摘要
The ubiquity of wireless communication systems has resulted in extensive concern regarding their security issues.A practical secure transmission scheme based on under-sampling spectrum-sparse signals is designed.Secure transmission is initialized as the intended receiver transmits a pilot signal for the transmitter,to perform channel sounding and clock synchronization according to the channel reciprocal principle.Then,sampling clock offset compensation and precoding method based on channel state information(CSI)can be conducted at the transmitter's end.Because the intended receiver adopts an under-sampling method based on active aliasing which depends very sensitively on accurate sampling clock and CSI,the eavesdroppers can hardly intercept the signal.Closed form expression of symbol error rate(SER)at the intended receiver's end and secrecy capacity in fading wiretap channel has been derived.Numerical evaluation and simulations are carried out to validate the effectiveness of the proposed strategy.
The ubiquity of wireless communication systems has resulted in extensive concern regarding their security issues.A practical secure transmission scheme based on under-sampling spectrum-sparse signals is designed. Secure transmission is initialized as the intended receiver transmits a pilot signal for the transmitter, to perform channel sounding and clock synchronization according to the channel reciprocal principle. Then, sampling clock offset compensation and precoding method based on channel state information(CSI) can be conducted at the transmitter’s end. Because the intended receiver adopts an under-sampling method based on active aliasing which depends very sensitively on accurate sampling clock and CSI, the eavesdroppers can hardly intercept the signal. Closed form expression of symbol error rate(SER) at the intended receiver’s end and secrecy capacity in fading wiretap channel has been derived. Numerical evaluation and simulations are carried out to validate the effectiveness of the proposed strategy.
