Cross polarization interference compensation device, cross polarization interference compensation method and program

Abstract

Cross polarization interference can be compensated even in the case that dual polarization transmitters of opposing station devices output different signals. A cross polarization interference compensation device is provided with a main signal reception unit which receives a signal having a first polarization direction; an interference signal reception unit which receives a signal having a second polarization direction which intersects the first polarization direction; a phase control unit which controls a phase of the interference signal; an interference compensation signal generation unit which generates an interference compensation signal by chronological weighted synthesis of the signal output from the phase control unit, and sets a weighting coefficient used in the weighted synthesis so that the interference compensation signal becomes a cross polarization interference component of the main signal; a phase estimation unit which estimates a phase difference between the main signal and the interference signal using information relating to the weighting coefficient; and a compensation unit which compensates the cross polarization interference using the interference compensation signal; wherein the phase control unit controls the phase of the interference signal using the phase difference estimated by the phase estimation unit so that the phase of the main signal matches the phase of the interference signal.

Description

technical field [0001] The present invention relates to a cross-polarization interference compensation device, a cross-polarization interference compensation method and a program, which compensate cross-polarization interference caused by a signal with a second polarization direction of a signal with a first polarization direction, said first The second polarization direction crosses the first polarization direction. Background technique [0002] A cross-polarization scheme is used in digital microwave wireless communications. In the cross-polarization scheme, two polarizations (cross-polarization) that are orthogonal to each other, such as vertical polarization (V-polarization) and horizontal polarization (H-polarization), are modulated with different signals to send different information to enable efficient use of frequencies. However, when a cross-polarization scheme is employed, if there is propagation disturbance (eg rain), anisotropy in the medium occurs and thus dis...

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Problems solved by technology

[0014] However, the cross-polarization interference compensation method disclosed in Patent Document 2 has a problem that the opposite station device side needs to perform transmission output control during the adjustment operation, and thus the control becomes complicated

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