Millimeter wave beam tracking method based on volume Kalman filtering

A Kalman filtering and beam tracking technology, applied in the directions of space transmit diversity, radio transmission systems, electrical components, etc., can solve the problem of poor numerical stability of unscented Kalman filtering, decreased filtering accuracy, and computational complexity of unscented Kalman filtering algorithms Advanced problems, achieve complete numerical stability, small point set, and improve beam tracking accuracy

Active Publication Date: 2021-05-28
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] However, the numerical stability of the unscented Kalman filter is poor. As the state dimension increases, the filtering accuracy will drop significantly
And the computational complexity of the unscented Kalman filter algorithm is still high

Method used

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  • Millimeter wave beam tracking method based on volume Kalman filtering
  • Millimeter wave beam tracking method based on volume Kalman filtering
  • Millimeter wave beam tracking method based on volume Kalman filtering

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Embodiment 1

[0151] Embodiment 1. In this embodiment, single-path tracking is taken as an example, in which both the transmitting and receiving ends adopt an analog beamforming system, and are equipped with a uniform linear array with 16 elements, and the distance between the elements is half a wavelength. The tracking time T is 100, the correlation coefficient ρ=0.998, the signal-to-noise ratio (SNR) is 20dB, and the angle variation variance The initial AOA, AOD, and the angles of f and w are all set to 45°, and the dimension of the state vector is n=4, m=2n=8.

[0152] This embodiment includes the following steps:

[0153] Step 1: Establish a communication channel model, as follows:

[0154] 1.1 Calculate the array response vector, beamforming vector f, and beamcombining vector w at the initial transceiver end:

[0155]

[0156]

[0157]

[0158]

[0159] 1.2 Calculate the initial received signal:

[0160]

[0161] y=w H h H f+n

[0162] Step 2: Given the initial co...

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Abstract

The invention discloses a millimeter wave beam tracking method based on volume Kalman filtering. The method comprises the following steps: 1, establishing a communication channel model; 2, giving initial conditions of a filter, and completing initialization; 3, calculating a volume point set; 4, performing state prediction; 5, updating the state; and 6, judging a threshold value, and detecting the tracking effectiveness. According to the method, under the simulation beam forming system, the nonlinear transmission problem of the mean value and the covariance is solved through volume transformation, complete numerical stability is achieved, and the beam tracking precision is improved. According to the wave beam tracking method based on the volume Kalman filtering, a sampling point set is generated in a certain mode in each iteration process, and compared with unscented Kalman filtering, the point set is smaller, the calculation complexity is lower, and the efficiency is higher.

Description

technical field [0001] The invention belongs to the technical field of millimeter wave communication, and in particular relates to a millimeter wave beam tracking method based on volumetric Kalman filtering. Background technique [0002] As a new-generation communication standard, 5G needs to increase the data rate by 10 times, the average cell throughput by 25 times, and the system capacity by 1,000 times compared with the previous 4G. However, the increase in data throughput requires the provision of greater bandwidth. The frequency bands previously used by 5G are concentrated below 6GHz. At present, the spectrum resources in this frequency band are very tight. Therefore, it is necessary to find new spectrum resources for 5G. Millimeter waves have attracted widespread attention due to their huge license-free continuous bandwidth (30-300GHz) and high-speed data transmission capabilities. [0003] However, the diffraction ability of millimeter waves is poor, and the path l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06
CPCH04B7/0617Y02D30/70
Inventor 仲伟志李鹏辉张俊杰朱秋明陈小敏
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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