A power-saving single-carrier frequency domain equalization system

Single-carrier frequency domain equalization (SC-FDE) systems, which offer comparable complexity and performance to orthogonal frequency division multiplexing (OFDM) systems with a lower peak-to-average power ratio (PAPR), is a promising technique in future generation of wireless communications. An improved SC-FDE system is proposed, in which the cyclic prefix (CP) is only inserted in front of even frames so that the proposed SC-FDE systems can enjoy higher power efficiency as well as save the sent power of the transmitter, compared to conventional SC-FDE systems. In the receiver, the even frames are detected using the conventional FDE technique while two approaches named overlap-save (OLS) FDE and overlap-add (OLA) FDE are proposed to detect the odd frames. Simulation results show that the proposed OLS FDE receiver can achieve the same symbol error rate (SER) as the conventional SC-FDE system.