Polarization channel XPD estimation algorithm based on ISLS

A technology for polarized channel and channel estimation, which is applied in the field of estimation algorithms to improve XPD estimation performance, can solve problems such as reducing system performance, improving bit error rate, power leakage, etc., and achieves the effect of good estimation performance

Active Publication Date: 2018-02-23
BEIJING UNIV OF POSTS & TELECOMM
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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 de

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  • Polarization channel XPD estimation algorithm based on ISLS
  • Polarization channel XPD estimation algorithm based on ISLS
  • Polarization channel XPD estimation algorithm based on ISLS

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Embodiment Construction

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0024] The present invention proposes a method for estimating XPD at the receiving end.

[0025] In wireless communication systems, due to the complexity of the wireless environment, polarization technologies such as polarization diversity, dual-polarization MassiveMIMO and polarization modulation are susceptible to channel depolarization effects XPD, such as data rate reduction and bit error rate increase , greatly reducing system performance.

[0026] The present invention proposes an ISLS-based polarization channel XPD estimation algorithm, that is, the pilot sequence is transmitted at the transmitting end, and at the receiving end we introduce the scattering factor γ on the basis of the LS estimation method and continuously iterate to reduce channel coefficient estimation errors. Then we obtain the autocorrelation matrix of the channel by multiplying the...

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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 ...

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Application Information

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IPC IPC(8): H04L25/02H04B7/00H04B7/0413H04B7/10
CPCH04B7/002H04B7/0413H04B7/10H04L25/0204
Inventor 刘芳芳王炳程冯春燕赵殊伦
Owner BEIJING UNIV OF POSTS & TELECOMM
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