Self-interference elimination method applied to radio frequency port of wireless channel simulator

Abstract

The invention relates to the technical field of wireless channel simulation. The present invention provides a self-interference elimination method applied to the radio frequency port of a wireless channel simulator. Interference of self-interference signals on the port of the wireless channel simulator is eliminated, a calculation part which consumes relatively overlarge resources is achieved through software, a hardware part is only responsible for synthesizing reverse signals of the self-interference in real time, and software is reasonably controlled to realize time delay of an estimation part, so that new self-interference amplitude and phase are estimated before a self-interference signal changes in a large range, and self-interference elimination can be realized under the condition of extremely low hardware resource overhead. Meanwhile, key timing synchronization, amplitude estimation and phase estimation are all checked, and the error data size and the accidental error rate can be effectively reduced through comparison between historical threshold data and actually obtained real-time data.

Description

technical field [0001] The invention belongs to the technical field of wireless channel emulation, and in particular relates to a self-interference elimination method applied to a radio frequency port of a wireless channel emulator. Background technique [0002] The wireless channel emulator is a wireless channel emulation device, and its signal input and output ports are generally duplex. Due to the poor isolation effect of the power divider or the echo of the antenna, there will be self-interference signals on the RF port of the emulator. The power of the self-interference signal will be far greater than the power of the received signal, which will cause serious interference to the receiving system of the simulator. Not only useful information will be submerged in the strong self-interference signal, but it will also bring unexpected "fading" to the wireless channel simulation. It will cause errors in receiving data, and the low noise amplifier of the receiving link will ...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a self-interference elimination method applied to the radio frequency port of a wireless channel emulator, which is used to solve the technical problems in the above-mentioned prior art, such as: the power of the self-interference signal will be far greater than the power of the received signal, It causes serious interference to the receiving system of the emulator, not only the useful information is submerged in the strong self-interference signal, but also brings unexpected "fading" to the wireless channel simulation, resulting in receiving data errors, and the low noise amplifier of the receiving link is also damaged. It will be close to saturation and cause serious harm to the hardware of the receiving system; at the same time, the working principle of the wireless channel emulator system is complex and consumes a lot of resources, leaving very limited hardware resources for port self-interference cancellation

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