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From here, we will demonstrate that the proposed method is actually feasible through actual machine experiments.
As a situation of an actual machine experiment, we consider that two APs apply the proposed method to perform Co-MIMO communication and full-duplex wireless communication at the same time.
Each AP has two transmitting antennas and two receiving antennas. Then, the self-interference cancellation by the proposed method is applied to 2 out of the total 4 receiving antennas.
Here is a brief description of the implementation.
The AP equipped with the proposed method is implemented using FPGA and SDR, and uses a circulator to reduce the number of antennas.
The PC performs operations for estimating the spatial channel necessary for realizing the proposed method, and generates signals to which the proposed method is applied.
The AP, which consists of FPGA and SDR, actually sends and receives the signal generated by the PC and sends the received signal to the PC.
Also, as shown in the table at the bottom of the slide, no RF canceller or digital canceller is used in this experiment.
The reason for this is that it is easy to evaluate the amount of self-interference cancellation of the proposed method alone, and to demonstrate that full-duplex wireless communication can be realized without an RF canceller. |
IEEE/ICACT20210238 Slide.11
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