In order to enhance wireless communication system’s robustness against interferences, a method of multi-channel backup transmission based on microwave photonics is proposed. It utilizes a spectrum replicating structure composed of optical frequency comb and other optoelectronic devices. The transmitter replicates the spectrum of signal to be sent onto multiple different channels and sends them simultaneously. The receiver carries out spectrum replicating with a certain overlap, which down-converts different channels’ receiving signals to the same band, so that they can be extracted by the same designed filters and then demodulated separately. In this way, multi-channel backup transmission for the same information is achieved. A five-channel backup transmission system is simulated as an example. Simulation results show that when parts of channels are interfered, the communication system can still work well using the other non-interference channels. This method provides a candidate for exploring new wireless communication anti-interference technique regimes.
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