The invention discloses a method and
system for realizing high-security fast frequency-hopping transmission. According to the method, during the transmission of data, a transmitting terminal carries out bit, modulation mode and power distribution on
subcarrier clusters of data to be transmitted according to carrier frequency-hopping information specified by a
current time slot, then, all
subcarrier data are transmitted to a receiving terminal through digital-to-analog (D / A) conversion after all of the
subcarrier data are mapped to a
time domain by using an IFFT (Inverse
Fast Fourier Transform) method, and the
processing process of the receiving terminal is an inverse process of the transmitting terminal. The
system disclosed by the invention comprises a carrier frequency-hopping information generation device, a subcarrier data dynamic allocation device, a subcarrier data dynamic
demodulation device, an IFFT module, an FFT (
Fast Fourier Transform) module, a D / A converter, an analog-to-digital (A / D) converter, a transmitting module and a receiving module. The frequency-hopping
system disclosed by the invention has the advantages that a frequency hopping rate much higher than that of the conventional single-carrier frequency-hopping communication system can be generated, the concealment performance of frequency-hopping signals is high, the anti-interception capacity is strong, and the availability of a communication system is high. Meanwhile, according to the method and the system for realizing the high-security fast frequency-hopping transmission, the
utilization rate of a
wireless spectrum is increased because a plurality of subcarriers are used for simultaneous transmission.