Transmitter-Receiver Isolation Technology Based On Adaptive Noise Cancellation

Transmitter-Receiver isolation is a key technology in a lot of jamming systems. For the sake of transmitter-receiver isolation, many jamming have to use the time-division technology.On the self-screen jamming conditions, it is required that the relative delay between the signal of jamming and the signal of self-echo is short as possible for the aim of to recover the real echo. If the delay is too short, the jamming transmit signal at the same time it receive the radar signal. On this condition, the transmitted signal received by the receiver arose transmit-receive self-excitation.Transmitter-Receiver isolation is a kind of technology to ensure the receiving of the radar signal and don't produce transmit-receive self-excitation when the jamming transmit noise.The paper introduces the adaptive signal process and adaptive filter technology. From the point of the specifically jamming circumstance, the paper selects the adaptive algorithms and architectures, and discusses the jamming transmitter-receiver isolation's method of using adaptive noise cancellation. On the base of adaptive algorithms, the paper designs a kind of pipe-line ANC use FPGA and simulate the ANC.