Abstract

Aiming at the application of full-duplex (FD) method in phased array for different kinds of waveforms for different functions, based on the modeling of coupling path characteristics for different spatial links using adaptive system identification method, five representative waveforms, including linear frequency modulation (LFM), pseudorandom frequency shift keying (FSK), continuous phase frequency shift keying (CPFSK), dense repeated jamming (DRJ), and wide-band noise (WBN), are designed and applied in full-duplex mode to validate their self-interference cancellation (SIC) performance in practical experiments. From the experiments' results, where the best SIC is about 38dB for LFM, while the worst SIC is just 5∼7dB for DRJ and WBN, we can draw the conclusion that different kinds of waveforms used for different functions can bring on obviously inconsistent SIC, even in the same frequency bandwidth of 300MHz. Thus it can be seen that waveform characteristics used in multifunction phased array play an important role for self-interference cancellation of simultaneous transmit and receive (STAR).

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