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In this reported work, the frequency diverse array concept is employed to construct an orthogonal frequency-division multiplexing (OFDM) transmitter that has the capability of securing wireless communication in free space directly in the physical-layer without the need for mathematical encryption. The characteristics of the proposed scheme in terms of its secrecy performance are validated via bit...
An efficient and low-complexity clipping estimation and compensation scheme is presented. With clipped signals estimated from two different signal sources and accurately identified phase information, the proposed scheme can improve the system performance significantly.
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