Single-carrier full-duplex polarization self-interference eliminating method based on phase noise Gauss whitening

Abstract

The invention discloses a single-carrier full-duplex polarization self-interference eliminating method based on phase noise Gauss whitening and belongs to the technical field of wireless communication. The polarization self-interference eliminating method which eliminates effects of phase noise on self-interference signals and desired signals simultaneously comprises two steps: step 1, the effect of phase noise on the self-interference signals is converted into the effect on the desired signals and white noise by using the unitary matrix rotation characteristic, and reconstructed signals are used for offsetting the self-interference signals; step 2, the effect of phase noise on the desired signals is converted into the effect on the white noise by using the unitary matrix rotation characteristic, and the desired signals are recovered. Numerical simulation and analysis indicate that the algorithm effectively avoid the effect of phase noise at transmitting and receiving ends on elimination of the self-interference signals and recovery of the desired signals, and the self-interference elimination amount is increased on the premise that the desired signals are recovered.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a polarization information processing technology and a phase noise elimination technology in a single-carrier full-duplex system. Specifically, it refers to a single-carrier full-duplex polarization self-interference cancellation method based on phase noise Gaussian whitening. Background technique [0002] Full-duplex communication allows a node to perform two-way communication at the same time and in the same frequency band. Compared with traditional TDD and FDD communication, full-duplex communication has higher spectral efficiency, greater throughput, and less signaling overhead As well as smaller transmission delays, it can better meet the needs of next-generation communications. A key challenge for full-duplex communication is the self-interference signal coupled into the local receiver by the local transmitter, which is 60dB-100dB higher than the...

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Problems solved by technology

[0003] The existing methods to solve the effect of phase noise on self-interference cancellation are mainly estimation and compensation. By inserting pilots and estimating the influence of phase noise on self-interference signals to increase the amount of cancellation, the existing methods to solve the effect of phase noise on self-interference cancellation are only Considering the influence of phase noise on the interfering signal, ignoring the influence of phase noise on the desired signal; secondly, the choice of estimation method will also affect the amount of self-interference signal cancellation; in addition, due to the additional overhead introduced by the insertion of pilots, it reduces the The effective transmission rate of data, so the traditional time-frequency domain anti-phase noise method has obvious defects and is not universally applicable

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