conventional receiver with CP. The results are shown for $N_t$ transmit antennas and $N_r$ receive antennas where $N_r \geq N_t$.

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