Patent ID: 8335288

Claim:
A method for communication comprising: generating a first signal for timing synchronization; generating a second signal for timing synchronization, which is different from the first signal; converting frequencies of the first signal and the second signal to other frequencies to obtain a first RF signal and a second RF signal, which have a specific frequency gap therebetween; combining the first RF signal and the second RF signal to obtain a transmission signal; transmitting the transmission signal; receiving the transmission signal as a received signal; shifting the frequency of the received signal by the specific frequency gap to obtain a converted signal; calculating a complex conjugation of the converted signal to obtain a complex conjugation signal; multiplying the received signal and the complex conjugation signal to obtain a multiplication signal; calculating cross-correlation between a product of the first and second signals and the multiplication signal; and detecting a peak of the cross-correlation to set a base time for timing synchronization.