Low-complexity cyclostationarity feature detection scheme of localized SC-FDMA uplink system for application to detect and avoid

A low-complexity cyclostationarity feature detection scheme is proposed in this paper. Such method is suitable for the detection of a localized Single-carrier Frequency Division Multiple Access (SC-FDMA) signal. SC-FDMA scheme is the candidate for the uplink of Long Term Evolution-Advanced (LTE-Advanced) system. The detection of the uplink signal is critical to the coexistence between UWB systems and LTE-Advanced systems. The proposed scheme requires low computational complexity at the cost of slight reduction in detection performance. Simulation results and computational complexity analysis indicate that the proposed scheme makes a tradeoff between detection performance and computational complexity. In a worse transmission environment, the low-complexity cyclostationarity feature detection can be utilized as a substitute for the energy detection since the later approach is sensitive to noise uncertainty and can not work well in such circumstance.