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A single-carrier full-duplex polarization self-interference cancellation method based on phase noise Gaussian whitening

A technology of self-interference elimination and phase noise, which is applied in the direction of electrical components, orthogonal multiplexing systems, multiplexing communications, etc., can solve the problem of affecting the amount of self-interference signal cancellation, reducing the effective transmission rate of data, and not having universal Applicability and other issues to achieve the effect of improving the effective data transmission rate and solving the problem of eliminating the increase in margin

Active Publication Date: 2018-02-06
BEIJING UNIV OF POSTS & TELECOMM
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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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  • A single-carrier full-duplex polarization self-interference cancellation method based on phase noise Gaussian whitening
  • A single-carrier full-duplex polarization self-interference cancellation method based on phase noise Gaussian whitening
  • A single-carrier full-duplex polarization self-interference cancellation method based on phase noise Gaussian whitening

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[0032] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0033] The invention provides a single-carrier full-duplex polarization self-interference elimination method based on phase noise Gaussian whitening.

[0034] The present invention adopts such as figure 1 The polarized full-duplex communication model shown, the difference between this communication model and the traditional (time domain / frequency domain) full-duplex communication model is that a polarization control module is introduced at the transmitter, the signal first passes through the coding and modulation module, and then Enter the polarization control module. The polarization control module is composed of a power divider and a phase shift device. The power divider can adjust the amplitude ratio of the two branches of the polarization signal. The phase shift device controls the phase difference of the two branch signals. The signal passes thro...

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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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J11/00
CPCH04J11/0036
Inventor 刘芳芳贾松霖郭彩丽冯春燕
Owner BEIJING UNIV OF POSTS & TELECOMM
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