A Blind Carrier Recovery Method Against Phase Noise Suitable for High-Order Modulation

A carrier recovery and phase noise technology, applied in the direction of modulated carrier system, carrier adjustment, multi-carrier system, etc., can solve the problems of judgment error, phase noise not considered, low modulation order, etc., to reduce complexity and improve frequency band utilization rate, the effect of suppressing the influence of phase noise
CN108683620BActive Publication Date: 2021-08-17XIDIAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
XIDIAN UNIV
Publication Date
2021-08-17

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Abstract

The invention belongs to the technical field of wireless communication, and discloses a phase noise-resistant blind carrier recovery method suitable for high-order modulation. The invention is based on the original judgment-based extended Kalman carrier recovery algorithm suitable for low-order QAM modulation , adding a mode selection module for selecting different frequency offset step size and mean square error value calculation length parameters. By calculating the mean square error value of the symbol before and after the decision of different lengths, the frequency offset step size parameter of the extended Kalman is adaptively selected, so that the extended Kalman filter algorithm can also take into account the large frequency offset capture performance and low frequency offset in the high-order modulation system. Steady-state jitter performance. The carrier recovery algorithm of the present invention is a blind carrier recovery algorithm, and it is verified by simulation that it can resist phase noise and is an algorithm suitable for high-order modulation modes.
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Description

technical field

[0001] The invention belongs to the technical field of wireless communication, and in particular relates to an anti-phase noise blind carrier recovery method and a wireless communication system suitable for high-order modulation modes. Background technique

[0002] At present, the existing technologies commonly used in the industry are as follows: Mobile communication has entered the LTE era and is about to enter the 5G era, requiring greater backhaul bandwidth. The service throughput of a single base station in the 5G communication standard needs to reach 10Gbps. The point-to-point microwave transmission link is a cost-effective technology for flexible and rapid deployment of the backhaul network. It is the main backhaul method in the mobile network. At the same time, it still maintains this position in the evolution of mobile broadband, providing larger and more efficient air interfaces. Bandwidth is the main goal of microwave communication technology deve...

Claims

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