Polarization channel XPD estimation algorithm based on ISLS

Abstract

The invention discloses a polarization channel XPD estimation algorithm based on ISLS. The method comprises the following steps: firstly establishing a transmitting / receiving model based on a pilot frequency sequence under a dual-polarization channel; and secondly, proposing a method for estimating the dual-polarization channel XPD at a receiving end. In this method disclosed by the invention, a scattering factor gamma is introduced on the basis of the LS estimation method at the receiving end, and the channel coefficient estimation error is reduced through continuous iteration, so that more accurate channel coefficient value can be acquired in comparison with the LS algorithm; and then an autocorrelation matrix of the polarization channel is acquired by multiplying the polarization channel matrixes to take the mean; since the XPD is the parameter of the polarization channel autocorrelation matrix, the XPD value of the polarization channel can be acquired through the polarization channel autocorrelation matrix; and finally, the XPD estimation precision can be effectively promoted through the theoretical and simulation analysis.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and is a method for estimating XPD at a receiving end, specifically, an estimation algorithm for improving XPD estimation performance by using channel statistical information and iteration. Background technique [0002] Polarization techniques, such as polarization diversity, dual-polarization Massive MIMO and polar modulation, have been widely used in wireless communication. However, complex wireless channel characteristics will produce complex and changeable depolarization effects, such as cross polarization discrimination (Cross Polarization Discrimination: XPD), which will seriously affect the performance of polarization technology. The depolarization effect describes the power leakage between the co-polarization channel and the cross-polarization channel under the dual-polarization channel. The resulting cross-polarization interference will reduce the system data transmission ...

AI Technical Summary

Problems solved by technology

However, complex wireless channel characteristics will produce complex and changeable depolarization effects, such as cross polarization discrimination (Cross Polarization Discrimination: XPD), which will seriously affect the performance of polarization technology

The depolarization effect describes the power leakage between the co-polarization channel and the cross-polarization channel under the dual-polarization channel. The resulting cross-polarization interference will reduce the system data transmission rate and increase the bit error rate. Serious reduce system performance

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