Study on Different Array Allocation for Simultaneous Transmit and Receive Used in Phased Array

For the application of the full-duplex (FD) method in the phased array of a large number of units, the adaptive path identification method is used to model the coupling path characteristics of different spatial links. In the actual experiment, the representative array geometries are allocated and the effects on emission and reception are studied. From the experiments results, for a linear sub-array for transmission and different positional elements for reception, the performance of self-interference cancellation, i.e., the residual self-interference discrepancy between the best result and the worst is more about 10dB. Therefore, we can draw the conclusion that, specific subarray configuration for transmission and certain positional elements for reception play an important role on self-interference cancellation for simultaneous transmit and receive (STAR). Moreover, there exists a tradeoff between different sub-array's allocation and adaptive signal processing, because the sub-array's configuration for spatial suppression and the adaptive signal processing for active cancellation influence each other on SI suppression.