Multi-interference-source wide-frequency-coverage radio frequency self-interference cancellation device and method.

Abstract

The invention discloses a multi-interference-source wide-frequency-coverage radio frequency self-interference cancellation device and method. The multi-interference-source wide-frequency-coverage radio frequency self-interference cancellation device comprises a multi-interference-source interference reference signal down-conversion module, a multi-interference-source radio frequency domain interference reconstruction module, an interference reconstruction signal up-conversion module, a synthetic interference cancellation module, a power division module and an interference control module. According to the invention, down-conversion is carried out on multiple paths of wide-frequency interference reference signals. Mutiple paths of interference reference signals of fixed intermediate frequency are acquired. Each path of interference reference signal is reconstructed through a multi-interference-source radio frequency domain interference reconstruction module controlled by an interferencecontrol module. After the reconstruction signals are synthesized to obtain multi-interference-source interference reconstruction signals, the multi-interference-source interference reconstruction signals are subjected to up-conversion and radio frequency wide frequency returning, the multi-interference-source interference reconstruction signals are input into the interference synthesis cancellation module to be synthesized with the interfered radio frequency receiving signals to achieve interference cancellation, and complexity of interference reconstruction is reduced.

Description

technical field [0001] The invention relates to self-interference cancellation, in particular to a radio frequency self-interference cancellation device and method with multiple interference sources and wide frequency coverage. Background technique [0002] At the same time, the same-frequency full-duplex technology breaks through the limitation of time-frequency resource utilization of existing time-division duplex and frequency-division duplex, and has the ability to double the spectrum efficiency. Since the local transmitter and receiver transmit and receive at the same time and frequency at the same time, the transmitted signal of the local transmitter will cause strong self-interference to the local receiver. In order to ensure normal communication, the receiver needs to effectively suppress the self-interference. [0003] In the process of suppressing self-interference signals, it is often necessary to reconstruct radio frequency self-interference signals. However, in ...

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Problems solved by technology

[0003] In the process of suppressing self-interference signals, it is often necessary to reconstruct radio frequency self-interference signals. However, in the process of self-interference cancellation in the radio frequency domain covered by wide frequency (such as 30MHz~6000MHz), due to the wide frequency coverage, if the direct Reconstructing the interference signal will have the problems of difficulty in implementation, high device cost, and high reconstruction complexity; especially in the case of multiple interference sources, it is necessary to perform self-interference signal reconstruction and cancellation for multiple interference sources, and directly reconstruct the interference signal will further increase the implementation difficulty and cost of the device

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